WO2017140195A1 - 一种获取、返回上行定时提前量的方法及装置、系统 - Google Patents

一种获取、返回上行定时提前量的方法及装置、系统 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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WIPO (PCT)
Prior art keywords
transmission point
timing advance
terminal
uplink timing
network side
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PCT/CN2017/071003
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English (en)
French (fr)
Inventor
谌丽
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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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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Abstract

公开了一种获取、返回上行定时提前量的方法及装置、系统，包括：在获取上行定时提前量时，确定终端需要传输数据的目标传输点；向网络侧发起获取上行定时提前量的请求；根据网络侧返回的携带有上行定时提前量的消息确定该终端向该目标传输点传输数据所需的上行定时提前量。在返回上行定时提前量时，接收终端向网络侧发起的获取上行定时提前量的请求；确定终端向该目标传输点传输数据所需的上行定时提前量；向终端返回携带有所述上行定时提前量的消息。采用本方案，即使终端所选择的传输点在上一个时刻与终端没有任何数据或信令传输，也可以获得该传输点的上行定时提前量，从而使得终端能够有效实现终端灵活选择传输点时的上行传输。

Description

一种获取、返回上行定时提前量的方法及装置、系统
本申请要求在2016年02月19日提交中国专利局、申请号为201610095127.5、发明名称为“一种获取、返回上行定时提前量的方法及装置、系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术领域，特别涉及一种获取、返回上行定时提前量的方法及装置、系统。
背景技术
在无线通信系统中，信号传输要经过空口路径，到达接收端的时刻有一定延时。无线通信系统采用规定的帧结构进行传输，对于上行(终端到网络侧传输点)传输，多个终端在上行链路传输时由于路径不同有不同的传输时延，为了实现发送端和接收端定时关系一致，以使来自同一小区的不同终端的上行传输之间互不干扰，发送端需要有一定的定时提前量。图1为上行定时提前量示意图，如图所示，为了使基站在T0时刻接收上行传输，终端1需要以定时提前量TA1发送上行传输，终端2需要以定时提前量TA2发送上行传输。
以长期演进(Long Term Evolution，LTE)系统为例，基站侧通过测量终端上行信号或上行传输，估计终端上行传输所需的定时提前量(Timing Advance，TA)，通过时间提前命令(Timing Advance Command，TAC)通知终端上行传输定时调整，并为终端配置时间对准定时器(Timing Alignment Timer，TAT)限制TAC有效时间，如果TAT超时还没有收到新的TAC，则认为终端上行失步，不能发送上行传输。
现有技术的不足在于：在由终端选择合适的传输点进行传输时，如果终端所选择的传输点在上一个时刻与终端没有任何数据或信令传输，LTE系统这种由基站主动测量和通知终端上行定时提前量的方式将不再可行。
发明内容
本发明提供了一种获取、返回上行定时提前量的方法及装置、系统，用以提供在由终端选择合适的传输点进行传输时，终端获取上行定时提前量的方案。
本发明实施例中提供了一种获取上行定时提前量的方法，包括：
确定终端需要传输数据的目标传输点；
向网络侧发起获取上行定时提前量的请求，所述上行定时提前量是该终端向该目标传输点传输数据所需的上行定时提前量；
根据网络侧返回的携带有上行定时提前量的消息确定该终端向该目标传输点传输数据所需的上行定时提前量。
较佳地，在向网络侧发起获取上行定时提前量的请求时，是向如下网络侧实体之一发起：
目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
较佳地，对与终端进行数据传输的各传输点进行分组，包括以下方式之一或者其组合：
在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
较佳地，进一步包括以下方式之一或者其组合：
在接收到网络侧返回的携带有上行定时提前量的消息后启动定时提前量定时器，当接收到新的定时提前量时重启定时提前量定时器，定时提前量定时器超时则发起获取上行定时提前量的请求；
在终端移动时，根据与目标传输点的距离调整定时提前量；
在目标传输点传输特性变化，或目标传输点变更时，发起获取上行定时提前量的请求。
较佳地，所述定时提前量定时器是：从网络侧接收的定时提前量定时器，或采用协议规定的定时提前量定时器，或在终端内置的定时提前量定时器。
本发明实施例中提供了一种返回上行定时提前量的方法，包括：
接收终端向网络侧发起的获取上行定时提前量的请求，所述上行定时提前量是该终端向目标传输点传输数据所需的上行定时提前量；
确定终端向该目标传输点传输数据所需的上行定时提前量；
向终端返回携带有所述上行定时提前量的消息。
较佳地，在接收终端向网络侧发起的获取上行定时提前量的请求时，是如下网络侧实体之一接收的：
目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
较佳地，对与终端进行数据传输的各传输点进行分组，包括以下方式之一或者其组合：
在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
较佳地，在接收获取上行定时提前量请求为目标传输点，以及向终端返回携带有上行定时提前量的消息的网络侧设备为当前传输点时，当前传输点是通过目标传输点确定终端向该目标传输点传输数据所需的上行定时提前量的。
较佳地，进一步包括：向终端返回携带有所述上行定时提前量的有效时长的消息。
较佳地，确定终端向该目标传输点传输数据所需的上行定时提前量，包括以下方式之一或者其组合：
在接收获取上行定时提前量请求的网络侧设备为目标传输点时，根据对该终端发送的上行参考信号或上行传输信号进行的测量值确定；
在接收获取上行定时提前量请求的网络侧设备不为目标传输点时，根据该终端到当前传输点的定时提前量，目标传输点到终端或目标传输点到当前传输点的距离，以及目标传输点的传输频率之一或者其组合确定，其中，当前传输点是接收获取上行定时提前量请求的网络侧设备。
较佳地，进一步包括：在网络侧确定上行定时提前量变更后，确定变更后的上行定时提前量；
向终端发送上行定时提前量命令；
与终端启用变更后的上行定时提前量，并重启定时提前量定时器。
本发明实施例中提供了一种获取上行定时提前量的装置，包括：
传输点确定模块，用于确定终端需要传输数据的目标传输点；
请求模块，用于向网络侧发起获取上行定时提前量的请求，所述上行定时提前量是该 终端向该目标传输点传输数据所需的上行定时提前量；
提前量确定模块，用于根据网络侧返回的携带有上行定时提前量的消息确定该终端向该目标传输点传输数据所需的上行定时提前量。
较佳地，请求模块进一步用于向如下网络侧实体之一发起获取上行定时提前量的请求：
目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
较佳地，请求模块进一步用于在向与目标传输点属于同组的传输点发起获取上行定时提前量的请求时，所述组是按包括以下方式之一或者其组合的方式进行分组的：
在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
较佳地，进一步包括：维护模块，用于按以下方式之一或者其组合维护上行定时提前量：
在接收到网络侧返回的携带有上行定时提前量的消息后启动定时提前量定时器，当接收到新的定时提前量时重启定时提前量定时器，定时提前量定时器超时则发起获取上行定时提前量的请求；
在终端移动时，根据与目标传输点的距离调整定时提前量；
在目标传输点传输特性变化，或目标传输点变更时，发起获取上行定时提前量的请求。
较佳地，所述定时提前量定时器是：从网络侧接收的定时提前量定时器，或采用协议规定的定时提前量定时器，或在终端内置的定时提前量定时器。
本发明实施例中提供了一种返回上行定时提前量的系统，包括：
接收模块，用于接收终端向网络侧发起的获取上行定时提前量的请求，所述上行定时提前量是该终端向目标传输点传输数据所需的上行定时提前量；
确定模块，用于确定终端向该目标传输点传输数据所需的上行定时提前量；
返回模块，用于向终端返回携带有所述上行定时提前量的消息。
较佳地，接收模块位于如下网络侧实体之一：
目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
较佳地，进一步包括：分组模块，用于按包括以下方式之一或者其组合对与终端进行数据传输的各传输点进行分组：
在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
较佳地，确定模块位于当前传输点，进一步用于在接收模块位于目标传输点，以及返回模块位于为当前传输点时，通过目标传输点确定终端向该目标传输点传输数据所需的上行定时提前量。
较佳地，返回模块进一步用于向终端返回携带有所述上行定时提前量的有效时长的消息。
较佳地，确定模块进一步用于按以下方式之一或者其组合确定终端向该目标传输点传输数据所需的上行定时提前量：
在接收获取上行定时提前量请求的网络侧设备为目标传输点时，根据对该终端发送的上行参考信号或上行传输信号进行的测量值确定；
在接收获取上行定时提前量请求的网络侧设备不为目标传输点时，根据该终端到当前传输点的定时提前量，目标传输点到终端或目标传输点到当前传输点的距离，以及目标传输点的传输频率之一或者其组合确定，其中，当前传输点是接收获取上行定时提前量请求的网络侧设备。
较佳地，进一步包括：更新模块，用于在网络侧确定上行定时提前量变更后，确定变更后的上行定时提前量；向终端发送上行定时提前量命令；与终端启用变更后的上行定时提前量，并重启定时提前量定时器。
一种获取上行定时提前量的装置，包括：
处理器，用于读取存储器中的程序，执行下列过程：
确定终端需要传输数据的目标传输点；
根据网络侧返回的携带有上行定时提前量的消息确定该终端向该目标传输点传输数 据所需的上行定时提前量；
收发机，用于在处理器的控制下接收及发送数据，执行下列过程：
向网络侧发起获取上行定时提前量的请求，所述上行定时提前量是该终端向该目标传输点传输数据所需的上行定时提前量；
接收网络侧返回的携带有上行定时提前量的消息。
较佳的，在向网络侧发起获取上行定时提前量的请求时，收发机是向如下网络侧实体之一发起：
目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
较佳的，对与终端进行数据传输的各传输点进行分组时，处理器采用以下方式之一或者其组合：
在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
较佳的，收发机进一步执行以下方式之一或者其组合：
在接收到网络侧返回的携带有上行定时提前量的消息后启动定时提前量定时器，当接收到新的定时提前量时重启定时提前量定时器，定时提前量定时器超时则发起获取上行定时提前量的请求；
在终端移动时，根据与目标传输点的距离调整定时提前量；
在目标传输点传输特性变化，或目标传输点变更时，发起获取上行定时提前量的请求。
较佳的，所述定时提前量定时器是：从网络侧接收的定时提前量定时器，或采用协议规定的定时提前量定时器，或在终端内置的定时提前量定时器。
一种返回上行定时提前量的装置，包括：
处理器，用于读取存储器中的程序，执行下列过程：
确定终端向该目标传输点传输数据所需的上行定时提前量；
收发机，用于在处理器的控制下接收及发送数据，执行下列过程：
接收终端向网络侧发起的获取上行定时提前量的请求，所述上行定时提前量是该终端向目标传输点传输数据所需的上行定时提前量；
向终端返回携带有所述上行定时提前量的消息。
较佳的，在接收终端向网络侧发起的获取上行定时提前量的请求时，收发机是通过如下网络侧实体之一接收的：
目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
较佳的，对与终端进行数据传输的各传输点进行分组时，处理器采用以下方式之一或者其组合：
在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
较佳的，在接收获取上行定时提前量请求为目标传输点，以及向终端返回携带有上行定时提前量的消息的网络侧设备为当前传输点时，当前传输点是通过目标传输点确定终端向该目标传输点传输数据所需的上行定时提前量的。
较佳的，收发机进一步用于：
向终端返回携带有所述上行定时提前量的有效时长的消息。
较佳的，确定终端向该目标传输点传输数据所需的上行定时提前量时，处理器采用以下方式之一或者其组合：
在接收获取上行定时提前量请求的网络侧设备为目标传输点时，根据对该终端发送的上行参考信号或上行传输信号进行的测量值确定；
在接收获取上行定时提前量请求的网络侧设备不为目标传输点时，根据该终端到当前传输点的定时提前量，目标传输点到终端或目标传输点到当前传输点的距离，以及目标传输点的传输频率之一或者其组合确定，其中，当前传输点是接收获取上行定时提前量请求的网络侧设备。
较佳的，处理器进一步用于：
在网络侧确定上行定时提前量变更后，确定变更后的上行定时提前量；
通过收发机向终端发送上行定时提前量命令；
与终端启用变更后的上行定时提前量，并重启定时提前量定时器。
本发明有益效果如下：
在本发明实施例提供的技术方案中，由终端侧在确定终端需要传输数据的目标传输点后，向网络侧发起获取上行定时提前量的请求，并根据网络侧返回的消息确定所需的上行 定时提前量。
而在网络侧，在接收到终端的获取上行定时提前量的请求后，确定终端向该目标传输点传输数据所需的上行定时提前量，并向终端返回。
可见，在以终端为中心的多连接通信过程中，在由终端选择合适的传输点进行传输时，即使终端所选择的传输点在上一个时刻与终端没有任何数据或信令传输，采用本方案也可以获得该传输点的上行定时提前量，从而使得终端能够有效实现终端灵活选择传输点时的上行传输。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本发明的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1为背景技术中上行定时提前量示意图；
图2为本发明实施例中终端侧获取上行定时提前量的方法实施流程示意图；
图3为本发明实施例中网络侧返回上行定时提前量的方法实施流程示意图；
图4为本发明实施例中定时提前量分组示意图；
图5为本发明实施例中终端获取定时提前量的实施例一实施流程示意图；
图6为本发明实施例中终端获取定时提前量的实施例二实施流程示意图；
图7为本发明实施例中终端获取定时提前量的实施例三实施流程示意图；
图8为本发明实施例中获取上行定时提前量的装置结构示意图；
图9为本发明实施例中返回上行定时提前量的系统结构示意图；
图10为本发明实施例中终端结构示意图；
图11为本发明实施例中网络侧设备结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
应理解，本发明的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、 通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、先进的长期演进(Advanced long term evolution，LTE-A)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)等。
还应理解，在本发明实施例中，用户设备(User Equipment，UE)包括但不限于移动台(Mobile Station，MS)、移动终端(Mobile Terminal)、移动电话(Mobile Telephone)、手机(handset)及便携设备(portable equipment)等，该用户设备可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，例如，用户设备可以是移动电话(或称为“蜂窝”电话)、具有无线通信功能的计算机等，用户设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。
在本发明实施例中，基站(例如，接入点)可以是指接入网中在空中接口上通过一个或多个扇区与无线终端通信的设备。基站可用于将收到的空中帧与IP分组进行相互转换，作为无线终端与接入网的其余部分之间的路由器，其中接入网的其余部分可包括网际协议(IP)网络。基站还可协调对空中接口的属性管理。例如，基站可以是GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB)，还可以是LTE中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，本发明并不限定。
下面结合附图对本发明的具体实施方式进行说明。
发明人在发明过程中注意到：
未来无线通信系统是包括各类设备的端到端生态系统。需要具备比4G更高的性能，支持0.1～1Gbps的用户体验速率，每平方公里一百万的连接数密度，毫秒级的端到端时延，每平方公里数十Tbps的流量密度，每小时500Km以上的移动性和数十Gbps的峰值速率。未来无线通信多种无线通信系统大量共存，终端可以同时与不同的无线通信系统或相同无线通信系统下的多个传输点保持通信连接和传输。与终端进行无线传输的网络侧不同传输点位置不同，频率不同，上行定时提前量也有差别。在以终端为中心的多连接通信过程中，由终端选择合适的传输点进行传输，终端所选择的传输点在上一个时刻很可能与终端没有任何数据或信令传输，因此，LTE系统这种由基站主动测量和通知终端上行定时提前量的方式不再可行。
基于此，提供了一种获取、返回上行定时提前量的方法及装置，方案中，将由终端选择网络侧传输点，根据需要向网络侧发起获取上行定时提前量过程。在网络侧则估计终端到目标传输点的定时提前量，并通知终端该定时提前量信息。下面进行具体说明。
在说明过程中，将分别从终端侧与网络侧的实施进行说明，其中终端侧将主要说明获取的过程，网络侧将主要说明返回上行定时提前量的过程，然后还将给出二者配合实施的实例以更好地理解本发明实施例中给出的方案的实施。这样的说明方式并不意味着二者必 须配合实施、或者必须单独实施，实际上，当终端侧与网络侧分开实施时，其也各自解决终端侧、网络侧的问题，而二者结合使用时，会获得更好的技术效果。
图2为终端侧获取上行定时提前量的方法实施流程示意图，如图所示，可以包括：
步骤201、确定终端需要传输数据的目标传输点；
步骤202、向网络侧发起获取上行定时提前量的请求，所述上行定时提前量是该终端向该目标传输点传输数据所需的上行定时提前量；
步骤203、根据网络侧返回的携带有上行定时提前量的消息确定该终端向该目标传输点传输数据所需的上行定时提前量。
图3为网络侧返回上行定时提前量的方法实施流程示意图，如图所示，可以包括：
步骤301、接收终端向网络侧发起的获取上行定时提前量的请求，所述上行定时提前量是该终端向目标传输点传输数据所需的上行定时提前量；
步骤302、确定终端向该目标传输点传输数据所需的上行定时提前量；
步骤303、向终端返回携带有所述上行定时提前量的消息。
下面先对实施的实体设备进行说明，
向网络侧发起获取上行定时提前量的请求的是终端，相应的，在接收终端向网络侧发起的获取上行定时提前量的请求时，是如下网络侧实体之一接收的：
目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
下面对基于定时提前量的传输点进行分组的实施进行说明。
在终端有多个传输点时，基于传输接收点(Transmission Reception Point，TRP)(以下简称传输点)的不同特性(如传输点位置、传输点的传输频率等)可能有不同的上行定时提前量。这样，可以将定时提前量相同的传输点可以分为一组。
图4为定时提前量分组示意图，为便于表述，将这样根据上行定时提前量进行的分组称为TA组，如图4所示，TRP1是采用较低频率的广覆盖传输点，归属于TA组1；TRP2和TRP3具有相同的定时提前量，归属于TA组2；TRP4和TRP5具有相同的定时提前量，归属于TA组3。在一个TA组内终端只需要和一个传输点保持上行同步就可以实现对TA组内所有传输点的上行同步。
具体实施中，对与终端进行数据传输的各传输点进行分组，可以包括以下方式之一或者其组合：
方式1：
在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组。
具体的，网络侧将一定区域内可能与终端进行传输的传输点进行TA组划分，并通知终端，通知方式为单播通知单个终端或区域内广播所有区域内终端。
方式2：
在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组。
具体的，终端查找当前区域内可能的传输点，向当前传输点反馈可能的传输点列表，网络侧根据该可能传输点列表进行TA分组，并通知该终端。
方式3：
在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
具体的，终端查找当前区域内可能的传输点，测量传输点的下行信号，根据下行信号估计上行传输特性，进行TA分组，这种方式可以由终端维护TA分组。
下面针对上述网络侧实体(目标传输点、当前传输点、与目标传输点属于同组的传输点)，以实例进行说明终端获取到传输点的定时提前量的实施方式。实例中，还可以进一步包括：
向终端返回携带有上行定时提前量的有效时长的消息。
方式1：
步骤一：终端选择目标传输点，确认是否存有目标传输点(或目标传输点所属TA组)的定时提前量，如果没有，向网络侧发起获取目标传输点(或目标传输点TA组)定时提前量的过程，具体可以为在当前传输点发送请求消息，请求消息中携带目标传输点传输点号(TRP ID)或传输点组号(TAG ID)；
步骤二：当前传输点接收请求消息，网络侧估计终端到目标传输点(或目标传输点TA组)的定时提前量；
步骤三：由当前传输点将终端到目标传输点的定时提前量信息发送给终端，可选地，可以同时发送该定时提前量有效时长TAT。
方式2：
步骤一：终端选择目标传输点，确认是否存有目标传输点(或目标传输点所属TA组)的定时提前量，如果没有，向网络侧发起获取目标传输点(或目标传输点TA组)定时提前量的过程，具体为向目标传输点或目标传输点所属TA组的其他传输点发送上行探测信号；
步骤二：目标传输点或目标传输点所属TA组的其他传输点接收终端发送的上行探测信号，根据探测信号计算上行定时提前量；
步骤三：由目标传输点或目标传输点所属TA组的其他传输点或当前传输点将终端到 目标传输点的定时提前量信息发送给终端，可选地，可以同时发送该定时提前量有效时长TAT。
下面对在网络侧估计定时提前量的实施进行说明，也即，在网络侧接收到终端发送的定时提前量请求后，可以通过以下几种方式估计终端到目标传输点的定时提前量。
实施中，确定终端向该目标传输点传输数据所需的上行定时提前量，可以包括以下方式之一或者其组合：
在接收获取上行定时提前量请求的网络侧设备为目标传输点时，根据对该终端发送的上行参考信号或上行传输信号进行的测量值确定。
具体的，目标传输点接收终端发送的上行参考信号或上行传输并进行测量，根据该测量值得到定时提前量。
在接收获取上行定时提前量请求的网络侧设备不为目标传输点时，根据该终端到当前传输点的定时提前量，目标传输点到终端或目标传输点到当前传输点的距离，以及目标传输点的传输频率之一或者其组合确定，其中，当前传输点是接收获取上行定时提前量请求的网络侧设备。
具体的，网络侧根据终端到当前传输点的定时提前量，结合目标传输点到终端或当前传输点的距离，以及目标传输点的传输频率，估算终端到目标传输点的定时提前量。
当定时提前量可能发生变化，如终端位置变更、目标TRP位置变更、目标TRP变更、TAT超时时，需要发起定时提前量更新。下面结合实例对定时提前量的维护的实施进行说明。
1、在终端侧的更新
实施中，在终端对接收到的目标传输点定时提前量进行维护时，还可以进一步包括以下方式之一或者其组合：
在接收到网络侧返回的携带有上行定时提前量的消息后启动定时提前量定时器，当接收到新的定时提前量时重启定时提前量定时器，定时提前量定时器超时则发起获取上行定时提前量的请求；
具体实施中，定时提前量定时器可以是：从网络侧接收的定时提前量定时器，或采用协议规定的定时提前量定时器，或在终端内置的定时提前量定时器。
具体的，从网络侧接收TAT或采用协议规定或终端内置的TAT，接收到定时提前量时启动TAT，当接收到新的TAC时重启TAT，TAT超时则定时提前量失效，需要重新获取。
在终端移动时，根据与目标传输点的距离调整定时提前量；
在目标传输点传输特性变化，或目标传输点变更时，发起获取上行定时提前量的请求；
具体的，如果目标传输点传输特性(如频率、位置)变化，或目标传输点变更时，重新启动定时提前量获取过程。
下面以实例进行说明终端侧触发定时提前量更新的实施。
步骤一：终端侧确定需要进行TA更新，触发条件为终端位置变更、目标TRP变更、TAT超时；
步骤二：终端发起定时提前量获取过程并更新当前存储的定时提前量和TA定时器。
2、在网络侧的更新
实施中，在网络侧对接收到的目标传输点定时提前量进行维护时，还可以进一步包括：
在网络侧确定上行定时提前量变更后，确定变更后的上行定时提前量；
向终端发送上行定时提前量命令；
与终端启用变更后的上行定时提前量，并重启定时提前量定时器。
下面以实例进行说明网络侧触发定时提前量更新的实施。
步骤一：网络侧确定TA变更并计算新的TA值，触发条件为目标TRP位置变更，或TAT超时，或测量终端的上行信号或传输得到TA值变化；
步骤二：当前TRP或目标TRP向终端发生新的TA命令，网络侧和终端应用新TA值时都重启TAT。
下面以实例进行说明。
实施例一：
图5为终端获取定时提前量的实施例一实施流程示意图，如图所示，可以包括：
步骤501：终端向当前TRP发送获取TA的请求消息。
实施中，终端选择目标传输点，确认是否存有目标传输点(或目标传输点所属TA组)的定时提前量，如果没有，向网络侧发起获取目标传输点(或目标传输点TA组)定时提前量的过程，具体为在当前传输点发送请求消息，请求消息中携带目标传输点传输点号(TRP ID)或传输点组号(TAG ID)。
步骤502：网络侧估计目标TRP的TA值。
实施中，当前传输点接收请求消息，网络侧估计终端到目标传输点(或目标传输点TA组)的定时提前量。
步骤503：当前TRP向终端发送目标TRP的TA值。
实施中，由当前传输点将终端到目标传输点的定时提前量信息发送给终端，可选地，可以同时发送该定时提前量有效时长TAT。
实施例二：
图6为终端获取定时提前量的实施例二实施流程示意图，如图所示，可以包括：
步骤601：终端向目标TRP发送探测信号。
实施中，终端选择目标传输点，确认是否存有目标传输点(或目标传输点所属TA组)的定时提前量，如果没有，向网络侧发起获取目标传输点(或目标传输点TA组)定时提 前量的过程，具体可以为向目标传输点或目标传输点所属TA组的其他目标传输点发送上行探测信号。
步骤602：目标TRP计算TA值。
实施中，目标传输点或目标传输点所属TA组的其他目标传输点接收终端发送的上行探测信号，根据探测信号计算上行定时提前量。
步骤603：目标TRP向终端发送目标TRP的TA值。
实施中，由目标传输点或目标传输点所属TA组的其他目标传输点将终端到目标传输点的定时提前量信息发送给终端，可选地，可以同时发送该定时提前量有效时长TAT。
实施例三：
图7为终端获取定时提前量的实施例三实施流程示意图，如图所示，可以包括：
步骤701：终端向目标TRP发送探测信号。
实施中，终端选择目标传输点，确认是否存有目标传输点(或目标传输点所属TA组)的定时提前量，如果没有，向网络侧发起获取目标传输点(或目标传输点TA组)定时提前量的过程，具体可以为向目标传输点或目标传输点所属TA组的其他目标传输点发送上行探测信号。
步骤702：目标TRP计算TA值。
实施中，目标传输点或目标传输点所属TA组的其他目标传输点接收终端发送的上行探测信号，根据探测信号计算上行定时提前量。
步骤703：当前TRP获取TA值。
实施中，目标传输点(或目标传输点组的传输点)与当前TRP交互TA和TAT信息。
步骤704：当前TRP向终端发送目标TRP的TA值。
实施中，由当前传输点将终端到目标传输点的定时提前量信息发送给终端，可选地，可以同时发送该定时提前量有效时长TAT。
基于同一发明构思，本发明实施例中还提供了一种获取上行定时提前量的装置、一种返回上行定时提前量的系统，由于这些装置解决问题的原理与一种获取上行定时提前量的方法、一种返回上行定时提前量的方法相似，因此这些装置的实施可以参见方法的实施，重复之处不再赘述。
图8为获取上行定时提前量的装置结构示意图，如图所示，可以包括：
传输点确定模块801，用于确定终端需要传输数据的目标传输点；
请求模块802，用于向网络侧发起获取上行定时提前量的请求，所述上行定时提前量是该终端向该目标传输点传输数据所需的上行定时提前量；
提前量确定模块803，用于根据网络侧返回的携带有上行定时提前量的消息确定该终端向该目标传输点传输数据所需的上行定时提前量。
实施中，请求模块进一步用于向如下网络侧实体之一发起获取上行定时提前量的请求：
目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
实施中，请求模块进一步用于在向与目标传输点属于同组的传输点发起获取上行定时提前量的请求时，所述组是按包括以下方式之一或者其组合的方式进行分组的：
在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
实施中，进一步包括：
维护模块804，用于按以下方式之一或者其组合维护上行定时提前量：
在接收到网络侧返回的携带有上行定时提前量的消息后启动定时提前量定时器，当接收到新的定时提前量时重启定时提前量定时器，定时提前量定时器超时则发起获取上行定时提前量的请求；
在终端移动时，根据与目标传输点的距离调整定时提前量；
在目标传输点传输特性变化，或目标传输点变更时，发起获取上行定时提前量的请求。
实施中，所述定时提前量定时器是：从网络侧接收的定时提前量定时器，或采用协议规定的定时提前量定时器，或在终端内置的定时提前量定时器。
图9为返回上行定时提前量的系统结构示意图，如图所示，可以包括：
接收模块901，用于接收终端向网络侧发起的获取上行定时提前量的请求，所述上行定时提前量是该终端向目标传输点传输数据所需的上行定时提前量；
确定模块902，用于确定终端向该目标传输点传输数据所需的上行定时提前量；
返回模块903，用于向终端返回携带有所述上行定时提前量的消息。
实施中，接收模块位于如下网络侧实体之一：
目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
实施中，进一步包括：
分组模块904，用于按包括以下方式之一或者其组合对与终端进行数据传输的各传输 点进行分组：
在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
实施中，确定模块位于当前传输点，进一步用于在接收模块位于目标传输点，以及返回模块位于为当前传输点时，通过目标传输点确定终端向该目标传输点传输数据所需的上行定时提前量。
实施中，返回模块进一步用于向终端返回携带有所述上行定时提前量的有效时长的消息。
实施中，确定模块进一步用于按以下方式之一或者其组合确定终端向该目标传输点传输数据所需的上行定时提前量：
在接收获取上行定时提前量请求的网络侧设备为目标传输点时，根据对该终端发送的上行参考信号或上行传输信号进行的测量值确定；
在接收获取上行定时提前量请求的网络侧设备不为目标传输点时，根据该终端到当前传输点的定时提前量，目标传输点到终端或目标传输点到当前传输点的距离，以及目标传输点的传输频率之一或者其组合确定，其中，当前传输点是接收获取上行定时提前量请求的网络侧设备。
实施中，进一步包括：
更新模块905，用于在网络侧确定上行定时提前量变更后，确定变更后的上行定时提前量；向终端发送上行定时提前量命令；与终端启用变更后的上行定时提前量，并重启定时提前量定时器。
为了描述的方便，以上所述装置的各部分以功能分为各种模块或单元分别描述。当然，在实施本发明时可以把各模块或单元的功能在同一个或多个软件或硬件中实现。
在实施本发明实施例提供的技术方案时，可以按如下方式实施。
图10为终端结构示意图，如图所示，终端包括：
处理器1000，用于读取存储器1020中的程序，执行下列过程：
确定终端需要传输数据的目标传输点；
根据网络侧返回的携带有上行定时提前量的消息确定该终端向该目标传输点传输数据所需的上行定时提前量；
收发机1010，用于在处理器1000的控制下接收及发送数据，执行下列过程：
向网络侧发起获取上行定时提前量的请求，所述上行定时提前量是该终端向该目标传输点传输数据所需的上行定时提前量；
接收网络侧返回的携带有上行定时提前量的消息。
实施中，在向网络侧发起获取上行定时提前量的请求时，收发机1010是向如下网络侧实体之一发起：
目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
实施中，对与终端进行数据传输的各传输点进行分组时，处理器1000采用以下方式之一或者其组合：
在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
实施中，收发机1010进一步执行以下方式之一或者其组合：
在接收到网络侧返回的携带有上行定时提前量的消息后启动定时提前量定时器，当接收到新的定时提前量时重启定时提前量定时器，定时提前量定时器超时则发起获取上行定时提前量的请求；
在终端移动时，根据与目标传输点的距离调整定时提前量；
在目标传输点传输特性变化，或目标传输点变更时，发起获取上行定时提前量的请求。
实施中，所述定时提前量定时器是：从网络侧接收的定时提前量定时器，或采用协议规定的定时提前量定时器，或在终端内置的定时提前量定时器。
其中，在图10中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1000代表的一个或多个处理器和存储器1020代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1010可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备，用户接口1030还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器1000负责管理总线架构和通常的处理，存储器1020可以存储处理器1000在执行操作时所使用的数据。
实施中，网络侧设备并不一定是物理上单独存在的一个独立实体设备，事实上它可能是由当前传输点、目标传输点等组成，并共同实现其中的功能，但容易理解，它们在具体的实体设备中，都可以由处理器、收发机等具体的元器件来实现，下面对可能会位于不同实体设备上的各元器件的实现方式进行说明。
图11为网络侧设备结构示意图，如图所示，网络侧设备中包括：
处理器1100，用于读取存储器1120中的程序，执行下列过程：
确定终端向该目标传输点传输数据所需的上行定时提前量；
收发机1110，用于在处理器1100的控制下接收及发送数据，执行下列过程：
接收终端向网络侧发起的获取上行定时提前量的请求，所述上行定时提前量是该终端向目标传输点传输数据所需的上行定时提前量；
向终端返回携带有所述上行定时提前量的消息。
实施中，在接收终端向网络侧发起的获取上行定时提前量的请求时，收发机1110是通过如下网络侧实体之一接收的：
目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
实施中，对与终端进行数据传输的各传输点进行分组时，处理器1100采用以下方式之一或者其组合：
在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
实施中，在接收获取上行定时提前量请求为目标传输点，以及向终端返回携带有上行定时提前量的消息的网络侧设备为当前传输点时，当前传输点是通过目标传输点确定终端向该目标传输点传输数据所需的上行定时提前量的。
实施中，收发机1110进一步用于：
向终端返回携带有所述上行定时提前量的有效时长的消息。
实施中，确定终端向该目标传输点传输数据所需的上行定时提前量时，处理器1100采用以下方式之一或者其组合：
在接收获取上行定时提前量请求的网络侧设备为目标传输点时，根据对该终端发送的上行参考信号或上行传输信号进行的测量值确定；
在接收获取上行定时提前量请求的网络侧设备不为目标传输点时，根据该终端到当前传输点的定时提前量，目标传输点到终端或目标传输点到当前传输点的距离，以及目标传输点的传输频率之一或者其组合确定，其中，当前传输点是接收获取上行定时提前量请求的网络侧设备。
实施中，处理器1100进一步用于：
在网络侧确定上行定时提前量变更后，确定变更后的上行定时提前量；
通过收发机1110向终端发送上行定时提前量命令；
与终端启用变更后的上行定时提前量，并重启定时提前量定时器。
其中，在图11中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器1100代表的一个或多个处理器和存储器1120代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机1110可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器1100负责管理总线架构和通常的处理，存储器1120可以存储处理器1100在执行操作时所使用的数据。
综上所述，在本发明实施例提供的技术方案中，由终端选择网络侧传输点，根据需要向网络侧发起获取上行定时提前量过程。网络侧估计终端到目标传输点的定时提前量，并通知终端该定时提前量信息。
进一步的，方案中还提供了基于定时提前量的传输点分组及方案、终端获取到传输点的定时提前量的方案、定时提前量的维护方案。
通过本发明，可以有效实现终端灵活选择传输点时的上行传输。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样，倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (36)

  1. 一种获取上行定时提前量的方法，其特征在于，包括：
    确定终端需要传输数据的目标传输点；
    向网络侧发起获取上行定时提前量的请求，所述上行定时提前量是该终端向该目标传输点传输数据所需的上行定时提前量；
    根据网络侧返回的携带有上行定时提前量的消息确定该终端向该目标传输点传输数据所需的上行定时提前量。
  2. 如权利要求1所述的方法，其特征在于，在向网络侧发起获取上行定时提前量的请求时，是向如下网络侧实体之一发起：
    目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
  3. 如权利要求2所述的方法，其特征在于，对与终端进行数据传输的各传输点进行分组，包括以下方式之一或者其组合：
    在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
    在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
    在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
  4. 如权利要求1至3任一所述的方法，其特征在于，进一步包括以下方式之一或者其组合：
    在接收到网络侧返回的携带有上行定时提前量的消息后启动定时提前量定时器，当接收到新的定时提前量时重启定时提前量定时器，定时提前量定时器超时则发起获取上行定时提前量的请求；
    在终端移动时，根据与目标传输点的距离调整定时提前量；
    在目标传输点传输特性变化，或目标传输点变更时，发起获取上行定时提前量的请求。
  5. 如权利要求4所述的方法，其特征在于，所述定时提前量定时器是：从网络侧接收的定时提前量定时器，或采用协议规定的定时提前量定时器，或在终端内置的定时提前量定时器。
  6. 一种返回上行定时提前量的方法，其特征在于，包括：
    接收终端向网络侧发起的获取上行定时提前量的请求，所述上行定时提前量是该终端向目标传输点传输数据所需的上行定时提前量；
    确定终端向该目标传输点传输数据所需的上行定时提前量；
    向终端返回携带有所述上行定时提前量的消息。
  7. 如权利要求6所述的方法，其特征在于，在接收终端向网络侧发起的获取上行定时提前量的请求时，是如下网络侧实体之一接收的：
    目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
  8. 如权利要求7所述的方法，其特征在于，对与终端进行数据传输的各传输点进行分组，包括以下方式之一或者其组合：
    在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
    在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
    在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
  9. 如权利要求7或8所述的方法，其特征在于，在接收获取上行定时提前量请求为目标传输点，以及向终端返回携带有上行定时提前量的消息的网络侧设备为当前传输点时，当前传输点是通过目标传输点确定终端向该目标传输点传输数据所需的上行定时提前量的。
  10. 如权利要求6至8任一所述的方法，其特征在于，进一步包括：
    向终端返回携带有所述上行定时提前量的有效时长的消息。
  11. 如权利要求6至8任一所述的方法，其特征在于，确定终端向该目标传输点传输数据所需的上行定时提前量，包括以下方式之一或者其组合：
    在接收获取上行定时提前量请求的网络侧设备为目标传输点时，根据对该终端发送的上行参考信号或上行传输信号进行的测量值确定；
    在接收获取上行定时提前量请求的网络侧设备不为目标传输点时，根据该终端到当前传输点的定时提前量，目标传输点到终端或目标传输点到当前传输点的距离，以及目标传输点的传输频率之一或者其组合确定，其中，当前传输点是接收获取上行定时提前量请求的网络侧设备。
  12. 如权利要求6至8任一所述的方法，其特征在于，进一步包括：
    在网络侧确定上行定时提前量变更后，确定变更后的上行定时提前量；
    向终端发送上行定时提前量命令；
    与终端启用变更后的上行定时提前量，并重启定时提前量定时器。
  13. 一种获取上行定时提前量的装置，其特征在于，包括：
    传输点确定模块，用于确定终端需要传输数据的目标传输点；
    请求模块，用于向网络侧发起获取上行定时提前量的请求，所述上行定时提前量是该终端向该目标传输点传输数据所需的上行定时提前量；
    提前量确定模块，用于根据网络侧返回的携带有上行定时提前量的消息确定该终端向该目标传输点传输数据所需的上行定时提前量。
  14. 如权利要求13所述的装置，其特征在于，请求模块进一步用于向如下网络侧实体之一发起获取上行定时提前量的请求：
    目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
  15. 如权利要求14所述的装置，其特征在于，请求模块进一步用于在向与目标传输点属于同组的传输点发起获取上行定时提前量的请求时，所述组是按包括以下方式之一或者其组合的方式进行分组的：
    在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
    在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
    在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
  16. 如权利要求13至15任一所述的装置，其特征在于，进一步包括：
    维护模块，用于按以下方式之一或者其组合维护上行定时提前量：
    在接收到网络侧返回的携带有上行定时提前量的消息后启动定时提前量定时器，当接收到新的定时提前量时重启定时提前量定时器，定时提前量定时器超时则发起获取上行定时提前量的请求；
    在终端移动时，根据与目标传输点的距离调整定时提前量；
    在目标传输点传输特性变化，或目标传输点变更时，发起获取上行定时提前量的请求。
  17. 如权利要求16所述的装置，其特征在于，所述定时提前量定时器是：从网络侧接收的定时提前量定时器，或采用协议规定的定时提前量定时器，或在终端内置的定时提前量定时器。
  18. 一种返回上行定时提前量的系统，其特征在于，包括：
    接收模块，用于接收终端向网络侧发起的获取上行定时提前量的请求，所述上行定时提前量是该终端向目标传输点传输数据所需的上行定时提前量；
    确定模块，用于确定终端向该目标传输点传输数据所需的上行定时提前量；
    返回模块，用于向终端返回携带有所述上行定时提前量的消息。
  19. 如权利要求18所述的系统，其特征在于，接收模块位于如下网络侧实体之一：
    目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
  20. 如权利要求19所述的系统，其特征在于，进一步包括：
    分组模块，用于按包括以下方式之一或者其组合对与终端进行数据传输的各传输点进行分组：
    在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
    在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
    在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
  21. 如权利要求19或20所述的系统，其特征在于，确定模块位于当前传输点，进一步用于在接收模块位于目标传输点，以及返回模块位于为当前传输点时，通过目标传输点确定终端向该目标传输点传输数据所需的上行定时提前量。
  22. 如权利要求18至20任一所述的系统，其特征在于，返回模块进一步用于向终端返回携带有所述上行定时提前量的有效时长的消息。
  23. 如权利要求18至20任一所述的系统，其特征在于，确定模块进一步用于按以下方式之一或者其组合确定终端向该目标传输点传输数据所需的上行定时提前量：
    在接收获取上行定时提前量请求的网络侧设备为目标传输点时，根据对该终端发送的上行参考信号或上行传输信号进行的测量值确定；
    在接收获取上行定时提前量请求的网络侧设备不为目标传输点时，根据该终端到当前传输点的定时提前量，目标传输点到终端或目标传输点到当前传输点的距离，以及目标传输点的传输频率之一或者其组合确定，其中，当前传输点是接收获取上行定时提前量请求的网络侧设备。
  24. 如权利要求18至20任一所述的系统，其特征在于，进一步包括：
    更新模块，用于在网络侧确定上行定时提前量变更后，确定变更后的上行定时提前量；向终端发送上行定时提前量命令；与终端启用变更后的上行定时提前量，并重启定时提前量定时器。
  25. 一种获取上行定时提前量的装置，其特征在于，包括：
    处理器，用于读取存储器中的程序，执行下列过程：
    确定终端需要传输数据的目标传输点；
    根据网络侧返回的携带有上行定时提前量的消息确定该终端向该目标传输点传输数据所需的上行定时提前量；
    收发机，用于在处理器的控制下接收及发送数据，执行下列过程：
    向网络侧发起获取上行定时提前量的请求，所述上行定时提前量是该终端向该目标传输点传输数据所需的上行定时提前量；
    接收网络侧返回的携带有上行定时提前量的消息。
  26. 如权利要求25所述的装置，其特征在于，在向网络侧发起获取上行定时提前量的请求时，收发机是向如下网络侧实体之一发起：
    目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
  27. 如权利要求26所述的装置，其特征在于，对与终端进行数据传输的各传输点进行分组时，处理器采用以下方式之一或者其组合：
    在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
    在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
    在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
  28. 如权利要求25至27中任一所述的装置，其特征在于，收发机进一步执行以下方式之一或者其组合：
    在接收到网络侧返回的携带有上行定时提前量的消息后启动定时提前量定时器，当接收到新的定时提前量时重启定时提前量定时器，定时提前量定时器超时则发起获取上行定时提前量的请求；
    在终端移动时，根据与目标传输点的距离调整定时提前量；
    在目标传输点传输特性变化，或目标传输点变更时，发起获取上行定时提前量的请求。
  29. 如权利要求28所述的装置，其特征在于，所述定时提前量定时器是：从网络侧接收的定时提前量定时器，或采用协议规定的定时提前量定时器，或在终端内置的定时提前量定时器。
  30. 一种返回上行定时提前量的装置，其特征在于，包括：
    处理器，用于读取存储器中的程序，执行下列过程：
    确定终端向该目标传输点传输数据所需的上行定时提前量；
    收发机，用于在处理器的控制下接收及发送数据，执行下列过程：
    接收终端向网络侧发起的获取上行定时提前量的请求，所述上行定时提前量是该终端向目标传输点传输数据所需的上行定时提前量；
    向终端返回携带有所述上行定时提前量的消息。
  31. 如权利要求30所述的装置，其特征在于，在接收终端向网络侧发起的获取上行定时提前量的请求时，收发机是通过如下网络侧实体之一接收的：
    目标传输点、当前传输点、与目标传输点属于同组的传输点，其中，所述组是根据终端向属于同组的传输点传输数据时使用的上行定时提前量确定的，当前传输点是当前与终端进行数据传输的传输点。
  32. 如权利要求31所述的装置，其特征在于，对与终端进行数据传输的各传输点进行分组时，处理器采用以下方式之一或者其组合：
    在网络侧按区域内确定可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
    在终端向网络侧反馈可能与终端进行数据传输的传输点后，根据终端与每个传输点进行数据传输所需的上行定时提前量对传输点进行分组；
    在终端查找当前区域内可能的传输点，测量各传输点的下行信号，根据下行信号估计上行定时提前量后进行分组。
  33. 如权利要求31或32所述的装置，其特征在于，在接收获取上行定时提前量请求为目标传输点，以及向终端返回携带有上行定时提前量的消息的网络侧设备为当前传输点时，当前传输点是通过目标传输点确定终端向该目标传输点传输数据所需的上行定时提前量的。
  34. 如权利要求30至32任一所述的装置，其特征在于，收发机进一步用于：
    向终端返回携带有所述上行定时提前量的有效时长的消息。
  35. 如权利要求30至32任一所述的装置，其特征在于，确定终端向该目标传输点传输数据所需的上行定时提前量时，处理器采用以下方式之一或者其组合：
    在接收获取上行定时提前量请求的网络侧设备为目标传输点时，根据对该终端发送的上行参考信号或上行传输信号进行的测量值确定；
    在接收获取上行定时提前量请求的网络侧设备不为目标传输点时，根据该终端到当前传输点的定时提前量，目标传输点到终端或目标传输点到当前传输点的距离，以及目标传输点的传输频率之一或者其组合确定，其中，当前传输点是接收获取上行定时提前量请求的网络侧设备。
  36. 如权利要求30至32任一所述的装置，其特征在于，处理器进一步用于：
    在网络侧确定上行定时提前量变更后，确定变更后的上行定时提前量；
    通过收发机向终端发送上行定时提前量命令；
    与终端启用变更后的上行定时提前量，并重启定时提前量定时器。
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