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WO2017140195A1 - Procédé, dispositif et système pour acquérir et retourner une avance temporelle de liaison montante - Google Patents

Procédé, dispositif et système pour acquérir et retourner une avance temporelle de liaison montante Download PDF

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Publication number
WO2017140195A1
WO2017140195A1 PCT/CN2017/071003 CN2017071003W WO2017140195A1 WO 2017140195 A1 WO2017140195 A1 WO 2017140195A1 CN 2017071003 W CN2017071003 W CN 2017071003W WO 2017140195 A1 WO2017140195 A1 WO 2017140195A1
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WO
WIPO (PCT)
Prior art keywords
transmission point
timing advance
terminal
uplink timing
network side
Prior art date
Application number
PCT/CN2017/071003
Other languages
English (en)
Chinese (zh)
Inventor
谌丽
Original Assignee
电信科学技术研究院
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Filing date
Publication date
Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Publication of WO2017140195A1 publication Critical patent/WO2017140195A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0025—Synchronization between nodes synchronizing potentially movable access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
    • H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1221—Wireless traffic scheduling based on age of data to be sent
    • 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

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method, device, and system for acquiring and returning an uplink timing advance.
  • signal transmission passes through an air interface path, and there is a certain delay at the time of reaching the receiving end.
  • the wireless communication system uses a predetermined frame structure for transmission.
  • uplink terminal to network side transmission point
  • multiple terminals have different transmission delays due to different paths during uplink transmission, in order to achieve timing of the transmitting end and the receiving end.
  • the relationship is consistent, so that the uplink transmissions of different terminals from the same cell do not interfere with each other, and the transmitting end needs to have a certain timing advance.
  • 1 is a schematic diagram of an uplink timing advance. As shown in the figure, in order for a base station to receive uplink transmission at time T0, terminal 1 needs to transmit uplink transmission with timing advance TA1, and terminal 2 needs to transmit uplink transmission with timing advance TA2.
  • the base station side estimates the timing advance (Timing Advance, TA) required by the terminal for uplink transmission by measuring the uplink signal or uplink transmission of the terminal, and passes the time advance command (Timing Advance Command).
  • TAC Timing Advance Command
  • TAT Timing Alignment Timer
  • the disadvantage of the prior art is that when the terminal selects a suitable transmission point for transmission, if the transmission point selected by the terminal does not have any data or signaling transmission with the terminal at the last moment, the LTE system actively measures and notifies the base station. The way in which the terminal uplink timing advance is no longer feasible.
  • the present invention provides a method, apparatus, and system for acquiring and returning an uplink timing advance amount, which are used to provide a scheme for a terminal to acquire an uplink timing advance amount when a terminal selects an appropriate transmission point for transmission.
  • a method for obtaining an uplink timing advance amount is provided in the embodiment of the present invention, including:
  • the uplink timing advance amount required for the terminal to transmit data to the target transmission point is determined according to the message returned by the network side carrying the uplink timing advance amount.
  • the request for acquiring the uplink timing advance is initiated to the network side
  • the request is initiated to one of the following network side entities:
  • each transmission point that performs data transmission with the terminal is grouped, including one or a combination of the following:
  • the transmission point After determining, by the network side, the transmission point that may be used for data transmission with the terminal, the transmission point is grouped according to the uplink timing advance required for data transmission between the terminal and each transmission point;
  • the transmission point After the terminal feeds back to the network side a transmission point that may be transmitted with the terminal, the transmission point is grouped according to the uplink timing advance required for the data transmission by the terminal and each transmission point;
  • the terminal searches for possible transmission points in the current area, measures downlink signals of each transmission point, and estimates the uplink timing advance according to the downlink signal, and then performs grouping.
  • the method further comprises one or a combination of the following:
  • the timing advance timer After receiving the message carrying the uplink timing advance amount returned by the network side, the timing advance timer is started, and when the new timing advance is received, the timing advance timer is restarted, and when the timing advance timer expires, the uplink timing is initiated. Advance request;
  • the timing advance amount is adjusted according to the distance from the target transmission point
  • a request to acquire an uplink timing advance is initiated when a transmission characteristic change of the target transmission point or a target transmission point is changed.
  • the timing advance timer is: a timing advance timer received from the network side, or a timing advance timer specified by a protocol, or a timing advance timer built in the terminal.
  • a method for returning an uplink timing advance including:
  • the terminal Receiving, by the terminal, a request for acquiring an uplink timing advance amount to the network side, where the uplink timing advance amount is an uplink timing advance amount required for the terminal to transmit data to the target transmission point;
  • a message carrying the uplink timing advance is returned to the terminal.
  • the receiving terminal requests the network timing to obtain the uplink timing advance amount, it is received by one of the following network side entities:
  • each transmission point that performs data transmission with the terminal is grouped, including one or a combination of the following:
  • the transmission point After determining, by the network side, the transmission point that may be used for data transmission with the terminal, the transmission point is grouped according to the uplink timing advance required for data transmission between the terminal and each transmission point;
  • the transmission point After the terminal feeds back to the network side a transmission point that may be transmitted with the terminal, the transmission point is grouped according to the uplink timing advance required for the data transmission by the terminal and each transmission point;
  • the terminal searches for possible transmission points in the current area, measures downlink signals of each transmission point, and estimates the uplink timing advance according to the downlink signal, and then performs grouping.
  • the current transmission point determines the terminal direction through the target transmission point.
  • the method further includes: returning, to the terminal, a message carrying the effective duration of the uplink timing advance.
  • determining an uplink timing advance required by the terminal to transmit data to the target transmission point includes one or a combination of the following manners:
  • the network side device that receives the request for obtaining the uplink timing advance is the target transmission point, determining the measured value according to the uplink reference signal or the uplink transmission signal sent by the terminal;
  • the network side device receiving the acquisition uplink timing advance request is not the target transmission point, according to the timing advance of the terminal to the current transmission point, the distance from the target transmission point to the terminal or the target transmission point to the current transmission point, and the target transmission One of the transmission frequencies of the points or a combination thereof is determined, wherein the current transmission point is a network side device that receives the request for acquiring the uplink timing advance amount.
  • the method further includes: determining, after the network side determines the uplink timing advance amount change, determining the changed uplink timing advance amount;
  • the uplink timing advance after the change is enabled with the terminal, and the timing advance timer is restarted.
  • An apparatus for obtaining an uplink timing advance is provided in the embodiment of the present invention, including:
  • a transmission point determining module configured to determine a target transmission point at which the terminal needs to transmit data
  • a requesting module configured to initiate a request for acquiring an uplink timing advance amount to the network side, where the uplink timing advance amount is the The uplink timing advance required by the terminal to transmit data to the target transmission point;
  • the advance quantity determining module is configured to determine, according to the message returned by the network side that carries the uplink timing advance quantity, an uplink timing advance quantity required for the terminal to transmit data to the target transmission point.
  • the requesting module is further configured to initiate a request for acquiring an uplink timing advance amount to one of the following network side entities:
  • the requesting module is further configured to: when the request for acquiring the uplink timing advance is initiated to the transmission point belonging to the same group as the target transmission point, the group is grouped in a manner including one of the following manners or a combination thereof:
  • the transmission point After determining, by the network side, the transmission point that may be used for data transmission with the terminal, the transmission point is grouped according to the uplink timing advance required for data transmission between the terminal and each transmission point;
  • the transmission point After the terminal feeds back to the network side a transmission point that may be transmitted with the terminal, the transmission point is grouped according to the uplink timing advance required for the data transmission by the terminal and each transmission point;
  • the terminal searches for possible transmission points in the current area, measures downlink signals of each transmission point, and estimates the uplink timing advance according to the downlink signal, and then performs grouping.
  • the method further includes: a maintenance module, configured to maintain an uplink timing advance in one of the following manners or a combination thereof:
  • the timing advance timer After receiving the message carrying the uplink timing advance amount returned by the network side, the timing advance timer is started, and when the new timing advance is received, the timing advance timer is restarted, and when the timing advance timer expires, the uplink timing is initiated. Advance request;
  • the timing advance amount is adjusted according to the distance from the target transmission point
  • a request to acquire an uplink timing advance is initiated when a transmission characteristic change of the target transmission point or a target transmission point is changed.
  • the timing advance timer is: a timing advance timer received from the network side, or a timing advance timer specified by a protocol, or a timing advance timer built in the terminal.
  • a system for returning an uplink timing advance including:
  • the receiving module is configured to receive, by the terminal, a request for acquiring an uplink timing advance amount that is sent by the terminal to the network side, where the uplink timing advance quantity is an uplink timing advance amount required for the terminal to transmit data to the target transmission point;
  • a determining module configured to determine an uplink timing advance required by the terminal to transmit data to the target transmission point
  • a returning module configured to return, to the terminal, a message carrying the uplink timing advance amount.
  • the receiving module is located in one of the following network side entities:
  • the method further includes: a grouping module, configured to group, according to one of the following manners or a combination thereof, each transmission point that performs data transmission with the terminal:
  • the transmission point After determining, by the network side, the transmission point that may be used for data transmission with the terminal, the transmission point is grouped according to the uplink timing advance required for data transmission between the terminal and each transmission point;
  • the transmission point After the terminal feeds back to the network side a transmission point that may be transmitted with the terminal, the transmission point is grouped according to the uplink timing advance required for the data transmission by the terminal and each transmission point;
  • the terminal searches for possible transmission points in the current area, measures downlink signals of each transmission point, and estimates the uplink timing advance according to the downlink signal, and then performs grouping.
  • the determining module is located at the current transmission point, and further configured to determine, by the target transmission point, an uplink timing required for the terminal to transmit data to the target transmission point when the receiving module is located at the target transmission point, and the returning module is located at the current transmission point. Advance quantity.
  • the returning module is further configured to return, to the terminal, a message carrying the effective duration of the uplink timing advance.
  • the determining module is further configured to determine an uplink timing advance required by the terminal to transmit data to the target transmission point in one or a combination of the following manners:
  • the network side device that receives the request for obtaining the uplink timing advance is the target transmission point, determining the measured value according to the uplink reference signal or the uplink transmission signal sent by the terminal;
  • the network side device receiving the acquisition uplink timing advance request is not the target transmission point, according to the timing advance of the terminal to the current transmission point, the distance from the target transmission point to the terminal or the target transmission point to the current transmission point, and the target transmission One of the transmission frequencies of the points or a combination thereof is determined, wherein the current transmission point is a network side device that receives the request for acquiring the uplink timing advance amount.
  • the method further includes: an updating module, configured to determine, after the network side determines the uplink timing advance amount, the changed uplink timing advance amount; send the uplink timing advance amount command to the terminal; and the uplink timing advance after the terminal is enabled to be changed Quantity, and restart the timing advance timer.
  • an updating module configured to determine, after the network side determines the uplink timing advance amount, the changed uplink timing advance amount; send the uplink timing advance amount command to the terminal; and the uplink timing advance after the terminal is enabled to be changed Quantity, and restart the timing advance timer.
  • a device for obtaining an uplink timing advance comprising:
  • a processor for reading a program in the memory performing the following process:
  • a transceiver for receiving and transmitting data under the control of a processor, performing the following processes:
  • the message returned by the network side carrying the uplink timing advance amount is received.
  • the transceiver is initiated to one of the following network side entities:
  • the processor when grouping the transmission points for data transmission with the terminal, the processor adopts one of the following methods or a combination thereof:
  • the transmission point After determining, by the network side, the transmission point that may be used for data transmission with the terminal, the transmission point is grouped according to the uplink timing advance required for data transmission between the terminal and each transmission point;
  • the transmission point After the terminal feeds back to the network side a transmission point that may be transmitted with the terminal, the transmission point is grouped according to the uplink timing advance required for the data transmission by the terminal and each transmission point;
  • the terminal searches for possible transmission points in the current area, measures downlink signals of each transmission point, and estimates the uplink timing advance according to the downlink signal, and then performs grouping.
  • the transceiver further performs one or a combination of the following:
  • the timing advance timer After receiving the message carrying the uplink timing advance amount returned by the network side, the timing advance timer is started, and when the new timing advance is received, the timing advance timer is restarted, and when the timing advance timer expires, the uplink timing is initiated. Advance request;
  • the timing advance amount is adjusted according to the distance from the target transmission point
  • a request to acquire an uplink timing advance is initiated when a transmission characteristic change of the target transmission point or a target transmission point is changed.
  • the timing advance timer is: a timing advance timer received from the network side, or a timing advance timer specified by a protocol, or a timing advance timer built in the terminal.
  • a device for returning an uplink timing advance comprising:
  • a processor for reading a program in the memory performing the following process:
  • a transceiver for receiving and transmitting data under the control of a processor, performing the following processes:
  • the terminal Receiving, by the terminal, a request for acquiring an uplink timing advance amount to the network side, where the uplink timing advance amount is an uplink timing advance amount required for the terminal to transmit data to the target transmission point;
  • a message carrying the uplink timing advance is returned to the terminal.
  • the transceiver is received by one of the following network side entities:
  • the processor when grouping the transmission points for data transmission with the terminal, the processor adopts one of the following methods or a combination thereof:
  • the transmission point After determining, by the network side, the transmission point that may be used for data transmission with the terminal, the transmission point is grouped according to the uplink timing advance required for data transmission between the terminal and each transmission point;
  • the transmission point After the terminal feeds back to the network side a transmission point that may be transmitted with the terminal, the transmission point is grouped according to the uplink timing advance required for the data transmission by the terminal and each transmission point;
  • the terminal searches for possible transmission points in the current area, measures downlink signals of each transmission point, and estimates the uplink timing advance according to the downlink signal, and then performs grouping.
  • the current transmission point determines the terminal direction through the target transmission point.
  • the transceiver is further used to:
  • the processor when determining the uplink timing advance required by the terminal to transmit data to the target transmission point, the processor adopts one of the following methods or a combination thereof:
  • the network side device that receives the request for obtaining the uplink timing advance is the target transmission point, determining the measured value according to the uplink reference signal or the uplink transmission signal sent by the terminal;
  • the network side device receiving the acquisition uplink timing advance request is not the target transmission point, according to the timing advance of the terminal to the current transmission point, the distance from the target transmission point to the terminal or the target transmission point to the current transmission point, and the target transmission One of the transmission frequencies of the points or a combination thereof is determined, wherein the current transmission point is a network side device that receives the request for acquiring the uplink timing advance amount.
  • the processor is further configured to:
  • the uplink timing advance after the change is enabled with the terminal, and the timing advance timer is restarted.
  • the terminal side after determining the target transmission point that the terminal needs to transmit data, the terminal side initiates a request for acquiring the uplink timing advance amount to the network side, and determines the required uplink according to the message returned by the network side. Timing advance.
  • the scheme is adopted.
  • the uplink timing advance of the transmission point can also be obtained, so that the terminal can effectively implement the uplink transmission when the terminal flexibly selects the transmission point.
  • 1 is a schematic diagram of an uplink timing advance amount in the background art
  • FIG. 2 is a schematic flowchart of a method for implementing an uplink timing advance amount on a terminal side according to an embodiment of the present disclosure
  • FIG. 3 is a schematic flowchart of a method for implementing a method for returning an uplink timing advance by a network side according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of grouping of timing advance amounts according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of Embodiment 1 of an embodiment for acquiring a timing advance by a terminal according to an embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart of Embodiment 2 of a second embodiment of acquiring a timing advance by a terminal according to an embodiment of the present disclosure
  • FIG. 7 is a schematic flowchart of Embodiment 3 of a method for acquiring a timing advance by a terminal according to an embodiment of the present disclosure
  • FIG. 8 is a schematic structural diagram of an apparatus for acquiring an uplink timing advance amount according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a system for returning an uplink timing advance amount according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a network side device according to an embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • Universal Mobile Telecommunication System Universal Mobile Telecommunication System, UMTS
  • the user equipment includes but is not limited to a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile phone (Mobile Telephone), a mobile phone (handset). And portable devices, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular"
  • RAN Radio Access Network
  • the user equipment can be a mobile phone (or "cellular"
  • the telephone device, the computer with wireless communication function, etc., the user equipment can also be a mobile device that is portable, pocket-sized, handheld, built-in, or in-vehicle.
  • a base station may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the invention is not limited.
  • BTS Base Transceiver Station
  • NodeB base station
  • NodeB evolved base station
  • LTE Long Term Evolutional Node B
  • Future wireless communication systems are end-to-end ecosystems that include a variety of devices. Need to have higher performance than 4G, support 0.1 to 1 Gbps user experience rate, one million connection density per square kilometer, millisecond end-to-end delay, tens of Tbps per square kilometer, per hour Mobility above 500Km and peak rate of tens of Gbps. Future wireless communication A variety of wireless communication systems coexist in large numbers, and terminals can simultaneously maintain communication connections and transmissions with different wireless communication systems or multiple transmission points under the same wireless communication system. Different transmission point locations are different from the network side of the wireless transmission with the terminal, the frequency is different, and the uplink timing advance is also different.
  • the terminal selects a suitable transmission point for transmission, and the transmission point selected by the terminal is likely to have no data or signaling transmission with the terminal at the last moment, therefore, the LTE system
  • the manner in which the base station actively measures and informs the terminal of the uplink timing advance is no longer feasible.
  • the network side transmission point is selected by the terminal, and the process of acquiring the uplink timing advance amount is initiated to the network side as needed.
  • the timing advance of the terminal to the target transmission point is estimated, and the timing advance amount information is notified to the terminal. The details will be described below.
  • the implementations from the terminal side and the network side will be respectively described.
  • the terminal side will mainly explain the acquisition process
  • the network side will mainly describe the process of returning the uplink timing advance amount, and then the two will be implemented together. Examples for better understanding of the implementation of the solutions presented in the embodiments of the invention. This way of explanation does not mean that the two must It must be implemented together or must be implemented separately.
  • the terminal side and the network side are implemented separately, they also solve the problems of the terminal side and the network side respectively, and when the two are used in combination, a better technical effect is obtained.
  • FIG. 2 is a schematic flowchart of a method for implementing an uplink timing advance on a terminal side, as shown in the figure, which may include:
  • Step 201 Determine a target transmission point that the terminal needs to transmit data.
  • Step 202 Initiate a request for acquiring an uplink timing advance amount to the network side, where the uplink timing advance amount is an uplink timing advance amount required by the terminal to transmit data to the target transmission point;
  • Step 203 Determine, according to the message that the uplink timing is returned by the network side, the uplink timing advance amount required for the terminal to transmit data to the target transmission point.
  • FIG. 3 is a schematic flowchart of a method for implementing a method for returning an uplink timing advance on a network side, as shown in the figure, which may include:
  • Step 301 The request for acquiring an uplink timing advance quantity initiated by the terminal to the network side, where the uplink timing advance quantity is an uplink timing advance quantity required for the terminal to transmit data to the target transmission point;
  • Step 302 Determine an uplink timing advance amount required for the terminal to transmit data to the target transmission point.
  • Step 303 Return, to the terminal, a message carrying the uplink timing advance amount.
  • the terminal that initiates the request for obtaining the uplink timing advance amount to the network side is the terminal, and correspondingly, when the receiving terminal requests the network timing side to obtain the uplink timing advance amount, it is received by one of the following network side entities:
  • TRP Transmission Reception Point
  • the transmission point may have different uplink timing advances. .
  • transmission points with the same timing advance can be grouped into one group.
  • TRP1 is a low-frequency wide coverage transmission point and belongs to the TA group. 1; TRP2 and TRP3 have the same timing advance and belong to TA group 2; TRP4 and TRP5 have the same timing advance and belong to TA group 3.
  • the terminal In a TA group, the terminal only needs to maintain uplink synchronization with one transmission point to achieve uplink synchronization for all transmission points in the TA group.
  • grouping each transmission point that performs data transmission with the terminal may include one or a combination of the following:
  • the transmission point After determining the transmission point that may be used for data transmission with the terminal in the network side, the transmission point is grouped according to the uplink timing advance required for data transmission between the terminal and each transmission point.
  • the network side performs TA group division on the transmission point that may be transmitted with the terminal in a certain area, and notifies the terminal, and the notification mode is unicast to notify a single terminal or broadcast the terminals in all areas in the area.
  • the transmission point After the terminal feeds back to the network side a transmission point that may be transmitted with the terminal, the transmission point is grouped according to the uplink timing advance required for data transmission by the terminal and each transmission point.
  • the terminal searches for possible transmission points in the current area, and feeds back a list of possible transmission points to the current transmission point, and the network side performs TA group according to the possible transmission point list, and notifies the terminal.
  • the terminal searches for possible transmission points in the current area, measures downlink signals of each transmission point, and estimates the uplink timing advance according to the downlink signal, and then performs grouping.
  • the terminal searches for a possible transmission point in the current area, measures a downlink signal of the transmission point, and estimates an uplink transmission characteristic according to the downlink signal, and performs a TA packet, where the terminal can maintain the TA packet.
  • the terminal acquires the timing advance of the transmission point by using an example for the network side entity (the target transmission point, the current transmission point, and the transmission point belonging to the same group as the target transmission point).
  • the network side entity the target transmission point, the current transmission point, and the transmission point belonging to the same group as the target transmission point.
  • it may further include:
  • a message carrying the effective duration of the uplink timing advance is returned to the terminal.
  • Step 1 The terminal selects the target transmission point, and confirms whether there is a timing advance amount of the target transmission point (or the TA group to which the target transmission point belongs). If not, the timing of acquiring the target transmission point (or the target transmission point TA group) is initiated to the network side.
  • the process of the advance quantity may specifically be sending a request message at the current transmission point, where the request message carries a target transmission point transmission point number (TRP ID) or a transmission point group number (TAG ID);
  • Step 2 The current transmission point receives the request message, and the network side estimates the timing advance amount of the terminal to the target transmission point (or the target transmission point TA group);
  • Step 3 The timing advance information of the terminal to the target transmission point is sent to the terminal by the current transmission point.
  • the timing advance time effective TAT may be simultaneously transmitted.
  • Step 1 The terminal selects the target transmission point, and confirms whether there is a timing advance amount of the target transmission point (or the TA group to which the target transmission point belongs). If not, the timing of acquiring the target transmission point (or the target transmission point TA group) is initiated to the network side.
  • the process of the advance quantity specifically sending the uplink sounding signal to the other transmission point of the TA group to which the target transmission point or the target transmission point belongs;
  • Step 2 The other transmission point of the TA group to which the target transmission point or the target transmission point belongs receives the uplink detection signal sent by the terminal, and calculates the uplink timing advance amount according to the detection signal;
  • Step 3 The other transmission point or the current transmission point of the TA group belonging to the target transmission point or the target transmission point will be the terminal to
  • the timing advance information of the target transmission point is sent to the terminal, and optionally, the timing advance effective time length TAT can be simultaneously transmitted.
  • the timing advance of the terminal to the target transmission point can be estimated in the following manners.
  • determining an uplink timing advance required for the terminal to transmit data to the target transmission point may include one or a combination of the following:
  • the measured value is determined according to the uplink reference signal or the uplink transmission signal sent by the terminal.
  • the target transmission point receives the uplink reference signal or the uplink transmission sent by the terminal and performs measurement, and obtains the timing advance amount according to the measured value.
  • the network side device receiving the acquisition uplink timing advance request is not the target transmission point, according to the timing advance of the terminal to the current transmission point, the distance from the target transmission point to the terminal or the target transmission point to the current transmission point, and the target transmission One of the transmission frequencies of the points or a combination thereof is determined, wherein the current transmission point is a network side device that receives the request for acquiring the uplink timing advance amount.
  • the network side estimates the timing advance of the terminal to the target transmission point according to the timing advance of the terminal to the current transmission point, the distance from the target transmission point to the terminal or the current transmission point, and the transmission frequency of the target transmission point.
  • timing advance may change, such as terminal location change, target TRP location change, target TRP change, and TAT timeout
  • a timing advance update is required. The implementation of the maintenance of the timing advance will be described below with reference to an example.
  • the terminal when the terminal performs maintenance on the received target transmission point timing advance, the terminal may further include one or a combination of the following modes:
  • the timing advance timer After receiving the message carrying the uplink timing advance amount returned by the network side, the timing advance timer is started, and when the new timing advance is received, the timing advance timer is restarted, and when the timing advance timer expires, the uplink timing is initiated. Advance request;
  • the timing advance timer may be: a timing advance timer received from the network side, or a timing advance timer specified by a protocol, or a timing advance timer built in the terminal.
  • the TAT is received from the network side or the TAT is set by the protocol or built in the terminal.
  • the TAT is started.
  • the TAT is restarted. If the TAT expires, the timing advance is invalid and needs to be re-acquired.
  • the timing advance amount is adjusted according to the distance from the target transmission point
  • the timing advance acquisition process is restarted.
  • terminal side trigger timing advance update is described below by way of example.
  • Step 1 The terminal side determines that the TA update needs to be performed, and the trigger condition is the terminal location change, the target TRP change, and the TAT timeout;
  • Step 2 The terminal initiates a timing advance acquisition process and updates the currently stored timing advance and the TA timer.
  • the method when the network side performs maintenance on the received timing advance timing of the target transmission point, the method further includes:
  • the uplink timing advance after the change is enabled with the terminal, and the timing advance timer is restarted.
  • the implementation of the network side trigger timing advance update is described below by way of example.
  • Step 1 The network side determines the TA change and calculates a new TA value.
  • the trigger condition is that the target TRP position is changed, or the TAT is timed out, or the uplink signal or transmission of the measurement terminal is changed by the TA value;
  • Step 2 The current TRP or the target TRP generates a new TA command to the terminal, and the TAT is restarted when the network side and the terminal apply the new TA value.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 5 is a schematic flowchart of Embodiment 1 of a method for acquiring a timing advance by a terminal, as shown in the figure, which may include:
  • Step 501 The terminal sends a request message for acquiring the TA to the current TRP.
  • the terminal selects the target transmission point, and confirms whether there is a timing advance amount of the target transmission point (or the TA group to which the target transmission point belongs), and if not, initiates the timing of acquiring the target transmission point (or the target transmission point TA group) to the network side.
  • the process of the advance quantity is specifically sending a request message at the current transmission point, where the request message carries a target transmission point transmission point number (TRP ID) or a transmission point group number (TAG ID).
  • Step 502 The network side estimates the TA value of the target TRP.
  • the current transmission point receives the request message, and the network side estimates the timing advance of the terminal to the target transmission point (or the target transmission point TA group).
  • Step 503 The current TRP sends the TA value of the target TRP to the terminal.
  • the timing advance information of the terminal to the target transmission point is sent to the terminal by the current transmission point.
  • the timing advance amount effective duration TAT may be simultaneously transmitted.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • FIG. 6 is a schematic flowchart of Embodiment 2 of the method for acquiring a timing advance by a terminal, as shown in the figure, which may include:
  • Step 601 The terminal sends a sounding signal to the target TRP.
  • the terminal selects the target transmission point, and confirms whether there is a timing advance amount of the target transmission point (or the TA group to which the target transmission point belongs), and if not, initiates the timing of acquiring the target transmission point (or the target transmission point TA group) to the network side.
  • Lift The process of the pre-quantity may specifically be to send an uplink sounding signal to other target transmission points of the TA group to which the target transmission point or the target transmission point belongs.
  • Step 602 The target TRP calculates a TA value.
  • the target transmission point or the other target transmission point of the TA group to which the target transmission point belongs receives the uplink sounding signal sent by the terminal, and calculates the uplink timing advance amount according to the sounding signal.
  • Step 603 The target TRP sends the TA value of the target TRP to the terminal.
  • the timing advance information of the terminal to the target transmission point is sent to the terminal by the target transmission point or other target transmission point of the TA group to which the target transmission point belongs.
  • the timing advance effective time length TAT may be simultaneously transmitted.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • FIG. 7 is a schematic flowchart of Embodiment 3 of a method for acquiring a timing advance by a terminal, as shown in the figure, which may include:
  • Step 701 The terminal sends a sounding signal to the target TRP.
  • the terminal selects the target transmission point, and confirms whether there is a timing advance amount of the target transmission point (or the TA group to which the target transmission point belongs), and if not, initiates the timing of acquiring the target transmission point (or the target transmission point TA group) to the network side.
  • the process of the advance quantity may specifically be to send an uplink sounding signal to the target transmission point or other target transmission point of the TA group to which the target transmission point belongs.
  • Step 702 The target TRP calculates a TA value.
  • the target transmission point or the other target transmission point of the TA group to which the target transmission point belongs receives the uplink sounding signal sent by the terminal, and calculates the uplink timing advance amount according to the sounding signal.
  • Step 703 The current TRP acquires the TA value.
  • the target transmission point (or the transmission point of the target transmission point group) interacts with the current TRP with TA and TAT information.
  • Step 704 The current TRP sends the TA value of the target TRP to the terminal.
  • the timing advance information of the terminal to the target transmission point is sent to the terminal by the current transmission point.
  • the timing advance amount effective duration TAT may be simultaneously transmitted.
  • the embodiment of the present invention further provides a device for acquiring an uplink timing advance amount, a system for returning an uplink timing advance amount, a principle for solving the problem by the devices, and a method for acquiring an uplink timing advance amount.
  • a method for returning the uplink timing advance is similar, so the implementation of these devices can be referred to the implementation of the method, and the repeated description will not be repeated.
  • FIG. 8 is a schematic structural diagram of an apparatus for acquiring an uplink timing advance amount, as shown in the figure, which may include:
  • a transmission point determining module 801 configured to determine a target transmission point that the terminal needs to transmit data
  • the requesting module 802 is configured to initiate, to the network side, a request for acquiring an uplink timing advance amount, where the uplink timing advance amount is an uplink timing advance amount required by the terminal to transmit data to the target transmission point;
  • the advancement determining module 803 is configured to determine, according to the message that the uplink timing is returned by the network side, the uplink timing advance required by the terminal to transmit data to the target transmission point.
  • the requesting module is further configured to initiate a request for acquiring an uplink timing advance amount to one of the following network side entities:
  • the requesting module is further configured to: when the request for acquiring the uplink timing advance is initiated to the transmission point that belongs to the same group as the target transmission point, the group is grouped in a manner including one of the following manners or a combination thereof:
  • the transmission point After determining, by the network side, the transmission point that may be used for data transmission with the terminal, the transmission point is grouped according to the uplink timing advance required for data transmission between the terminal and each transmission point;
  • the transmission point After the terminal feeds back to the network side a transmission point that may be transmitted with the terminal, the transmission point is grouped according to the uplink timing advance required for the data transmission by the terminal and each transmission point;
  • the terminal searches for possible transmission points in the current area, measures downlink signals of each transmission point, and estimates the uplink timing advance according to the downlink signal, and then performs grouping.
  • it further includes:
  • the maintenance module 804 is configured to maintain an uplink timing advance in one of the following manners or a combination thereof:
  • the timing advance timer After receiving the message carrying the uplink timing advance amount returned by the network side, the timing advance timer is started, and when the new timing advance is received, the timing advance timer is restarted, and when the timing advance timer expires, the uplink timing is initiated. Advance request;
  • the timing advance amount is adjusted according to the distance from the target transmission point
  • a request to acquire an uplink timing advance is initiated when a transmission characteristic change of the target transmission point or a target transmission point is changed.
  • the timing advance timer is: a timing advance timer received from the network side, or a timing advance timer specified by a protocol, or a timing advance timer built in the terminal.
  • FIG. 9 is a schematic structural diagram of a system for returning an uplink timing advance amount, as shown in the figure, which may include:
  • the receiving module 901 is configured to receive, by the terminal, a request for acquiring an uplink timing advance amount that is sent by the terminal to the network side, where the uplink timing advance quantity is an uplink timing advance amount required for the terminal to transmit data to the target transmission point;
  • a determining module 902 configured to determine an uplink timing advance required by the terminal to transmit data to the target transmission point;
  • the returning module 903 is configured to return a message carrying the uplink timing advance amount to the terminal.
  • the receiving module is located in one of the following network side entities:
  • it further includes:
  • a grouping module 904 configured to perform each transmission of data transmission with the terminal in one or a combination of the following manners Points are grouped:
  • the transmission point After determining, by the network side, the transmission point that may be used for data transmission with the terminal, the transmission point is grouped according to the uplink timing advance required for data transmission between the terminal and each transmission point;
  • the transmission point After the terminal feeds back to the network side a transmission point that may be transmitted with the terminal, the transmission point is grouped according to the uplink timing advance required for the data transmission by the terminal and each transmission point;
  • the terminal searches for possible transmission points in the current area, measures downlink signals of each transmission point, and estimates the uplink timing advance according to the downlink signal, and then performs grouping.
  • the determining module is located at the current transmission point, and is further configured to determine, by the target transmission point, an uplink timing advance required by the terminal to transmit data to the target transmission point when the receiving module is located at the target transmission point, and the returning module is located at the current transmission point. the amount.
  • the returning module is further configured to return, to the terminal, a message carrying the effective duration of the uplink timing advance.
  • the determining module is further configured to determine an uplink timing advance required by the terminal to transmit data to the target transmission point in one of the following manners or a combination thereof:
  • the network side device that receives the request for obtaining the uplink timing advance is the target transmission point, determining the measured value according to the uplink reference signal or the uplink transmission signal sent by the terminal;
  • the network side device receiving the acquisition uplink timing advance request is not the target transmission point, according to the timing advance of the terminal to the current transmission point, the distance from the target transmission point to the terminal or the target transmission point to the current transmission point, and the target transmission One of the transmission frequencies of the points or a combination thereof is determined, wherein the current transmission point is a network side device that receives the request for acquiring the uplink timing advance amount.
  • it further includes:
  • the update module 905 is configured to determine, after the network side determines the uplink timing advance amount change, the changed uplink timing advance amount; send the uplink timing advance amount command to the terminal; enable the changed uplink timing advance amount with the terminal, and restart the timing advance Quantity timer.
  • FIG. 10 is a schematic structural diagram of a terminal. As shown in the figure, the terminal includes:
  • the processor 1000 is configured to read a program in the memory 1020 and perform the following process:
  • the transceiver 1010 is configured to receive and send data under the control of the processor 1000, and perform the following processes:
  • the message returned by the network side carrying the uplink timing advance amount is received.
  • the transceiver 1010 when the request for acquiring the uplink timing advance is initiated to the network side, the transceiver 1010 is initiated to one of the following network side entities:
  • the processor 1000 when grouping each transmission point that performs data transmission with the terminal, the processor 1000 adopts one of the following ways or a combination thereof:
  • the transmission point After determining, by the network side, the transmission point that may be used for data transmission with the terminal, the transmission point is grouped according to the uplink timing advance required for data transmission between the terminal and each transmission point;
  • the transmission point After the terminal feeds back to the network side a transmission point that may be transmitted with the terminal, the transmission point is grouped according to the uplink timing advance required for the data transmission by the terminal and each transmission point;
  • the terminal searches for possible transmission points in the current area, measures downlink signals of each transmission point, and estimates the uplink timing advance according to the downlink signal, and then performs grouping.
  • the transceiver 1010 further performs one or a combination of the following:
  • the timing advance timer After receiving the message carrying the uplink timing advance amount returned by the network side, the timing advance timer is started, and when the new timing advance is received, the timing advance timer is restarted, and when the timing advance timer expires, the uplink timing is initiated. Advance request;
  • the timing advance amount is adjusted according to the distance from the target transmission point
  • a request to acquire an uplink timing advance is initiated when a transmission characteristic change of the target transmission point or a target transmission point is changed.
  • the timing advance timer is: a timing advance timer received from the network side, or a timing advance timer specified by a protocol, or a timing advance timer built in the terminal.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1000 and various circuits of memory represented by memory 1020.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the transceiver 1010 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 1030 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1000 is responsible for managing the bus architecture and general processing, and the memory 1020 can store data used by the processor 1000 in performing operations.
  • the network side device is not necessarily a separate physical device that exists physically. In fact, it may be composed of the current transmission point, the target transmission point, etc., and jointly implement the functions therein, but it is easy to understand that they are specific
  • the physical device can be implemented by specific components such as a processor and a transceiver. The following describes the implementation of each component that may be located on different physical devices.
  • the network side device includes:
  • the processor 1100 is configured to read a program in the memory 1120 and perform the following process:
  • the transceiver 1110 is configured to receive and send data under the control of the processor 1100, and performs the following processes:
  • the terminal Receiving, by the terminal, a request for acquiring an uplink timing advance amount to the network side, where the uplink timing advance amount is an uplink timing advance amount required for the terminal to transmit data to the target transmission point;
  • a message carrying the uplink timing advance is returned to the terminal.
  • the transceiver 1110 is received by one of the following network side entities:
  • the processor 1100 when grouping the transmission points that perform data transmission with the terminal, the processor 1100 adopts one of the following methods or a combination thereof:
  • the transmission point After determining, by the network side, the transmission point that may be used for data transmission with the terminal, the transmission point is grouped according to the uplink timing advance required for data transmission between the terminal and each transmission point;
  • the transmission point After the terminal feeds back to the network side a transmission point that may be transmitted with the terminal, the transmission point is grouped according to the uplink timing advance required for the data transmission by the terminal and each transmission point;
  • the terminal searches for possible transmission points in the current area, measures downlink signals of each transmission point, and estimates the uplink timing advance according to the downlink signal, and then performs grouping.
  • the receiving and receiving the uplink timing advance request is the target transmission point, and returning the network side device carrying the message with the uplink timing advance amount to the current transmission point, the current transmission point is determined by the target transmission point to the terminal.
  • the upstream timing advance required for the target transmission point to transmit data is determined by the target transmission point to the terminal.
  • the transceiver 1110 is further configured to:
  • the processor 1100 when determining an uplink timing advance required by the terminal to transmit data to the target transmission point, the processor 1100 adopts one of the following manners or a combination thereof:
  • the network side device that receives the request for obtaining the uplink timing advance is the target transmission point, determining the measured value according to the uplink reference signal or the uplink transmission signal sent by the terminal;
  • the network side device receiving the acquisition uplink timing advance request is not the target transmission point, according to the timing advance of the terminal to the current transmission point, the distance from the target transmission point to the terminal or the target transmission point to the current transmission point, and the target transmission One of the transmission frequencies of the points or a combination thereof is determined, wherein the current transmission point is a network side device that receives the request for acquiring the uplink timing advance amount.
  • processor 1100 is further configured to:
  • the uplink timing advance after the change is enabled with the terminal, and the timing advance timer is restarted.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1100 and various circuits of memory represented by memory 1120.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the transceiver 1110 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 can store data used by the processor 1100 in performing operations.
  • the terminal selects the network side transmission point, and initiates the process of acquiring the uplink timing advance amount to the network side as needed.
  • the network side estimates the timing advance of the terminal to the target transmission point, and notifies the terminal of the timing advance amount information.
  • the scheme further provides a transmission point grouping and scheme based on the timing advance amount, a scheme for the terminal to acquire the timing advance amount of the transmission point, and a maintenance scheme of the timing advance amount.
  • the uplink transmission when the terminal flexibly selects the transmission point can be effectively realized.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé, un dispositif et un système pour acquérir et retourner une avance temporelle de liaison montante. Le procédé comprend les étapes consistant à : déterminer un point de transmission cible auquel un terminal doit transmettre des données tout en acquérant l'avance temporelle de liaison montante ; initier une demande pour acquérir l'avance temporelle de liaison montante sur un côté réseau ; et selon le message contenant l'avance temporelle de liaison montante retournée depuis le côté réseau, déterminer l'avance temporelle de liaison montante requise par le terminal pour transmettre des données au point de transmission cible. Lors du retour de l'avance temporelle de liaison montante, le procédé comprend les étapes consistant à : recevoir la demande d'acquisition de l'avance temporelle de liaison montante que le terminal initie sur le côté réseau ; déterminer l'avance temporelle de liaison montante requise par le terminal pour transmettre des données au point de transmission cible ; et retourner le message contenant l'avance temporelle de liaison montante, au terminal. L'invention permet d'acquérir l'avance temporelle de liaison montante pour le point de transmission même en l'absence de transmission de données ou de signalisation du point de transmission sélectionné par le terminal, avec le terminal, à un moment précédent. Cela permet au terminal d'exécuter efficacement la transmission de liaison montante après une sélection libre du point de transmission par le terminal.
PCT/CN2017/071003 2016-02-19 2017-01-12 Procédé, dispositif et système pour acquérir et retourner une avance temporelle de liaison montante WO2017140195A1 (fr)

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CN112534893B (zh) * 2018-08-10 2022-09-16 华为技术有限公司 一种通信方法及设备
EP3860234A4 (fr) * 2018-09-28 2021-11-17 Huawei Technologies Co., Ltd. Procédé et dispositif de transmission de signal de liaison montante
CN112771943A (zh) * 2020-12-31 2021-05-07 北京小米移动软件有限公司 上行定时提前量确定、公共定时相关信息广播方法和装置
CN113079536A (zh) * 2021-04-07 2021-07-06 Tcl通讯（宁波）有限公司 一种定时提前量的更新方法、装置及移动终端
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