CN108964819B - A kind of clock adjustment, clock jitter calculation method, equipment and system - Google Patents

Abstract

Embodiments of the present application provide a method, device, and system for clock adjustment and clock offset calculation, which relate to the field of communication technologies and can improve the synchronization accuracy between a terminal and an access network device. The specific solution is: the terminal sends the first signal to the access network device; receives the first time value and signal time offset sent by the access network device, the first time value indicates the moment when the access network device receives the first signal, and the signal time offset Including the residual time offset Δt, the absolute value of Δt is smaller than the timing advance TA adjustment granularity; according to the first time value, signal time offset and second time value, calculate the clock deviation, the second time value indicates the time when the terminal sends the first signal, the clock The deviation is the time difference between the first clock configured in the terminal and the second clock configured in the access network device; the first clock is adjusted according to the clock deviation. This embodiment of the application is used to synchronize clocks.

Description

Method, device and system for clock adjustment and clock deviation calculation

technical field

The embodiments of the present application relate to the technical field of communications, and in particular, to a method, device, and system for clock adjustment and clock offset calculation.

Background technique

In the field of industrial manufacturing, in order to cooperate to complete a certain production task, multiple industrial devices need to maintain high-precision clock synchronization. The future of industrial manufacturing is intelligence and networking, and wireless communication instead of wired communication is the future development trend. Cellular network technology will become the preferred technology direction for industrial wireless due to its reliable link-level performance, complete function and feature support, and a mature and complete industrial chain. However, in the current cellular network technology, there is no clear clock synchronization solution.

In the existing wireless synchronization technology, base station 1 and base station 2 in the network respectively record the absolute time T1 and T2 of the arrival of the same uplink message sent by the same terminal, and calculate the transmission delay Tp1 and Tp2 of the message. Among them, T1-Tp1 is based on the local clock of base station 1, and calculates the sending time of the uplink message. T2-Tp2 is based on the local clock of base station 2, and calculates the sending time of the uplink message. The two sending times The difference (T1-Tp1)-(T2-Tp2) is the clock offset between base station 1 and base station 2. The transmission delays Tp1 and Tp2 are respectively replaced by 1/2 of the first timing advance (TA) corresponding to the terminal and base station 1 and 1/2 of the second timing advance (TA) corresponding to the terminal and base station 2 .

The above solution in the prior art solves the problem of clock synchronization between base stations, but cannot solve the clock synchronization of the entire network, especially the clock synchronization between the time of the base station and the terminal. Moreover, TA is designed for demodulation of uplink data, and the quantization unit of TA is TA adjustment granularity. The TA adjustment granularity is usually relatively large. For example, at a 20MHz bandwidth and a _30.72MHz sampling rate, the TA adjustment granularity is _16TS (TS is the sampling period), that is, 0.52μs. Therefore, using the TA value instead of the transmission delay will make the calculation of the transmission delay and clock deviation limited by the size of the TA adjustment granularity, thus making the synchronization accuracy poor.

Contents of the invention

Embodiments of the present application provide a method, device, and system for clock adjustment and clock offset calculation, which can improve the synchronization accuracy between a terminal and an access network device.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

In a first aspect, an embodiment of the present application provides a clock adjustment method, including: a terminal sends a first signal to an access network device. Then, the terminal receives the first time value and signal time offset sent by the access network device. Wherein, the first time value indicates the time when the access network device receives the first signal, the signal time offset includes a residual time offset Δt, and the absolute value of Δt is smaller than the timing advance TA adjustment granularity. Afterwards, the terminal calculates the clock deviation according to the first time value, the signal time offset and the second time value. Wherein, the second time value indicates the time when the terminal sends the first signal, and the clock offset is a time difference between the first clock configured in the terminal and the second clock configured in the access network device. Furthermore, the terminal adjusts the first clock according to the clock deviation.

In this way, the terminal can calculate the clock offset according to Δt whose absolute value is smaller than the TA adjustment granularity, so that the calculation of the clock offset will not be limited by the size of the TA adjustment granularity, thereby improving the calculation accuracy of the clock offset, and then adjusting the terminal according to the clock offset The corresponding first clock, so that when the first clock is synchronized with the second clock corresponding to the access network device, the synchronization accuracy can be improved.

With reference to the first aspect, in a possible implementation manner, the signal time offset further includes a timing advance TA adjustment value ΔTA, where ΔTA is an integer multiple of the TA adjustment granularity. In this way, the clock skew can be calculated from ΔTA and Δt.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal is a preamble (Preamble) sequence, and the method further includes: the terminal sets an initial value of TA according to ΔTA. In this way, clock synchronization can be achieved through the random access procedure.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the terminal stores the timing advance TA, and the method further includes: the terminal adjusts the TA according to ΔTA. In this way, the TA can also be updated while implementing clock synchronization.

In combination with the first aspect and the above possible implementation manners, in another possible implementation manner, the terminal receiving the first time value and signal time offset sent by the access network device includes: the terminal receiving the second signal sent by the access network device , the second signal carries the first time value and the signal time offset; or the terminal receives the third signal and the fourth signal sent by the access network device, the third signal carries the first time value, and the fourth signal carries the Signal time skew. In this way, the transmission mode of the first time value and the signal time offset can be made more flexible.

In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the terminal receiving the first time value and signal time offset sent by the access network device includes: the terminal receiving the fifth signal sent by the access network device and the sixth signal, the fifth signal carries ΔTA in the signal time offset, and the sixth signal carries the first time value and Δt in the signal time offset; or, the terminal receives the seventh signal sent by the access network device, For the eighth signal and the ninth signal, the seventh signal carries ΔTA in the signal time offset, the eighth signal carries Δt in the signal time offset, and the ninth signal carries the first time value. In this way, the transfer mode of the first time value, ΔTA and Δt can be made more flexible.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the fifth signal or the seventh signal is a timing advance command (Timing Advance Command). In this way, the Timing Advance Command transmission parameters in the prior art can be reused without adding new signaling to achieve clock synchronization.

In combination with the first aspect and the above possible implementation, in another possible implementation, the terminal stores a timing advance TA, and the terminal calculates the clock deviation according to the second time value, the first time value, and the signal time offset, including: The terminal calculates the clock offset according to the second time value, the first time value, the signal time offset and TA. In this way, when the TA is maintained at the terminal side, the clock offset can also be calculated in combination with the timing advance TA.

With reference to the first aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries a request identifier, and the request identifier is used for the terminal to request the first time value and signal time offset from the access network device. In this way, the terminal can send the first signal carrying the request identifier to the access network device when clock synchronization is required.

In a second aspect, an embodiment of the present application provides a method for calculating a clock offset, the method including: an access network device receiving a first signal sent by a terminal. Then, the access network device sends the first time value and the signal time offset to the terminal. Wherein, the first time value indicates the time when the access network equipment receives the first signal, the signal time offset includes residual time offset Δt, the absolute value of Δt is smaller than the timing advance TA adjustment granularity, the first time value and signal time offset are used for terminal calculation clock skew.

In this way, after the access network device sends the first time value and the signal time offset to the terminal, the terminal can calculate the clock offset according to the signal time offset, whose absolute value is less than Δt of the TA adjustment granularity, so that the calculation of the clock offset will not Limited by the size of the TA adjustment granularity, the calculation accuracy of the clock deviation can be improved, and then when the first clock corresponding to the terminal is adjusted according to the clock deviation, so that the first clock is synchronized with the second clock corresponding to the access network device, The synchronization accuracy can be improved.

With reference to the second aspect, in a possible implementation manner, the signal time offset further includes a timing advance adjustment value ΔTA, where ΔTA is an integer multiple of the TA adjustment granularity. In this way, the clock skew can be calculated from ΔTA and Δt.

In combination with the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the access network device sending the first time value and signal time offset to the terminal includes: the access network device sending the second signal to the terminal, and the second The second signal carries the first time value and the signal time offset; or, the access network device sends the third signal and the fourth signal to the terminal, the third signal carries the first time value, and the fourth signal carries the signal time Partial. In this way, the transmission mode of the first time value and the signal time offset can be made more flexible.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the access network device sending the first time value and the signal time offset to the terminal includes: the access network device sending the fifth signal and the first signal time offset to the terminal. Six signals, the fifth signal carries ΔTA in the signal time offset, and the sixth signal carries the first time value and Δt in the signal time offset; or, the access network device sends the seventh signal and the eighth signal to the terminal and the ninth signal, the seventh signal carries ΔTA in the signal time offset, the eighth signal carries Δt in the signal time offset, and the ninth signal carries the first time value. In this way, the transfer mode of the first time value, ΔTA and Δt can be made more flexible.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the fifth signal or the seventh signal is a Timing Advance Command. In this way, the Timing AdvanceCommand passing parameters in the prior art can be reused to achieve clock synchronization.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal is a Preamble sequence. In this way, clock synchronization can be achieved through the random access procedure.

With reference to the second aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries a request identifier, and the request identifier is used for the terminal to request the first time value and signal time offset from the access network device. In this way, the access network device can perform a clock synchronization process when the terminal needs to perform clock synchronization.

In a third aspect, an embodiment of the present application provides a clock adjustment method, including: a terminal sending a first signal to an access network device. Then, the terminal receives the first time value and transmission delay sent by the access network device. Wherein, the first time value indicates the time when the access network equipment receives the first signal, and the transmission delay is calculated according to the signal time offset, and the signal time offset includes the residual time offset Δt, and the absolute value of Δt is smaller than the timing advance TA adjustment granularity. Afterwards, the terminal calculates the clock offset according to the first time value, the transmission delay and the second time value. Wherein, the second time value indicates the time when the terminal sends the first signal, and the clock offset is a time difference between the first clock configured in the terminal and the second clock configured in the access network device. Furthermore, the terminal adjusts the first clock according to the clock deviation.

In this way, the transmission delay received by the terminal from the access network device is calculated according to the Δt whose absolute value is smaller than the TA adjustment granularity. When the terminal calculates the clock deviation according to the transmission delay, the calculation of the clock deviation will not be limited by the TA Adjust the size of the granularity, so the calculation accuracy of the clock deviation can be improved, and then when the first clock corresponding to the terminal is adjusted according to the clock deviation, so that the first clock is synchronized with the second clock corresponding to the access network device, the synchronization accuracy can be improved .

With reference to the third aspect, in a possible implementation manner, the signal time offset further includes a timing advance adjustment value ΔTA, where ΔTA is an integer multiple of the TA adjustment granularity. In this way, the clock skew can be calculated from ΔTA and Δt.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal is a Preamble sequence, and the method further includes: the terminal sets an initial value of TA according to ΔTA. In this way, clock synchronization can be achieved through the random access procedure.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the timing advance TA is stored in the terminal, and the method further includes: the terminal adjusts the TA according to ΔTA. In this way, the TA can also be updated while implementing clock synchronization.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the method further includes: the terminal receives the Timing Advance Command sent by the access network device, and the Timing Advance Command carries ΔTA. In this way, the timing advance command transmission parameters in the prior art can be reused to achieve clock synchronization.

In combination with the third aspect and the above possible implementation manner, in another possible implementation manner, the terminal receiving the first time value and the transmission delay sent by the access network device includes: the terminal receiving the Timing AdvanceCommand sent by the access network device, Timing Advance Command carries the first time value, transmission delay and ΔTA. In this way, multiple parameters can be transmitted in the same signal, thereby reducing the number of interactive signaling lines.

In combination with the third aspect and the above possible implementation, in another possible implementation, the terminal stores a timing advance TA, and before the terminal receives the first time value and the transmission delay sent by the access network device, the method It also includes: the terminal sends the TA to the access network device, and the TA is used for the access network device to calculate the transmission delay. In this way, the clock skew can also be calculated in conjunction with the timing advance TA.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the timing advance TA is stored in the terminal, and the TA is carried in the first signal. In this way, by carrying the TA in the first signal, the number of signaling items for interaction can be reduced.

With reference to the third aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries a request identifier, and the request identifier is used for the terminal to request the first time value and transmission delay from the access network device. In this way, the terminal can send the first signal carrying the request identifier to the access network device when clock synchronization is required.

In a fourth aspect, an embodiment of the present application provides a method for calculating a clock offset, the method including: an access network device receiving a first signal sent by a terminal. Then, the access network device calculates the transmission delay according to the signal time offset, the signal time offset includes the residual time offset Δt, and the absolute value of Δt is smaller than the timing advance TA adjustment granularity. Afterwards, the access network device sends the transmission delay and the first time value to the terminal. Wherein, the first time value is used to indicate the time when the access network device receives the first signal, and the transmission delay and the first time value are used for the terminal to calculate the clock offset.

In this way, the access network device can calculate the transmission delay according to the Δt whose absolute value is smaller than the TA adjustment granularity, so that the calculation of the transmission delay is not limited by the size of the TA adjustment granularity, and the transmission delay is sent to the terminal to calculate the clock When there is a deviation, the calculation of the clock deviation will not be limited by the size of the TA adjustment granularity, so the calculation accuracy of the clock deviation can be improved, and then the first clock corresponding to the terminal is adjusted according to the clock deviation, so that the first clock is consistent with the access When the second clock corresponding to the network device is kept synchronous, the synchronization accuracy can be improved.

With reference to the fourth aspect, in a possible implementation manner, the signal time offset further includes a timing advance adjustment value ΔTA, where ΔTA is an integer multiple of the TA adjustment granularity. In this way, the clock skew can be calculated from ΔTA and Δt.

With reference to the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, the method further includes: the access network device sends a Timing Advance Command to the terminal, and the Timing Advance Command carries ΔTA. In this way, the timing advance command transmission parameters in the prior art can be reused to achieve clock synchronization.

In combination with the fourth aspect and the above possible implementation, in another possible implementation, the access network device sending the first time value and the transmission delay to the terminal includes: the access network device sends a Timing AdvanceCommand to the terminal, Timing Advance Command carries the first time value, transmission delay and ΔTA. In this way, multiple parameters can be transmitted in the same signal, thereby reducing the number of interactive signaling lines.

In combination with the fourth aspect and the above possible implementation manner, in another possible implementation manner, before the access network device calculates the transmission delay according to the signal time offset, the method further includes: the access network device receives the timing sent by the terminal TA in advance. The calculation of the transmission delay by the access network device according to the signal time offset includes: the calculation of the transmission delay by the access network device according to the signal time offset and TA. In this way, the clock skew can also be calculated in conjunction with the timing advance TA.

In combination with the fourth aspect and the above possible implementation, in another possible implementation, the first signal carries a timing advance TA, and the access network device calculates the transmission delay according to the time offset of the signal, including: the access network device calculates the transmission delay according to The signal time offset and TA calculate the transmission delay. In this way, by carrying the TA in the first signal, the number of signaling items for interaction can be reduced.

With reference to the fourth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal is a Preamble sequence. In this way, clock synchronization can be achieved through the random access procedure.

In a fifth aspect, the embodiment of the present application provides a clock adjustment method, the method includes: the terminal sends the first signal and the second time value to the access network device. Wherein, the second time value indicates the time when the terminal sends the first signal. Then, the terminal receives the clock offset sent by the access network device. Wherein, the clock offset is the time difference between the first clock configured in the terminal and the second clock configured in the access network device, and the clock offset is calculated according to the second time value, the first time value, and the signal time offset, and the second A time value indicates the time when the access network device receives the first signal, the signal time offset includes a residual time offset Δt, and the absolute value of Δt is smaller than the timing advance TA adjustment granularity. Furthermore, the terminal adjusts the first clock according to the clock deviation.

In this way, the terminal can receive the clock offset sent by the access network device. The clock offset is calculated according to the Δt whose absolute value is smaller than the TA adjustment granularity, so that the calculation of the clock offset will not be limited by the size of the TA adjustment granularity. Therefore, the calculation accuracy of the clock offset can be improved, and furthermore, when the terminal adjusts the first clock corresponding to the terminal according to the clock offset, so that the first clock is synchronized with the second clock corresponding to the access network device, the synchronization accuracy can be improved.

With reference to the fifth aspect, in a possible implementation manner, the signal time offset further includes a timing advance adjustment value ΔTA, where ΔTA is an integer multiple of the TA adjustment granularity. In this way, the clock skew can be calculated from ΔTA and Δt.

With reference to the fifth aspect and the foregoing possible implementation manner, in another possible implementation manner, the timing advance TA is stored in the terminal, and the method further includes: the terminal adjusting the TA according to ΔTA. In this way, the TA can also be updated while implementing clock synchronization.

With reference to the fifth aspect and the foregoing possible implementation manner, in another possible implementation manner, the method further includes: the terminal receives the Timing Advance Command sent by the access network device, and the Timing Advance Command carries ΔTA. In this way, the timing advance command transmission parameters in the prior art can be reused to achieve clock synchronization.

In combination with the fifth aspect and the above possible implementation manner, in another possible implementation manner, the terminal receiving the clock offset sent by the access network device includes: the terminal receiving the Timing Advance Command sent by the access network device, and the Timing Advance Command carries There is clock skew and ΔTA. In this way, multiple parameters can be transmitted in the same signal, thereby reducing the number of interactive signaling lines.

In combination with the fifth aspect and the above possible implementation, in another possible implementation, the terminal stores a timing advance TA, and before the terminal receives the clock offset sent by the access network device, the method further includes: the terminal sets the TA The TA is sent to the access network device, and the TA is used for the access network device to calculate the clock deviation. In this way, the clock skew can also be calculated in conjunction with the timing advance TA.

With reference to the fifth aspect and the foregoing possible implementation manner, in another possible implementation manner, the timing advance TA is stored in the terminal, and the TA is carried in the first signal. In this way, by carrying the TA in the first signal, the number of signaling items for interaction can be reduced.

With reference to the fifth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries the second time value. In this way, by carrying the second time value in the first signal, the number of signaling items for interaction can be reduced.

With reference to the fifth aspect and the above possible implementation manner, in another possible implementation manner, the terminal sending the second time value to the access network device includes: the terminal sending a second signal to the access network device, the second signal carrying Has a second moment value. In this way, the transmission of the second time value can be made more flexible.

With reference to the fifth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries a request identifier, and the request identifier is used for the terminal to request a clock offset from the access network device. In this way, the terminal can send the first signal carrying the request identifier to the access network device when clock synchronization is required.

In a sixth aspect, an embodiment of the present application provides a clock adjustment method, the method including: an access network device receiving a first signal and a second time value sent by a terminal. Wherein, the second time value indicates the time when the terminal sends the first signal. Then, the access network device calculates the clock offset according to the second time value, the signal time offset and the first time value. Wherein, the first time value indicates the time when the access network device receives the first signal, and the clock offset is the time difference between the first clock configured in the terminal and the second clock configured in the access network device, and the signal time offset includes The residual time offset Δt, the absolute value of Δt is smaller than the timing advance TA adjustment granularity, and the clock offset is used for the terminal to adjust the first clock. Then, the access network device sends the clock offset to the terminal.

In this way, the access network device can calculate the clock offset according to the Δt whose absolute value is smaller than the TA adjustment granularity, so that the calculation of the clock offset will not be limited by the size of the TA adjustment granularity, and thus the calculation accuracy of the clock offset can be improved. The clock offset is sent to the terminal, so that the terminal adjusts the first clock corresponding to the terminal according to the clock offset, so that when the first clock is synchronized with the second clock corresponding to the access network device, the synchronization accuracy can be improved.

With reference to the sixth aspect, in a possible implementation manner, the signal time offset further includes a timing advance TA adjustment value ΔTA, where ΔTA is an integer multiple of the TA adjustment granularity. In this way, the clock skew can be calculated from ΔTA and Δt.

With reference to the sixth aspect and the foregoing possible implementation manner, in another possible implementation manner, the method further includes: the access network device sends a Timing Advance Command to the terminal, and the Timing Advance Command carries ΔTA. In this way, the timing advance command transmission parameters in the prior art can be reused to achieve clock synchronization.

In combination with the sixth aspect and the above possible implementation, in another possible implementation, the access network device sending the clock offset to the terminal includes: the access network device sends a Timing Advance Command to the terminal, and the TimingAdvance Command carries the clock offset and ΔTA. In this way, multiple parameters can be transmitted in the same signal, thereby reducing the number of interactive signaling lines.

In combination with the sixth aspect and the foregoing possible implementation manner, in another possible implementation manner, before the access network device calculates the clock offset according to the first time value, the second time value, and the signal time offset, the method further includes: The access network device receives the timing sent by the terminal ahead of time by TA. The access network device calculating the clock offset according to the first time value, the second time value and the signal time offset includes: the access network device calculating the clock offset according to the first time value, the second time value, the signal time offset and TA. In this way, the clock skew can also be calculated in conjunction with the timing advance TA.

In combination with the sixth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries a timing advance TA, and the access network device, according to the first time value, the second time value, and the signal time offset, Calculating the clock offset includes: the access network device calculates the clock offset according to the first time value, the second time value, the signal time offset and TA. In this way, by carrying the TA in the first signal, the number of signaling items for interaction can be reduced.

With reference to the sixth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries the second time value. In this way, by carrying the second time value in the first signal, the number of signaling items for interaction can be reduced.

With reference to the sixth aspect and the above possible implementation manners, in another possible implementation manner, the access network device receiving the second time value sent by the terminal includes: the access network device receiving the second signal sent by the terminal, the second signal carries the second moment value in . In this way, the transmission of the second time value can be made more flexible.

In a seventh aspect, the embodiment of the present application provides a terminal, including: a sending unit, configured to send a first signal to an access network device; a receiving unit, configured to receive the first time value and signal time sent by the access network device Partial. Wherein, the first time value indicates the time when the access network device receives the first signal, and the signal time offset includes a residual time offset Δt, the absolute value of which is smaller than the timing advance TA adjustment granularity. The calculation unit is used to calculate the clock deviation according to the first time value, the signal time offset and the second time value. Wherein, the second time value indicates the time when the terminal sends the first signal, and the clock offset is a time difference between the first clock configured in the terminal and the second clock configured in the access network device. An adjustment unit, configured to adjust the first clock according to the clock deviation.

With reference to the seventh aspect, in a possible implementation manner, the signal time offset further includes a timing advance TA adjustment value ΔTA, where ΔTA is an integer multiple of the TA adjustment granularity.

With reference to the seventh aspect and the foregoing possible implementation manner, in another possible implementation manner, the terminal further includes: a storage unit configured to store the timing advance TA. The adjustment unit is also used to adjust TA according to ΔTA.

With reference to the seventh aspect and the above possible implementation manner, in another possible implementation manner, the receiving unit is specifically configured to: receive a second signal sent by the access network device, the second signal carries the first time value and signal time offset; or, receiving a third signal and a fourth signal sent by the access network device, the third signal carrying the first time value, and the fourth signal carrying the signal time offset.

With reference to the seventh aspect and the foregoing possible implementation manner, in another possible implementation manner, the receiving unit is specifically configured to: receive the fifth signal and the sixth signal sent by the access network device, where the fifth signal carries ΔTA in the signal time offset, the sixth signal carries the first time value and Δt in the signal time offset. Alternatively, receive the seventh signal, the eighth signal, and the ninth signal sent by the access network device, wherein the seventh signal carries ΔTA in the signal time offset, the eighth signal carries Δt in the signal time offset, and the seventh signal carries Δt in the signal time offset. The nine signals carry the first time value.

With reference to the seventh aspect and the foregoing possible implementation manner, in another possible implementation manner, the fifth signal or the seventh signal is a Timing Advance Command.

In combination with the seventh aspect and the above possible implementation, in another possible implementation, the terminal includes a storage unit, and the storage unit stores a timing advance TA, and the calculation unit is specifically configured to: according to the second time value, the first time Value, signal time skew and TA, calculate clock skew.

With reference to the seventh aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries a request identifier, and the request identifier is used for the terminal to request the first time value and signal time offset from the access network device.

In an eighth aspect, the embodiment of the present application provides an access network device, including: a receiving unit, configured to receive the first signal sent by the terminal; a sending unit, configured to send the first time value and signal time offset to the terminal, the second A time value indicates the time when the access network device receives the first signal. The signal time offset includes a residual time offset Δt. The absolute value of Δt is smaller than the timing advance TA adjustment granularity. The first time value and the signal time offset are used for the terminal to calculate the clock offset.

With reference to the eighth aspect, in a possible implementation manner, the signal time offset further includes a timing advance adjustment value ΔTA, where ΔTA is an integer multiple of the TA adjustment granularity.

In combination with the eighth aspect and the foregoing possible implementation manner, in another possible implementation manner, the sending unit is specifically configured to: send a second signal to the terminal, where the second signal carries the first time value and the signal time offset; or , sending a third signal and a fourth signal to the terminal, where the third signal carries the first time value, and the fourth signal carries a signal time offset.

In combination with the eighth aspect and the above possible implementation manner, in another possible implementation manner, the sending unit is specifically configured to: send the fifth signal and the sixth signal to the terminal, where the fifth signal carries ΔTA in the signal time offset , the sixth signal carries the first time value and Δt in the signal time offset; or, the seventh signal, the eighth signal and the ninth signal are sent to the terminal, the seventh signal carries ΔTA in the signal time offset, and the first The eighth signal carries Δt in the signal time offset, and the ninth signal carries the first time value.

With reference to the eighth aspect and the foregoing possible implementation manner, in another possible implementation manner, the fifth signal or the seventh signal is a Timing Advance Command.

With reference to the eighth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries a request identifier, and the request identifier is used for the terminal to request the first time value and signal time offset from the access network device.

In a ninth aspect, the embodiment of the present application provides a terminal, including: a sending unit, configured to send a first signal to an access network device. The receiving unit is configured to receive the first time value and the transmission delay sent by the access network device. Wherein, the first time value indicates the time when the access network equipment receives the first signal, and the transmission delay is calculated according to the signal time offset, and the signal time offset includes the residual time offset Δt, and the absolute value of Δt is smaller than the timing advance TA adjustment granularity. The calculation unit is used to calculate the clock deviation according to the first time value, the transmission delay and the second time value. Wherein, the second time value indicates the time when the terminal sends the first signal, and the clock offset is a time difference between the first clock configured in the terminal and the second clock configured in the access network device. An adjustment unit, configured to adjust the first clock according to the clock deviation.

With reference to the ninth aspect, in a possible implementation manner, the signal time offset further includes a timing advance adjustment value ΔTA, where ΔTA is an integer multiple of the TA adjustment granularity.

With reference to the ninth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal is a Preamble sequence, and the terminal further includes a setting unit, configured for the terminal to set an initial value of TA according to ΔTA.

With reference to the ninth aspect and the foregoing possible implementation manner, in another possible implementation manner, the terminal further includes a storage unit configured to store the timing advance TA stored in the terminal, and the adjustment unit is further configured to: adjust TA according to ΔTA.

With reference to the ninth aspect and the foregoing possible implementation manner, in another possible implementation manner, the receiving unit is further configured to receive a Timing Advance Command sent by the access network device, and the Timing Advance Command carries ΔTA.

In combination with the ninth aspect and the above possible implementation manner, in another possible implementation manner, the receiving unit is specifically configured to: receive the Timing Advance Command sent by the access network device, and the Timing Advance Command carries the first time value, transmission time delay and ΔTA.

With reference to the ninth aspect and the above possible implementation manner, in another possible implementation manner, the terminal includes a storage unit, the storage unit stores the timing advance TA, and the receiving unit receives the first time value sent by the access network device and Before the transmission delay, the sending unit is further configured to: send the TA to the access network device, and the TA is used for the access network device to calculate the transmission delay.

With reference to the ninth aspect and the foregoing possible implementation manner, in another possible implementation manner, the timing advance TA is stored in the terminal, and the TA is carried in the first signal.

With reference to the ninth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries a request identifier, and the request identifier is used for the terminal to request the first time value and transmission delay from the access network device.

In a tenth aspect, the embodiment of the present application provides an access network device, including: a receiving unit, configured to receive a first signal sent by a terminal. The calculation unit is configured to calculate the transmission delay according to the signal time offset, the signal time offset includes a residual time offset Δt, and the absolute value of Δt is smaller than the timing advance TA adjustment granularity. The sending unit is configured to send the transmission delay and the first time value to the terminal. Wherein, the first time value is used to indicate the time when the access network device receives the first signal, and the transmission delay and the first time value are used for the terminal to calculate the clock offset.

With reference to the tenth aspect, in a possible implementation manner, the signal time offset further includes a timing advance adjustment value ΔTA, where ΔTA is an integer multiple of the TA adjustment granularity.

With reference to the tenth aspect and the foregoing possible implementation manner, in another possible implementation manner, the sending unit is further configured to: send a Timing Advance Command to the terminal, where the Timing Advance Command carries ΔTA.

In combination with the tenth aspect and the above possible implementation, in another possible implementation, the sending unit is specifically configured to: send a Timing Advance Command to the terminal, where the Timing Advance Command carries the first moment value, transmission delay and ΔTA .

With reference to the tenth aspect and the above possible implementation manner, in another possible implementation manner, before the calculation unit calculates the transmission delay according to the signal time offset, the receiving unit is further configured to: advance the timing sent by the receiving terminal by TA. The calculation unit is specifically configured to: calculate the transmission delay according to the signal time offset and TA.

In combination with the tenth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries a timing advance TA, and the calculation unit is specifically configured to: calculate the transmission delay according to the signal time offset and TA.

With reference to the tenth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal is a Preamble sequence.

In an eleventh aspect, the embodiment of the present application provides a terminal, including: a sending unit, configured to send a first signal and a second time value to an access network device, where the second time value indicates the time when the terminal sends the first signal. The receiving unit is configured to receive the clock offset sent by the access network device. Wherein, the clock offset is the time difference between the first clock configured in the terminal and the second clock configured in the access network device, and the clock offset is calculated according to the second time value, the first time value, and the signal time offset, and the second A time value indicates the time when the access network device receives the first signal, the signal time offset includes a residual time offset Δt, and the absolute value of Δt is smaller than the timing advance TA adjustment granularity. An adjustment unit, configured to adjust the first clock according to the clock deviation.

With reference to the eleventh aspect, in a possible implementation manner, the signal time offset further includes a timing advance adjustment value ΔTA, where ΔTA is an integer multiple of the TA adjustment granularity.

With reference to the eleventh aspect and the foregoing possible implementation manner, in another possible implementation manner, the terminal further includes: a storage unit configured to store the timing advance TA; and an adjusting unit further configured to adjust TA according to ΔTA.

With reference to the eleventh aspect and the foregoing possible implementation manner, in another possible implementation manner, the receiving unit is further configured to: receive a Timing Advance Command sent by the access network device, where the Timing Advance Command carries ΔTA.

With reference to the eleventh aspect and the foregoing possible implementation manner, in another possible implementation manner, the receiving unit is specifically configured to: receive a Timing Advance Command sent by an access network device, where the Timing Advance Command carries a clock offset and ΔTA.

With reference to the eleventh aspect and the foregoing possible implementation manner, in another possible implementation manner, the terminal includes a storage unit, and the storage unit stores a timing advance TA, and before the receiving unit receives the clock offset sent by the access network device, The sending unit is also used for: sending the TA to the access network device, and the TA is used for the access network device to calculate the clock deviation.

With reference to the eleventh aspect and the foregoing possible implementation manner, in another possible implementation manner, the terminal includes a storage unit, where the timing advance TA is stored in the storage unit, and the TA is carried in the first signal.

With reference to the eleventh aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries the second time value.

With reference to the eleventh aspect and the foregoing possible implementation manner, in another possible implementation manner, the sending unit is specifically configured to: send a second signal to the access network device, where the second signal carries the second time value.

With reference to the eleventh aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries a request identifier, and the request identifier is used for the terminal to request a clock offset from the access network device.

In a twelfth aspect, the embodiment of the present application provides an access network device, including: a receiving unit, configured to receive a first signal sent by a terminal and a second time value, where the second time value indicates the time when the terminal sends the first signal . The calculation unit is used to calculate the clock deviation according to the second time value, the signal time offset and the first time value. Wherein, the first time value indicates the time when the access network device receives the first signal, and the clock offset is the time difference between the first clock configured in the terminal and the second clock configured in the access network device, and the signal time offset includes The residual time offset Δt, the absolute value of Δt is smaller than the timing advance TA adjustment granularity, and the clock offset is used for the terminal to adjust the first clock. The sending unit is configured to send the clock deviation to the terminal.

With reference to the twelfth aspect, in a possible implementation manner, the signal time offset further includes a timing advance TA adjustment value ΔTA, where ΔTA is an integer multiple of the TA adjustment granularity.

With reference to the twelfth aspect and the foregoing possible implementation manner, in another possible implementation manner, the sending unit is further configured to: send a Timing Advance Command to the terminal, and the Timing Advance Command carries ΔTA.

With reference to the twelfth aspect and the foregoing possible implementation manner, in another possible implementation manner, the sending unit is specifically configured to: send a Timing Advance Command to the terminal, where the Timing Advance Command carries a clock offset and ΔTA.

With reference to the twelfth aspect and the above possible implementation, in another possible implementation, before the calculation unit calculates the clock offset according to the first time value, the second time value, and the signal time offset, the receiving unit is further used to : The timing sent by the receiving terminal is advanced by TA. The calculation unit is specifically configured to: calculate the clock offset according to the first time value, the second time value, the signal time offset and TA.

In combination with the twelfth aspect and the above possible implementation, in another possible implementation, the first signal carries a timing advance TA, and the calculation unit is specifically configured to: according to the first time value, the second time value, the signal Time Offset and TA, to calculate clock skew.

With reference to the twelfth aspect and the foregoing possible implementation manner, in another possible implementation manner, the first signal carries the second time value.

With reference to the twelfth aspect and the foregoing possible implementation manner, in another possible implementation manner, the receiving unit is specifically configured to: receive a second signal sent by the terminal, where the second signal carries the second time value.

In a thirteenth aspect, the embodiment of the present application provides a terminal, including at least one processor, a memory, a bus, and a communication interface. The memory is used to store computer-executable instructions. At least one processor is connected to the memory through a bus. When the terminal is running, at least one processor executes the computer-executable instructions stored in the memory, so that the terminal performs the first aspect, the third aspect or the fifth aspect. The clock adjustment method of any of the aspects.

In a fourteenth aspect, the embodiment of the present application provides an access network device, including at least one processor, a memory, a bus, and a communication interface. The memory is used to store computer-executable instructions, at least one processor is connected to the memory through a bus, and when the access network device is running, at least one processor executes the computer-executable instructions stored in the memory, so that the access network device performs the above-mentioned second aspect, The clock adjustment method in any one of the fourth aspect or the sixth aspect.

In the fifteenth aspect, the embodiment of the present application provides a computer-readable storage medium, which is used to store computer software instructions used by the above-mentioned terminal. The clock adjustment method in any one of the aspect or the fifth aspect.

In the sixteenth aspect, the embodiment of the present application provides a computer-readable storage medium, which is used to store the computer software instructions used by the above-mentioned access network equipment, and when it is run on the computer, the computer can execute the above-mentioned second aspect 1. The clock adjustment or clock offset calculation method in any one of the fourth aspect or the sixth aspect.

In the seventeenth aspect, the embodiment of the present application provides a computer program product containing instructions, when it is run on a computer, the computer can execute the clock in any one of the first aspect, the third aspect, or the fifth aspect Adjustment method.

In the eighteenth aspect, the embodiment of the present application provides a computer program product containing instructions, which, when run on a computer, enables the computer to execute the clock in any one of the above-mentioned second aspect, fourth aspect, or sixth aspect. Adjustment method.

In a nineteenth aspect, an embodiment of the present application provides a system, including the terminal in any one of the seventh, ninth, or eleventh aspects above, and the eighth, tenth, or twelfth aspect above Access network equipment in any item.

Description of drawings

FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an access network device provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a mobile phone terminal provided by an embodiment of the present application;

FIG. 4 is a flowchart of a clock adjustment method provided in an embodiment of the present application;

FIG. 5 is a flowchart of another clock adjustment method provided in the embodiment of the present application;

FIG. 6 is a flow chart of another clock adjustment method provided in the embodiment of the present application;

FIG. 7 is a flow chart of another clock adjustment method provided in the embodiment of the present application;

FIG. 8 is a flowchart of another clock adjustment method provided in the embodiment of the present application;

FIG. 9 is a flow chart of another clock adjustment method provided in the embodiment of the present application;

FIG. 10a is a flow chart of another clock adjustment method provided in the embodiment of the present application;

FIG. 10b is a flow chart of another clock adjustment method provided in the embodiment of the present application;

Fig. 11a is a flow chart of another clock adjustment method provided by the embodiment of the present application;

Fig. 11b is a flow chart of another clock adjustment method provided by the embodiment of the present application;

FIG. 12 is a flow chart of another clock adjustment method provided in the embodiment of the present application;

FIG. 13 is a flow chart of another clock adjustment method provided in the embodiment of the present application;

FIG. 14a is a flow chart of another clock adjustment method provided in the embodiment of the present application;

FIG. 14b is a flow chart of another clock adjustment method provided in the embodiment of the present application;

FIG. 15 is a flowchart of another clock adjustment method provided in the embodiment of the present application;

FIG. 16 is a schematic structural diagram of a terminal provided in an embodiment of the present application;

FIG. 17 is a schematic structural diagram of another terminal provided by an embodiment of the present application;

FIG. 18 is a schematic structural diagram of an access network device provided in an embodiment of the present application;

FIG. 19 is a schematic structural diagram of another access network device provided by an embodiment of the present application;

FIG. 20 is a schematic structural diagram of a terminal or an access network device provided by an embodiment of the present application.

Detailed ways

For ease of understanding, some descriptions of concepts related to the embodiments of the present application are given by way of example for reference. As follows:

Transmission delay: The air interface delay between the terminal and the access network device is related to the propagation distance.

Timing advance TA: Due to the certain physical distance between the terminal and the access network equipment, when the terminal communicates with the access network equipment, it will cause a delay in signal transmission. If no measures are taken, the delay will cause the access network equipment to receive The message sent by the received terminal in this time slot overlaps with another message received by the access network device in the next time slot, so that the information cannot be decoded correctly. In order to eliminate the return propagation delay between the terminal and the access network equipment, reduce uplink interference, and ensure the orthogonality of uplink transmission, so that each terminal in the uplink does not interfere with each other, the terminal can transmit a certain time in advance. The advanced time is TA , and its unit can be μs.

TA adjustment granularity: TA is adjusted based on a certain quantitative unit, which refers to the smallest unit that TA can change. For example, in a long term evolution (long term evolution, LTE) system, the TA adjustment granularity is 16T _S , where T _S is the sampling period of the device.

Signal time offset: When a connection is established, the access network device can continuously measure the time offset between its own pulse time slot and the received terminal time slot according to the uplink signal sent by the terminal. This offset can be called Signal time skew. TA is related to the distance between the terminal and the access network equipment. The distance between the moving terminal and the access network equipment changes, which may also cause the terminal to switch between different cells. Therefore, the access network equipment needs to be constantly corrected according to the signal time deviation. Terminal TA. When the absolute value of the signal time offset measured by the access network device is smaller than the TA adjustment granularity, the signal time offset may include residual time offset Δt; when the absolute value measured by the access network device is greater than the TA adjustment granularity, the signal time offset may be Including TA adjustment value ΔTA and residual time offset Δt.

TA adjustment value ΔTA: the number of TA adjustment granularities included in the signal time offset, and ΔTA is an integer multiple of the TA adjustment granularity. During the TA update process, the value range of ΔTA is 0-63. The access network device can send ΔTA to the terminal to modify TA. If the corrected TA is TA _new and the pre-modified TA is TA _old , then the relationship between the two and the ΔTA value can be TA _new =TA _old +(ΔTA-31)×TA adjustment granularity.

Residual time offset Δt: the difference between the signal time offset and the TA adjustment value ΔTA.

In the description of the embodiments of this application, unless otherwise specified, "/" means or, for example, A/B can mean A or B; "and/or" in this article is only a description of the association of associated objects A relationship means that there may be three kinds of relationships, for example, A and/or B means: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "plurality" refers to two or more than two.

The technical solution provided by the embodiment of the present application can be applied to various mobile communication systems, such as the third generation mobile communication technology (3rd generation mobile communication, 3G) communication system, the fourth generation mobile communication technology (the4th generation mobile communication, 4G) communication system system, and a future evolution network, such as a fifth-generation mobile communication technology (5th-generation, 5G) communication system. For example, LTE systems, 3G related cellular systems, etc., and other such communication systems. In particular, it can be applied to a 5G ultra-dense network (ultra dense network, UDN) system. It should be noted that 5G standards can include machine-to-machine (M2M), D2M, macro-micro communication, enhanced mobile broadband (eMBB), ultra-high reliability and ultra-low latency communication ( scenarios such as ultrareliable & low latency communication (uRLLC) and massive machine type communication (mMTC), these scenarios may include but not limited to: communication scenarios between access network devices and access network devices, access network devices and terminals Communication scenarios between terminals, communication scenarios between terminals, etc. The technical solution provided by the embodiment of the present application can also be applied to the communication between the access network device and the terminal in the 5G communication system, or the communication between the access network device and the access network device, or the communication between the terminal and the terminal Waiting for the scene.

The technical solutions provided by the embodiments of the present application may be applied to the system architecture shown in FIG. 1 , and the system architecture may include an access network device 100 and one or more terminals 200 connected to the access network device 100 . Data transmission is performed between the terminal 200 and the access network device 100 according to the timing advance TA. The access network device 100 is configured with a local clock, and the terminal 200 is also configured with a local clock.

Wherein, the access network device 100 may be a relay station or an access point. The access network device 100 may be a base transceiver station (base transceiver station, BTS) in a global system for mobile communication (GSM) or code division multiple access (code division multiple access, CDMA) network, or a The NB (NodeB) in wideband code division multiple access (wideband code division multiple access, WCDMA) may also be the eNB or eNodeB (evolutional NodeB) in LTE. The access network device 100 may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario. The access network device 100 may also be a network device in a future 5G network or a network device in a future evolved public land mobile network (public land mobile network, PLMN), etc. The network equipment in the future 5G network may include a new radio base station (newradio NodeB), a next generation base station (next generation NodeB, gNB), or a transmission point (transmission point), etc.

The terminal 200 may be a user equipment (user equipment, UE), an access terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a UE terminal, a terminal, a wireless communication device, a UE proxy, or UE devices, etc. The access terminal can be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (PDA), a wireless communication function handheld devices, computing devices or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, etc.

In an example, the access network device 100 may be implemented through the structure shown in FIG. 2 . As shown in Figure 2, the access network equipment may include an indoor baseband processing unit (building baseband unit, BBU) and a remote radio frequency module (remote radio unit, RRU) connected to the antenna feeder system (that is, the antenna), and the BBU and the RRU may be connected according to Need to be disassembled for use. It should be noted that in a specific implementation process, the access network device may also adopt other general hardware architectures, rather than being limited to the general hardware architecture shown in FIG. 2 .

Taking the terminal 200 as a mobile phone as an example, the general hardware architecture of the mobile phone is described. As shown in FIG. 3 , the mobile phone may include: a radio frequency (radio frequency, RF) circuit 110, a memory 120, other input devices 130, a display screen 140, a sensor 150, an audio circuit 160, an I/O subsystem 170, a processor 180, And parts such as power supply 190. Those skilled in the art can understand that the structure of the mobile phone shown in Figure 3 does not constitute a limitation on the mobile phone, and may include more or less components than shown in the figure, or combine certain components, or split certain components, or Different component arrangements. Those skilled in the art can understand that the display screen 140 belongs to a user interface (user interface, UI), and the display screen 140 may include a display panel 141 and a touch panel 142 . And the handset may include more or fewer components than shown. Although not shown, the mobile phone may also include functional modules or devices such as a camera and a Bluetooth module, which will not be repeated here.

Further, the processor 180 is respectively connected to the RF circuit 110 , the memory 120 , the audio circuit 160 , the I/O subsystem 170 , and the power supply 190 . The I/O subsystem 170 is connected to other input devices 130 , the display screen 140 and the sensor 150 respectively. Among them, the RF circuit 110 can be used for sending and receiving information or receiving and sending signals during a call, in particular, after receiving downlink information from an access network device, it can be processed by the processor 180 . The memory 120 can be used to store software programs as well as modules. The processor 180 executes various functional applications and data processing of the mobile phone by running software programs and modules stored in the memory 120 . Other input devices 130 can be used to receive input numbers or character information, and generate key signal input related to user settings and function control of the mobile phone. The display screen 140 can be used to display information input by or provided to the user and various menus of the mobile phone, and can also accept user input. Sensor 150 may be a light sensor, motion sensor, or other sensor. Audio circuitry 160 may provide an audio interface between the user and the handset. The I/O subsystem 170 is used to control input and output external devices, and the external devices may include other device input controllers, sensor controllers, and display controllers. The processor 180 is the control center of the mobile phone. It uses various interfaces and lines to connect various parts of the entire mobile phone. By running or executing software programs and/or modules stored in the memory 120, and calling data stored in the memory 120, execution Various functions and processing data of the mobile phone, so as to monitor the mobile phone as a whole. The power supply 190 (such as a battery) is used to supply power to the above-mentioned components. Preferably, the power supply can be logically connected to the processor 180 through the power management system, so that functions such as charging, discharging, and power consumption can be managed through the power management system.

The synchronization solution in the prior art cannot solve the synchronization problem between the access network device 100 and the terminal 200 in the architecture shown in FIG. 1 . The synchronization scheme in the prior art can solve the synchronization problem between the access network device and other access network devices, but the transmission delay is replaced by TA, and the calculation accuracy of the clock deviation is limited to the TA adjustment granularity, so the synchronization accuracy is relatively low. Difference. For example, if a synchronization solution similar to that between the access network device and the access network device in the prior art is adopted to solve the synchronization problem between the access network device and the terminal, refer to FIG. 4 , assuming that the LTE system Among them, the transmission delay between the terminal UE and the access network device eNB is 35Ts, the downlink synchronization of the terminal UE is based on the arrival time of the downlink signal, and the transmission of the uplink signal is based on the downlink synchronization, then the signal actually reaches the access network device eNB There is a transmission delay of 70Ts. The access network device eNB measures the signal time offset according to the uplink signal, determines and sends the timing advance TA to the terminal UE. Since the TA adjustment granularity in the LTE system is 16Ts, the TA actually sent by the access network device eNB is an integer multiple of 16Ts, and the optimal TA value is 64Ts. After receiving the TA, the terminal UE sends the uplink signal 64Ts in advance, but there is still a residual time difference Δt=6Ts when the uplink signal actually reaches the access network device eNB. If a synchronization scheme similar to that in the prior art is adopted and the transmission delay is replaced by TA/2, the calculation accuracy of the transmission delay is limited by the size of the TA adjustment granularity, so that the calculation accuracy of the clock deviation is also limited by TA The size of the granularity is adjusted, so the synchronization error is relatively large.

The solution provided by the embodiment of this application can calculate the clock offset between the terminal and the access network device in the architecture shown in Figure 1 according to the residual time offset Δt whose absolute value is smaller than the TA adjustment granularity, thereby adjusting the clock on the terminal side, thus The synchronization problem between the terminal and the access network device can be solved, and the synchronization accuracy is high. The solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 5, an embodiment of the present application provides a clock adjustment method, which may include:

501. The terminal sends a first signal to an access network device.

Wherein, the first signal may be an existing uplink signal or a new uplink signal. In a possible implementation manner, the new uplink signal may have a shorter duration and a wider frequency range, which is beneficial to improving the accuracy of calculating the arrival time of the signal.

502. After receiving the first signal sent by the terminal, the access network device sends the first time value and signal time offset to the terminal. The first time value indicates the moment when the access network device receives the first signal, and the signal time offset includes residual The time offset Δt, the absolute value of Δt is smaller than the timing advance TA adjustment granularity, the first time value and the signal time offset are used for the terminal to calculate the clock offset.

For the description of the signal time offset, for details, refer to the related description at the beginning of the embodiment. The access network device may continuously measure signal time offset according to the uplink signal sent by the terminal, where the uplink signal may include but not limited to the first signal. The signal time offset may include a residual time offset Δt, and the absolute value of Δt is smaller than the TA adjustment granularity. Exemplarily, when the TA adjustment granularity is _16TS , the absolute value of Δt is less than _16TS .

After receiving the first signal sent by the terminal, the access network device can record the receiving time as the first time value, and send the first time value and the measured signal time offset to the terminal, so that the terminal can and signal skew to calculate clock skew.

503. After receiving the first time value and signal time offset sent by the access network device, the terminal calculates the clock deviation according to the first time value, signal time offset, and second time value, and the second time value instructs the terminal to send the first At the moment of the signal, the clock offset is the time difference between the first clock configured in the terminal and the second clock configured in the access network device.

The second time value here may be used to indicate the sending time recorded by the terminal when sending the first signal. The first clock is a local clock configured in the terminal. The second clock is a local clock configured in the access network device. After receiving the first time value and signal time offset sent by the access network device, the terminal can calculate the local clock configured in the terminal and the time value configured in the access network device according to the first time value, signal time offset and second time value. The time difference between the local clocks of , which can be called clock skew.

For the description about the signal time offset, reference may be made to the relevant description at the beginning of the embodiment. Since the signal time offset includes the residual time offset Δt, the absolute value of Δt is smaller than the TA adjustment granularity, the time unit of Δt can be ns or smaller time unit, and the clock offset is calculated according to the signal time offset, and the calculation of the clock offset does not It is not limited by the size of the TA adjustment granularity, so the calculation accuracy of the clock deviation is higher.

504. The terminal adjusts the first clock according to the clock deviation.

After calculating and obtaining the clock deviation, the terminal may adjust the first clock according to the clock deviation between the first clock corresponding to the terminal and the second clock corresponding to the access network device, so that the terminal and the access network device maintain synchronization. Specifically, when the clock deviation is a positive value, the terminal may advance the first clock by the amount of time corresponding to the clock deviation, so that the adjusted first clock is synchronized with the second clock; when the clock deviation is a negative value, the terminal may The first clock is delayed by an amount of time corresponding to the absolute value of the clock skew such that the adjusted first clock is synchronized with the second clock. For example, if the clock deviation calculated according to Δt is 20 ns, the terminal may advance the first clock by 20 ns; if the clock deviation calculated according to Δt is -20 ns, the terminal may delay the first clock by 20 ns.

Wherein, since the clock offset is calculated according to Δt whose absolute value is smaller than the TA adjustment granularity, the calculation accuracy is high, so that the synchronization accuracy achieved by adjusting the clock according to the clock offset is also high.

In the above-mentioned embodiments of the present application, the terminal can calculate the clock offset according to Δt whose absolute value is smaller than the TA adjustment granularity, so that the calculation of the clock offset will not be limited by the size of the TA adjustment granularity, thereby improving the calculation accuracy of the clock offset, and further When the first clock corresponding to the terminal is adjusted according to the clock deviation, so that the first clock is synchronized with the second clock corresponding to the access network device, the synchronization accuracy can be improved.

In the above step 501, the first signal may carry a first request identifier, and the first request identifier may be used by the terminal to request the first time value and signal time offset from the access network device. After receiving the first request identifier carried in the first signal, the access network device may send the first time value and the signal time offset to the terminal. In this way, the terminal can send the first signal carrying the request identifier to the access network device when clock synchronization is required. The embodiment of the present application does not specifically limit the form of the first identifier, for example, the first identifier may be a specific character string, a specific bit sequence, and the like.

In the above step 502, the access network device sending the first time value and signal time offset to the terminal may include:

5020. The access network device sends a second signal to the terminal, and the second signal carries the first time value and signal time offset; or, the access network device sends a third signal and a fourth signal to the terminal, and the third signal carries There is a first time value, and the fourth signal carries a signal time offset.

That is to say, the access network device can send the first time value and the signal time offset to the terminal through the same signal, thereby reducing the number of interactive signaling; or, the access network device can also send the first time value and the The signal time offset is sent to the terminal through different signals, so that the implementation manner is more flexible.

In this embodiment of the application, the solutions described in steps 501-504 and step 5020 above can be specifically applied in the following three scenarios.

Scenario 1: Random access process.

In this scenario, the terminal has not yet connected to the network, and there is no TA stored on the terminal side, and the signal time offset includes a residual time offset Δt and a TA adjustment value ΔTA. Referring to FIG. 6 , the first signal may be a Preamble sequence in a random access process.

The access network device may send the first time value and signal time offset to the terminal through the above step 5020 . That is, the access network device can send the first time value, Δt and ΔTA through the same signal to reduce the number of signaling; or, the access network device can send the first time value through one signal, and send Δt and ΔTA through another signal. ΔTA to make the implementation more flexible.

Alternatively, the access network device may also send the first time value and signal time offset to the terminal through the following step 5021:

5021. The access network device sends a fifth signal and a sixth signal to the terminal, where the fifth signal carries ΔTA in the signal time offset, and the sixth signal carries the first time value and Δt in the signal time offset; or, The access network device sends the seventh signal, the eighth signal and the ninth signal to the terminal, the seventh signal carries ΔTA in the signal time offset, the eighth signal carries Δt in the signal time offset, and the ninth signal carries Has the first moment value.

That is to say, in step 5021, the access network device may send ΔTA to the terminal through a signal, and send the first time value and Δt to the terminal through another signal. Alternatively, the access network device may also send the first time value, ΔTA, and Δt to the terminal through three signals, so that the implementation manner is more flexible.

It should be noted that the above "second signal" ... "ninth signal" is only used to distinguish different signals, and does not mean that there must be the same number of signals as the above.

Among them, since ΔTA is a parameter that the access network device also needs to transmit to the terminal in the existing random access process, and the first time value and Δt are parameters that need to be additionally transmitted in the embodiment of the present application, ΔTA can be used in the current The signal in the random access process is transmitted, and the first time value and Δt are transmitted through other signals, so that the signaling of the existing random access process can be more reused, and the impact on the existing random process can be minimized. Revise. In addition, the commands related to the random access procedure and the commands related to timing can also be decoupled. In addition, because the first time value is an absolute time, more characters and a large amount of data are required to transmit the first time value, and the existing uplink signal may be limited by the format or length and it is difficult to carry the first time value, so it can be The first time value is transmitted via a further signal.

In a possible implementation manner, referring to FIG. 6 , the access network device sends ΔTA to the terminal through the Timing Advance Command in the MAC RAR message in the existing random access process. For example, the above-mentioned fifth signal and seventh signal may be Timing Advance Command. Of course, the existing Timing Advance Command can also be modified so that the Timing Advance Command can further carry the first time value and Δt, so that the first time value and Δt are also sent to the terminal through the Timing Advance Command. Among them, TAC in the figure is used to represent Timing AdvanceCommand.

Further, referring to FIG. 6, after the terminal receives the ΔTA sent by the access network device, the method may further include:

505. The terminal sets an initial value of TA according to ΔTA.

Specifically, the terminal may set the initial value of the timing advance TA as ΔTA×TA adjustment granularity.

Since there is no TA maintained in the terminal before the random access process, after receiving the ΔTA sent by the access network device for the first time during the random access process, the terminal can start to maintain the TA, and set the initial value of TA to ΔTA× TA adjustment granularity. Different from the range of ΔTA in the TA update process, in the random access process, the range of ΔTA can be 0-1282, so the corresponding initial value of TA is 0-1282×TA adjustment granularity.

In this scenario, referring to step 503 in FIG. 6 , the terminal may calculate the clock offset according to the first time value, the second time value, and ΔTA and Δt in the signal time offset. If t0 represents the second time value, that is, the sending time of the first signal based on the first clock configured in the terminal, and t1 represents the first time value, that is, the first time point based on the second clock configured in the access network settings. The receiving moment of a signal, td represents the transmission delay between the terminal and the access network device, and t1-td represents the time delay estimated by the access network device based on the transmission delay, based on the second clock configured in the access network device The time at which the first signal is sent, t0-(t1-td), is the clock offset Toffset between the first clock and the second clock. For details, see Equation 1 below. And because in this scenario, the transmission delay can be expressed as the following formula 2, so the clock skew can be expressed as the following formula 3:

Toffset＝t0-(t1-td) Formula 1

td=(ΔTA*TA adjusted particle size+Δt)/2 Formula 2

Toffset＝t0-[t1-(ΔTA*TA adjusted particle size+Δt)/2] Formula 3

It should be noted that in this scenario, when the distance between the terminal and the access network device is relatively close, ΔTA in the signal time offset can also be 0; or, when the signal time offset is just an integer multiple of the TA adjustment granularity, the signal Δt in the time offset can also be 0.

In this scenario, the method provided by the embodiment of the present application can combine the random access process to realize clock synchronization and random access at the same time, so that the terminal accesses the network and can multiplex related messages in the random access process, and only needs Less modification, and the required number of signaling lines can be less.

Scenario 2: TA update process.

In this scenario, the terminal has connected to the network, and TA is stored on the terminal side. The first signal is a signal sent in advance according to TA. The absolute value of the signal time offset is greater than the TA adjustment granularity. The signal time offset includes residual time offset Δt and TA adjustment. Value ΔTA. Referring to FIG. 7, in the above step 503, the terminal calculates the clock deviation according to the first time value, the signal time offset and the second time value, including:

5030. The terminal calculates a clock offset according to the first time value, the signal time offset, the second time value, and TA. The signal time offset includes Δt and ΔTA.

In this scenario, the expression of the transmission delay td can refer to the following formula 4:

td=[TA+(ΔTA-31)*TA adjusted granularity+Δt]/2] Formula 4

Combining Equation 4 and the above Equation 1, in this scenario, the expression of the clock offset Toffset can refer to the following Equation 5:

Toffset＝t0-[t1-[TA+(ΔTA-31)*TA adjustment granularity+Δt]/2] Formula 5

In this scenario, the access network device may send the first time value and the signal time offset to the terminal through the above step 5020 or the above step 5021. Moreover, referring to step 502 in FIG. 7 , the access network device may also send ΔTA to the terminal through the Timing Advance Command in the TA update process, which will not be repeated here.

Further, referring to FIG. 7, in this scenario, after the terminal receives the ΔTA sent by the access network device, the method may further include:

506. The terminal adjusts TA according to ΔTA.

The terminal may update the previously stored TA through step 506 . Specifically, the terminal adjusting the TA according to ΔTA may include: the terminal adjusting the TA to TA+(ΔTA-31)×TA adjustment granularity. That is, the updated TA is the sum of the pre-updated TA and (ΔTA-31)×TA adjustment granularity.

Furthermore, TA and/or Δt may also be zero in this scenario.

It can be seen that in this scenario, the method provided by the embodiment of the present application can combine the TA update process to realize clock synchronization and TA update at the same time, and can reuse related messages in the existing TA update process, requiring only a few changes, and The required number of signaling lines may be less.

Scenario 3: The terminal has connected to the network, and TA is stored on the terminal side. The absolute value of the signal time offset is smaller than the TA adjustment granularity. The signal time offset only includes the residual time offset Δt, not ΔTA. TA does not need to be updated. The first signal is According to the signal sent by TA in advance.

Referring to FIG. 8, in the above step 503, the terminal calculates the clock deviation according to the first time value, the signal time offset and the second time value, which may include:

5031. The terminal calculates a clock offset according to the first time value, the signal time offset, the second time value, and TA. The signal time offset includes Δt.

In this scenario, the expression of transmission delay td can refer to the following formula 6:

td=(TA+Δt)/2 Formula 6

Combining Equation 6 and the above Equation 1, the expression of the clock offset Toffset can be referred to the following Equation 7:

Toffset＝t0-[t1-(TA+Δt)/2] Formula 7

In this scenario, the access network device may send the first time value and the signal time offset to the terminal through the above step 5020 or the above step 5021, which will not be repeated here.

In addition, in this scenario, TA can also be 0.

In this scenario, the process of realizing clock synchronization by calculating the clock skew can be regarded as a relatively independent process, decoupled from the TA, and only using the TA when calculating the clock skew. Moreover, the number of signaling pieces required by this process can be less, and does not depend on other processes (such as cell handover process) and mobility requirements.

Another embodiment of the present application provides a clock adjustment method. Referring to FIG. 9, the method may include:

901. The terminal sends a first signal to an access network device.

Wherein, for an explanation of the first signal, reference may be made to relevant descriptions in step 501 above.

902. After receiving the first signal sent by the terminal, the access network device calculates the transmission delay according to the signal time offset, the signal time offset includes the residual time offset Δt, and the absolute value of Δt is smaller than the timing advance TA adjustment granularity.

Wherein, since the transmission delay is calculated according to Δt whose absolute value is smaller than the TA adjustment granularity, the calculation of the transmission delay is not limited by the size of the TA adjustment granularity.

903. The access network device sends the transmission delay and the first time value to the terminal, where the first time value is used to indicate the time when the access network device receives the first signal.

904. After receiving the first time value and transmission delay sent by the access network device, the terminal calculates the clock deviation according to the first time value, transmission delay, and second time value, and the second time value instructs the terminal to send the first At the moment of the signal, the clock offset is the time difference between the first clock configured in the terminal and the second clock configured in the access network device.

Since the clock deviation is calculated according to the transmission delay, and the transmission delay is calculated according to Δt, the absolute value of Δt is smaller than the TA adjustment granularity, and the time unit of Δt can be ns or smaller, so the transmission delay and clock deviation The calculation of is not limited by the size of the TA adjustment granularity, so the calculation of the clock offset is not limited by the size of the TA adjustment granularity, and the calculation accuracy of the clock offset is higher.

905. The terminal adjusts the first clock according to the clock deviation.

In this step, since the clock offset is calculated based on Δt whose absolute value is smaller than the TA adjustment granularity, the calculation accuracy is high, so that the synchronization accuracy achieved by adjusting the clock according to the clock offset is also high.

In the above embodiments of the present application, the access network device can calculate the transmission delay according to Δt whose absolute value is smaller than the TA adjustment granularity, and send the transmission delay to the terminal to calculate the clock deviation, so that the transmission delay and the clock deviation The calculation is not limited by the size of the TA adjustment granularity, so the calculation accuracy of the clock deviation can be improved, and then the first clock corresponding to the terminal is adjusted according to the clock deviation, so that the first clock and the second clock corresponding to the access network device maintain When synchronizing, the synchronization accuracy can be improved.

In the above step 901, the first signal may carry a second request identifier, and the second request identifier may be used by the terminal to request the first time value and transmission delay from the access network device. After receiving the second request identifier carried in the first signal, the access network device may send the first time value and the transmission delay to the terminal. In this way, the terminal can send the first signal carrying the request identifier to the access network device when clock synchronization is required.

In the above step 903, the access network device can send the transmission delay and the first time value to the terminal through the same signal, so as to reduce the number of signaling entries; or, the access network device can also use two different signals, The first time value and the transmission delay are respectively sent to the terminal, so that the implementation manner is more flexible.

In this embodiment of the present application, the solutions described in steps 901-905 above may be specifically applied in the following three scenarios.

Scenario 1: Random access process.

In this scenario, there is no TA stored on the terminal side, and the signal time offset includes a residual time offset Δt and a TA adjustment value ΔTA. The first signal may be a Preamble sequence in a random access process. In the above step 902, the access network device calculates the transmission delay according to Δt and ΔTA in the signal time offset. The expression of the transmission delay can be referred to in the above formula 2; Delay, the expression for calculating the clock offset can refer to the above formula 1, and will not be repeated here.

In the above step 903, the access network device may send the first time value, transmission delay and ΔTA to the terminal through the same signal, so as to reduce the number of interactive signaling. Or, the access network device can send ΔTA to the terminal through one signal, and send the first time value and transmission delay to the terminal through another signal; or, the access network device can send the first time value and transmission delay to the terminal through three signals, respectively. A parameter among time value, transmission delay, and ΔTA is sent to the terminal separately, so that the implementation manner is more flexible.

In a possible implementation manner, referring to FIG. 10a, after the foregoing step 903, the method may further include:

906. The access network device sends a Timing Advance Command to the terminal, and the Timing Advance Command carries ΔTA.

Or, in a possible implementation manner, referring to FIG. 10b, the above step 903 may specifically include:

9030. The access network device sends a Timing Advance Command to the terminal, where the Timing Advance Command carries the first time value, transmission delay and ΔTA. In this way, the TimingAdvance Command in the random access process can be reused to transmit the first time value and the transmission delay required by the synchronization process at the same time.

Further, referring to FIG. 10a and FIG. 10b, after the terminal receives the ΔTA sent by the access network device, the method may further include the above step 505, so that the terminal can start maintaining the TA, and set the initial value of the TA according to the ΔTA.

It should be noted that, in this scenario, ΔTA or Δt in the signal time offset may be 0.

It can be seen that in this scenario, the method provided by the embodiment of the present application can combine the random access process to realize clock synchronization and random access at the same time, so that the terminal accesses the network and can multiplex related messages in the random access process, while Only less modification is required, and the number of required signaling lines can be less.

Scenario 2: TA update process.

In this scenario, the terminal has connected to the network, and TA is stored on the terminal side. The first signal is a signal sent in advance according to TA. The absolute value of the signal time offset is greater than the TA adjustment granularity. The signal time offset includes residual time offset Δt and TA adjustment. Value ΔTA.

In a possible implementation, before the above step 902, the method may further include:

907. The terminal sends a timing advance TA to the access network device.

Based on step 907, step 902 may include:

9020. The access network device calculates the transmission delay according to the signal time offset and the TA.

Or, in another possible implementation manner, the above-mentioned first signal carries a timing advance TA, and step 902 may specifically be the above-mentioned step 9020 .

In this scenario, the access network device can calculate the transmission delay according to TA and Δt and ΔTA in the signal time offset in the above step 902, the expression of the transmission delay can be referred to the above formula 4; and in the above step 904, The expression for calculating the clock offset by the access network device according to the transmission delay can refer to the above formula 1, which will not be repeated here.

In this scenario, regarding the transmission delay and the transmission manner of ΔTA, for details, refer to steps 903 and 906 in FIG. 10a and step 903 in FIG. 10b , which will not be repeated here.

Further, referring to FIG. 11a and FIG. 11b , in this scenario, after the terminal receives the ΔTA sent by the access network device, the method may further include the above step 506, so that the terminal can update the previously stored TA.

In addition, TA and/or Δt can also be 0 in this scenario.

It can be seen that in this scenario, the method provided by the embodiment of the present application can combine the TA update process to realize clock synchronization and TA update at the same time, and can reuse relevant messages in the existing TA update process, and only requires few changes. And the required number of signaling lines may be less.

Scenario 3: The terminal has connected to the network, and TA is stored on the terminal side. The absolute value of the signal time offset is smaller than the TA adjustment granularity. The signal time offset only includes the residual time offset Δt, not ΔTA. TA does not need to be updated. The first signal is According to the signal sent by TA in advance.

In a possible implementation manner, before the above step 902, the method may further include the above step 907, and based on the step 907, the step 902 may include the above step 9020. Or, in another possible implementation manner, the foregoing first signal carries a timing advance TA, and step 902 may specifically be the foregoing step 9020 .

In this scenario, referring to FIG. 12, the access network device can calculate the transmission delay according to the TA and Δt in the signal time offset in the above step 902, and the expression of the transmission delay can be referred to the above formula 6; and in the above step 904 In , the expression for calculating the clock offset by the access network device according to the transmission delay can refer to the above formula 1, which will not be repeated here.

In addition, in this scenario, TA can also be 0.

In this scenario, the process of realizing clock synchronization by calculating the clock skew can be taken as a relatively independent process, decoupled from the TA, and the TA is only used when calculating the clock skew. Moreover, the number of signaling pieces required by this process can be less, and does not depend on other processes (such as cell handover process) and mobility requirements.

Another embodiment of the present application provides a clock adjustment method. Referring to FIG. 13, the method may include:

1301. The terminal sends a first signal and a second time value to an access network device, where the second time value indicates the time when the terminal sends the first signal.

Wherein, for the description about the first signal, reference may be made to the relevant description in the above-mentioned step 501 .

1302. After receiving the first signal and the second time value sent by the terminal, the access network device calculates the clock deviation according to the second time value, the signal time offset, and the first time value, and the first time value indicates the access network device At the time when the first signal is received, the clock offset is the time difference between the first clock configured in the terminal and the second clock configured in the access network device. The signal time offset includes a residual time offset Δt, and the absolute value of Δt is less than the timing The TA adjustment granularity is advanced, and the clock deviation is used for the terminal to adjust the first clock.

Wherein, since the clock bias is calculated according to Δt, and the time unit of Δt may be ns or smaller, the calculation of the clock bias is not limited to the size of the TA adjustment granularity, and the calculation accuracy of the clock bias is higher.

1303. The access network device sends the clock offset to the terminal.

1304. After receiving the clock deviation sent by the access network device, the terminal adjusts the first clock according to the clock deviation.

Wherein, since the clock offset is calculated according to Δt whose absolute value is smaller than the TA adjustment granularity, the calculation accuracy is high, so that the synchronization accuracy achieved by adjusting the clock according to the clock offset is also high.

In the above-mentioned embodiments of the present application, the access network device can calculate the clock offset according to Δt whose absolute value is smaller than the TA adjustment granularity, so that the calculation of the clock offset will not be limited by the size of the TA adjustment granularity, thereby improving the calculation of the clock offset Accuracy, and then send the clock deviation to the terminal, so that the terminal adjusts the first clock corresponding to the terminal according to the clock deviation, so that when the first clock is synchronized with the second clock corresponding to the access network device, the synchronization accuracy can be improved.

In the above step 1301, the first signal may further carry a third request identifier, and the third request identifier may be used by the terminal to request a clock offset from the access network device. After receiving the third request identifier carried in the first signal, the access network device may send the clock offset to the terminal. In this way, the terminal can send the first signal carrying the request identifier to the access network device when clock synchronization is required.

In a possible implementation manner, the terminal sending the second time value to the access network device in the above step 1301 may include:

13010. The terminal sends a second signal to the access network device, where the second signal carries a second time value. In this way, the transmission mode of the second time value can be made more flexible.

In another possible implementation manner, the first signal may carry the second time value, and the terminal sends the second time value to the access network device through the first signal. In this way, by carrying the second time value in the first signal, the number of interactive signaling can be reduced.

In a possible implementation, before step 1302, the method may further include:

1305. The access network device receives the timing sent by the terminal and advances TA;

Based on step 1305, step 1302 may specifically include:

13020. The access network device calculates the clock offset according to the first time value, the second time value, the signal time offset and TA.

Or, in another possible implementation manner, the first signal may carry a timing advance TA, and the foregoing step 1302 may specifically be step 13020 .

In this embodiment of the present application, the solutions described in steps 1301-1305 and steps 13010 and 13020 above can be specifically applied in the following two scenarios.

Scenario 1: TA update process.

In this scenario, the terminal has connected to the network, and TA is stored on the terminal side. The first signal is a signal sent in advance according to TA. The absolute value of the signal time offset is greater than the TA adjustment granularity. The signal time offset includes residual time offset Δt and TA adjustment. Value ΔTA. Referring to FIG. 14, in the above step 1302, the access network device calculates the clock deviation according to the second time value, signal time offset and first time value, including:

13021. The access network device calculates a clock offset according to the second time value, Δt and ΔTA in the signal time offset, and the first time value and TA. The expression of the clock bias can refer to the above formula 5, which will not be repeated here.

In a possible implementation manner, referring to FIG. 14a, after the above step 1303, the method may further include:

1305. The access network device sends a Timing Advance Command to the terminal, and the Timing Advance Command carries ΔTA.

In another possible implementation manner, referring to FIG. 14b, the foregoing step 1303 may include: the access network device sends a Timing Advance Command to the terminal, and the Timing Advance Command carries a clock offset and ΔTA. In this way, by sending the clock offset and ΔTA simultaneously in the Timing Advance Command, signals in the prior art can be multiplexed and the number of interactive signaling can be reduced.

Further, referring to FIG. 14a and FIG. 14b, in this scenario, after the terminal receives the ΔTA sent by the access network device, the method may further include the above step 506, so that the terminal can update the previously stored TA.

In addition, TA and/or Δt can also be 0 in this scenario.

It can be seen that in this scenario, the method provided by the embodiment of the present application can combine the TA update process to realize clock synchronization and TA update at the same time, and can reuse relevant messages in the existing TA update process, and only requires few changes. And the required number of signaling lines may be less.

Scenario 2: The terminal has connected to the network, and TA is stored on the terminal side. The absolute value of the signal time offset is smaller than the TA adjustment granularity. The signal time offset includes the residual time offset Δt, but not ΔTA. TA does not need to be updated. The first signal is based on Signal sent by TA in advance.

Referring to FIG. 15, in the above step 1302, the access network device calculates the clock deviation according to the second time value, signal time offset and first time value, including:

13021. The access network device calculates a clock offset according to the second time value, the signal time offset, the first time value, and TA. Wherein, the signal time offset only includes Δt. The expression of the clock bias can refer to the above formula 7, which will not be repeated here.

In addition, in this scenario, TA can also be 0.

In this scenario, the process of realizing clock synchronization by calculating the clock skew can be taken as a relatively independent process, decoupled from the TA, and the TA is only used when calculating the clock skew. Moreover, the number of signaling pieces required for this process can be less, and does not depend on other processes (such as cell handover process) and mobility requirements.

The foregoing mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between various network elements. It can be understood that, in order to realize the above-mentioned functions, each network element, such as an access network device and a terminal, includes a corresponding hardware structure and/or software module for performing each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The embodiment of the present application can divide the functional units of the access network device and the terminal according to the above method example, for example, each functional unit can be divided corresponding to each function, or two or more functions can be integrated into one processing module . The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.

In the case of dividing each functional unit corresponding to each function, FIG. 16 shows a possible composition diagram of the terminal involved in the above and embodiments. As shown in FIG. 16, the terminal may include: a sending unit 1601, a receiving unit unit 1602 , calculation unit 1603 , adjustment unit 1604 and setting unit 1605 .

In a possible implementation manner, the sending unit 1601 is used to support the terminal to execute step 501 shown in FIG. 5-FIG. Unit 1603 is configured to support the terminal to execute step 503 shown in FIG. 5 and FIG. 6 , step 5030 in FIG. 7 and step 5031 shown in FIG. 8 . The adjustment unit 1604 is configured to support the terminal to execute step 504 shown in FIGS. 5-8 and step 506 shown in FIG. 7 . The setting unit 1605 is configured to support the terminal to execute step 505 shown in FIG. 6 .

In another possible implementation manner, the sending unit 1601 is configured to support the terminal to execute step 901 shown in FIG. 9-FIG. 12, and the receiving unit 1602 is configured to support the terminal to execute step 903 shown in FIG. In step 906 shown in FIG. 10a and FIG. 11a , the calculation unit 1603 is used to support the terminal to execute step 904 shown in FIG. 9-FIG. 12 . The adjustment unit 1604 is configured to support the terminal to execute step 905 shown in FIG. 9-FIG. 12, and step 506 shown in FIG. 11a and FIG. 11b. The setting unit 1605 is configured to support the terminal to execute step 505 shown in Fig. 10a and Fig. 10b.

FIG. 17 shows another possible composition diagram of the terminal involved in the foregoing and embodiments. As shown in FIG. 17 , the terminal may include: a sending unit 1701 , a receiving unit 1702 and an adjusting unit 1703 . Among them, the sending unit 1701 is used to support the terminal to execute the step 1301 shown in FIG. 13-FIG. 15, and the receiving unit 1702 is used to support the terminal to execute the step 1303 shown in FIG. , the adjusting unit 1703 is configured to support the terminal to execute step 1304 shown in FIG. 13-FIG. 15, and step 506 shown in FIG. 14a and FIG. 14b.

It should be noted that all relevant content of the steps involved in the above method embodiments can be referred to the functional description of the corresponding functional unit, and will not be repeated here. The terminal provided in the embodiment of the present application is used to execute the above clock adjustment method, so the same effect as the above clock adjustment method can be achieved.

In the case of dividing each functional unit corresponding to each function, FIG. 18 shows a schematic diagram of a possible composition of the access network device involved in the above and embodiments. As shown in FIG. 18 , the access network device may include : the receiving unit 1801 and the sending unit 1802. Wherein, the receiving unit 1801 is configured to support the access network device to execute step 501 shown in FIGS. 5-8 , and the sending unit 1802 is configured to support the access network device to execute step 502 shown in FIGS. 5-8 .

In the case of dividing each functional unit corresponding to each function, FIG. 19 shows another possible composition diagram of the access network device involved in the above and embodiments. As shown in FIG. 19 , the access network device can It includes: a receiving unit 1901 , a computing unit 1902 and a sending unit 1903 .

In a possible implementation manner, the receiving unit 1901 is configured to support the access network device to execute step 901 shown in FIG. 9-FIG. The sending unit 1903 is configured to support the access network device to execute step 903 shown in FIG. 9-FIG. 12, and step 906 shown in FIG. 10a and FIG. 11a.

In another possible implementation manner, the receiving unit 1901 is configured to support the access network device to execute step 1301 shown in FIG. 13-FIG. 15, and the computing unit 1902 is configured to support the access network device to execute In step 1302 shown, the sending unit 1903 is configured to support the access network device to execute step 1303 shown in FIG. 13-FIG. 15 and step 1305 shown in FIG. 14a.

It should be noted that all relevant content of the steps involved in the above method embodiments can be referred to the functional description of the corresponding functional unit, and will not be repeated here. The access network device provided in the embodiment of the present application is used to execute the above clock adjustment method, so the same effect as the above clock adjustment method can be achieved.

Further, the terminals or access network devices in Figures 16-19 are presented in the form of functional units. The "unit" here may refer to an application specific integrated circuit (ASIC), a circuit, a processor and memory for executing one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above functions device. In a simple embodiment, those skilled in the art can imagine that the terminals or access network devices in Fig. 16-Fig. 19 can be in the form of the apparatus shown in Fig. 20 . Each unit can be implemented by the processor and memory in the device shown in FIG. 20 .

As shown in FIG. 20 , the apparatus may include one or more ports 2004 coupled to the transceiver 2003 . The transceiver 2003 may be a transmitter, a receiver or a combination thereof, and sends or receives data packets from other network elements through the port 2004 . Processor 2001 is coupled to transceiver 2003 for processing data packets. Processor 2001 may include one or more multi-core processors and/or memory 2002 . The processor 2001 may be a general processor, an application specific integrated circuit, or a digital signal processing (digital signal processing, DSP).

The memory 2002 may be a non-transitory storage medium, coupled with the processor 2001, and used to store different types of data. The memory 2002 may include a read only memory (read only memory, ROM), a random access memory (random access memory, RAM) or other types of dynamic storage devices capable of storing information and instructions, and may also be a disk memory. Memory 2002 may be used to store instructions for implementing the link maintenance method.

The processor 2001 may execute one or more instructions according to the embodiment of the present invention to trigger link maintenance. These instructions can be stored in the memory 2002, and can also be integrated in the kernel of the operating system or a plug-in of the kernel.

When the processor 2001 executes the instruction, the instruction causes the terminal or the access network device to execute the above clock adjustment method, so the same effect as the above clock adjustment method or the clock offset calculation method can be achieved.

The embodiment of the present application also provides a computer storage medium, which may be the above-mentioned memory 2002 .

The embodiment of the present application also provides a computer program product including instructions, and when it is run on a computer, the computer can execute the clock adjustment method executed by the above-mentioned terminal.

The embodiment of the present application also provides a computer program product including instructions, which, when run on a computer, enable the computer to execute the clock adjustment or clock offset calculation method performed by the access network device.

The embodiment of the present application also provides a communication system, whose basic architecture can be referred to in FIG. 1 , and the system includes a terminal and an access network device that can implement the above clock adjustment or clock deviation calculation method.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated according to needs It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be Incorporation or may be integrated into another device, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may be one physical unit or multiple physical units, that is, it may be located in one place, or may be distributed to multiple different places . Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the software product is stored in a storage medium Among them, several instructions are included to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk.

The above is only a specific implementation of the application, but the protection scope of the application is not limited thereto, and any changes or replacements within the technical scope disclosed in the application should be covered within the protection scope of the application . Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (65)

1. a kind of clock adjusting method, which is characterized in that the described method includes:

Terminal sends the first signal to access network equipment；

The terminal receives inclined when the first moment value that the access network equipment is sent and signal, the first moment value instruction institute At the time of stating access network equipment and receive first signal, inclined Δ t when partially including residual when the signal, the Δ t's is absolute Value is less than timing advance TA and adjusts granularity；

The terminal according to when first moment value, the signal partially and the second moment value, calculate clock jitter, described second At the time of moment value indicates that the terminal sends first signal, when the clock jitter is first configured in the terminal The time difference between second clock configured in clock and the access network equipment；

The terminal adjusts first clock according to the clock jitter.

2. the method according to claim 1, wherein partially further including timing advance TA adjusted value Δ when the signal TA, the Δ TA are the integral multiple that the TA adjusts granularity.

3. according to the method described in claim 2, it is characterized in that, being stored with timing advance TA, the method in the terminal Further include:

The terminal adjusts the TA according to the Δ TA.

4. method according to claim 1-3, which is characterized in that the terminal receives the access network equipment hair Include: partially when the first moment value and signal sent

The terminal receives the second signal that the access network equipment is sent, and carries first moment in the second signal It is inclined when value and the signal；

Alternatively, the terminal receives the third signal and fourth signal that the access network equipment is sent, taken in the third signal With first moment value, carried in the fourth signal inclined when the signal.

5. according to the method in claim 2 or 3, which is characterized in that the terminal receives what the access network equipment was sent Include: partially when the first moment value and signal

The terminal receives the 5th signal and the 6th signal that the access network equipment is sent, and carries in the 5th signal When stating signal partially in the Δ TA, when carrying first moment value and the signal in the 6th signal partially in institute State Δ t；

Alternatively, the terminal receives the 7th signal, the 8th signal and the 9th signal that the access network equipment is sent, the described 7th When carrying the signal in signal partially in the Δ TA, when carrying the signal in the 8th signal partially in it is described Δ t carries first moment value in the 9th signal.

6. according to the method described in claim 5, it is characterized in that, the 5th signal or the 7th signal are timing advance Order Timing Advance Command.

7. the method according to claim 1, wherein be stored with timing advance TA in the terminal, the terminal Inclined when according to second moment value, first moment value and the signal, calculating clock jitter includes:

It is inclined to calculate clock by inclined and described TA when the terminal is according to second moment value, first moment value, the signal Difference.

8. it is identified the method according to claim 1, wherein carrying request in first signal, it is described to ask Ask mark inclined when requesting first moment value and the signal to the access network equipment for the terminal.

9. a kind of clock jitter calculation method, which is characterized in that the described method includes:

Access network equipment receives the first signal that terminal is sent；

The access network equipment is inclined when sending the first moment value and signal to the terminal, connects described in the first moment value instruction Inclined Δ t, the absolute value of the Δ t are small when partially including residual at the time of log equipment receives first signal, when the signal It is used for the terminal partially when timing advance TA adjustment granularity, first moment value and the signal and calculates clock jitter.

10. according to the method described in claim 9, it is characterized in that, when signal further includes timing advance adjusted value Δ partially TA, the Δ TA are the integral multiple that TA adjusts granularity.

11. according to the method described in claim 9, it is characterized in that, when the access network equipment sends first to the terminal Quarter value and when signal include: partially

The access network equipment sends second signal to the terminal, carry in the second signal first moment value and It is inclined when the signal；

Alternatively, the access network equipment sends third signal and fourth signal to the terminal, carried in the third signal First moment value carries in the fourth signal inclined when the signal.

12. according to the method described in claim 10, it is characterized in that, when the access network equipment sends first to the terminal Quarter value and when signal include: partially

The access network equipment sends the 5th signal and the 6th signal to the terminal, carries the letter in the 5th signal Number when partially in the Δ TA, when carrying first moment value and the signal in the 6th signal partially in the Δ t；

Alternatively, the access network equipment sends the 7th signal, the 8th signal and the 9th signal, the 7th signal to the terminal In when carrying the signal partially in the Δ TA, when carrying the signal in the 8th signal partially in the Δ t, First moment value is carried in 9th signal.

13. according to the method for claim 12, which is characterized in that the 5th signal or the 7th signal mention for timing Preceding order Timing Advance Command.

14. according to the described in any item methods of claim 9-13, which is characterized in that carry request mark in first signal Know, the request mark is inclined when requesting first moment value and the signal to the access network equipment for the terminal.

15. a kind of clock adjusting method, which is characterized in that the described method includes:

Terminal sends the first signal and the second moment value to access network equipment, and second moment value indicates that the terminal sends institute At the time of stating the first signal；

The terminal receives the clock jitter that the access network equipment is sent, and the clock jitter is the configured in the terminal The time difference between second clock configured in one clock and the access network equipment, the clock jitter is according to described second Acquisition is calculated when moment value, the first moment value and signal partially, first moment value indicates described in the access network equipment reception Inclined Δ t, the absolute value of the Δ t are less than timing advance TA adjustment when partially including residual at the time of the first signal, when the signal Granularity；

The terminal adjusts first clock according to the clock jitter.

16. according to the method for claim 15, which is characterized in that partially further include timing advance adjusted value Δ when the signal TA, the Δ TA are the integral multiple that the TA adjusts granularity.

17. according to the method for claim 16, which is characterized in that be stored with timing advance TA, the side in the terminal Method further include:

The terminal adjusts the TA according to the Δ TA.

18. method according to claim 16 or 17, which is characterized in that the method also includes:

The timing advance order Timing Advance Command that the terminal receives that the access network equipment sends, it is described fixed When advance command in carry the Δ TA.

19. method according to claim 16 or 17, which is characterized in that the terminal receives the access network equipment and sends Clock jitter include:

The timing advance order Timing Advance Command that the terminal receives that the access network equipment sends, it is described fixed When advance command in carry the clock jitter and the Δ TA.

20. according to the method for claim 15, which is characterized in that timing advance TA is stored in the terminal, described Before terminal receives the clock jitter that the access network equipment is sent, the method also includes:

The TA is sent to the access network equipment by the terminal, and the TA calculates the clock for the access network equipment Deviation.

21. according to the method for claim 15, which is characterized in that it is stored with timing advance TA in the terminal, described the The TA is carried in one signal.

22. according to the method for claim 15, which is characterized in that carry second moment in first signal Value.

23. according to the method for claim 15, which is characterized in that the terminal sends described the to the access network equipment Two moment values include:

The terminal sends second signal to the access network equipment, carries second moment value in the second signal.

24. according to the method for claim 15, which is characterized in that request mark is carried in first signal, it is described Request mark requests the clock jitter to the access network equipment for the terminal.

25. a kind of clock adjusting method, which is characterized in that the described method includes:

Access network equipment receives the first signal and the second moment value that terminal is sent, and second moment value indicates the terminal hair At the time of sending first signal；

The access network equipment is according to partially and the first moment value, calculating clock jitter when second moment value, signal, and described the At the time of one moment value indicates that the access network equipment receives first signal, the clock jitter is to configure in the terminal The first clock and the access network equipment in time difference between the second clock that configures, when signal includes residual partially When inclined Δ t, the absolute value of the Δ t is less than timing advance TA and adjusts granularity, and the clock jitter adjusts institute for the terminal State the first clock；

The clock jitter is sent to the terminal by the access network equipment.

26. according to the method for claim 25, which is characterized in that partially further include timing advance TA adjusted value when the signal Δ TA, the Δ TA are the integral multiple that the TA adjusts granularity.

27. according to the method for claim 26, which is characterized in that the method also includes:

The access network equipment is mentioned to the terminal transmission timing advance command Timing Advance Command, the timing The Δ TA is carried in preceding order.

28. according to the method for claim 26, which is characterized in that the access network equipment is inclined to the terminal tranmitting data register Difference includes:

The access network equipment is mentioned to the terminal transmission timing advance command Timing Advance Command, the timing The clock jitter and the Δ TA are carried in preceding order.

29. according to the described in any item methods of claim 25-28, which is characterized in that in the access network equipment according to It is inclined when the first moment value, second moment value and signal, before calculating clock jitter, the method also includes:

The access network equipment receives the timing advance TA that the terminal is sent；

It is inclined when the access network equipment is according to first moment value, second moment value and signal, calculate clock jitter packet It includes:

Inclined and described TA when the access network equipment is according to first moment value, second moment value, the signal is calculated The clock jitter.

30. according to the described in any item methods of claim 25-28, which is characterized in that carry timing in first signal TA in advance, it is inclined when the access network equipment is according to first moment value, second moment value and signal, calculate clock jitter Include:

Inclined and described TA when the access network equipment is according to first moment value, second moment value, the signal is calculated The clock jitter.

31. according to the method for claim 25, which is characterized in that carry second moment in first signal Value.

32. according to the method for claim 25, which is characterized in that the access network equipment receives the institute that the terminal is sent Stating the second moment value includes:

The access network equipment receives the second signal that the terminal is sent, and carries second moment in the second signal Value.

33. a kind of terminal for clock adjustment characterized by comprising

Transmission unit, for sending the first signal to access network equipment；

Receiving unit, inclined, first moment value when for receiving the first moment value and signal of the access network equipment transmission At the time of indicating that the access network equipment receives first signal, when signal inclined Δ t, the Δ t when partially including residual Absolute value be less than timing advance TA adjust granularity；

Computing unit, for calculating clock jitter, institute according to inclined and the second moment value when first moment value, the signal At the time of stating the second moment value and indicate that the terminal sends first signal, configured in the clock jitter terminal The time difference between second clock configured in first clock and the access network equipment；

Adjustment unit, for adjusting first clock according to the clock jitter.

34. terminal according to claim 33, which is characterized in that partially further include timing advance TA adjusted value when the signal Δ TA, the Δ TA are the integral multiple that the TA adjusts granularity.

35. terminal according to claim 34, which is characterized in that further include:

Storage unit, for storing timing advance TA；

The adjustment unit is also used to, and adjusts the TA according to the Δ TA.

36. according to the described in any item terminals of claim 33-35, which is characterized in that the receiving unit is specifically used for:

The second signal that the access network equipment is sent is received, first moment value and described is carried in the second signal It is inclined when signal；

Alternatively, receiving the third signal and fourth signal that the access network equipment is sent, carried in the third signal described First moment value carries in the fourth signal inclined when the signal.

37. the terminal according to claim 34 or 35, which is characterized in that the receiving unit is specifically used for:

The 5th signal and the 6th signal that the access network equipment is sent are received, when carrying the signal in the 5th signal The Δ TA in partially, when carrying first moment value and the signal in the 6th signal partially in the Δ t；

Alternatively, receiving the 7th signal, the 8th signal and the 9th signal that the access network equipment is sent, taken in the 7th signal When with the signal partially in the Δ TA, when carrying the signal in the 8th signal partially in the Δ t, it is described First moment value is carried in 9th signal.

38. the terminal according to claim 37, which is characterized in that the 5th signal or the 7th signal mention for timing Preceding order Timing Advance Command.

39. terminal according to claim 33, which is characterized in that the terminal includes storage unit, the storage unit In be stored with timing advance TA, the computing unit is specifically used for:

Inclined and described TA when according to second moment value, first moment value, the signal calculates clock jitter.

40. terminal according to claim 33, which is characterized in that request mark is carried in first signal, it is described Request mark is inclined when requesting first moment value and the signal to the access network equipment for the terminal.

41. a kind of access network equipment characterized by comprising

Receiving unit, for receiving the first signal of terminal transmission；

Transmission unit, it is inclined when for sending the first moment value and signal to the terminal, it is connect described in the first moment value instruction Inclined Δ t, the absolute value of the Δ t are small when partially including residual at the time of log equipment receives first signal, when the signal It is used for the terminal partially when timing advance TA adjustment granularity, first moment value and the signal and calculates clock jitter.

42. access network equipment according to claim 41, which is characterized in that partially further include timing advance tune when the signal Whole value Δ TA, the Δ TA are the integral multiple that TA adjusts granularity.

43. access network equipment according to claim 41, which is characterized in that the transmission unit is specifically used for:

Second signal is sent to the terminal, is carried in the second signal inclined when first moment value and the signal；

Alternatively, sending third signal and fourth signal to the terminal, first moment value is carried in the third signal, It is carried in the fourth signal inclined when the signal.

44. access network equipment according to claim 42, which is characterized in that the transmission unit is specifically used for:

Send the 5th signal and the 6th signal to the terminal, when carrying the signal in the 5th signal partially in it is described Δ TA, when carrying first moment value and the signal in the 6th signal partially in the Δ t；

Alternatively, sending the 7th signal, the 8th signal and the 9th signal to the terminal, the letter is carried in the 7th signal Number when partially in the Δ TA, when carrying the signal in the 8th signal partially in the Δ t, in the 9th signal Carry first moment value.

45. access network equipment according to claim 44, which is characterized in that the 5th signal or the 7th signal are Timing advance order Timing Advance Command.

46. according to the described in any item access network equipments of claim 41-45, which is characterized in that carried in first signal There is request to identify, the request mark requests first moment value and the letter to the access network equipment for the terminal Number when it is inclined.

47. a kind of terminal for clock adjustment characterized by comprising

Transmission unit, described in access network equipment the first signal of transmission and the second moment value, second moment value is indicated At the time of terminal sends first signal；

Receiving unit, the clock jitter sent for receiving the access network equipment, the clock jitter are to match in the terminal The time difference between second clock configured in the first clock and the access network equipment set, the clock jitter is according to institute Acquisition is calculated when stating the second moment value, the first moment value and signal partially, first moment value indicates that the access network equipment connects Inclined Δ t, the absolute value of the Δ t are less than timing advance when partially including residual at the time of receiving first signal, when the signal TA adjusts granularity；

Adjustment unit, for adjusting first clock according to the clock jitter.

48. terminal according to claim 47, which is characterized in that partially further include timing advance adjusted value Δ when the signal TA, the Δ TA are the integral multiple that the TA adjusts granularity.

49. terminal according to claim 48, which is characterized in that further include:

Storage unit, for storing timing advance TA；

The adjustment unit is also used to, and adjusts the TA according to the Δ TA.

50. the terminal according to claim 48 or 49, which is characterized in that the receiving unit is also used to:

Receive the timing advance order Timing Advance Command that the access network equipment is sent, the timing advance life The Δ TA is carried in order.

51. the terminal according to claim 48 or 49, which is characterized in that the receiving unit is specifically used for:

Receive the timing advance order Timing Advance Command that the access network equipment is sent, the timing advance life The clock jitter and the Δ TA are carried in order.

52. terminal according to claim 47, which is characterized in that the terminal includes storage unit, the storage unit In be stored with timing advance TA, before the clock jitter that the receiving unit receives that the access network equipment is sent, the hair Unit is sent to be also used to:

The TA is sent to the access network equipment, the TA calculates the clock jitter for the access network equipment.

53. terminal according to claim 47, which is characterized in that the terminal includes storage unit, the storage unit In be stored with timing advance TA, carry the TA in first signal.

54. terminal according to claim 47, which is characterized in that carry second moment in first signal Value.

55. terminal according to claim 47, which is characterized in that the transmission unit is specifically used for:

Second signal is sent to the access network equipment, carries second moment value in the second signal.

56. terminal according to claim 47, which is characterized in that request mark is carried in first signal, it is described Request mark requests the clock jitter to the access network equipment for the terminal.

57. a kind of access network equipment characterized by comprising

Receiving unit, for receiving the first signal and the second moment value of terminal transmission, second moment value indicates the end At the time of end sends first signal；

Computing unit, for according to partially and the first moment value, calculating clock jitter when second moment value, signal, described the At the time of one moment value indicates that the access network equipment receives first signal, the clock jitter is to configure in the terminal The first clock and the access network equipment in time difference between the second clock that configures, when signal includes residual partially When inclined Δ t, the absolute value of the Δ t is less than timing advance TA and adjusts granularity, and the clock jitter adjusts institute for the terminal State the first clock；

Transmission unit, for the clock jitter to be sent to the terminal.

58. access network equipment according to claim 57, which is characterized in that partially further include timing advance TA when the signal Adjusted value Δ TA, the Δ TA are the integral multiple that the TA adjusts granularity.

59. access network equipment according to claim 58, which is characterized in that the transmission unit is also used to:

To the terminal transmission timing advance command Timing Advance Command, carried in the timing advance order The Δ TA.

60. access network equipment according to claim 58, which is characterized in that the transmission unit is specifically used for:

To the terminal transmission timing advance command Timing Advance Command, carried in the timing advance order The clock jitter and the Δ TA.

61. according to the described in any item access network equipments of claim 57-60, which is characterized in that the computing unit according to Inclined when first moment value, second moment value and signal, before calculating clock jitter, the receiving unit is also used to:

Receive the timing advance TA that the terminal is sent；

The computing unit is specifically used for:

Inclined and described TA, calculates the clock jitter when according to first moment value, second moment value, the signal.

62. according to the described in any item access network equipments of claim 57-60, which is characterized in that carried in first signal There is timing advance TA, the computing unit is specifically used for:

Inclined and described TA, calculates the clock jitter when according to first moment value, second moment value, the signal.

63. access network equipment according to claim 57, which is characterized in that carry described second in first signal Moment value.

64. access network equipment according to claim 57, which is characterized in that the receiving unit is specifically used for:

The second signal that the terminal is sent is received, carries second moment value in the second signal.

65. a kind of clock system, which is characterized in that including such as described in any item terminals of claim 33-40 or 47-56 and such as The described in any item access network equipments of claim 41-46 or 57-64.