WO2019214657A1 - 时域资源分配、确定方法、装置、基站、终端及存储介质 - Google Patents
时域资源分配、确定方法、装置、基站、终端及存储介质 Download PDFInfo
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- WO2019214657A1 WO2019214657A1 PCT/CN2019/086087 CN2019086087W WO2019214657A1 WO 2019214657 A1 WO2019214657 A1 WO 2019214657A1 CN 2019086087 W CN2019086087 W CN 2019086087W WO 2019214657 A1 WO2019214657 A1 WO 2019214657A1
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- 238000000034 method Methods 0.000 title claims abstract description 73
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- 238000010586 diagram Methods 0.000 description 8
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- 238000005516 engineering process Methods 0.000 description 5
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present application relates to the field of communications, for example, to a time domain resource allocation, a determining method, an apparatus, a base station, a terminal, and a storage medium.
- the 5th Generation (5th Generation, 5G) technology introduces the concept of Bandwidth Part (BWP) in order to reduce the energy consumption of User Equipment (UE).
- the base station first configures a set of BWPs for the UE, and then the base station can instruct the UE to dynamically switch the BWP by using downlink control information.
- the UE needs a certain time to complete the handover of the original BWP to the target BWP. Therefore, the base station needs to ensure sufficient BWP handover time when performing time domain resource allocation. Otherwise, the BWP handover of the UE will fail.
- the related scheme needs to set a handover specific indication line in the time domain resource allocation table to specify the target time slot deviation after the handover occurs to the UE, so that one or more always exist in the time domain resource allocation table regardless of whether the handover occurs.
- Switch the dedicated indicator line The number of rows in the time domain resource allocation table is limited. When the switching dedicated indicator row is set, the available rows that can carry other transmitted indication information are reduced, which limits the indication to other transmissions to some extent. Transmission of information.
- the technical problem that the time domain resource allocation, the determining method, the device, the base station, the terminal, and the storage medium provided by the embodiment of the present invention are mainly solved is: setting the switching exclusive indication line in the time domain resource allocation table of the BWP by the base station proposed at the present stage To specify the target time slot deviation in the case of partial bandwidth resource switching, it is necessary to occupy a large number of rows in the time domain resource allocation table, which limits the transmission of indication information of other transmissions, which is not conducive to optimal resource configuration.
- an embodiment of the present invention provides a method for determining a time domain resource, including:
- the embodiment of the invention further provides a time domain resource allocation method, including:
- Transmitting indication information including the target partial bandwidth resource index identifier and the time domain resource allocation indication information is sent to the terminal.
- the embodiment of the invention further provides a time domain resource determining apparatus, including:
- the handover determining unit is configured to determine, according to the original part of the bandwidth resource and the target part of the bandwidth resource, the number of handover time slots required for the current part of the bandwidth resource handover, where the original part of the bandwidth resource and the target part of the bandwidth resource are the terminal Part of the bandwidth resources used before and after partial bandwidth resource switching;
- the target time slot determining unit is configured to determine, according to the number of the switched time slots and the basic time slot deviation, a target time slot deviation for performing data transmission by using the target part of the bandwidth resource, where the basic time slot deviation is according to the transmission indication information sent by the base station
- the time domain resource allocation indication information carried in the determination is determined.
- the embodiment of the invention further provides a time domain resource allocation device, including:
- the handover determining unit is configured to determine a target partial bandwidth resource used for transmission after the partial bandwidth resource switching;
- the indication transmission unit is configured to send, to the terminal, transmission indication information including the target partial bandwidth resource index identifier and the time domain resource allocation indication information.
- An embodiment of the present invention further provides a base station, including a processor, a memory, a communication device, and a communication bus;
- the communication bus is configured to implement connection communication between the processor and the memory, the processor, and the communication device;
- the processor is configured to execute at least one program stored in the memory to implement the method of time domain resource allocation of any of the above.
- the embodiment of the invention further provides a terminal, which comprises a processor, a memory, a communication device and a communication bus;
- the communication bus is used to implement connection communication between the processor and the memory, the processor, and the communication device;
- the processor is operative to execute at least one program stored in the memory to implement the method of time domain resource determination of any of the above.
- the embodiment of the present invention further provides a storage medium, where the storage medium stores at least one of a time domain resource allocation program and a time domain resource determining program, where the time domain resource allocation program can be executed by at least one processor to implement any of the foregoing.
- the embodiments of the present invention provide a time domain resource allocation, a determining method, a device, a base station, a terminal, and a storage medium.
- a switching specific indication line in a time domain resource allocation table of a BWP it is easy to restrict transmission of other transmission indication information.
- the base station may determine the target part of the bandwidth resource used for the transmission after the handover, and then The terminal sends the transmission indication information that includes the target part bandwidth resource index identifier.
- the terminal may determine, according to the target part bandwidth resource and the original part bandwidth resource, the number of handover time slots required for the current partial bandwidth resource handover; thereby determining, according to the number of handover time slots and the basic time slot deviation specified by the base station. Target time slot deviation.
- the terminal may determine the number of handover time slots according to the information provided by the base station, and determine the target time slot deviation according to the basic time slot deviation indicated by the base station, without relying on the dependency time.
- the switch-specific indication line in the domain resource allocation table when part of the bandwidth resource is switched, the terminal may determine the number of handover time slots according to the information provided by the base station, and determine the target time slot deviation according to the basic time slot deviation indicated by the base station, without relying on the dependency time.
- one or more rows are not used in the time domain resource allocation table as the switching dedicated indication row, which greatly reduces the occupation of the time domain resource allocation table by part of the bandwidth resource switching.
- the space in the time domain resource allocation table is saved, which provides more opportunities for the transmission of other transmitted information, and is beneficial to the optimal configuration of resources.
- the scheme for indicating the target time slot deviation is indicated by the handover specific indication line in the time domain resource allocation table.
- the switching exclusive instruction line needs to be retained in the time domain resource allocation table, which brings The resource is wasted. Therefore, the solution provided by the embodiment of the present invention improves the resource utilization rate compared with the solution proposed at the present stage.
- FIG. 1 is an interaction diagram between a base station and a terminal in a time domain resource allocation process according to Embodiment 1 of the present invention
- FIG. 3 is a flowchart of determining, according to a target part bandwidth resource and an original part bandwidth resource, a number of handover time slots according to Embodiment 1 of the present invention
- FIG. 4 is a flowchart of a time domain resource allocation method according to Embodiment 2 of the present invention.
- FIG. 5 is a flowchart of a method for determining a time domain resource according to Embodiment 2 of the present invention.
- FIG. 6 is a schematic structural diagram of a time domain resource allocation apparatus according to Embodiment 3 of the present invention.
- FIG. 7 is a schematic structural diagram of a time domain resource determining apparatus according to Embodiment 4 of the present invention.
- FIG. 8 is another schematic structural diagram of a time domain resource determining apparatus according to Embodiment 4 of the present invention.
- FIG. 9 is a schematic structural diagram of a hardware of a base station according to Embodiment 5 of the present invention.
- FIG. 10 is a schematic structural diagram of a hardware of a terminal provided in Embodiment 5 of the present invention.
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- 5G technology has become the trend of future network development.
- LTE Long Term Evolution
- 5G has been improved in many aspects.
- the UE is allowed to select the corresponding BWP according to the type of data to be transmitted in the 5G, which is beneficial to avoid that all the transmissions of the UE use the same bandwidth in the traditional LTE technology, and it is easy to bring The problem of unnecessary energy waste.
- the base station Before the UE performs transmission, the base station configures a set of BWPs for it, including a BWP for the uplink and a BWP for the downlink. Usually, the base station configures 4 downlink BWPs and 4 uplinks for the UE. BWP. Subcarrier spacing (SCS), bandwidth, and frequency domain location may be independently configured for different BWPs, that is, different BWPs may have different configuration parameters.
- the base station can instruct the UE to dynamically switch the BWP used for the transmission by using Downlink Control Information (DCI), so that the UE can switch the appropriate BWP according to different transmission requirements, thereby reducing the energy consumption in the transmission.
- DCI Downlink Control Information
- BWP switching refers to the transition from the currently used BWP (hereinafter referred to as “the original BWP” for ease of introduction) to the new BWP (hereinafter referred to as "target BWP” for ease of introduction). It is worth noting that the BWP handover is determined according to the received DCI, and the UE does not perform data transmission and reception in the process of switching to the target BWP. Only after the BWP handover is completed can the UE continue data transmission on the target BWP.
- the BWP handover requires a certain time. If the base station does not guarantee sufficient handover time for the UE when performing time domain resource allocation, the BWP handover of the UE may fail.
- the solution proposed at this stage is that the base station sets a "switching dedicated indication line" dedicated to the BWP handover in the time domain resource allocation table of the BWP, and the base station will indicate the corresponding in the handover specific indication line.
- the target time slot deviation after the handover it should be understood that the target time slot deviation is calculated by the base station, and it can ensure that the UE has sufficient switching time.
- the time domain resource allocation table of each BWP should include three handover specific indication lines, which respectively correspond to switching from the other three BWPs to the BWP. Scenes.
- the four BWPs of the downlink are A, B, C, and D, respectively
- three switching dedicated indication lines will be set in the time domain resource allocation table of A, respectively for indicating the switching from B to A.
- the DCI information that is sent to the UE also carries a time domain resource allocation indication field, which is used to specify to the terminal which row in the time domain resource allocation table to determine the target time slot offset, so that the UE can query the time domain.
- the resource allocation table determines the location of the corresponding target time domain resource after switching from D to B.
- the number of rows in the time domain resource allocation table is limited and cannot be extended indefinitely.
- the number of rows in the time domain resource allocation table may be related to the number of bits occupied by the time domain resource allocation indication field in the DCI information, where the number of rows is 2 n , where n is the time domain resource allocation indication field in the DCI information. Number of digits. For example, when n is 2, the time domain resource allocation table may have 4 rows, and when n is 3, the time domain resource allocation table may have 8 rows. Therefore, if a handover specific indication line corresponding to each handover scenario is set in the time domain resource allocation table, the time domain resource allocation table can only use the remaining rows to carry other transmitted information: continue to configure four base stations for the UE.
- the downlink BWP is taken as an example.
- the base station can only use the remaining 1 row to carry the indication information of other transmissions; in the case where the time domain resource allocation table includes 8 rows, The base station can use the remaining 5 lines to carry indication information of other transmissions... This severely limits the transmission of other indication information.
- the time domain resource allocation indication field in the DCI information only occupies 1 bit, since the time domain resource allocation table has only 2 rows, the time domain resource allocation table cannot even cover all necessary switching exclusive indication lines.
- the time domain resource allocation table needs to be set to switch the dedicated indication line, thereby causing serious limitation on the transmission of other indication information, and the present embodiment provides a time domain resource allocation method and A time domain resource determining method, wherein the time domain resource allocation method can be performed by the base station side, and the time domain resource determining method can be performed by the terminal side.
- FIG. 1 shows a base station performing time domain resource allocation method and The terminal executes the time domain resource determining method to implement the interaction diagram in the time domain resource allocation process:
- the base station determines a target partial bandwidth resource used for the transmission after the handover.
- the base station can reasonably select one or more of the bandwidth resources allocated for the terminal according to the type of data to be currently transmitted. Used for the transmission of the current data to be transmitted.
- part of the bandwidth resources reselected by the base station is different from the part of the bandwidth resources currently being used, part of the bandwidth resource switching needs to be performed. Therefore, the partial bandwidth resource switching actually refers to the "original part bandwidth resource" currently being used. The process of switching to the new "target bandwidth resource".
- the "partial bandwidth resource” referred to in this embodiment actually refers to a continuous resource block (RB) resource, which is also called a BWP resource.
- RB resource block
- the base station determines that it needs to switch some of the bandwidth resources used between the terminal and the terminal, it acquires the index identifier of the bandwidth resource of the target part. For example, when the base station and the terminal are about to perform downlink data transmission, but the base station finds that some of the bandwidth resources A currently used are not suitable, and the part of the bandwidth resource C is required, the base station determines that C will be the target part of the bandwidth resource, so the target is obtained.
- the index of the partial bandwidth resource (Index) is "c".
- the base station sends, to the terminal, the transmission indication information that includes the target part bandwidth resource index identifier and the time domain resource allocation indication information.
- the base station After determining the target part of the bandwidth resource, the base station sends the transmission indication information to the terminal, where the transmission indication information carries the index identifier of the target part of the bandwidth resource.
- the base station sends the transmission indication information to the terminal by using the original partial bandwidth resource. Therefore, in some examples, the base station will use the partial bandwidth resource A to send the transmission indication information.
- the transmission indication information may include, but is not limited to, DCI, ie, downlink control information.
- the transmission indication information sent by the base station may further include time domain resource allocation indication information used for the basic time slot deviation specified by the terminal, and the basic time slot deviation is used by the terminal side to calculate the handover required for partial bandwidth resource switching. After the number of time slots, the target time slot offset is calculated.
- the base station may use the time domain resource allocation indication field in the transmission indication information (for example, DCI information) as the time domain resource allocation indication information, and the time domain resource allocation indication field cooperates with the time domain resource allocation table to specify the basic time slot deviation to the terminal.
- the terminal may obtain the time domain resource allocation table, and in the time domain resource allocation table, at least two basic time slot deviations may be configured, so that the terminal knows from at least two Which one of the basic time slot deviations is selected, so the base station carries the time domain resource allocation indication field in the DCI information, and the time domain resource allocation indication field can enable the terminal to select a basic time slot designated by the base station from the time domain resource allocation table. deviation. For example, 16 rows are included in the time domain resource allocation table, and these 16 rows are configured basic time slot deviations, and the unique identifiers of the rows in the 16 rows are numbers "0", "1", ... "15", respectively.
- the value corresponding to the time domain resource allocation indication field is “2”, indicating that the basic time slot deviation specified by the base station for the terminal is the unique identifier in the time domain resource allocation table is “2”. one of.
- the time domain resource allocation table is not fixed because it is configured by the base station. Therefore, if the base station configures the time domain resource allocation table differently, the time domain resource allocation table acquired by the terminal is different. . It can be understood that the current time domain resource allocation table is always used between the base station and the terminal, that is, the newly configured time domain resource allocation table determines the basic time slot deviation.
- the basic time slot deviation is a time domain resource location that is configured by the Radio Resource Control (RRC) layer of the base station and is independent of the switching duration of partial bandwidth resource switching, and can be used not only for partial bandwidth resource switching. Determining the target time slot offset can also be used to determine the target time slot offset when no partial bandwidth resource switching is required. For example, when a base station and a terminal continuously use a part of bandwidth resources for data transmission, when the base station allocates time domain resources to the terminal, the time domain resource allocation table is also used, in which case, when the base station specifies A certain basic time slot deviation in the domain resource allocation table is actually the target time slot deviation. Therefore, the basic time slot deviation does not need to ensure that the terminal has sufficient switching duration.
- RRC Radio Resource Control
- the base station When the basic time slot deviation is configured, the base station does not need to care whether there is partial bandwidth resource switching, and only needs to be configured according to the usual time domain resource configuration scheme. Therefore, in the embodiment, the basic time slot deviation of the base station is simpler, and the partial bandwidth is not considered in comparison with the target time slot deviation of the dedicated and partial bandwidth resource switching scenarios configured by the base station in the handover specific instruction line. The time limit brought by resource switching.
- the basic time slot deviation includes an uplink basic time slot deviation or a downlink basic time slot deviation, wherein the uplink basic time slot deviation corresponds to K2 in the time domain resource allocation table, and the downlink basic time slot deviation corresponds to K0 in the time domain resource allocation table.
- the basic time slot deviation specified by the base station from the time domain resource allocation table for the terminal should be the downlink basic time slot deviation for the downlink, that is, K0;
- Receiving the data sent by the terminal the basic time slot deviation specified by the terminal using the time domain resource allocation table for the terminal should be the uplink basic time slot deviation for the uplink, that is, K2.
- time domain resource allocation table in this embodiment is still set in units of partial bandwidth resources, that is, each partial bandwidth resource has a corresponding time domain resource allocation table.
- the terminal When determining, according to the indication information that the part of the bandwidth resource needs to be switched, the terminal determines, according to the index identifier, a target part of the bandwidth resource used for the transmission after the partial bandwidth resource is switched.
- the terminal may receive the transmission indication information sent by the base station, and according to the index identifier carried in the transmission indication information, the terminal may determine whether part of the bandwidth resource switching needs to be performed currently. For example, the terminal performs a "blind check" on the original part of the bandwidth resource. It is assumed that the index of the original part of the bandwidth resource is "a". Through the blind detection, the terminal may receive the transmission indication information sent by the base station through the original part of the bandwidth resource A, where the transmission indication information carries the index identifier of the target part of the bandwidth resource. By comparing whether the index identifier of the bandwidth resource of the original part is consistent with the index identifier carried in the transmission indication information, the terminal may determine whether part of the bandwidth resource switching needs to be performed currently.
- the terminal determines that the base station has instructed itself to switch to another part of the bandwidth resource for data transmission. In this case, the terminal can further determine which of the target partial bandwidth resources indicated by the base station. For example, in the foregoing example, since the index identifier carried by the base station in the transmission indication information is “c”, “c” is inconsistent with the index identifier “a” of the original partial bandwidth resource A for the blind detection, so the terminal can learn the base station. Indicates that part of the bandwidth resource is switched, and the target part of the bandwidth resource used after the handover is C whose index identifier is "c".
- mapping type of the shared channel is usually divided into two types: mapping type one (also called “mapping type A”) and mapping type two (also called “mapping type B").
- mapping type A also called “mapping type A”
- mapping type two also called “mapping type B”
- the base station upper layer adopts mutually independent DMRS configurations for the mapping type A and the mapping type B. That is, the DMRS configuration parameter of the mapping type A may be the same as or different from the DMRS configuration parameter of the mapping type B.
- the type of DMRS in the DMRS configuration parameter (specifically, "DL-DMRS-config-type" in the DMRS configuration parameter) and the maximum length of the DMRS (specifically, may be in the DMRS configuration parameter) DL-DMRS-max-len”) can affect the size of the antenna port field in the transmission indication information sent by the base station to the terminal, and thus affect the size of the transmission indication information.
- the type of the DMRS in the DMRS configuration parameter (specifically, "UL-DMRS-config-type" in the DMRS configuration parameter) and the maximum length of the DMRS (specifically, may be in the DMRS configuration parameter)
- the UL-DMRS-config-type" and the PUSCH-tp enable value can affect the size of the antenna port field in the transmission indication information sent by the base station to the terminal, and affect the size of the transmission indication information.
- the terminal does not know whether the base station uses the mapping type A to transmit the transmission indication information or the mapping type B to transmit the transmission indication information, and therefore, the terminal cannot determine the transmission. Indicates the size of the antenna port field in the information, and thus the size of the transmission indication information cannot be determined. In this case, if the terminal performs a blind check, the size of the blind check is smaller than the size of the transmission indication information sent by the base station, and the terminal fails the blind check. After the failure of the blind detection, the terminal needs to perform the blind detection again in the same time slot, which makes the blind detection complexity increase. In order to solve the problem, the present embodiment provides two solutions:
- Manner 1 The terminal performs blind detection on the transmission indication information according to the maximum size of the antenna port field in the transmission indication information regardless of the DMRS configuration parameters corresponding to the two mapping types.
- Table 1 shows the correspondence between the DMRS configuration parameters and the antenna port domain for the downlink shared channel:
- DL-DMRS-config-type DL-DMRS-max-len Antenna indicates the size of the field 1 1 4 1 2 5 2 1 5 2 2 6
- the size of the antenna port indication field is up to 6 for the downlink situation. Therefore, if the terminal detects the transmission indication information according to the antenna port indication field, the transmission indication is used regardless of which mapping type the base station uses. Information can be detected by the terminal at one time.
- Table 2 shows the correspondence between the DMRS configuration parameters and the antenna port domain for the uplink shared channel:
- UL-DMRS-config-type UL-DMRS-max-len PUSCH-tp Antenna indicates the size of the field 1 1 Enable 2
- the size of the antenna port indication field is at most 5. Therefore, if the terminal detects the transmission indication information according to the antenna port indication field, no matter which mapping type the base station uses to transmit, the transmission indication information is also Can be detected by the terminal at one time.
- the terminal can also perform blind detection on the transmission indication information according to the second method, as shown in Figure 2:
- S202 Query DMRS configuration parameters corresponding to mapping type 1 and mapping type 2, respectively.
- the terminal side can obtain the configuration parameters of the shared channel mapping type A and the configuration parameters of the shared channel mapping type B, and the configuration parameters of the shared channel mapping type A.
- the configuration parameters of the shared channel mapping type B include the DMRS configuration parameters, so the terminal can query the DMRS configuration parameters corresponding to the mapping type A and the DMRS configuration parameters corresponding to the mapping type B.
- S204 The terminal determines whether the parameters related to the antenna port domain in the DMRS configuration parameters corresponding to the two mapping types are the same.
- the parameter related to the antenna port domain refers to a parameter that can affect the size of the antenna port domain.
- the parameters related to the antenna port domain include the DMRS type and the DMRS maximum length.
- the parameters related to the antenna port domain include the DMRS type, the DMRS maximum length, and the PUSCH-tp enable value.
- S206 Perform blind detection on the transmission indication information according to the size of the antenna port domain corresponding to any one of the two mapping types.
- the terminal may detect the transmission indication information according to the mapping type A or the mapping type B.
- S208 Perform blind detection on the transmission indication information according to a type of the antenna port domain corresponding to the two mapping types.
- the size of the antenna port field should be 5 in the transmission indication information. If the transmission indication information is sent according to the mapping type B, the size of the antenna port field should be 4.
- the terminal is not able to determine whether the size of the antenna port field in the transmission indication information sent by the base station is 5 or 4, the terminal can directly select the corresponding antenna port domain size in the two mapping types in order to detect the transmission indication information at one time.
- the larger one performs the detection that is, the detection of the transmission indication information according to the antenna port field of 5 in the above example.
- S108 The terminal determines, according to the target part of the bandwidth resource and the original part of the bandwidth resource, the number of handover time slots required for the partial bandwidth resource switching.
- the handover durations required for all partial bandwidth resource handovers are the same. Even if the target part bandwidth resources are the same, if the handover is performed from different original partial bandwidth resources, the required handover duration may be different. Similarly, Even if the original part of the bandwidth resources are the same, but the target part of the bandwidth resources are different, the required switching time may also be different. Not to mention the switching scenario where the target part of the bandwidth resource is different from the original part of the bandwidth resource. Therefore, different switching scenarios may correspond to different switching durations.
- the handover scenario is mainly determined according to the relationship between the original part of the bandwidth resource and the target part of the bandwidth resource configuration parameter: in a handover scenario, the original part of the bandwidth resource and the target part of the bandwidth resource have the same bandwidth. (Bandwidth, BW), but the center frequencies of the two are different; in another switching scenario, the original part of the bandwidth resource has the same center frequency as the target part of the bandwidth resource, but the BW of the two is different.
- BW Bandwidth
- the original part of the bandwidth resource has the same center frequency as the target part of the bandwidth resource, but the BW of the two is different.
- Scenario 1 Reconfiguration involves changing the center frequency of the BWP without changing its BW, possibly involving or not changing the SCS.
- the reconfiguration involves changing the center frequency of the BWP without changing its BW.
- the reconfiguration may or may not involve the changing the SCS.
- the scenario 1 refers to the target part of the bandwidth resource compared with the original part of the bandwidth resource, regardless of the child If the carrier spacing is the same or not, the center frequency is different, and the same part of the bandwidth resource switching scenario of the BW.
- Scenario 2 Reconfiguration involves changing the BW of the BWP without changing its center frequency, possibly with or without changing the SCS.
- the second configuration means that the target part of the bandwidth resource is compared with the original part of the bandwidth resource, regardless of the subcarrier spacing and the subcarrier spacing is the same as the original carrier bandwidth. No, the BW is different, and the part of the bandwidth resource with the same center frequency is switched.
- Scenario 3 Reconfiguration involves changing the center frequency of the BW and BWP, with or without involving changes to the SCS. (The reconfiguration involves changing both the BW and the center frequency of the BWP. The reconfiguration may or may not engage the changing the SCS.)
- the scenario 3 refers to the target part bandwidth resource compared with the original part of the bandwidth resource, regardless of the subcarrier spacing is the same No, part of the bandwidth resource switching scenario where the BW and the center frequency are different.
- Scenario 4 Reconfiguration involves changing only the SCS, where the center frequency and BW of the BWP remain unchanged. (The reconfiguration involving changing only the SCS, where the center frequency and BW of the BWP remain unchanged.)
- Scene 4 means that the target part bandwidth resource is the same as the original part bandwidth resource, and the BW and the center frequency are the same, but the subcarrier spacing is different. Part of the bandwidth resource switching scenario.
- FIG. 3 shows a process in which the terminal determines the number of handover slots required for the partial bandwidth resource handover according to the target part bandwidth resource and the original partial bandwidth resource:
- S302 Determine a current handover scenario according to a configuration parameter of the original part of the bandwidth resource and a configuration parameter of the target part of the bandwidth resource.
- the configuration parameters of the bandwidth resource switching scenario and the original part of the bandwidth resource are related to the relationship between the bandwidth resource configuration parameters of the target part. Therefore, after the terminal determines the bandwidth resource of the target part, the configuration parameter and the original bandwidth resource of the target part may be used.
- the configuration parameters of the partial bandwidth resources determine which of the above several scenarios the current handover scenario belongs to. It should be understood that, after the base station configures a part of the bandwidth resource for the terminal, the terminal side stores the configuration parameters of each part of the bandwidth resource. Of course, in other examples of this embodiment, even if the terminal side does not store the configuration parameters of each part of the bandwidth resource, the base station may notify the terminal by transmitting the indication information.
- the terminal can determine the part of the bandwidth resource that needs to be performed according to the configuration parameters of the two. Switching part of the bandwidth resource switch belonging to scenario one.
- S304 Determine a handover duration corresponding to the current handover scenario according to a mapping relationship between the preset handover scenario and the handover duration.
- the terminal pre-stores the mapping relationship between the switching scenario and the switching duration, and each switching scenario has a switching duration corresponding thereto.
- the handover duration is related not only to the handover scenario, but also to the frequency level of the carrier used by the terminal to communicate with the base station, and the capabilities of the terminal.
- the terminal stores a scene-time mapping table, see Table 3 below:
- “1” represents a scene with a carrier frequency less than 6 GHz
- “2” represents a scene with a carrier frequency greater than or equal to 6 GHz.
- the “type 1 switching duration” corresponds to the switching duration of the terminal with high capability in various switching scenarios
- the “switching duration of type 2" corresponds to the switching duration of the terminal with low capability in various switching scenarios.
- the terminal After the terminal determines the current partial bandwidth resource switching scenario, it can determine the corresponding switching duration according to the carrier frequency band used by the communication and its own capability. Assuming that the capability of a certain terminal is high, and the frequency band of the level 1 is used for communication, and the bandwidth resource switching of the first scenario is currently performed, by querying the table 3, it can be determined that the switching of the terminal for the part of the bandwidth resource needs 600us. duration.
- S306 Determine, according to the handover duration and the configuration parameter of the target part bandwidth resource, the number of handover slots required for the partial bandwidth resource handover.
- the handover duration needs to be converted into the number of handover slots.
- the number of handover slots is related not only to the handover duration but also to the subcarrier spacing of the target portion of the bandwidth resource.
- the terminal may first determine the length of the time slot corresponding to the bandwidth subcarrier spacing of the target part, and then calculate the ratio of the switching duration to the length of the single time slot, and round up the ratio to calculate the number of switching time slots.
- the terminal determines, according to the number of handover time slots and the basic time slot deviation, a target time slot deviation for performing data transmission by using the target partial bandwidth resource.
- the terminal may determine, according to the number of handover slots, the value of the target slot offset when the target portion of the bandwidth resource is used for data transmission, that is, the location of the target time domain resource:
- the transmission indication information sent by the base station to the terminal includes time domain resource allocation indication information, and the terminal may combine the bandwidth information of the target part according to the time domain resource allocation indication information.
- the domain resource allocation table determines the basic slot offset.
- the transmission indication information is DCI information. Description: In the DCI information, including a time domain resource allocation domain, the time domain resource allocation domain is used to specify a row in the time domain resource allocation table, that is, two basic time periods in the time domain resource allocation table. Specify one in the gap deviation. Then, the terminal sums the basic time slot deviation and the number of switching time slots to determine the target time slot deviation corresponding to the partial bandwidth resource switching.
- the terminal determines the target time slot deviation to determine the time slot position for data transmission with the base station. Therefore, not only the terminal needs to determine the target time slot deviation, but also the base station should know the target time slot deviation. In order for the two to perform normal data transmission on the target time domain resource location corresponding to the target time slot deviation, the target time slot deviation determined by the base station and the terminal should be consistent. Therefore, the base station side should also calculate the target time slot offset in the same manner as the terminal side. This requires the base station and the terminal to use the same criteria to determine the handover scenario to which the current partial bandwidth resource switch belongs, and store the same handover scenario and handover duration. The mapping relationship between the two (for example, the base station also stores Table 3), in addition, the base station needs to know the terminal capabilities and the like.
- the terminal may perform data transmission with the target time domain resource location corresponding to the target time slot deviation of the base station.
- the target time slot offset may include an upstream target time slot offset and/or a downstream target time slot offset.
- the terminal may receive the data sent by the base station at the corresponding target time domain resource location, and if the target time slot deviation determined by the terminal is the uplink target time slot deviation, The terminal may send data to the base station at the corresponding target time domain resource location.
- the base station does not need to set the switching dedicated indication line in the time domain resource allocation table specifically for partial bandwidth resource switching, because the terminal can independently use the original partial bandwidth.
- the resource and the target bandwidth resource determine the number of handover time slots required for the current handover, and then calculate the target time slot deviation, thereby avoiding setting a dedicated indication line in the time domain resource allocation table, thereby affecting the time domain resource allocation table for other transmissions.
- the transmission of instructions It also avoids the problem that the time domain resource allocation table always needs to set the switching dedicated indication line in the time domain resource allocation table, thereby wasting the time domain resource allocation table space in the scenario where partial bandwidth resource switching is not required. This is beneficial to optimize resource transmission and improve resource utilization.
- the configuration work is simpler because the base station does not need to care whether the configured transmission time slot satisfies the switching duration of the partial bandwidth resource switching by the terminal when configuring the time domain resource allocation table.
- Embodiment 2 is a diagrammatic representation of Embodiment 1:
- the base station determines the target BWP when performing BWP switching on the BWP that performs data transmission with the terminal.
- the base station may control the terminal to perform partial bandwidth resource switching at some time. For example, before the time t1, the downlink data between the base station and the terminal does not require high bandwidth, but At time t1, the base station needs to send a large amount of video data to the terminal. Therefore, in order to ensure the video viewing experience of the terminal side user, the base station needs to control the terminal to switch to a part of the bandwidth resource with a larger bandwidth value for data transmission. In this case, the base station may select one of the partial bandwidth resources that it has previously configured for the terminal as the target part of the bandwidth resource that satisfies the transmission requirement.
- S404 The base station sends the DCI information to the terminal by using the original BWP to indicate the BWP handover.
- the base station may send the DCI indication information to the terminal, where the DCI indication information may at least perform the indications of the foregoing aspects: first, the DCI information may enable the terminal to determine that part of the bandwidth resource switching is currently required; and the DCI The information also knows which of the target BWPs you need to switch to. In this embodiment, the DCI information can also indicate a basic time slot offset to the terminal. In some examples, the base station may notify the terminal that partial bandwidth resource switching is required by using the BWP indication field in the DCI information. For example, the base station carries the index identifier of the target BWP in the BWP indication field of the DCI information, and after receiving the DCI information, the terminal receives the DCI information.
- the terminal can also determine which of the woodbag BWPs after the handover.
- the basic time slot deviation is specified to the terminal through the time domain resource allocation table and the time domain resource allocation indication field in the first embodiment, and therefore will not be described herein.
- the terminal only performs blind detection on the currently used BWP before the terminal knows that the part of the bandwidth resource needs to be switched. Therefore, in order to ensure that the terminal can receive the DCI information sent by the base station, in this embodiment, the base station passes the original BWP. The transmission of DCI information is performed.
- the base station may calculate the target time domain resource position, that is, the value of the target time slot deviation, and the base station calculates the target time slot deviation.
- the process of calculating the target time slot deviation is the same as that of the terminal. For the specific process, refer to the introduction in the first embodiment, or refer to the following.
- the method for determining the time domain resource on the terminal side is further introduced. Please refer to a flowchart of the time domain resource determining method shown in FIG. 5:
- S502 The terminal performs blind detection on the original BWP.
- the terminal is limited to blind detection of the original BWP, in fact, the terminal does not know whether switching will occur at this time. Therefore, in fact, for the terminal, the so-called original BWP is only the BWP currently in use. Only.
- the terminal can detect the DCI information sent by the base station through the original BWP through blind detection. For details of the blind detection, refer to the introduction in the first embodiment, and details are not described herein again.
- S504 The terminal determines whether the index identifier carried in the DCI information detected by the blind detection is consistent with the index identifier of the original BWP for which the blind detection is performed.
- the terminal After detecting the DCI information, the terminal first determines whether the index carried in the DCI information is consistent with the index of the original BWP for the current blind detection. If yes, it indicates that the partial bandwidth resource switching is not required at present, and the process proceeds to S506. Otherwise, it indicates that the base station has instructed itself to perform partial bandwidth resource switching, and therefore proceeds to S508.
- the terminal is aware of the index of the BWP currently being used.
- the terminal may optionally parse the detected DCI information and obtain the DCI information from the DCT information indicating domain. .
- S506 The basic time slot deviation specified by the DCI information is used as the target time slot deviation.
- the terminal determines that the index carried in the DCI information is consistent with the index of the original BWP, the terminal determines that the partial bandwidth resource switching is not required at present, and therefore can directly combine the time domain resource allocation indication field and the time domain resource allocation table according to the DCI information.
- the terminal may directly use the basic time slot deviation specified by the time domain resource allocation indication field in the time domain resource allocation table as the target time slot deviation.
- the size of the time slot specified in the time domain resource allocation table in this embodiment is referred to as “basic time slot deviation”, and for the scenario where partial bandwidth resource switching is not required, the basic time specified in the DCI is used.
- the slot offset is the target slot offset. Therefore, if the terminal determines that the base station does not indicate partial bandwidth resource switching, the basic slot offset specified by the DCI can be directly referred to as the target slot offset.
- the number of rows in the time domain resource allocation table is related to the number of bits occupied by the time domain resource allocation indication field in the DCI information.
- the time domain resource allocation indication field occupies 3 bits in the DCI information
- the time is
- the domain resource allocation table includes 8 rows, where each row is assigned a unique identifier, which is "0", "1", "2”, ... "7", that is, "0" corresponds to the first row in the table. "1" corresponds to the second row in the table... “7” corresponds to the eighth row in the table.
- the table includes three columns, and the first column is used to indicate the downlink basic time slot deviation/uplink basic time slot deviation, usually the downlink basic time slot deviation and the uplink basic time slot.
- the time domain resource allocation table of the deviation is independent, that is, in the time domain resource allocation table for the downlink, only the downlink basic time slot deviation is configured, and the uplink basic time slot deviation is not carried; likewise, the time domain resource for the uplink is used. In the allocation table, only the uplink basic time slot offset is carried, and the uplink basic time slot offset is not carried.
- the downlink basic time slot deviation is often characterized by "K0", while the uplink basic time slot deviation is often characterized by "K2".
- the second column in the time domain resource allocation table is used to carry the symbol allocation indication information in the time slot, and the third column is used to carry the time domain allocation mapping type.
- the time domain resource allocation table indicates the basic time slot deviation by cooperating with the time domain resource allocation indication field, and the time domain resource allocation indication field carries a unique identifier of a certain row, so the base station wants to specify which row to the terminal.
- the basic time slot deviation can be carried in the time domain resource allocation indication field of the DCI information.
- S508 The terminal determines the target BWP.
- the terminal determines that the index carried in the DCI information is inconsistent with the index of the original BWP, the terminal determines that part of the bandwidth resource switching needs to be performed. Therefore, the terminal can determine which target BWP is based on the index carried in the DCI information, for example, assuming DCI. If the index carried in the message is "d", the target BWP is D.
- S510 The terminal determines a current handover scenario according to the configuration parameters of the target BWP and the original BWP.
- the terminal determines the configuration parameter of the target BWP, and also determines the configuration parameter of the original BWP.
- the terminal side stores the configuration parameters of each BWP configured by the base station. By comparing the configuration parameters between the two BWPs, the terminal can determine the current handover scenario.
- S512 The terminal querying scene-time length mapping relationship table determines the switching duration corresponding to the current switching scenario.
- the terminal can determine the handover duration corresponding to the current bandwidth resource switching scenario by querying the scenario-time mapping table.
- the scenario-time mapping relationship table has been described in detail in the first embodiment. Let me repeat.
- S514 The terminal converts the handover duration into a number of handover slots corresponding to the target BWP.
- the terminal When the terminal converts the handover duration into the number of handover slots, it needs to combine the configuration parameters of the target BWP: the terminal first determines the subcarrier spacing SCS of the target BWP, and then determines the slot length of the slot in the target BWP according to the SCS of the target BWP. . Then calculate how many time slots are included in the switching duration, and here is a formula for calculating the number of switching time slots according to the switching duration:
- the offset indicates the number of handover slots
- T indicates the handover duration queried by the terminal according to the scenario-time length mapping table.
- the corresponding slot length is 1 ms
- the corresponding slot length is 0.5 ms
- the subcarrier spacing is 60 kHz
- the corresponding number of switching time slots can be directly queried according to Table 5. It should be understood that, in order to facilitate the query, the contents of Table 3, Table 4, and Table 5 may be organically combined to obtain a comprehensive table, so that after receiving the transmission indication information, the terminal may directly query according to a table. Determine the number of switching slots.
- S516 The terminal sums the number of handover time slots and the basic time slot deviation specified in the DCI information to obtain a target time slot deviation.
- the terminal may sum the number of handover time slots and the basic time slot deviations queried from the time domain resource allocation table, thereby determining the target time slot deviation, that is, the bandwidth resources in this part.
- the target time domain resource location for data transmission between itself and the base station after handover.
- the time domain resource allocation method and the time domain resource determining method provided by the embodiment when the base station allocates the time domain resource to the terminal, can not only ensure that the terminal has sufficient time for partial bandwidth resource switching, and does not need to be based on the related solution. This brings additional signaling overhead, and can also improve the flexibility of the base station to allocate time domain resources by reducing the concern of the base station when configuring the time domain resource allocation table.
- Embodiment 3 is a diagrammatic representation of Embodiment 3
- the embodiment provides a time domain resource allocation device, and the time domain resource allocation device can be deployed on the base station side to implement the foregoing time domain resource allocation method:
- the time domain resource allocation device 60 includes a handover determining unit 602 and an indication transmission unit 604.
- the handover determining unit 602 is configured to determine a target partial bandwidth resource used for the post-switching transmission when performing partial bandwidth resource switching on a part of the bandwidth resources that perform data transmission with the terminal.
- the indication transmission unit 604 is configured to send, to the terminal, transmission indication information including a target partial bandwidth resource index identifier and time domain resource allocation indication information.
- the index identifier is used by the terminal to determine the target part bandwidth resource, and determines the number of handover time slots required for the partial bandwidth resource switching according to the target part bandwidth resource and the original part bandwidth resource used before the partial bandwidth resource switching, and according to the number of handover time slots.
- the basic time slot deviation determines the target time slot deviation of the data transmission using the target part bandwidth resource, and the basic time slot deviation is determined by the time domain resource allocation indication information.
- the handover determining unit 602 of the time domain resource allocation device 60 can reasonably configure the terminal according to the type of data to be currently transmitted.
- One or more of the partial bandwidth resources are selected for the transmission of the current data to be transmitted.
- part of the bandwidth resources reselected by the base station is different from the part of the bandwidth resources currently being used, part of the bandwidth resource switching needs to be performed. Therefore, the partial bandwidth resource switching actually refers to the "original part bandwidth resource" currently being used. The process of switching to the new "target bandwidth resource".
- the "partial bandwidth resource" referred to in this embodiment actually refers to a continuous RB resource, also referred to as a BWP resource.
- the handover determining unit 602 determines that it needs to switch some of the bandwidth resources used between the terminal and the terminal, it acquires an index identifier of the target portion of the bandwidth resource. For example, the downlink data transmission is to be performed between the base station and the terminal, but the handover determining unit 602 finds that the currently used partial bandwidth resource A is not suitable, and needs to use the partial bandwidth resource C, and the handover determining unit 602 determines that C will be the target partial bandwidth.
- the resource, so the index of the bandwidth resource obtained to the target part is "c".
- the indication transmission unit 604 After the handover determining unit 602 determines the target partial bandwidth resource, the indication transmission unit 604 sends the transmission indication information to the terminal, where the transmission indication information carries the index identifier of the target partial bandwidth resource. In this embodiment, the indication transmission unit 604 will transmit the transmission indication information to the terminal by using the original partial bandwidth resource. Therefore, in some examples, the indication transmission unit 604 will use the partial bandwidth resource A to transmit the transmission indication information.
- the transmission indication information may include, but is not limited to, DCI, ie, downlink control information.
- the basic time slot deviation is used by the terminal side to calculate the handover required for partial bandwidth resource switching.
- the target time slot offset is calculated.
- the indication transmission unit 604 may adopt a time domain resource allocation indication field in the transmission indication information (for example, DCI information) as the time domain resource allocation indication information, and the time domain resource allocation indication field cooperates with the time domain resource allocation table to specify the basic time to the terminal. Gap deviation.
- the terminal may obtain the time domain resource allocation table, and in the time domain resource allocation table, at least two basic time slot deviations may be configured, so that the terminal knows from at least two Which one of the basic time slot deviations is selected, so the base station carries the time domain resource allocation indication field in the DCI information, and the time domain resource allocation indication field can enable the terminal to select a basic time slot designated by the base station from the time domain resource allocation table. deviation. For example, 16 rows are included in the time domain resource allocation table, and these 16 rows are configured basic time slot deviations, and the unique identifiers of the rows in the 16 rows are numbers "0", "1", ... "15", respectively.
- the value corresponding to the time domain resource allocation indication field is “2”, indicating that the basic time slot deviation indicated by the transmission unit 604 for the terminal is in the time domain resource allocation table.
- the time domain resource allocation table is not fixed because it is configured by the base station. Therefore, if the base station configures the time domain resource allocation table differently, the time domain resource allocation table acquired by the terminal is different. . It can be understood that the basic time slot deviation is always determined by using the current time domain resource allocation table, that is, the newly configured time domain resource allocation table, between the indication transmission unit 604 and the terminal.
- the basic time slot deviation is a time domain resource location that is configured by the Radio Resource Control (RRC) layer of the base station and is independent of the switching duration of partial bandwidth resource switching, and can be used not only for partial bandwidth resource switching. Determining the target time slot offset can also be used to determine the target time slot offset when no partial bandwidth resource switching is required. For example, in the process of continuously using a certain part of the bandwidth resource for data transmission between the base station and the terminal, when the transmission unit 604 is allocated to the terminal to allocate the time domain resource, the time domain resource allocation table is also used. In this case, the transmission is indicated. A certain time slot deviation in the time domain resource allocation table specified by unit 604 is actually the target time slot offset.
- RRC Radio Resource Control
- the basic time slot deviation does not need to ensure that the terminal has sufficient switching duration.
- the base station does not need to care whether there is partial bandwidth resource switching, and only needs to be configured according to the usual time domain resource configuration scheme. Therefore, in the embodiment, the basic time slot deviation of the base station is simpler, and the partial bandwidth is not considered in comparison with the target time slot deviation of the dedicated and partial bandwidth resource switching scenarios configured by the base station in the handover specific instruction line. The time limit brought by resource switching.
- the basic time slot deviation includes an uplink basic time slot deviation and/or a downlink basic time slot deviation, wherein the uplink basic time slot deviation corresponds to K2 in the time domain resource allocation table, and the downlink basic time slot deviation Corresponds to K0 in the time domain resource allocation table. If the current base station is to send data to the terminal, and the terminal needs to receive data, the basic time slot deviation specified by the transmission unit 601 to transmit the indication information for the terminal from the time domain resource allocation table should be the downlink basic time slot deviation for the downlink.
- the basic time slot deviation specified by the transmission unit 604 for the terminal by using the time domain resource allocation indication information and the time domain resource allocation table should be the uplink basic time slot deviation for the uplink. , that is, K2.
- time domain resource allocation table in this embodiment is still set in units of partial bandwidth resources, that is, each partial bandwidth resource has a corresponding time domain resource allocation table.
- the function of the handover determining unit 602 can be implemented by the processor of the base station, and the function of the indication transmission unit 604 can be implemented by the processor of the base station and the communication device. .
- the time domain resource allocation apparatus may send the transmission indication information including the target part bandwidth resource index identifier to the terminal by using the original part bandwidth resource used before the handover, and let the terminal determine the target part bandwidth according to the index identifier in the transmission indication information.
- the resource and then determining the number of handover time slots required for the partial bandwidth resource handover according to the target part bandwidth resource and the original part bandwidth resource, and according to the calculated number of handover time slots and the basic time specified by the time domain resource allocation indication information
- the slot offset determines the target slot offset. Therefore, the scheme of switching the dedicated indication line for specifically indicating the partial bandwidth resource switching in the time domain resource allocation table is discarded, which is beneficial to save the space of the time domain resource allocation table, so that the time domain resource allocation table can be carried. More indications of other transmissions.
- the base station since the base station does not need to indicate the target time slot deviation satisfying the handover duration requirement in the time domain resource allocation table, the flexibility of the base station for time domain resource allocation is improved.
- Embodiment 4 is a diagrammatic representation of Embodiment 4:
- the present embodiment provides a time domain resource determining apparatus, which can be deployed on the terminal side to implement the foregoing time domain resource allocation method. Referring to the time domain resource determining apparatus 70 shown in FIG.
- the time domain resource determining means 70 includes a handover determining unit 702 and a target slot determining unit 704.
- the time domain resource determining apparatus 70 may determine, according to the index identifier carried in the transmission indication information, the target partial bandwidth resource used for the transmission after the partial bandwidth resource switching.
- the subsequent handover determining unit 702 can determine the number of handover slots required for the partial bandwidth resource handover according to the target partial bandwidth resource and the original partial bandwidth resource; the target slot determination unit 704 is configured to determine the target partial bandwidth based on the number of handover slots.
- the target time slot deviation of the resource for data transmission is configured to determine the target partial bandwidth based on the number of handover slots.
- the time domain resource determining apparatus 70 may receive the transmission indication information sent by the base station, and determine whether a partial bandwidth resource handover is currently required according to the index identifier carried in the received transmission indication information. For example, a "blind check" can be performed on the original part of the bandwidth resource, and it is assumed that the index of the original part of the bandwidth resource is "a". Through the blind detection, the time domain resource determining apparatus 70 can receive the transmission indication information sent by the base station through the original part of the bandwidth resource A, and the transmission indication information carries the index identifier of the target part of the bandwidth resource.
- the time domain resource determining apparatus 70 may determine whether part of the bandwidth resource switching is currently required, and if the two are consistent, the partial bandwidth is not required. Resource switching; but if the two of the comparison results are inconsistent, the time domain resource determining means 70 determines that the base station has instructed the terminal to switch to another portion of the bandwidth resource for data transmission therewith. In this case, the time domain resource determining means 70 may further determine which of the target partial bandwidth resources indicated by the base station.
- the device 70 can learn that the base station instructs the terminal to perform partial bandwidth resource switching, and the target part of the bandwidth resource used after the handover is C whose index identifier is “c”.
- the time domain resource determining apparatus 70 can not only switch the determining unit 702 and the target time slot determining unit 704, but also include an indication detecting unit 700 for Part of the bandwidth resource performs blind detection to obtain transmission indication information.
- mapping type of the shared channel is usually divided into two types: mapping type one (also called “mapping type A”) and mapping type two (also called “mapping type B").
- mapping type A also called “mapping type A”
- mapping type two also called “mapping type B”
- the base station upper layer adopts mutually independent DMRS configurations for the mapping type A and the mapping type B. That is, the DMRS configuration parameter of the mapping type A may be the same as or different from the DMRS configuration parameter of the mapping type B.
- the type of DMRS in the DMRS configuration parameter (specifically, "DL-DMRS-config-type" in the DMRS configuration parameter) and the maximum length of the DMRS (specifically, may be in the DMRS configuration parameter) DL-DMRS-max-len”) can affect the size of the antenna port field in the transmission indication information sent by the base station to the terminal, and thus affect the size of the transmission indication information.
- the type of the DMRS in the DMRS configuration parameter (specifically, "UL-DMRS-config-type" in the DMRS configuration parameter) and the maximum length of the DMRS (specifically, may be in the DMRS configuration parameter)
- the UL-DMRS-config-type" and the PUSCH-tp enable value can affect the size of the antenna port field in the transmission indication information sent by the base station to the terminal, and affect the size of the transmission indication information.
- the indication detecting unit 700 does not know whether the base station transmits the transmission indication information by using the mapping type A or the transmission type information by using the mapping type B before receiving the transmission indication information sent by the base station, and therefore, the indication detecting unit is 700 cannot determine the size of the antenna port field in the transmission indication information, and thus cannot determine the size of the transmission indication information. In this case, if the detection unit 700 is instructed to perform blind detection, the size of the blind detection is smaller than the size of the transmission indication information transmitted by the base station, and the blind detection fails. After the blind detection fails, the indication detecting unit 700 needs to perform blind detection again in the same time slot, which makes the blind detection complexity increase. In order to solve the problem, the present embodiment provides two solutions:
- the indication detecting unit 700 performs blind detection on the transmission indication information according to the DMRS configuration parameter corresponding to the two mapping types, always in accordance with the maximum size of the antenna port field in the transmission indication information.
- Table 1 has shown the correspondence between the DMRS configuration parameters and the antenna port domain for the downlink shared channel.
- the size of the antenna port indication field is at most 6, for the downlink case, so if the indication detecting unit 700 is indicated, If the transmission indication information is detected according to the antenna port indication field, the transmission indication information can be detected by the indication detecting unit 700 at one time regardless of which mapping type the base station uses to transmit.
- Table 2 has shown the correspondence between the DMRS configuration parameters and the antenna port domain for the uplink shared channel. Therefore, according to Table 2, for the uplink situation, the size of the antenna port indication field is at most 5. Therefore, if the indication detecting unit 700 detects the transmission indication information according to the antenna port indication field, no matter which mapping type the base station adopts. To transmit, the transmission indication information can also be detected by the detection unit 700 at one time.
- the indication detecting unit 700 may also perform blind detection on the transmission indication information according to the mode 2:
- the indication detecting unit 700 separately queries the DMRS configuration parameters corresponding to the mapping type 1 and the mapping type 2, and then determines whether the parameters related to the antenna port domain in the DMRS configuration parameters corresponding to the two mapping types are the same. If they are the same, the indication detecting unit 700 performs blind detection on the transmission indication information according to the size of the antenna port domain corresponding to any one of the two mapping types. If not, the indication detecting unit 700 performs blind detection on the transmission indication information according to a type of the antenna port domain corresponding to the two mapping types.
- the terminal side can obtain the configuration parameters of the shared channel mapping type A and the configuration parameters of the shared channel mapping type B, and the configuration parameters of the shared channel mapping type A.
- the DMRS configuration parameter is included in the configuration parameter of the shared channel mapping type B, so the indication detecting unit 700 can query the DMRS configuration parameter corresponding to the mapping type A and the DMRS configuration parameter corresponding to the mapping type B.
- the parameter related to the antenna port domain refers to a parameter that can affect the size of the antenna port domain.
- the parameters related to the antenna port domain that the indication detecting unit 700 can query include the DMRS type and the DMRS maximum length.
- the parameters related to the antenna port domain that the indication detecting unit 700 can query include the DMRS type, the DMRS maximum length, and the PUSCH-tp enable value.
- the indication detecting unit 700 is not able to determine whether the size of the antenna port field in the transmission indication information sent by the base station is 5 or 4, in order to detect the transmission indication information at a time, the indication detecting unit 700 can directly follow the two mapping types. One of the corresponding antenna port domain sizes is detected, that is, in the above example, the transmission indication information is detected according to the antenna port field of 5.
- the handover determining unit 702 may use the original part of the bandwidth resource and the original part of the bandwidth resource before switching.
- the bandwidth resource determines the number of handover slots required for this partial bandwidth resource handover.
- the handover durations required for all partial bandwidth resource handovers are the same. Even if the target part bandwidth resources are the same, if the handover is performed from different original partial bandwidth resources, the required handover duration may be different. Similarly, Even if the original part of the bandwidth resources are the same, but the target part of the bandwidth resources are different, the required switching time may also be different. Not to mention the switching scenario where the target part of the bandwidth resource is different from the original part of the bandwidth resource. Therefore, different switching scenarios may correspond to different switching durations.
- the handover scenario is mainly determined according to the relationship between the original part of the bandwidth resource and the target part of the bandwidth resource configuration parameter: in a handover scenario, the original part of the bandwidth resource and the target part of the bandwidth resource have the same BW, However, the center frequencies of the two are different. In another handover scenario, the original part of the bandwidth resource has the same center frequency as the target part of the bandwidth resource, but the BWs of the two are different.
- four handover scenarios of partial bandwidth resource switching have been introduced. After the target partial bandwidth resource is determined, the handover determining unit 702 may perform configuration parameters according to the target partial bandwidth resource and configuration parameters of the original partial bandwidth resource. It is determined which of the above several scenarios the current partial bandwidth resource switching scenario belongs to.
- the terminal side stores the configuration parameters of each part of the bandwidth resource.
- the base station may notify the handover determining unit 702 by transmitting the indication information.
- the handover determining unit 702 can determine the current need according to the configuration parameters of the two.
- Part of the bandwidth resource switching belongs to part of the bandwidth resource switching of scenario 1.
- the time domain resource determining apparatus 70 pre-stores the mapping relationship between the switching scenario and the switching duration, and each switching scenario has a switching duration corresponding thereto.
- the handover duration is related not only to the handover scenario, but also to the frequency level of the carrier used by the terminal to communicate with the base station, and the capabilities of the terminal.
- the time domain resource determining apparatus 70 stores the scene-time length mapping relationship table, see Table 3 in the first embodiment.
- the handover determining unit 702 may determine the corresponding switching duration according to the carrier frequency band used by the terminal communication and the capability of the terminal. Assuming that the capability of a certain terminal is high, and the frequency band of the level 1 is used for communication, and the handover determining unit 702 determines that the bandwidth resource switching of the first scenario is to be performed, the handover determining unit 702 queries the table 3 for the current partial bandwidth. Resource switching requires a switchover duration of 600us.
- the handover determining unit 702 determines the handover duration, it is necessary to convert the handover duration into the number of handover slots. It should be understood that the number of handover slots is related not only to the handover duration but also to the subcarrier spacing of the target portion of the bandwidth resource.
- the handover determining unit 702 may first determine the length of the time slot corresponding to the bandwidth part subcarrier interval of the target part, and then calculate the ratio of the switching duration to the length of the single time slot, and round up the ratio to calculate the number of switching time slots. .
- the target slot determining unit 704 may determine, according to the number of the handover slots, a value of the target slot offset when the target portion bandwidth resource is used for data transmission, that is, where the target time domain resource is located. position:
- the transmission indication information sent by the base station to the time domain resource determining apparatus 70 includes time domain resource allocation indication information, and the target time slot determining unit 704 may be based on the time domain resource.
- the allocation indication information is combined with the time domain resource allocation table of the target part bandwidth resource to determine the basic time slot deviation.
- the transmission indication information is described as DCI information: the DCI information includes a time domain resource allocation domain, and the time domain resource allocation domain is used to specify a certain row in the time domain resource allocation table, that is, for the time domain resource. Specify one of the two basic time slot deviations in the allocation table. Then, the target time slot determining unit 704 sums the basic time slot deviation and the number of switching time slots to determine the target time slot deviation corresponding to the partial bandwidth resource switching.
- the target time slot determining unit 704 determines that the target time slot deviation is a slot position for determining data transmission between the terminal and the base station, and therefore, not only the time domain resource determining apparatus 70 on the terminal side needs to determine the target time slot. Deviation, and the base station should also know the target time slot offset. In order for the two to perform normal data transmission on the target time domain resource location corresponding to the target time slot deviation, the target time slot deviation determined by the base station and the target time slot determining unit 704 should be consistent.
- the base station side should also calculate the target time slot offset in the same manner as the terminal side, which requires the base station to use the same criteria as the target time slot determining unit 704 to determine the switching scenario to which the current partial bandwidth resource switch belongs, and store the same
- the mapping relationship between the handover scenario and the handover duration for example, the base station also stores Table 3
- the base station also needs to know the terminal capability and the like.
- the terminal may perform data transmission with the target time domain resource location corresponding to the target time slot deviation of the base station.
- the target time slot offset may include an upstream target time slot offset and/or a downstream target time slot offset.
- the terminal may receive the data transmitted by the base station in the corresponding target time slot deviation if the target time slot deviation determined by the target time slot determining unit 704 If the uplink target time slot is offset, the terminal may send data to the base station in the corresponding target time slot deviation.
- the functions of the time domain resource determining apparatus 70, the handover determining unit 702, and the target slot determining unit 704 in the time domain resource determining apparatus 70 can be implemented by the processor of the terminal.
- the function of the indication detecting unit 700 can be implemented by the processor of the terminal and the communication unit.
- the base station does not need to set the switching dedicated indication line in the time domain resource allocation table specifically for partial bandwidth resource switching, because the time domain resource determining apparatus on the terminal side can according to the original part of the bandwidth.
- the resource and the target bandwidth resource determine the number of handover time slots required for the current handover, and then calculate the target time slot deviation, thereby avoiding setting a dedicated indication line in the time domain resource allocation table, thereby affecting the time domain resource allocation table for other transmissions. Carrying instructions. It also avoids the problem that the time domain resource allocation table always needs to set the switching exclusive indication line in the time domain resource allocation table, thereby wasting the time domain resource allocation table space in the scenario where partial bandwidth resource switching is not required. This is beneficial to optimize resource transmission and improve resource utilization.
- the configuration of the time domain resource allocation table can be made simpler.
- Embodiment 5 is a diagrammatic representation of Embodiment 5:
- the embodiment provides a storage medium in which one or more computer programs that can be read, compiled, and executed by one or more processors can be stored.
- the storage medium can be stored.
- the time domain resource determining program may be configured by one or more processors to perform the steps of implementing any one of the time domain resource determining methods described in the first embodiment and the second embodiment.
- This embodiment further provides a base station. Referring to the hardware structure of the base station shown in FIG.
- the base station 9 includes a first processor 91, a first memory 92, a first communication device 93, and a first communication bus 94.
- the first communication bus 94 is configured to implement a communication connection between the first memory 92, the first communication device 93, and the first processor 91, respectively.
- the first memory 92 may be the foregoing storage medium storing a time domain resource allocation program
- the first processor 91 may read the time domain resource allocation program stored in the first memory 92, compile and execute, at the first communication device 93.
- the steps of implementing any one of the time domain resource allocation methods introduced in Embodiment 1 and Embodiment 2 are implemented in conjunction with:
- the first processor 91 determines the target part of the bandwidth resource used for the transmission after the handover, and controls the original part used by the first communication device 93 before the handover.
- the bandwidth resource sends the transmission indication information including the target part bandwidth resource index identifier to the terminal.
- the index identifier in the transmission indication information may allow the terminal to determine the target part bandwidth resource, determine the number of handover time slots required for the partial bandwidth resource handover according to the target part bandwidth resource and the original part bandwidth resource, and at the same time, the transmission indication information is also carried sometimes
- the domain resource allocation indication information the terminal may determine the basic time slot deviation specified by the base station 9 according to the time domain resource allocation indication information, and then determine the target time slot deviation of the data transmission using the target partial bandwidth resource according to the number of the switched time slots. .
- FIG. 10 provides a hardware structure diagram of the terminal:
- the terminal 1 includes a second processor 11, a second memory 12, a second communication device 13, and a second communication bus for connecting the second processor 11 and the second memory 12, the second processor 11 and the second communication device 13. 14.
- the second memory 12 may be the foregoing storage medium storing the time domain resource determining program.
- the second processor 11 can read the time domain resource determining program stored in the second memory 12, compile and execute, and implement any one of the first embodiment and the second embodiment in cooperation with the second communication device 13. Steps for determining the time domain resource determination method:
- the second communication device 13 may receive the transmission indication information under the control of the second processor 11, and the second processor 11 may determine, according to the transmission indication information received by the second communication device 13, whether partial bandwidth resource switching is required, in determining When the partial bandwidth resource switching needs to be performed, the second processor 11 determines, according to the index identifier carried in the transmission indication information, the target partial bandwidth resource used for the transmission after the partial bandwidth resource switching, and determines the current part according to the target partial bandwidth resource and the original partial bandwidth resource. The number of switching slots required for bandwidth resource switching. Subsequently, the second processor 11 determines a target slot offset for performing data transmission using the target partial bandwidth resource based on the number of handover slots and the basic slot offset specified by the time domain resource allocation indication information in the transmission indication information.
- the base station and the terminal that is, the storage medium provided in this embodiment, allow the terminal to determine the number of handover time slots according to the information provided by the base station, and further determine the target time slot deviation, without relying on the switching exclusive indication line in the time domain resource allocation table. It greatly reduces the occupation of the time domain resource allocation table by part of the bandwidth resource switching, saves the space in the time domain resource allocation table, and provides more transmission opportunities for the indication information of other transmissions, which is beneficial to realizing optimal allocation of resources. .
- time domain resource allocation method and apparatus can be applied not only to the 5G communication system, but also to the 5G communication system. It can also be applied to any communication system in the future.
- modules or steps of the above embodiments of the present invention can be implemented by a general computing device, which can be concentrated on a single computing device or distributed among multiple computing devices.
- they may be implemented by program code executable by the computing device, such that they may be stored in a computer storage medium (ROM/RAM, disk, optical disk) by a computing device, and at some
- the steps shown or described may be performed in an order different than that herein, or they may be separately fabricated into individual integrated circuit modules, or a plurality of modules or steps may be fabricated into a single integrated circuit module. . Therefore, the application is not limited to any particular combination of hardware and software.
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Abstract
Description
DL-DMRS-config-type | DL-DMRS-max-len | 天线指示域的大小 |
1 | 1 | 4 |
1 | 2 | 5 |
2 | 1 | 5 |
2 | 2 | 6 |
UL-DMRS-config-type | UL-DMRS-max-len | PUSCH-tp | 天线指示域的大小 |
1 | 1 | enable | 2 |
1 | 2 | enable | 4 |
1 | 1 | disable | 3 |
1 | 2 | disable | 4 |
2 | 1 | disable | 4 |
2 | 2 | enable | 5 |
u | 子载波间隔(KHz) |
0 | 15 |
1 | 30 |
2 | 60 |
… | … |
Claims (15)
- 一种时域资源确定方法,包括:根据原部分带宽资源以及目标部分带宽资源确定本次部分带宽资源切换所需的切换时隙数目,所述原部分带宽资源、所述目标部分带宽资源分别为终端在本次部分带宽资源切换前、后所使用的部分带宽资源;根据所述切换时隙数目以及基本时隙偏差确定采用所述目标部分带宽资源进行数据传输的目标时隙偏差,所述基本时隙偏差根据基站发送的传输指示信息中携带的时域资源分配指示信息确定。
- 如权利要求1所述的方法,其中,所述根据原部分带宽资源以及目标部分带宽资源确定本次部分带宽资源切换所需的切换时隙数目包括:根据所述原部分带宽资源的配置参数和所述目标部分带宽资源的配置参数确定当前切换场景;根据预先存储的切换场景与切换时长的映射关系确定当前切换场景所对应的切换时长;根据所述切换时长以及所述目标部分带宽资源的配置参数确定本次部分带宽资源切换所需的切换时隙数目。
- 如权利要求2所述的方法,其中,所述目标部分带宽资源的配置参数包括所述目标部分带宽资源的子载波间隔;所述根据所述切换时长以及所述目标部分带宽资源的配置参数确定本次部分带宽资源切换所需的切换时隙数目包括:确定所述目标部分带宽资源的子载波间隔所对应的时隙长度;对所述切换时长与所述时隙长度的比值向上取整得到本次部分带宽资源切换所需的切换时隙数目。
- 如权利要求1所述的方法,其中,所述时域资源分配指示信息包括时域资源分配指示域,所述时域资源分配指示域用于指定时域资源分配表中至少两个基本时隙偏差中的一个;所述根据所述切换时隙数目以及基本时隙偏差确定采用所述目标部分带宽资源进行数据传输的目标时隙偏差之前,还包括:根据所述时域资源分配指示域的指示,从时域资源分配表中确定所述基站指定的基本时隙偏差。
- 如权利要求1所述的方法,在所述根据原部分带宽资源以及目标部分带宽资源确定本次部分带宽资源切换所需的切换时隙数目之前,还包括采用以下两种方式中的任意一种对所述原部分带宽资源进行盲检,获取传输指示信息:方式一:按照所述传输指示信息中天线端口域的大小为最大值的情况对所述传输指示信息进行盲检;方式二:分别查询映射类型一和映射类型二对应的解调参考信号DMRS配置参数;在所述映射类型一和映射类型二对应的DMRS配置参数中与天线端口域相关的参数相同的情况下,按照所述映射类型一和映射类型二中的任意一种对应的天线端口域的大小对所述传输指示信息进行盲检;在所述映射类型一和映射类型二对应的DMRS配置参数中与天线端口域相关的参数不同的情况下,按照两种映射类型对应的天线端口域的大小中较大的一种对所述传输指示信息进行盲检。
- 如权利要求5所述的方法,其中,在当前需要进行数据接收的情况下,所述DMRS配置参数中与天线端口域相关的参数包括:DMRS类型和DMRS最大长度;在当前需要进行数据发送的情况下,所述DMRS配置参数中与天线端口域相关的参数包括:DMRS类型、DMRS最大长度以及PUSCH-tp使能值。
- 如权利要求1-6任一项所述的方法,其中,所述基本时隙偏差包括上行基本时隙偏差或下行基本时隙偏差。
- 如权利要求1-6任一项所述的方法,其中,所述传输指示信息包括下行链路控制信息DCI。
- 一种时域资源分配方法,包括:确定本次部分带宽资源切换后传输所用的目标部分带宽资源;向终端发送包含所述目标部分带宽资源索引标识和时域资源分配指示信息的传输指示信息。
- 如权利要求9所述的方法,其中,所述时域资源分配指示信息包括时域资源分配指示域,所述时域资源分配指示域用于指定时域资源分配表中至少两个基本时隙偏差中的一个。
- 一种时域资源确定装置,包括:切换确定单元,设置为根据原部分带宽资源以及目标部分带宽资源确定本次部分带宽资源切换所需的切换时隙数目,所述原部分带宽资源、所述目标部分带宽资源分别为终端在本次部分带宽资源切换前、后所使用的部分带宽资源;目标时隙确定单元,设置为根据所述切换时隙数目以及基本时隙偏差确定 采用所述目标部分带宽资源进行数据传输的目标时隙偏差,所述基本时隙偏差根据基站发送的传输指示信息中携带的时域资源分配指示信息确定。
- 一种时域资源分配装置,包括:切换确定单元,设置为确定本次部分带宽资源切换后传输所用的目标部分带宽资源;指示传输单元,设置为向终端发送包含所述目标部分带宽资源索引标识和时域资源分配指示信息的传输指示信息。
- 一种基站,包括处理器、存储器、通信装置及通信总线;所述通信总线设置为实现处理器和存储器、所述处理器和所述通信装置的连接通信;所述处理器设置为执行存储器中存储的至少一个程序,以实现如权利要求9或10所述的时域资源分配的方法。
- 一种终端,包括处理器、存储器、通信装置及通信总线;所述通信总线设置为实现处理器和存储器、所述处理器和所述通信装置的连接通信;所述处理器设置为执行存储器中存储的至少一个程序,以实现如权利要求1至8中任一项所述的时域资源确定的方法。
- 一种存储介质,所述存储介质中存储有时域资源分配程序和时域资源确定程序中的至少之一,所述时域资源分配程序可被至少一个处理器执行,以实现如权利要求9或10所述的时域资源分配的方法;所述时域资源确定程序可被至少一个处理器执行,以实现如权利要求1至8中任一项所述的时域资源确定的方法。
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US20230007649A1 (en) | 2023-01-05 |
EP3793290A1 (en) | 2021-03-17 |
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US20210235440A1 (en) | 2021-07-29 |
JP7291155B2 (ja) | 2023-06-14 |
EP3793290A4 (en) | 2022-01-26 |
SG11202011095TA (en) | 2020-12-30 |
CN117939649A (zh) | 2024-04-26 |
US11778622B2 (en) | 2023-10-03 |
US11470590B2 (en) | 2022-10-11 |
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