CN108882368A - A kind of indicating means of the configuration information of frame structure determines method and device - Google Patents
A kind of indicating means of the configuration information of frame structure determines method and device Download PDFInfo
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- CN108882368A CN108882368A CN201710333193.6A CN201710333193A CN108882368A CN 108882368 A CN108882368 A CN 108882368A CN 201710333193 A CN201710333193 A CN 201710333193A CN 108882368 A CN108882368 A CN 108882368A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 78
- 230000002457 bidirectional effect Effects 0.000 claims description 23
- 238000010586 diagram Methods 0.000 description 8
- 230000006978 adaptation Effects 0.000 description 5
- 230000011664 signaling Effects 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
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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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- 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
- H04L5/0008—Wavelet-division
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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
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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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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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
- H04L5/0078—Timing of allocation
- H04L5/0082—Timing of allocation at predetermined intervals
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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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Abstract
The present invention provides a kind of indicating means of the configuration information of frame structure, determines method and device, this method：The instruction information of the protection interval length of target-subframe is sent to terminal；The configuration information that the target-subframe is transmitted on the down control channel of the target-subframe enables the terminal to determine the frame structure of target-subframe according to the configuration information and the instruction information of target-subframe；User can be dynamically determined the inside configuration structure of target-subframe according to its configuration information and protection interval length in method provided in an embodiment of the present invention; can preferably adapt to business transmission characteristic and realize flexible retransmission feedback and link circuit self-adapting process, with lifting system capacity and propagation delay time is reduced.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for indicating and determining configuration information of a frame structure.
Background
In order to better meet service requirements and coverage of various scenes, in the existing TD-LTE, various uplink and downlink allocations are defined to support uplink and downlink services with different allocations, and various special subframe configurations are defined to support different cell coverage areas.
In order to achieve a more flexible frame structure configuration and reduce transmission delay, the 3GPP NR discusses the basic unit of the frame structure. It is determined that a subframe unit may contain a full downlink transmission, a full uplink transmission, or at least one uplink transmission portion and one downlink transmission portion. I.e. there may be 3 sub-frame types: full uplink subframes, full downlink subframes, and bi-directional transmission subframes (there are both uplink and downlink transmissions). The three types of subframes can be flexibly combined to form a frame structure so as to meet the requirements of different service scenes. Compared with LTE, a bidirectional subframe is introduced into 3GPP NR, and by utilizing the bidirectional subframe, a user can quickly realize uplink scheduling transmission and quick feedback of ACK/NACK information, lower transmission delay and a faster link self-adaption process are realized, and system performance is improved. For a bidirectional subframe, in order to avoid uplink and downlink interference, Guard Period (GP) is inserted between the general uplink transmission and the uplink transmission portions, and according to an application scenario and different functions of uplink transmission and downlink transmission, the length and position of the GP and the time lengths of uplink transmission and downlink transmission should be flexibly configured. There may be a variety of flexible configurations of bi-directional subframes. Fig. 1 to 4 respectively show schematic diagrams of several possible bi-directional subframe configurations; wherein, D is an OFDM symbol for downlink transmission, and U is an OFDM symbol for uplink transmission.
In general, the flexible frame structure of the NR can be indicated in a fully flexible dynamic manner or in a semi-static manner. A common fully flexible and dynamic indication method may be: the downlink control part at the beginning of the subframe indicates the time of the downlink duration and the starting position of the uplink transmission. The configuration structure of the subframes is determined by indicating these contents at every subframe. The semi-static indication mode may be similar to LTE, where multiple possible configuration modes are defined for one frame (including multiple subframes) in advance, and then the base station broadcasts the configuration type to the UE. For example, in TD-LTE, 7 uplink and downlink configurations and 9 special subframe configurations are defined. The TD-LTE system informs the UE of the frame structure type by broadcasting uplink and downlink configuration and special subframe configuration [1 ].
At present, the NR frame structure fully flexible dynamic indication method can configure the frame structure fully dynamically, but needs to indicate the downlink duration time and the start position of uplink transmission in the downlink control part starting at each subframe, which results in a large signaling overhead. Taking an example that one subframe includes 14 OFDM symbols, to achieve a fully flexible configuration, 4 bits are required to indicate the downlink duration, and 4 bits indicate the uplink start as a position, and each subframe requires 8 bits of indication information. The semi-static indication method generally has lower signaling indication overhead, because a limited frame structure configuration (uplink and downlink configuration, GP configuration, etc.) is generally determined, and the indication is performed on the limited configuration. However, the semi-static configuration only includes limited uplink and downlink ratios, bidirectional subframe types and subframe combination modes, and may not be able to better match the characteristics of the service and affect the transmission delay.
Disclosure of Invention
The invention aims to provide an indication method, a determination method and a device of configuration information of a frame structure, and solves the problem that a terminal in the prior art cannot accurately determine the downlink and uplink proportion in a bidirectional subframe.
In order to achieve the above object, the present invention provides a method for indicating configuration information of a frame structure, including:
sending indication information of the guard interval length of the target subframe to a terminal;
and transmitting the configuration information of the target subframe on a downlink control channel of the target subframe, so that the terminal can determine the frame structure of the target subframe according to the configuration information of the target subframe and the indication information.
Wherein, the step of sending the indication information of the guard interval length of the target subframe to the terminal comprises:
broadcasting indication information of the guard interval length of the target subframe on a system broadcast channel; or carrying indication information of the guard interval length of the target subframe in system information and sending the system information.
Before the step of sending the indication information of the guard interval length of the target subframe to the terminal, the method further includes:
configuring various guard interval lengths according to the cell coverage requirement, the radio frequency uplink and downlink switching time and/or the requirement of system antenna calibration on the guard interval length.
The step of sending the configuration information of the target subframe to the terminal on a downlink control channel of the target subframe comprises the following steps:
and transmitting the configuration information of the target subframe to a terminal in real time on a downlink control channel of the target subframe.
Wherein the configuration information of the target subframe comprises: a duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or the end position of the guard interval in the target subframe.
The embodiment of the invention also provides a method for determining the frame structure, which comprises the following steps:
acquiring the length of a guard interval of a target subframe, and receiving configuration information of the target subframe on a downlink control channel of the target subframe;
and determining the frame structure of the target subframe according to the configuration information of the target subframe and the length of the guard interval of the target subframe.
Wherein, the step of obtaining the guard interval length of the target subframe comprises:
acquiring indication information of the guard interval length of the target subframe broadcasted by a system broadcast channel; or acquiring indication information of the guard interval length of the target subframe carried in system information;
and determining the length of the guard interval of the target subframe according to the indication information.
Wherein the configuration information of the target subframe comprises: a duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or the end position of the guard interval in the target subframe.
Wherein, the step of determining the frame structure of the target subframe according to the configuration information of the target subframe and the guard interval length of the target subframe comprises:
if the length of the guard interval of the target subframe is equal to 0, determining that the frame structure of the target subframe is a full downlink subframe or a full uplink subframe according to the configuration information of the target subframe;
and if the length of the guard interval of the target subframe is not equal to 0, determining that the frame structure of the target subframe is a bidirectional subframe, and determining the position of uplink transmission and the position of downlink transmission in the bidirectional subframe according to the configuration information of the target subframe.
An embodiment of the present invention further provides an apparatus for indicating configuration information of a frame structure, including:
the interval sending module is used for sending indication information of the length of the guard interval of the target subframe to the terminal;
and the configuration sending module is used for transmitting the configuration information of the target subframe on a downlink control channel of the target subframe, so that the terminal can determine the frame structure of the target subframe according to the configuration information of the target subframe and the indication information.
Wherein the interval transmission module comprises:
a first interval sending submodule, configured to broadcast, on a system broadcast channel, indication information of a guard interval length of the target subframe; or,
and the second interval sending submodule is used for carrying the indication information of the guard interval length of the target subframe in the system information and sending the system information.
Wherein the apparatus further comprises:
and the configuration module is used for configuring various guard interval lengths according to the cell coverage requirement, the radio frequency uplink and downlink switching time and/or the requirement of system antenna calibration on the guard interval length.
Wherein the configuration sending module comprises:
and the configuration sending submodule is used for sending the configuration information of the target subframe to the terminal in real time on a downlink control channel of the target subframe.
Wherein the configuration information of the target subframe comprises: a duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or the end position of the guard interval in the target subframe.
An embodiment of the present invention further provides a device for determining a frame structure, including:
an obtaining module, configured to obtain a guard interval length of a target subframe, and receive configuration information of the target subframe on a downlink control channel of the target subframe;
and the determining module is used for determining the frame structure of the target subframe according to the configuration information of the target subframe and the length of the guard interval of the target subframe.
Wherein the acquisition module comprises:
the first obtaining submodule is used for obtaining indication information of the guard interval length of the target subframe broadcasted by a system broadcast channel; or acquiring indication information of the guard interval length of the target subframe carried in system information;
and the second obtaining submodule is used for determining the length of the guard interval of the target subframe according to the indication information.
Wherein the configuration information of the target subframe comprises: a duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or the end position of the guard interval in the target subframe.
Wherein the determining module comprises:
a first determining submodule, configured to determine, according to the configuration information of the target subframe, that a frame structure of the target subframe is a full downlink subframe or a full uplink subframe if the guard interval length of the target subframe is equal to 0;
and the second determining submodule is used for determining that the frame structure of the target subframe is a bidirectional subframe if the length of the guard interval of the target subframe is not equal to 0, and determining the position of uplink transmission and the position of downlink transmission in the bidirectional subframe according to the configuration information of the target subframe.
The technical scheme of the invention at least has the following beneficial effects:
in the method and device for indicating and determining the configuration information of the frame structure, the base station side configures a plurality of protection interval lengths of a frame in advance and broadcasts the indication information of the protection interval length of the target subframe to a user, and simultaneously dynamically sends the configuration information of the target subframe to the user, so that the user can dynamically determine the internal configuration structure of the target subframe according to the configuration information and the protection interval length of the user, thereby better adapting to the service transmission characteristics and realizing flexible retransmission feedback and link adaptation processes, thereby improving the system capacity and reducing the transmission delay.
Drawings
Fig. 1 shows one of the schematic diagrams of a bidirectional subframe configuration in the prior art;
FIG. 2 is a diagram of a second prior art bi-directional subframe configuration;
FIG. 3 is a third diagram illustrating a bidirectional subframe configuration in the prior art;
FIG. 4 is a diagram illustrating a fourth exemplary bi-directional subframe configuration in the prior art;
fig. 5 is a flowchart illustrating steps of a method for indicating configuration information of a frame structure according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a subframe determined by using an indication method of configuration information of a frame structure according to an embodiment of the present invention;
FIG. 7 is a flow chart illustrating the steps of a method for determining a frame structure according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an apparatus for indicating configuration information of a frame structure according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a frame structure determination apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
As shown in fig. 5, an embodiment of the present invention provides a method for indicating configuration information of a frame structure, which is applied to a base station side (i.e., a network side), and includes:
step 11, sending indication information of the guard interval length of the target subframe to a terminal;
and step 12, transmitting the configuration information of the target subframe on a downlink control channel of the target subframe, so that the terminal can determine the frame structure of the target subframe according to the configuration information of the target subframe and the indication information.
In the above embodiment of the present invention, the base station broadcasts the indication information of the guard interval length of the target subframe, and the terminal can determine the guard interval length of the target subframe according to the indication information; it should be noted that the guard interval length of the target subframe is predefined by the base station. Further, the base station further sends configuration information of the target subframe on a downlink control channel of the target subframe, specifically, the configuration information includes: a duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or the end position of the guard interval in the target subframe.
The user can further determine the position and time length of the uplink transmission according to the duration of the downlink transmission in the downlink control channel and the length of the GP; through the flexible configuration, each subframe can determine that the type of the subframe is a full downlink subframe, a full uplink subframe or a bidirectional subframe and determine the internal configuration structure of the bidirectional subframe, so that the flexible configuration is realized.
Specifically, step 11 in the above embodiment of the present invention includes:
broadcasting indication information of the guard interval length of the target subframe on a system broadcast channel; or carrying indication information of the guard interval length of the target subframe in system information and sending the system information. For example, 1bit indication information is adopted in the system broadcast channel or the system information to indicate the guard interval length; for example, 0 indicates the GP1 is allocated and is 1ofdm symbol long; 1 denotes the arrangement of GP2, with a length of 7ofdm symbols.
It should be noted that, specifically, the indication information of several bits is used to indicate the guard interval length, which may be determined according to the number of the pre-configured guard interval lengths. For example, if 2 kinds of guard interval lengths are configured in advance, the guard interval length is indicated by using 1bit information; for example, if 3 or 4 guard interval lengths are configured in advance, 2-bit information is used to indicate the guard interval length, which is not enumerated here.
In the above embodiment of the present invention, before step 11, the method further includes:
configuring various guard interval lengths according to the cell coverage requirement, the radio frequency uplink and downlink switching time and/or the requirement of system antenna calibration on the guard interval length.
That is, in the above embodiments of the present invention, the GP length configuration is jointly determined according to factors in the cell coverage requirement, the radio frequency uplink/downlink switching time, the GP length requirement of the system antenna calibration, and the like.
Specifically, in the foregoing embodiment of the present invention, step 12 includes:
and transmitting the configuration information of the target subframe to a terminal in real time on a downlink control channel of the target subframe.
In the above embodiment of the present invention, the sending of the configuration information in real time specifically means sending the configuration information of each subframe on the downlink control channel of the subframe; when the configuration information of different subframes is different, the dynamic sending of the configuration information is realized; it should be noted that the configuration information of different subframes may be the same or different, and is not specifically limited herein.
Specifically, the information occupying 4 bits on the downlink control channel indicates the configuration information of the subframe, for example, the configuration information is the duration of downlink transmission, and when the 4-bit information is "1011", it indicates that the duration of downlink transmission of the target subframe is 11 ofdm symbols. This is not an example.
It should be noted that, the configuration information is specifically indicated by using information of several bits, and needs to be determined according to the specific content and length of the configuration information, which is not specifically limited herein.
Examples are as follows:
considering that the subcarrier interval of the system is 15KHz, 1 subframe comprises 14 OFDM symbols, the system has 2 GP length configurations, GP1 occupies 1OFDM symbol (including cyclic prefix length), GP2 occupies 7OFDM symbol (including cyclic prefix length), wherein GP1 can meet the requirement of most coverage of indoor hotspots, dense urban areas, suburban areas and the like, and GP2 can meet the coverage of a larger coverage cell such as 100 Km. The specific signaling notification step may be:
the base station broadcasts GP configuration information of 1bit, wherein, 0 represents configuration GP1, and 1 represents configuration GP 2.
The base station sends 4 bits to indicate the duration of downlink transmission in 1 subframe on the downlink control channel of each subframe. E.g., 1011, indicates that the downlink lasts 11 OFDM symbols in the subframe. When GP1 configuration is adopted, the structure of the subframe is shown in fig. 6, where D is an OFDM symbol for downlink transmission, and U is an OFDM symbol for uplink transmission.
In summary, in the method for indicating configuration information of a frame structure provided in the foregoing embodiment of the present invention, by configuring and broadcasting various guard interval lengths of a frame in advance to a user, and dynamically sending configuration information of a target subframe to the user, the user can dynamically determine an internal configuration structure of the target subframe according to the configuration information and the guard interval length of the target subframe, so as to better adapt to a service transmission characteristic and implement a flexible retransmission feedback and link adaptation process, so as to improve a system capacity and reduce a transmission delay.
As shown in fig. 7, an embodiment of the present invention further provides a method for determining a frame structure, which is applied to a terminal side, and includes:
step 21, obtaining a guard interval length of a target subframe, and receiving configuration information of the target subframe on a downlink control channel of the target subframe;
and step 22, determining the frame structure of the target subframe according to the configuration information of the target subframe and the length of the guard interval of the target subframe.
In the above embodiments of the present invention, the base station defines the configuration of multiple possible guard interval lengths (i.e., GP lengths) in advance, and sends the configured multiple GP lengths to the terminal. And the base station also sends the configuration information of the target subframe on the downlink control channel of the target subframe.
Specifically, step 21 includes:
acquiring indication information of the guard interval length of the target subframe broadcasted by a system broadcast channel; or acquiring indication information of the guard interval length of the target subframe carried in the system information.
And the configuration information of the target subframe comprises: a duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or the end position of the guard interval in the target subframe.
The user can further determine the position and time length of the uplink transmission according to the duration of the downlink transmission in the downlink control channel and the length of the GP; through the flexible configuration, each subframe can determine that the type of the subframe is a full downlink subframe, a full uplink subframe or a bidirectional subframe and determine the internal configuration structure of the bidirectional subframe, so that the flexible configuration is realized.
Specifically, step 22 in the above embodiment of the present invention includes:
if the length of the guard interval of the target subframe is equal to 0, determining that the frame structure of the target subframe is a full downlink subframe or a full uplink subframe according to the configuration information of the target subframe;
and if the length of the guard interval of the target subframe is not equal to 0, determining that the frame structure of the target subframe is a bidirectional subframe, and determining the position of uplink transmission and the position of downlink transmission in the bidirectional subframe according to the configuration information of the target subframe.
In summary, in the method for determining a frame structure provided in the above embodiment of the present invention, a user obtains multiple guard interval lengths of a frame preconfigured by a base station, and receives configuration information of a target subframe sent by the base station at the same time, so that the user can dynamically determine an internal configuration structure of the target subframe according to the configuration information and the guard interval length of the target subframe, so as to better adapt to a service transmission characteristic and implement flexible retransmission feedback and link adaptation processes, so as to improve a system capacity and reduce a transmission delay.
As shown in fig. 8, an embodiment of the present invention further provides an apparatus for indicating configuration information of a frame structure, including:
an interval sending module 31, configured to send, to a terminal, indication information of a guard interval length of a target subframe;
a configuration sending module 32, configured to transmit the configuration information of the target subframe on the downlink control channel of the target subframe, so that the terminal can determine the frame structure of the target subframe according to the configuration information of the target subframe and the indication information.
Specifically, in the foregoing embodiment of the present invention, the interval sending module includes:
a first interval sending submodule, configured to broadcast, on a system broadcast channel, indication information of a guard interval length of the target subframe; or,
and the second interval sending submodule is used for carrying the indication information of the guard interval length of the target subframe in the system information and sending the system information.
Specifically, the apparatus in the above embodiment of the present invention further includes:
and the configuration module is used for configuring various guard interval lengths according to the cell coverage requirement, the radio frequency uplink and downlink switching time and/or the requirement of system antenna calibration on the guard interval length.
Specifically, in the foregoing embodiment of the present invention, the configuration sending module includes:
and the configuration sending submodule is used for sending the configuration information of the target subframe to the terminal in real time on a downlink control channel of the target subframe.
Specifically, in the foregoing embodiment of the present invention, the configuration information of the target subframe includes: a duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or the end position of the guard interval in the target subframe.
In summary, in the indicating apparatus for configuration information of a frame structure provided in the above embodiments of the present invention, by configuring and broadcasting various guard interval lengths of a frame in advance to a user, and dynamically sending configuration information of a target subframe to the user, the user can dynamically determine an internal configuration structure of the target subframe according to the configuration information and the guard interval length of the target subframe, so as to better adapt to service transmission characteristics and implement flexible retransmission feedback and link adaptation processes, so as to improve system capacity and reduce transmission delay.
As shown in fig. 9, an embodiment of the present invention further provides an apparatus for determining a frame structure, including:
an obtaining module 41, configured to obtain a guard interval length of a target subframe, and receive configuration information of the target subframe on a downlink control channel of the target subframe;
a determining module 42, configured to determine a frame structure of the target subframe according to the configuration information of the target subframe and the guard interval length of the target subframe.
Specifically, in the foregoing embodiment of the present invention, the obtaining module includes:
the first obtaining submodule is used for obtaining indication information of the guard interval length of the target subframe broadcasted by a system broadcast channel; or acquiring indication information of the guard interval length of the target subframe carried in system information;
and the second obtaining submodule is used for determining the length of the guard interval of the target subframe according to the indication information.
Specifically, in the foregoing embodiment of the present invention, the configuration information of the target subframe includes: a duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or the end position of the guard interval in the target subframe.
Specifically, in the foregoing embodiment of the present invention, the determining module includes:
a first determining submodule, configured to determine, according to the configuration information of the target subframe, that a frame structure of the target subframe is a full downlink subframe or a full uplink subframe if the guard interval length of the target subframe is equal to 0;
and the second determining submodule is used for determining that the frame structure of the target subframe is a bidirectional subframe if the length of the guard interval of the target subframe is not equal to 0, and determining the position of uplink transmission and the position of downlink transmission in the bidirectional subframe according to the configuration information of the target subframe.
In summary, in the apparatus for determining a frame structure provided in the above embodiment of the present invention, a user obtains multiple guard interval lengths of a frame preconfigured by a base station, and receives configuration information of a target subframe sent by the base station, so that the user can dynamically determine an internal configuration structure of the target subframe according to the configuration information and the guard interval length of the target subframe, so as to better adapt to service transmission characteristics and implement flexible retransmission feedback and link adaptation processes, so as to improve system capacity and reduce transmission delay.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (18)
1. A method for indicating configuration information of a frame structure, comprising:
sending indication information of the guard interval length of the target subframe to a terminal;
and transmitting the configuration information of the target subframe on a downlink control channel of the target subframe, so that the terminal can determine the frame structure of the target subframe according to the configuration information of the target subframe and the indication information.
2. The method according to claim 1, wherein the step of sending the indication information of the guard interval length of the target subframe to the terminal comprises:
broadcasting indication information of the guard interval length of the target subframe on a system broadcast channel; or carrying indication information of the guard interval length of the target subframe in system information and sending the system information.
3. The method of claim 1, wherein before the step of sending the information indicating the guard interval length of the target subframe to the terminal, the method further comprises:
configuring various guard interval lengths according to the cell coverage requirement, the radio frequency uplink and downlink switching time and/or the requirement of system antenna calibration on the guard interval length.
4. The method of claim 1, wherein the step of sending the configuration information of the target subframe to the terminal on a downlink control channel of the target subframe comprises:
and transmitting the configuration information of the target subframe to a terminal in real time on a downlink control channel of the target subframe.
5. The method according to claim 1 or 4, wherein the configuration information of the target subframe comprises: a duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or the end position of the guard interval in the target subframe.
6. A method for determining a frame structure, comprising:
acquiring the length of a guard interval of a target subframe, and receiving configuration information of the target subframe on a downlink control channel of the target subframe;
and determining the frame structure of the target subframe according to the configuration information of the target subframe and the length of the guard interval of the target subframe.
7. The method of claim 6, wherein the step of obtaining the guard interval length of the target subframe comprises:
acquiring indication information of the guard interval length of the target subframe broadcasted by a system broadcast channel; or acquiring indication information of the guard interval length of the target subframe carried in system information;
and determining the length of the guard interval of the target subframe according to the indication information.
8. The method of claim 6, wherein the configuration information of the target subframe comprises: a duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or the end position of the guard interval in the target subframe.
9. The method according to claim 6, wherein the step of determining the frame structure of the target-subframe according to the configuration information of the target-subframe and the guard interval length of the target-subframe comprises:
if the length of the guard interval of the target subframe is equal to 0, determining that the frame structure of the target subframe is a full downlink subframe or a full uplink subframe according to the configuration information of the target subframe;
and if the length of the guard interval of the target subframe is not equal to 0, determining that the frame structure of the target subframe is a bidirectional subframe, and determining the position of uplink transmission and the position of downlink transmission in the bidirectional subframe according to the configuration information of the target subframe.
10. An apparatus for indicating configuration information of a frame structure, comprising:
the interval sending module is used for sending indication information of the length of the guard interval of the target subframe to the terminal;
and the configuration sending module is used for transmitting the configuration information of the target subframe on a downlink control channel of the target subframe, so that the terminal can determine the frame structure of the target subframe according to the configuration information of the target subframe and the indication information.
11. The apparatus of claim 10, wherein the interval transmission module comprises:
a first interval sending submodule, configured to broadcast, on a system broadcast channel, indication information of a guard interval length of the target subframe; or,
and the second interval sending submodule is used for carrying the indication information of the guard interval length of the target subframe in the system information and sending the system information.
12. The apparatus of claim 10, further comprising:
and the configuration module is used for configuring various guard interval lengths according to the cell coverage requirement, the radio frequency uplink and downlink switching time and/or the requirement of system antenna calibration on the guard interval length.
13. The apparatus of claim 10, wherein the configuration sending module comprises:
and the configuration sending submodule is used for sending the configuration information of the target subframe to the terminal in real time on a downlink control channel of the target subframe.
14. The apparatus according to claim 10 or 13, wherein the configuration information of the target subframe comprises: a duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or the end position of the guard interval in the target subframe.
15. An apparatus for determining a frame structure, comprising:
an obtaining module, configured to obtain a guard interval length of a target subframe, and receive configuration information of the target subframe on a downlink control channel of the target subframe;
and the determining module is used for determining the frame structure of the target subframe according to the configuration information of the target subframe and the length of the guard interval of the target subframe.
16. The apparatus of claim 15, wherein the obtaining module comprises:
the first obtaining submodule is used for obtaining indication information of the guard interval length of the target subframe broadcasted by a system broadcast channel; or acquiring indication information of the guard interval length of the target subframe carried in system information;
and the second obtaining submodule is used for determining the length of the guard interval of the target subframe according to the indication information.
17. The apparatus of claim 15, wherein the configuration information of the target subframe comprises: a duration of downlink transmission in the target subframe; or, the starting position of uplink transmission in the target subframe; or, the starting position of the guard interval in the target subframe; or the end position of the guard interval in the target subframe.
18. The apparatus of claim 15, wherein the determining module comprises:
a first determining submodule, configured to determine, according to the configuration information of the target subframe, that a frame structure of the target subframe is a full downlink subframe or a full uplink subframe if the guard interval length of the target subframe is equal to 0;
and the second determining submodule is used for determining that the frame structure of the target subframe is a bidirectional subframe if the length of the guard interval of the target subframe is not equal to 0, and determining the position of uplink transmission and the position of downlink transmission in the bidirectional subframe according to the configuration information of the target subframe.
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