WO2013044866A1 - Procédé, dispositif et système d'obtention de différence de temps de synchronisation - Google Patents

Procédé, dispositif et système d'obtention de différence de temps de synchronisation Download PDF

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Publication number
WO2013044866A1
WO2013044866A1 PCT/CN2012/082423 CN2012082423W WO2013044866A1 WO 2013044866 A1 WO2013044866 A1 WO 2013044866A1 CN 2012082423 W CN2012082423 W CN 2012082423W WO 2013044866 A1 WO2013044866 A1 WO 2013044866A1
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WIPO (PCT)
Prior art keywords
base station
time difference
synchronization time
synchronization
terminal
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PCT/CN2012/082423
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English (en)
Chinese (zh)
Inventor
肖登坤
蔺波
杨青
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华为技术有限公司
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Publication of WO2013044866A1 publication Critical patent/WO2013044866A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a synchronization information acquisition method, apparatus, and system. Background technique
  • LTE-A Long Term Evolution Advance
  • LPN low power node
  • a low power node and a macro base station together form a heterogeneous network.
  • the base stations that cover the same interfere with each other. Therefore, interference coordination needs to be performed on the heterogeneous network.
  • the inventors of the present invention found that the synchronization time difference between the two base stations has a certain relationship with the search performance of the cell and whether the interference coordination can be more accurate, but in the prior art In the synchronous network or the asynchronous network, the clocks of the base stations are not accurately synchronized, and there is no related technology in the prior art on how to acquire synchronization information between the base stations. Summary of the invention
  • Embodiments of the present invention provide a synchronization time difference acquisition method, apparatus, and system, which can acquire a synchronization time difference between two base stations.
  • a synchronization time difference acquisition method including:
  • the terminal respectively detects a first path arrival time of the signals transmitted by the at least two base stations;
  • a synchronization time difference acquisition method including:
  • the synchronization time difference is transmitted to the macro base station.
  • a communication device including:
  • a detecting unit configured to respectively detect a first path arrival time of a signal transmitted by the at least two base stations; and a calculating unit, configured to calculate a synchronization time difference according to a first path arrival time of the signals transmitted by the at least two base stations;
  • a sending unit configured to send the synchronization time difference to a serving base station of the terminal.
  • a communication device including:
  • a detecting unit configured to detect a frame header position of a signal transmitted by the base station
  • a calculating unit configured to calculate a synchronization time difference according to a frame header position of the signal transmitted by the base station; and a sending unit, configured to send the synchronization time difference to the macro base station.
  • a communication system including a base station and any one of the communication devices provided by the embodiments of the present invention
  • a base station configured to receive a synchronization time difference sent by the communications device.
  • the first path arrival time of the signal transmitted by the base station or the frame header position of the signal transmitted by the base station is used, according to the first path arrival time of the signal transmitted by the base station or the signal transmitted by the base station.
  • the frame header position calculates the synchronization time difference, and then sends the synchronization time difference to the detected base station, so that the base station can acquire the synchronization time difference between the base station and the base station having its own X2 interface, so that the related processing can be performed according to the synchronization time difference, for example. And improving the search performance of the cell, the interference coordination capability, and the like based on the synchronization time difference.
  • the method for detecting the PSS/SSS information of the macro base station by the LPN obtains the time difference, and only transmits the time difference from the LPN to the macro base station, thereby saving signaling overhead.
  • the present invention also proposes another method, that is, performing measurement from the UE side, and obtaining a first-path arrival time difference between the RSRP, the RSRQ, and the base station, and reporting it to the base station.
  • FIG. 2a is a schematic diagram of a network scenario when a terminal calculates a synchronization time difference
  • FIG. 3a is a schematic diagram of a network scenario when a synchronization time difference is calculated by a low power node
  • FIG. 4a is a schematic structural diagram of a network device according to an embodiment of the present invention
  • FIG. 4b is another schematic structural diagram of a network device according to an embodiment of the present invention. detailed description
  • Embodiments of the present invention provide a synchronization information acquisition method, apparatus, and system. The following is a detailed description.
  • This embodiment is a method embodiment of the present invention. In this embodiment, it will be described from the perspective of a communication device, where the communication device may be a terminal or a low power node.
  • a method for acquiring a synchronization time difference comprising: detecting a first path arrival time of a base station signal or a synchronization point of a signal generated by a base station; calculating a synchronization time difference according to a detected first path arrival time of the base station signal or a synchronization point of the base station generating a signal; The synchronization time difference is sent to the base station.
  • Step 101 Detect a first path arrival time of a signal transmitted by a base station or a synchronization point of a signal generated by a base station
  • the synchronization point at which the base station generates a signal refers to the position of the frame header of the signal transmitted by the base station); for example, it can be specifically:
  • the terminal respectively detects a first path arrival time of signals transmitted from at least two base stations; or
  • the low power node obtains a synchronization point of the signal generated by the macro base station by detecting a primary synchronization signal (PSS, Primary Synchronization Signal) and a secondary synchronization signal (SSS) sent by the macro base station.
  • PSS Primary Synchronization Signal
  • SSS secondary synchronization signal
  • the first path arrival time refers to the time when the first path of the signal transmitted by the base station reaches the terminal, and the synchronization point generated by the macro base station refers to the frame header position of the signal transmitted by the macro base station.
  • Step 102 Calculate a synchronization time difference according to the detected first-path arrival time of the signal transmitted by the base station or the synchronization point of the signal generated by the base station; as follows:
  • step 102 may specifically be:
  • the terminal compares the detected first-path arrival times of the signals transmitted by the at least two base stations to obtain a synchronization time difference. For example, if the base station 1 and the base station 2 are mutually adjacent base stations, the base station 1 and the base station 2 are located within the same coverage area.
  • the terminal may detect the first path arrival time of the signal transmitted by the base station 1 and the first path arrival time of the signal transmitted by the base station 2, wherein the first path arrival time of the signal transmitted by the base station 1 is detected as 00:00:00:000 The first path arrival time of the signal transmitted by the base station 2 is 00:00:00:001, then the terminal compares the arrival times of the two first paths, and the synchronization time difference is lms (milliseconds).
  • step 102 may specifically be:
  • the low power node compares the obtained synchronization point of the signal generated by the macro base station with the synchronization point of the locally generated signal to obtain a synchronization time difference. For example, if the macro base station 1 and the low power node are mutually adjacent base stations, the low power node can acquire the synchronization point of the signal generated by the macro base station, for example, when the time of the macro base station is 00:00:00:000, the time of the low power node. It is 00:00:00:001. At this time, the low power node compares the two times to know that the synchronization time difference between the low power node and the macro base station is 1 ms.
  • Step 103 Send the synchronization time difference obtained in step 102 to the detected base station; for example, if in step 102, the synchronization time difference is calculated by the terminal, then step 103 may specifically be: :
  • the terminal carries the synchronization time difference by adding a new message element (IE, Information Element) to the message reported by the terminal, so as to separately send the synchronization time difference to the two adjacent base stations.
  • IE Identifier
  • the terminal may also send the synchronization time difference to the two adjacent base stations detected by an independent message. or,
  • Step 103 may specifically be: the terminal sends the obtained synchronization time difference to the service base station of the terminal, or
  • the terminal transmits the obtained synchronization time difference to the serving base station of the terminal.
  • the terminal may send the synchronization time difference to the serving base station of the terminal by using the message element IE for carrying the synchronization time difference in the message reported to the serving base station at the terminal.
  • the terminal may also send the synchronization time difference to the serving base station of the terminal through an independent message.
  • the serving base station that obtains the synchronization time difference can also transmit the synchronization time difference to other base stations through the X2 interface.
  • step 103 may specifically be:
  • the low power node sends the calculated synchronization time difference to the macro base station through the X2 port.
  • the low power node may send the synchronization time difference through the message element IE for carrying the synchronization time difference in the signaling of the X2 port.
  • the macro base station details as follows:
  • a new IE is added to the signaling of the X2 port to carry the synchronization time difference, and then the low power node transmits the synchronization time difference to the macro base station through the new IE.
  • the low power node can also send the synchronization time difference to the macro base station through the signaling of the newly defined X2 port.
  • the signaling of the X2 port may specifically be: an X2 setup request (X2 SETUP REQUEST), an X2 setup response (X2 SETUP RESPONSE), a base station configuration correction (ENB CONFIGURATION UPDATE), a base station configuration correction notification (ENB CONFIGURATION UPDATE ACKNOWLEDGE), a cell Activation request (CELL ACTIVATION REQUEST) or cell activation response (CELL ACTIVATION RESPONSE), and so on.
  • the synchronization time difference acquisition method may further include: Determine that the synchronization time difference is greater than the set synchronization time difference threshold.
  • the synchronization time difference threshold can be set according to the actual application requirements.
  • the first path arrival time of the signal transmitted by the base station or the synchronization point of the signal generated by the base station is used, and the synchronization time difference is calculated according to the first path arrival time of the signal transmitted by the base station or the synchronization point of the signal generated by the base station, and then The synchronization time difference is sent to the detected base station, so that the base station can acquire the synchronization time difference between itself and the neighboring base station (that is, the base station having the X2 interface with itself), so that the related processing can be performed according to the synchronization time difference, for example, based on This synchronization time difference improves the search performance of the cell, as well as interference coordination capabilities, and the like.
  • This embodiment is another method embodiment provided by an embodiment of the present invention.
  • the network device As a terminal.
  • base station 1 and base station 2 are adjacent base stations, and terminal A is located under the common coverage of base station 1 and base station 2.
  • the specific process can be as follows:
  • Step 201 Terminal A detects a first path arrival time of a signal from the base station 1 and a first path arrival time of the signal from the base station 2, respectively.
  • the first path arrival time of the signal from the base station 1 detected by the terminal A is 00:00:00:000
  • the first path arrival time of the signal from the base station 2 is 00:00:00:001.
  • Step 202 Terminal A compares the detected first path arrival time of the signal from the base station 1 with the first path arrival time of the signal from the base station 2, to obtain a synchronization time difference;
  • Step 102 the first path arrival time of the signal from the base station 1 detected by the terminal A is 00:00:00:000, and the first path arrival time of the signal from the base station 2 is 00:00:00:001.
  • terminal A can compare the arrival times of the two first paths, and calculate the difference between the two time points as 1 ms. Therefore, it can be concluded that the synchronization time difference between the base station 1 and the base station 2 is lms.
  • Step 203 Step 203: The terminal A reports the obtained synchronization time difference to the base station 1 and the base station 2 together with the reference signal received power (RSRP, Reference Signal Receiving Power) and the reference signal received quality (RSRQ, Reference Signal Received Quality).
  • RSRP Reference Signal received power
  • RSRQ Reference Signal Received Quality
  • the terminal In the prior art, the terminal generally needs to measure the parameters such as the RSRP and the RSRQ of the serving base station, and then report the parameters to the serving base station. Therefore, the synchronization time difference obtained in step 202 can be carried in the reporting message of parameters such as RSRP and RSRQ. It is sent to base station 1 and base station 2. For example, you can pass A new IE is added to the message reported by the terminal to carry the synchronization time difference to be reported. For example, in the MeasConfig information element, a new IE can be added to carry the synchronization time difference that needs to go to work.
  • the terminal A can also report the obtained synchronization time difference to the serving base station of the terminal together with the reference signal received power and the reference signal receiving quality, and then transmitted by the serving base station to the other base stations through the X2 interface, where Narration.
  • the size of the synchronization time difference obtained in step 202 may also be determined, as follows:
  • the terminal A determines whether the synchronization time difference is greater than the set synchronization time difference threshold. If yes, step 203 is performed; otherwise, the process ends.
  • the threshold value of the synchronization time difference may be set to 200 ⁇ s (microseconds). Then, if the synchronization time difference obtained in step 202 is lms, the terminal A needs to send the synchronization time difference to the base station 1 and the base station 2 ( That is, step 203) is performed, but if the obtained synchronization time difference is 2.5 ⁇ s in step 202, the terminal ⁇ may not transmit the synchronization time difference to the base station 1 and the base station 2 (ie, step 203 is not performed), and so on. and many more.
  • the terminal A detects the first path arrival time of the signals transmitted by the at least two base stations, and then calculates the synchronization time difference according to the first path arrival time of the signals transmitted by the at least two base stations, and then synchronizes the time difference.
  • the base station 1 and the base station 2 are sent to the detected base station 1 and the base station 2, so that the base station 1 and the base station 2 can obtain the synchronization time difference between themselves and the neighboring base station (that is, the base station having the X2 interface with itself), so that the synchronization time difference can be subsequently performed according to the synchronization time difference.
  • Correlation processing for example, improves the search performance of the cell based on the synchronization time difference, as well as interference coordination capability, and the like.
  • This embodiment is another method embodiment provided by an embodiment of the present invention.
  • the low-power node In a heterogeneous network, although the low-power node itself acts as a base station, it can also be regarded as a receiver, which can receive the primary synchronization signal (PSS, Primary Synchronization Signal) and secondary synchronization sent by the macro base station. Signal (SSS, Secondary Synchronization Signal). Therefore, the communication device can also be a low power node.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • the specific low power point of the communication device will be described as an example.
  • the low power node 1 and the macro base station 2 are neighboring base stations, and the low power node 1 is located within the coverage of the macro base station 2 (ie, the signal of the macro base station 2 can be received), see Figure 3b, the specific process can be as follows:
  • Step 301 The low power node 1 obtains a synchronization point of the signal generated by the macro base station 2 by detecting the primary synchronization signal and the secondary synchronization signal transmitted by the macro base station 2.
  • the time point at which the low power node 1 detects the primary synchronization signal or the secondary synchronization signal sent by the macro base station 2 is: 00:00:00:000 (ie, the synchronization point of the signal generated by the macro base station 2 is: 00:00:00: 000);
  • the low power node 1 itself time point is: 00:00:00:001 (that is, the synchronization point of the locally generated signal is: 00:00:00:001), then the low power node 1 according to these two Step 302 is performed at each time point.
  • Step 302 The low power node 1 compares the obtained synchronization point of the signal generated by the macro base station 2 with the synchronization point of the locally generated signal to obtain a synchronization time difference.
  • step 301 the low power node 1 detects that the synchronization point of the signal generated by the macro base station 2 is 00:00:00:000, and the synchronization point of the signal generated locally by the low power node 1 is: 00:00:00:001 Then, comparing the two synchronization points, the time difference between the two is 1 ms. Therefore, the synchronization time difference can be obtained as lms, and then step 303 is performed.
  • Step 303 The low-power node 1 sends the obtained synchronization time difference to the macro base station 2 through the X2 port.
  • a new IE may be added to the signaling of the X2 port to carry the synchronization time difference, where the X2 port letter
  • the specifics may be: X2 setup request, X2 setup response, base station configuration correction, base station configuration correction notification, cell activation request or cell activation response, and the like.
  • the synchronization time difference obtained in step 302 may also be determined, as follows:
  • the low power node 1 determines whether the synchronization time difference is greater than the set synchronization time difference threshold. If yes, step 303 is performed; otherwise, the process ends.
  • the threshold value of the synchronization time difference can be set to 200 ⁇ s. Then, if the synchronization time difference obtained in step 302 is lms, the low power node 1 needs to send the synchronization time difference to the macro base station 2 (ie, step 303 is performed). ), but if the obtained synchronization time difference is 2.5 ⁇ s in step 202, the low power node 1 may not transmit the synchronization time difference to the macro base station 2 (ie, does not perform step 303), and so on, and so on.
  • the synchronization point of the signal generated by the macro base station is detected by the low power node 1, and then the synchronization time difference is calculated according to the synchronization point of the signal generated by the macro base station, and the synchronization time difference is transmitted to the detected macro base station 2 So that the macro base station 2 can acquire the synchronization time difference between itself and the neighboring base station, so that the related processing can be performed according to the synchronization time difference, for example, based on This synchronization time difference improves the search performance of the cell, as well as interference coordination capabilities, and the like.
  • the above method for obtaining the synchronization time difference can be specifically applied to the cell search method and the interference coordination method to provide system performance.
  • the base station can select a suitable blank frame mode to send to the terminal according to the synchronization time difference, so that the cell search time can be shortened compared to the randomly selected blank frame sent to the terminal, thereby saving the power of the terminal.
  • the base station can select a suitable blank frame mode to send to the terminal according to the synchronization time difference, so that the cell search time can be shortened compared to the randomly selected blank frame sent to the terminal, thereby saving the power of the terminal.
  • the terminal respectively detects the first path arrival time of the signals from the plurality of base stations; the terminal compares the detected multiple path arrival times by two to obtain a synchronization time difference between any two base stations; for example, located at The base station 1, the base station 2, and the base station 3 can detect the first arrival time of the signal of the base station 1, the first arrival time of the signal of the base station 2, and the first arrival time of the signal of the base station 3, respectively.
  • the first path arrival time of the signal of the base station 1 is detected as 00: 00: 00: 000
  • the first path arrival time of the signal of the base station 2 is 00: 00: 00: 001
  • the first path arrival time of the signal of the base station 3 is 00 :00:00:002
  • the terminal compares the arrival times of the three first-paths in pairs, and the synchronization time difference between the base station 1 and the base station 2 is lms (milliseconds), and the synchronization between the base station 1 and the base station 3
  • the time difference is 2 ms
  • the synchronization time difference between the base station 2 and the base station 3 is lms;
  • the terminal transmits the obtained synchronization time difference between the two base stations to the corresponding two base stations respectively; for example, Transmitting the synchronization time difference between the base station 1 and the base station 2 obtained in step 102 to the base station 1 and the base station 2, respectively, and transmitting the synchronization time difference between the base station 1
  • the base station selects an appropriate transmission format to transmit almost blank subframes according to the synchronization time difference between the base station and other base stations, thereby improving cell search performance and achieving system optimization.
  • This embodiment is an apparatus embodiment provided by an embodiment of the present invention.
  • the embodiment of the present invention further provides a communication device.
  • the communication device includes a detecting unit 401, a calculating unit 402, and a sending unit 403.
  • the detecting unit 401 is configured to detect a first path arrival time of a signal transmitted by the base station or a frame head position of the signal transmitted by the base station (that is, a synchronization point at which the base station generates a signal);
  • the calculating unit 402 is configured to calculate a synchronization time difference according to the first path arrival time of the signal transmitted by the base station detected by the detecting unit 401 or the frame head position of the signal transmitted by the base station;
  • the sending unit 403 is configured to send the synchronization time difference obtained by the calculating unit 402 to the detected base station.
  • the communication device may specifically be as follows:
  • the detecting unit 401 is specifically configured to separately detect a first path arrival time of the signals transmitted by the at least two base stations;
  • the calculating unit 402 is configured to calculate a synchronization time difference according to the first path arrival time of the signals transmitted by the at least two base stations obtained by the detecting unit 401, for example, the detected first path arrival times of the signals transmitted by the at least two base stations may be compared, Get the synchronization time difference;
  • the detection unit 401 of the terminal located in the coverage area of the base station 1 and the base station 2 can respectively transmit the first path arrival time of the signal transmitted by the base station 1 and the signal transmitted by the base station 2.
  • the first path arrival time is detected, wherein the first path arrival time of the signal transmitted by the base station 1 is detected as 00:00:00:000, and the first path arrival time of the signal transmitted by the base station 2 is 00:00:00:001.
  • the calculation unit 402 of the terminal compares the arrival times of the two first paths, and the synchronization time difference is lms (milliseconds).
  • the sending unit 403 is specifically configured to send the synchronization time difference obtained by the calculating unit 402 to the serving base station of the terminal, or may send the synchronization time difference obtained by the calculating unit 402 to the detected two base stations.
  • the synchronization time difference may be carried by adding a new IE to the message reported by the terminal, that is,
  • the sending unit 403 is specifically configured to send the synchronization time difference to the serving base station of the terminal by using a message element IE for carrying the synchronization time difference in the message of the serving base station on the terminal.
  • the sending unit 403 may be specifically configured to carry a synchronization time difference by adding a new IE to the message on the terminal, so as to separately send the synchronization time difference to the detected two base stations.
  • the sending unit 403 sends the synchronization time difference obtained by the calculating unit 402 to the serving base station of the terminal, the serving base station that obtains the synchronization time difference can subsequently transmit the synchronization time difference to other base stations through the X2 interface.
  • the communication device may specifically be a terminal or other device having similar functions to the terminal.
  • the detecting unit 401 is specifically configured to detect a frame header position of the signal transmitted by the base station, for example, specifically, by detecting a primary synchronization signal PSS and a secondary synchronization signal SSS sent by the macro base station, to obtain a synchronization point of the signal generated by the macro base station;
  • the calculating unit 402 is specifically configured to calculate a synchronization time according to a frame header position of a signal transmitted by the base station For example, if the detecting unit 401 detects the synchronization point of the signal generated by the macro base station by detecting the primary synchronization signal PSS and the secondary synchronization signal SSS transmitted by the macro base station, the calculation unit 402 can generate the signal of the obtained macro base station. The synchronization point is compared with the synchronization point of the locally generated signal to obtain a synchronization time difference;
  • the detecting unit 401 of the low power node can acquire the synchronization point of the signal generated by the macro base station, for example, when the time of the macro base station is 00:00:00:000, the low power The time of the node is 00:00:00:001. Then, the calculation unit 402 of the low power node compares the two times, and the synchronization time difference between the low power node and the macro base station 1 is 1 ms.
  • the sending unit 403 is specifically configured to send the synchronization time difference to the macro base station.
  • the synchronization time difference may be sent to the macro base station through the X2 port.
  • the synchronization time difference can be specifically added by adding a new IE to the signaling of the X2 port, that is,
  • the sending unit 403 is specifically configured to send the synchronization time difference to the macro base station by using a message element IE for carrying the synchronization time difference in signaling of the X2 port.
  • the communication device may specifically be a low power node or other device having similar functions to the low power node.
  • the communication device may further include a determining unit 404;
  • the determining unit 404 is configured to determine whether the synchronization time difference is greater than the set synchronization time difference threshold.
  • the sending unit 403 is configured to: when the determining unit 404 determines that the synchronization time difference is greater than the set synchronization time difference threshold, send the synchronization time difference to the base station, For example, the synchronization time difference is transmitted to the serving base station of the terminal, or the synchronization time difference is transmitted to the macro base station, and the like.
  • the transmitting unit 403 may not transmit the synchronization time difference to the base station.
  • each of the above units may be implemented as a separate entity, or may be implemented in any combination as one or several entities.
  • the detecting unit 401 of the communication device of this embodiment can detect the first path arrival time of the signal transmitted by the base station or the frame header position of the signal transmitted by the base station, and then the calculating unit 402 according to the first path arrival time of the signal transmitted by the base station.
  • the frame header position of the signal transmitted by the base station calculates a synchronization time difference
  • the transmitting unit 403 sends the synchronization time difference to the detected base station, so that the base station can acquire itself and the neighboring base station (ie, the base station having the X2 interface with the base station)
  • the synchronization time difference between the two is such that the correlation processing can be performed according to the synchronization time difference, for example, improving the search performance of the cell based on the synchronization time difference, and the interference coordination capability, and the like.
  • This embodiment is a system embodiment provided by an embodiment of the present invention.
  • the embodiment of the present invention further provides a communication system, including any communication device provided by the embodiment of the present invention.
  • the communication system may further include a base station;
  • a communication device configured to detect a first-path arrival time of a signal transmitted by the base station or detect a frame header position of the signal transmitted by the base station (ie, detect a synchronization point at which the base station generates a signal), according to the detected first-path arrival time of the signal transmitted by the base station or Calculating a synchronization time difference by a frame header position of a signal transmitted by the base station, and transmitting a synchronization time difference to the base station;
  • a base station configured to receive a synchronization time difference sent by the communications device.
  • the base station may perform correlation processing based on the synchronization time difference, for example, improving the search performance of the cell based on the synchronization time difference, and the interference coordination capability, and the like.
  • the base station may specifically include a first base station and a second base station
  • the communication device is specifically a terminal
  • the communication system may include a first base station, a second base station, and a terminal
  • a first base station configured to receive a synchronization time difference sent by the terminal
  • a second base station configured to receive a synchronization time difference sent by the terminal
  • a terminal configured to respectively detect a first path arrival time of a signal from the first base station, and a first path arrival time of the signal from the first base station, and compare the detected arrival times of the two first paths to obtain a synchronization time difference, which will be obtained.
  • the synchronization time difference is sent to the first base station and the second base station, respectively.
  • the terminal may carry the synchronization time difference by adding a new IE to the message on the terminal, so that the synchronization time difference is separately sent to the first base station and the second base station.
  • the base station may be a macro base station, and the communication device is specifically a low power node, that is, the communication system may include a macro base station and a terminal; a macro base station, configured to receive a synchronization time difference sent by the low power node;
  • a low power node configured to detect a synchronization point of a signal generated by the macro base station by detecting a primary synchronization signal and a secondary synchronization signal sent by the macro base station, and compare the synchronization point of the generated signal generated by the macro base station with a synchronization point of the locally generated signal, The synchronization time difference is sent to the macro base station through the X2 port.
  • a new IE may be added to the signaling of the X2 port to carry the synchronization time difference, so as to send the synchronization time difference to the macro base station.
  • the signaling of the X2 port may specifically include an X2 establishment request, an X2 establishment response, a base station configuration correction, a base station configuration correction notification, a cell activation request, or a cell activation response, and the like.
  • the communication device in the communication system of this embodiment can detect the first path arrival time of the signal transmitted by the base station or the frame header position of the signal transmitted by the base station, and then according to the first path arrival time of the signal transmitted by the base station or the base station transmits the time.
  • the frame header position of the signal calculates a synchronization time difference, and sends the synchronization time difference to the detected base station, so that the base station can acquire the synchronization time difference between itself and the neighboring base station (ie, the base station having the X2 interface with itself), so that the subsequent time can be Correlation processing is performed according to the synchronization time difference, for example, improving the search performance of the cell based on the synchronization time difference, and the interference coordination capability, and the like.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: Read Only Memory (ROM), Random Access Memory (RAM), disk or optical disk.
  • ROM Read Only Memory
  • RAM Random Access Memory

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne un procédé, un dispositif et un système d'obtention de différence de temps de synchronisation. Selon un mode de réalisation de la présente invention, un temps d'arrivée d'un premier trajet d'un signal transmis par une station de base ou une position d'en-tête de trame d'un signal transmis par la station de base est détecté(e), une différence de temps de synchronisation est calculée selon le temps d'arrivée sur le premier trajet du signal transmis par la station de base ou la position d'en-tête de trame du signal transmis par la station de base, puis la différence de temps de synchronisation est envoyée à la station de base détectée, de telle sorte que la station de base peut obtenir la différence de temps de synchronisation entre la station de base et une station de base ayant une interface X2 entre elles, et un traitement pertinent peut être réalisé par la suite selon la différence de temps de synchronisation. Par exemple, les performances de recherche et la capacité de coordination d'interférence d'une cellule sont améliorées sur la base de la différence de temps de synchronisation.
PCT/CN2012/082423 2011-09-29 2012-09-29 Procédé, dispositif et système d'obtention de différence de temps de synchronisation WO2013044866A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110293439.4 2011-09-29
CN2011102934394A CN103037406A (zh) 2011-09-29 2011-09-29 同步时间差获取方法、装置和系统

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CN105897330A (zh) * 2016-04-01 2016-08-24 严炜 一种用于uwb高精度定位系统的信号同步方法
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CN114114325B (zh) * 2021-04-22 2022-07-22 中国电信股份有限公司 校准方法、装置以及系统

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EP2063553A1 (fr) * 2007-11-20 2009-05-27 Research In Motion Limited Système et procédé de synchronisation des temps
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CN102136863A (zh) * 2010-12-28 2011-07-27 大唐移动通信设备有限公司 准空白子帧处理和实现基站间同步的方法及设备

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CN101669341A (zh) * 2007-04-30 2010-03-10 Lm爱立信电话有限公司 Ofdm系统中的同步时间差测量
EP2063553A1 (fr) * 2007-11-20 2009-05-27 Research In Motion Limited Système et procédé de synchronisation des temps
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