CN105493581B - The method and communication node of synchronous communication - Google Patents

Abstract

The embodiment of the present invention provides the method and communication node of a kind of synchronous communication.This method comprises: first node determines that the synchronization signal of first node changes, wherein synchronization signal before changing is the first synchronization signal, the synchronization signal after change is the second synchronization signal；First node sends the first synchronizing indication message to second node, wherein carries modification information in the first synchronizing indication message, modification information is for determining the second synchronization signal；First node sends the second synchronization signal to second node.Based on the above-mentioned technical proposal, synchronizing indication message is sent to other nodes by first node, the synchronization signal after the other nodes for synchronizing communication with first node are changed according to the synchronizing indication message sink, without interrupting synchronous communication.

Description

The method and communication node of synchronous communication

Technical field

The present embodiments relate to the communications fields, and more particularly, to the method and communication section of a kind of synchronous communication Point.

Background technique

Synchronous communication refers to that communicating pair first establishes synchronization, that is, sends and receivees the both sides of signal for signal sending time Point cognition be it is identical, then communicating pair can send and receive continuous synchronization bit stream and be communicated.

At present, it has been proposed that a kind of terminal direct connection (Device-to-Device, D2D) communication based on cellular network Technology, in the communication technology, the user equipment (User Equipment, UE) of cellular network has the money using cellular network The ability that source is directly communicated, this user equipment are also referred to as honeycomb D2D equipment.D2D equipment can carry out bee with base station Nest is directly communicated with another D2D equipment while communication.In the honeycomb D2D communication technology, when no cellular network covers When, need the synchronisation source that can periodically send synchronization signal, it may be assumed that when a D2D equipment cellular network covering except work, And when not finding to have other D2D equipment to send synchronization signal in oneself range of receiving, which will become synchronisation source, D2D equipment around it receives the synchronization signal, and the communication of voice-and-data is carried out with the D2D equipment.

But after synchronous Feed Discovery more accurately synchronisation source, the synchronisation source can change oneself synchronization time with it is more smart Quasi- synchronisation source is synchronous., will step-out at this point, using the synchronisation source as the D2D equipment referred to synchronization time, it may be assumed that lose with it is synchronous The synchronous communication in source, so as to cause communication disruption.

Summary of the invention

The embodiment of the invention provides a kind of method of synchronous communication and communication nodes, in the synchronization signal that synchronisation source is sent When changing, the node for synchronizing communication with synchronisation source is enabled to not interrupt synchronous communication.

In a first aspect, providing a kind of method of synchronous communication, comprising: first node determines the synchronization signal of first node It changes, wherein synchronization signal before changing is the first synchronization signal, the synchronization signal after change is the second synchronization signal；The One node sends the first synchronizing indication message to second node, wherein carries modification information in the first synchronizing indication message, changes Information is for determining the second synchronization signal；First node sends the second synchronization signal to second node.

With reference to first aspect, in the first possible implementation, modification information includes location information, and location information is used In the frequency location for the time location and/or the second synchronization signal for indicating the second synchronization signal.

With reference to first aspect, in the second possible implementation, modification information includes the synchronization of the second synchronization signal Grade.

With reference to first aspect or the above-mentioned possible implementation of any one, in the third possible implementation, One node sends the first synchronizing indication message to second node, comprising: first node is sending the first synchronous letter to second node Number when, to second node send first synchronizing indication message.

The third possible implementation of combination with reference to first aspect, in the fourth possible implementation, Before one node sends the first synchronizing indication message to second node, the method for first aspect further include: first node is according to the The sending cycle of one synchronization signal sends the second synchronizing indication message to second node, wherein the second synchronizing indication message is not taken Band modification information.

With reference to first aspect or the above-mentioned possible implementation of any one, in a fifth possible implementation, The method of one side further include: first node, which sends change instruction to second node according to the sending cycle of the first synchronization signal, to be believed Breath, wherein change instruction information is for determining whether the synchronization signal of first node is changed to the second synchronization signal.

In conjunction with the 5th kind of possible implementation, in a sixth possible implementation, first node is same according to first The sending cycle for walking signal sends change instruction information to second node, comprising: first node is sending first to second node When synchronization signal, change instruction information is sent to second node；Alternatively, first node is sending the first synchronous letter to second node On default running time-frequency resource after number, change instruction information is sent to second node.

In conjunction with the 5th kind of possible implementation, in the 7th kind of possible implementation, the method for first aspect is also wrapped Include: first node sends the second synchronizing indication message to second node, wherein first according to the sending cycle of the first synchronization signal Node synchronizes to the first synchronizing indication message of second node transmission or second and refers to when sending the first synchronization signal to second node Show message, and the first synchronizing indication message and/or the second synchronizing indication message include change instruction information；Wherein, second is synchronous Instruction message does not carry modification information.

In conjunction with the 5th kind of possible implementation, in the 8th kind of possible implementation, according to the first synchronization signal Sending cycle sends change instruction information to second node, comprising: first node is when synchronous change cycle reaches, to the second section Point sends change instruction information, wherein synchronous change cycle is the period for allowing the first synchronization signal to change.

In conjunction with any one of the 5th kind to the 7th kind of possible implementation, in the 9th kind of possible implementation, First synchronizing indication message further includes synchronous change cycle information, and synchronous change cycle information is used to indicate the synchronous letter of permission first Number period changed, wherein first node sends the second synchronization signal to second node, comprising: first node becomes synchronous When the period of more cycle information instruction reaches, the second synchronization signal is sent to second node according to modification information.

With reference to first aspect or the above-mentioned possible implementation of any one, in the tenth kind of possible implementation, One synchronous instruction message further include: forwarding instruction information, node type information, hop count information, in node identification id information extremely Few a kind of information, wherein forwarding instruction information is used to indicate whether first node is forward node, and node type information is for referring to Show the type of first node, hop count information is used to indicate the node which forwarding synchronization signal first node is, node ID letter Breath includes the ID of first node.

The 7th kind of possible implementation of combination with reference to first aspect is turning in the 8th kind of possible implementation Bristle with anger show information instruction first node be forward node when, node ID further includes the ID of the synchronization source node of first node.

With reference to first aspect or the above-mentioned possible implementation of any one, in the 9th kind of possible implementation, One node is base station or terminal direct connection D2D equipment, at least one second node is base station or D2D equipment.

Second aspect provides a kind of method of synchronous communication, comprising: second node receives first node and determining first The the first synchronizing indication message sent when the synchronization signal of node changes, wherein synchronization signal before changing is first synchronous Signal, the synchronization signal after change are the second synchronization signal, carry modification information in the first synchronizing indication message, modification information is used In determining the second synchronization signal；Second node receives the second synchronization signal that first node is sent according to modification information.

In conjunction with second aspect, in the first possible implementation, modification information includes location information, and location information is used In the frequency location for the time location and/or the second synchronization signal for indicating the second synchronization signal, wherein second node is according to change Information receives the second synchronization signal that first node is sent, comprising: second node receives first node according to location information and sends Change after synchronization signal.

In conjunction with second aspect, in the second possible implementation, modification information includes the synchronization of the second synchronization signal Grade, wherein second node receives the second synchronization signal that first node is sent according to modification information, comprising: second node root The second synchronization signal that first node is sent is received according to synchronization level.

In conjunction with the above-mentioned possible implementation of any one of second aspect or second aspect, in the third possible realization In mode, second node, which receives first node is sent when the synchronization signal for determining first node changes first and synchronizes, to be referred to Show message, comprising: second node receives the first synchronizing indication message when receiving the first synchronization signal.

In conjunction with the third possible implementation of second aspect, in the fourth possible implementation, in the second section Point receives the first synchronizing indication message when receiving the first synchronization signal before, the method for second aspect further include: second node is pressed According to the sending cycle of the first synchronization signal, the second synchronizing indication message that first node is sent is received, wherein the second synchronizing indication Message does not carry modification information.

In conjunction with the above-mentioned possible implementation of any one of second aspect or second aspect, in the 5th kind of possible realization In mode, the method for second aspect further include: second node receives first node according to the sending cycle of the first synchronization signal and sends out The change instruction information sent, wherein change instruction information is for determining it is synchronous whether the synchronization signal of first node is changed to second Signal.

In conjunction with the 5th kind of possible implementation of second aspect, in a sixth possible implementation, second node The change instruction information that first node is sent is received according to the sending cycle of the first synchronization signal, comprising: second node is receiving When the first synchronization signal that first node is sent, the change instruction information that first node is sent is received；Alternatively, second node is connecing On default running time-frequency resource after receiving the first synchronization signal, the change instruction information that first node is sent is received.

In conjunction with the 5th kind of possible implementation of second aspect, in the 7th kind of possible implementation, second aspect Method further include: second node according to the first synchronization signal sending cycle, receive first node send second synchronizing indication Message, wherein it is same to receive first node is sent first when receiving the first synchronization signal that second node is sent for second node Instruction message or the second synchronizing indication message are walked, and the first synchronizing indication message and/or the second synchronizing indication message include change Indicate information；Wherein, the second synchronizing indication message does not carry modification information.

In conjunction with the 5th kind of possible implementation of second aspect, in the 8th kind of possible implementation, second node The change instruction information that first node is sent is received according to the sending cycle of the first synchronization signal, comprising: second node is in synchronization When change cycle reaches, the change instruction information that reception first node is sent, wherein synchronous change cycle is to allow first to synchronize The period that signal changes.

In conjunction with any one of the 5th kind of second aspect to the 7th kind of possible implementation, in the 9th kind of possible reality In existing mode, the first synchronizing indication message further includes synchronous change cycle information, and synchronous change cycle information is used to indicate permission In the period that first synchronization signal changes, wherein second node receives the second synchronization signal that first node is sent, comprising: the Two nodes are same according to the second of modification information reception first node transmission when reaching in the period of synchronous change cycle information instruction Walk signal.

According to the above-mentioned possible implementation of any one of second aspect or second aspect, in the tenth kind of possible realization In mode, the first synchronizing indication message further include: forwarding instruction information, node type information, hop count information, node identification ID letter At least one of breath information, wherein forwarding instruction information is used to indicate whether first node is forward node, node type letter Breath is used to indicate the type of first node, and hop count information is used to indicate the node which forwarding synchronization signal first node is, Node ID information includes the ID of first node, wherein the method for second aspect further include: second node according to forwarding instruction information, At least one of node type information, hop count information, node identification id information information determines whether using first node as same Step source.

In conjunction with the tenth kind of possible implementation of second aspect, in a kind of the tenth possible implementation, forwarding When indicating that information instruction first node is forward node, node ID further includes the ID of the synchronization source node of first node.

It is possible at the 12nd kind in conjunction in the above-mentioned possible implementation of any one of second aspect or second aspect In implementation, first node is base station or terminal direct connection D2D equipment, at least one second node is base station or D2D equipment.

The third aspect provides a kind of communication node, comprising: determining module, for determining the synchronization signal of first node It changes, wherein synchronization signal before changing is the first synchronization signal, the synchronization signal after change is the second synchronization signal；The One sending module, for sending the first synchronizing indication message to second node, wherein carry change in the first synchronizing indication message Information, modification information is for determining the second synchronization signal；Second sending module, for sending the second synchronous letter to second node Number.

In conjunction with the third aspect, in the first possible implementation, modification information includes location information, and location information is used The time location of the second synchronization signal and/or the frequency location of the second synchronization signal are sent in instruction.

In conjunction with the third aspect, in the second possible implementation, modification information includes the synchronization of the second synchronization signal Grade.

In conjunction with the above-mentioned possible implementation of any one of the third aspect or the third aspect, in the third possible realization In mode, the first sending module is sent when the second sending module sends the first synchronization signal to second node to second node First synchronizing indication message.

In conjunction with the third possible implementation of the third aspect, in the fourth possible implementation, first is sent Module is also before sending the first synchronizing indication message to second node, according to the sending cycle of the first synchronization signal, to second Node sends the second synchronizing indication message, wherein the second synchronizing indication message does not carry modification information.

In conjunction with the above-mentioned possible implementation of any one of the third aspect or the third aspect, in the 5th kind of possible realization In mode, the first sending module sends change instruction information to second node according to the sending cycle of the first synchronization signal, wherein Change instruction information is for determining whether the synchronization signal of first node is changed to the second synchronization signal.

In conjunction with the 5th kind of possible implementation of the third aspect, in a sixth possible implementation, first is sent Module sends change instruction information to second node when the second sending module sends the first synchronization signal to first node；Or Person, the first sending module the second sending module to second node send the first synchronization signal after default running time-frequency resource on, to Second node sends change instruction information.

In conjunction with the 5th kind of possible implementation of the third aspect, in the 7th kind of possible implementation, first is sent Module sends the second synchronizing indication message to second node, wherein first sends mould according to the sending cycle of the first synchronization signal Block the second sending module to second node send the first synchronization signal when, to second node send first synchronizing indication message or Second synchronizing indication message, and the first synchronizing indication message and/or the second synchronizing indication message include change instruction information；Its In, the second synchronizing indication message does not carry modification information.

In conjunction with the 5th kind of possible implementation of the third aspect, in the 8th kind of possible implementation, first is sent Module sends change instruction information when synchronous change cycle reaches, to second node, wherein synchronous change cycle is to allow the The period that one synchronization signal changes.

In conjunction with any one of the 6th kind to the 8th kind of the third aspect, in the 9th kind of possible implementation, the One synchronous instruction message further includes synchronous change cycle information, and synchronous change cycle information, which is used to indicate, allows the first synchronization signal The period changed, wherein the second sending module is believed when reaching in the period of synchronous change cycle information instruction according to change It ceases to second node and sends the second synchronization signal.

In conjunction with the above-mentioned possible implementation of any one of the third aspect or the third aspect, in the tenth kind of possible realization In mode, the first synchronizing indication message further include: forwarding instruction information, node type information, hop count information, node identification ID letter At least one of breath information, wherein forwarding instruction information is used to indicate whether communication node is forward node, node type letter Breath is used to indicate the type of communication node, and hop count information is used to indicate the node which forwarding synchronization signal communication node is, Node ID information includes the ID of communication node.

In conjunction with the tenth kind of possible implementation of the third aspect, in a kind of the tenth possible implementation, forwarding When indicating that information instruction communication node is forward node, node ID further includes the ID of the synchronization source node of communication node.

In conjunction with the above-mentioned possible implementation of any one of the third aspect or the third aspect, in the 12nd kind of possible reality In existing mode, communication node is base station or terminal direct connection D2D equipment, at least one second node is base station or D2D equipment.

Fourth aspect provides a kind of communication node, comprising: the first receiving module, for receiving first node in determination The the first synchronizing indication message sent when the synchronization signal of first node changes, wherein synchronization signal before changing is first Synchronization signal, the synchronization signal after change are the second synchronization signal, and modification information, change letter are carried in the first synchronizing indication message Breath is for determining the second synchronization signal；Second receiving module, second for being sent according to modification information reception first node are same Walk signal.

In conjunction with fourth aspect, in the first possible implementation, modification information includes location information, and location information is used In indicate the second synchronization signal time location and/or the second synchronization signal frequency location, wherein the second receiving module according to Location information receives the second synchronization signal that first node is sent.

In conjunction with fourth aspect, in the second possible implementation, modification information includes the synchronization of the second synchronization signal Grade, wherein the second receiving module receives the second synchronization signal that first node is sent according to synchronization level.

In conjunction with the above-mentioned possible implementation of any one of fourth aspect or fourth aspect, the third can the side of being able to achieve In formula, the first receiving module receives the first synchronizing indication message when the second receiving module receives the first synchronization signal.

In conjunction with the third possible implementation of fourth aspect, in the fourth possible implementation, first is received Module receives the second synchronizing indication message that first node is sent, wherein second is same according to the sending cycle of the first synchronization signal Step instruction message does not carry modification information.

In conjunction with the above-mentioned possible implementation of any one of second aspect or second aspect, in the 5th kind of possible realization In mode, the first receiving module, which receives the change instruction that first node is sent also according to the sending cycle of the first synchronization signal, to be believed Breath, wherein change instruction information is for determining whether the synchronization signal of first node is changed to the second synchronization signal.

In conjunction with the 5th kind of possible implementation of fourth aspect, in a sixth possible implementation, first is received Module receives the change instruction that first node is sent when the second receiving module receives the first synchronization signal that first node is sent Information；Alternatively, the first receiving module receives the on the default running time-frequency resource after the second receiving module receives the first synchronization signal The change instruction information that one node is sent.

In conjunction with the 5th kind of possible implementation of fourth aspect, in the 7th kind of possible implementation, first is received Module receives first node and sends the second synchronizing indication message, wherein first receives according to the sending cycle of the first synchronization signal It is synchronous to receive first node is sent first when the second receiving module receives the first synchronization signal that second node is sent for module Instruction message or the second synchronizing indication message, and the first synchronizing indication message and/or the second synchronizing indication message include that change refers to Show information；Wherein, the second synchronizing indication message does not carry modification information.

In conjunction with the 5th kind of possible implementation of fourth aspect, in the 8th kind of possible implementation, first is received Module receives the change instruction information that first node is sent when synchronous change cycle reaches, wherein synchronous change cycle is fair Perhaps the period that the first synchronization signal changes.

In conjunction with any one of the 5th kind of fourth aspect to the 7th kind of possible implementation, in the 9th kind of possible reality In existing mode, the first synchronizing indication message further includes synchronous change cycle information, and synchronous change cycle information is used to indicate permission The period that first synchronization signal changes, wherein the second receiving module reaches in the period of synchronous change cycle information instruction When, the second synchronization signal that first node is sent is received according to modification information.

In conjunction with the above-mentioned possible implementation of any one of fourth aspect or fourth aspect, in the tenth kind of possible realization In mode, the first synchronizing indication message further include: forwarding instruction information, node type information, hop count information, node identification ID letter At least one of breath information, wherein forwarding instruction information is used to indicate whether first node is forward node, node type letter Breath is used to indicate the type of first node, and hop count information is used to indicate the node which forwarding synchronization signal first node is, Node ID information includes the ID of first node, wherein communication node further include: determining module, for according to forwarding instruction information, At least one of node type information, hop count information, node identification id information information determines whether using first node as same Step source.

In conjunction with the tenth kind of possible implementation of fourth aspect, in a kind of ten possible implementations, refer in forwarding When showing that information instruction first node is forward node, node ID further includes the ID of the synchronization source node of first node.

It is possible at the 12nd kind in conjunction in the above-mentioned possible implementation of any one of fourth aspect or fourth aspect In implementation, first node is base station or terminal direct connection D2D equipment, and communication node is base station or D2D equipment.

Based on the above-mentioned technical proposal, synchronizing indication message is sent to other nodes by first node, so that and first segment Other nodes that point carries out synchronous communication can be same without interrupting according to the synchronization signal after synchronizing indication message sink change Step communication.

Detailed description of the invention

In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention Attached drawing is briefly described, it should be apparent that, drawings described below is only some embodiments of the present invention, for For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other Attached drawing.

Fig. 1 shows the schematic flow chart of the method for the synchronous communication provided according to an embodiment of the present invention.

Fig. 2 shows the schematic flow charts of the method for the synchronous communication that another embodiment provides according to the present invention.

Fig. 3 shows the schematic flow chart of the method for the synchronous communication that another embodiment provides according to the present invention.

Fig. 4 shows the schematic diagram of the process of the transmission synchronization signal according to an embodiment of the present invention.

Fig. 5 shows the structural schematic diagram of the synchronizing indication message in another embodiment according to the present invention.

Fig. 6 shows the schematic flow chart of the method for the synchronous communication that another embodiment provides according to the present invention.

Fig. 7 shows the schematic diagram of the process of the transmission synchronization signal in another embodiment according to the present invention.

Fig. 8 shows the schematic diagram of the process of the transmission synchronization signal in another embodiment according to the present invention.

Fig. 9 shows the schematic diagram of the communication node provided according to an embodiment of the present invention.

Figure 10 shows the schematic diagram for the communication node that another embodiment provides according to the present invention.

Figure 11 shows the schematic diagram for the communication node that another embodiment provides according to the present invention.

Figure 12 shows the schematic diagram for the communication node that another embodiment provides according to the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work Example is applied, all should belong to the scope of protection of the invention.

It should be understood that technical solution of the present invention can be applied to various communication systems, and such as: global system for mobile telecommunications (English Full name: Global System of Mobile communication, english abbreviation: GSM) system, (English is complete for CDMA Claim: Code Division Multiple Access, english abbreviation: CDMA) system, wideband code division multiple access (full name in English: Wideband Code Division Multiple Access, english abbreviation: WCDMA) system, General Packet Radio Service (full name in English: General Packet Radio Service, english abbreviation: GPRS), LTE system, advanced long term evolution (full name in English: Advanced Long Term Evolution, english abbreviation: LTE-A) system, Universal Mobile Communication System (full name in English: Universal Mobile Telecommunication System, english abbreviation: UMTS) etc..The present invention Embodiment be illustrated by taking LTE system as an example.

It should be understood that in embodiments of the present invention, terminal includes but is not limited to user equipment (full name in English: User Equipment, english abbreviation: UE), mobile station (full name in English: Mobile Station, english abbreviation: MS), mobile terminal (full name in English: Mobile Terminal), mobile phone (full name in English: Mobile Telephone), mobile phone (full name in English: Handset) and portable equipment (full name in English: portable equipment) etc., which can be through wireless access network (English Literary full name: Radio Access Network, english abbreviation: RAN) it is communicated with one or more core nets, for example, terminal It can be mobile phone (or being " honeycomb " phone), computer with wireless communication function etc., which can also be just Take formula, pocket, hand-held, built-in computer or vehicle-mounted mobile device.The embodiment of the present invention is with the D2D communication technology In user equipment (i.e. D2D equipment) for be illustrated.

It should also be understood that base station can be the base station (full name in English: Base in GSM or CDMA in the embodiment of the present invention Transceiver Station, english abbreviation: BTS), it is also possible to the base station (Node B) in WCDMA, can also be in LTE Evolved base station (full name in English: evolved Node B, english abbreviation: eNB or e-NodeB), can also be that other are any Equipment with sending function, the embodiment of the present invention do not limit, for example, above-mentioned base station can also be in distributing antenna system (remote radio head Remote Radio Head, RRH), the micro-base station in relay station and heterogeneous network in junction network. The embodiment of the present invention is illustrated by taking eNB and micro-base station as an example.

Fig. 1 shows the schematic flow chart of the method 100 of synchronous communication according to an embodiment of the present invention, as shown in Figure 1, This method 100 includes following content.

110, first node determines that the synchronization signal of first node changes, wherein synchronization signal before changing is first Synchronization signal, the synchronization signal after change are the second synchronization signal.

120, first node sends the first synchronizing indication message to second node, wherein takes in the first synchronizing indication message Band modification information, modification information is for determining the second synchronization signal.

130, first node sends the second synchronization signal to second node.

For example, first node can be base station or micro-base station, it is also possible to UE, for example, D2D equipment.Second node can be with It is UE or micro-base station.

For example, under normal circumstances, first node periodically can send the first synchronization signal to other nodes, so as to it Its node is synchronized with first node according to first synchronization signal and is communicated.According to an embodiment of the invention, working as first node It was found that when needing to change or updating synchronization signal, for example, it was discovered that when needing to be changed to the second synchronization signal, it is same changing or updating Before walking signal, the synchronizing indication message for sending carrying modification information in advance to other nodes synchronous with first node is (following Referred to as first synchronizing indication message), so that the content for preparing change synchronization signal and change is notified other nodes.To synchronization The letter alternation of signs, which can be, changes synchronization level, is also possible to the position of transmission synchronization signal (for example, time or frequency Rate) change, or the change to the frequency location for sending synchronization signal, the embodiment of the present invention is not limited to this.Change sentence It talks about, first node can generate the first synchronizing indication according to the change of time location, frequency location and/or synchronization level and disappear Breath.Other nodes, can be according to the modification information in the first synchronizing indication message after receiving the first synchronizing indication message The second synchronization signal (synchronization signal after changing) that first node is sent is received, thus according to the second synchronization signal and first Node synchronizes communication.

Therefore, the method for the synchronous communication of the embodiment of the present invention is sent to other nodes by first node and is simultaneously indicated Message enables with other nodes that first node synchronizes according to the synchronous letter after synchronizing indication message sink change Number, the consumption of electric energy is reduced without re-searching for synchronization signal without interrupting synchronous communication.

It should be understood that according to embodiments of the present invention, first node can also first determine the synchronization signal after change, it may be assumed that second Synchronization signal, and obtain the configuration information of the second synchronization signal, determines modification information further according to configuration information, first node according to The configuration information sends the second synchronization signal to second node.

It should also be understood that according to embodiments of the present invention, second node is not specific communication node, can be a communication section Point, can also be multiple communication nodes, and the embodiment of the present invention is to this and without limitation.

Optionally, as one embodiment, modification information includes location information, and location information is used to indicate the second synchronous letter Number time location and/or the second synchronization signal frequency location.

For example, if first node as the first synchronisation source have found higher second synchronisation source of synchronization level (for example, The higher synchronisation source of precision), then first node determination needs the first synchronization signal being changed to the second synchronization signal.First node The second synchronisation source can also be followed to be adjusted synchronization time, in this way by the first synchronization signal for sending the first synchronisation source Time location (or time point) changes.It is synchronized in addition, the clock frequency of oneself can also be changed to second by first node The clock frequency in source.Since first node changes clock frequency, so that the time for the first synchronization signal that the first synchronisation source is sent It changes position.In other words, the clock frequency that first node can be sent according to higher second synchronisation source of synchronization level The clock frequency for changing oneself, since the clock frequency of first node changes, so that the first synchronization signal that first node is sent Time location changed.At this moment, first node, which can shift to an earlier date to other nodes, sends second synchronization signal of carrying First synchronizing indication message of time location, and sent on the time of modification information instruction and/or frequency to other nodes Second synchronization signal.After other nodes receive the first synchronizing indication message, it can be connect according to the temporal information of the second synchronization signal Receive the second synchronization signal.

In addition, the transmission frequency of oneself can also be changed to the transmission frequency of the second synchronisation source by first node, that is, send The frequency of first synchronization signal will change.Since change is sent frequency by first node, so that the first synchronisation source was sent The frequency location of first synchronization signal will change.In other words, the frequency that first node can be sent according to the second synchronisation source Rate changes the frequency of oneself, frequency change meeting of first node so that the first synchronization signal of first node transmission frequency location It changes.At this moment, first node can shift to an earlier date the of the frequency location that second synchronization signal of carrying is sent to other nodes One synchronous instruction message, and the second synchronization signal is sent to other nodes in the frequency of modification information instruction.Other nodes It, can be according to the second synchronization signal of frequency reception of the second synchronization signal after receiving the first synchronizing indication message.

It should be understood that according to an embodiment of the invention, first node is in the sending time and/or transmission for determining synchronization signal When frequency needs to change, first node can in the first synchronizing indication message by the time location of the second synchronization signal and/or The second other nodes of synchronous signal frequency position informing are then sent out according to the time location and/or frequency location to other nodes The second synchronization signal is sent, other nodes then receive the second synchronization signal according to the time location and/or frequency location.

Therefore, the method for the synchronous communication of the embodiment of the present invention, by determining that change sends synchronization signal in first node Position when, to second node send carry synchronization signal location information first synchronizing indication message so that and first segment Point carry out synchronous communication other nodes can according to the location information receive change after synchronization signal, do not interrupt synchronize it is logical Letter, without re-searching for synchronization signal, reduces the consumption of electric energy.

It should be understood that in embodiments of the present invention, the location information of synchronization signal can refer to the synchronization signal phase after change For the time location of synchronization signal before changing.Such as: the location information of synchronization signal can be the (change of next synchronization signal Synchronization signal afterwards) initial position it is long relative to the time of the initial position of this synchronization signal (synchronization signal before changing) Degree.The location information of synchronization signal can also be the initial position of next synchronization signal (synchronization signal after change) relative to answering The time span of the initial position of transmission synchronization signal next time (synchronization signal before changing), but the embodiment of the present invention is not It is only limitted to this.

Optionally, as another embodiment, modification information includes the synchronization level of the second synchronization signal, and first node can be with The second synchronization signal is sent to second node according to the synchronization level of the second synchronization signal.

For example, first node can be micro-base station, and synchronization signal is periodically sent as the first synchronisation source, micro- base Slave node of at least one UE to stand in coverage area as first node, when at least one UE receives the of micro-base station transmission When one synchronization signal, is synchronized and communicated with micro-base station with the synchronised clock frequency of micro-base station.What micro-base station was periodically sent First synchronization signal can be forwarded from the synchronization signal that the second high synchronisation source of other synchronization levels is periodically sent, such as: The first synchronization signal that micro-base station is periodically sent can be forwarded from the synchronization that the other macro base station of upper level is periodically sent Signal.Micro-base station is synchronized with macro base station with the synchronised clock frequency of macro base station and is communicated.

When the synchronization level of synchronization signal that micro-base station is forwarded from macro base station transmission changes, determination and at least one A UE sends the first synchronizing indication message, modification information instruction the second synchronization signal of change that the first synchronizing indication message includes Synchronization level.Micro-base station sends the second synchronization signal at least one UE according to the synchronization level that the modification information indicates.

Therefore, the method for the synchronous communication of the embodiment of the present invention, by determining the same of change synchronization signal in first node Walk grade when, to other nodes send carry synchronization signal synchronization level synchronizing indication message so that and first node into The synchronization level that other nodes of row synchronous communication can be indicated according to synchronization level receives the synchronization signal after change, without in Disconnected synchronous communication reduces the consumption of electric energy without re-searching for synchronization signal.

It should be understood that the modification information of the embodiment of the present invention is also not necessarily limited to location information and synchronization level information, for example, working as When the embodiment of the present invention is applied in code division multiple access system, modification information can also be the spreading code for sending synchronization signal Change.In addition, the embodiment of the present invention is not limited to above-mentioned location information, as long as being able to reflect the position for sending synchronization signal Change location information all within the protection scope of the embodiment of the present invention.

According to an embodiment of the invention, in 120, first node when sending the first synchronization signal to second node, to Second node sends the first synchronizing indication message.

For example, when first node will change the first synchronization signal, it can be immediately backward the second of the first synchronization signal Node sends the first synchronizing indication message.

Optionally, as another embodiment, before first node sends the first synchronizing indication message to second node, figure 1 method further include: first node sends the second synchronizing indication to second node and disappear according to the sending cycle of the first synchronization signal Breath, wherein the second synchronizing indication message does not carry modification information.

In other words, it is synchronous can to send second to second node according to the sending cycle of the first synchronization signal for first node Instruction message, and when the first synchronization signal is changed to the second synchronization signal by first node determination, it is sent to second node First is simultaneously indicated message, carries modification information in the first synchronizing indication message.

For example, first node can follow after the first synchronization signal according to the sending cycle of the first synchronization signal to its Its node sends the second synchronizing indication message.Under normal circumstances, modification information can not be carried in the second synchronizing indication message, and It is just to be carried in the first synchronizing indication message when the first synchronization signal is changed to the second synchronization signal when first node determines Modification information.In this way, second node can receive the first synchronizing indication message and/or the second synchronization directly after synchronization signal Instruction message is realized simply, and the influence to system is smaller it is therefore not necessary to which other special sending times and period is arranged.

According to an embodiment of the invention, in 120, first node is sent out when synchronous change cycle is reached to second node Synchronizing indication message is sent, wherein synchronous change cycle is the period of the first synchronization signal change.In other words, when first node is true When needing the first synchronization signal being changed to the second synchronization signal surely, also to judge whether synchronous change cycle has arrived at, such as The synchronous change cycle of fruit also has arrived at, then sends the synchronizing indication message for carrying change instruction, otherwise until synchronous change week When phase reaches, the synchronizing indication message for carrying change instruction can be just sent.

For example, can be set for the change of the first synchronization signal the period, and the period can be with the hair of the first synchronization signal Send the period identical, can also be different from the sending cycle of the first synchronization signal, for example, it may be the transmission week of the first synchronization signal The integral multiple of phase.In other words, it when first node determination needs to change the first synchronization signal, needs until the synchronous change cycle phase Man Shi can just issue the synchronizing indication message for carrying change instruction information and modification information.Such as: synchronous change cycle information is 000 instruction allows the period of first node the first synchronization signal of change to be 20 milliseconds, and synchronous change cycle information is 001 instruction The period for allowing first node the first synchronization signal of change is 40 milliseconds etc..Second node can be in synchronizing indication message When change instruction information instruction first node needs to change the first synchronization signal, connect according to the modification information in synchronizing indication message Receive the second synchronization signal.

Optionally, as another embodiment, the method for Fig. 1 further include: first node is according to the transmission of the first synchronization signal Period to second node send change instruction information, wherein change instruction information be used for determine first node synchronization signal whether It is changed to the second synchronization signal.

It should be understood that the second change instruction information, which can be carried, is sent to second node in the first synchronizing indication message, It can be individually sent to second node.

According to an embodiment of the invention, first node can be when sending the first synchronization signal to second node, to second Node sends change instruction information.

For example, when first node will change the first synchronization signal, it can be immediately backward the second of the first synchronization signal Node sends change instruction information.

Alternatively, as another embodiment, first node is according to the sending cycle of the first synchronization signal to second node Send change instruction information, comprising: first node to second node send the first synchronization signal after default running time-frequency resource on, Change instruction information is sent to second node.

For example, sending the time of change instruction information can have between the regular hour with the time for sending the first synchronization signal Every so that second node can be accurately detected change instruction information.

Optionally, as another embodiment, first node can be according to the sending cycle of the first synchronization signal, to the second section Point sends the second synchronizing indication message, and wherein first node is when sending the first synchronization signal to second node, to second node The first synchronizing indication message or the second synchronizing indication message are sent, and the first synchronizing indication message and/or the second synchronizing indication disappear Breath includes change instruction information；Wherein, the second synchronizing indication message does not carry modification information.

In other words, the first synchronizing indication message and the second synchronizing indication message can also include change instruction information, Middle change instruction information is for determining whether the first synchronization signal is changed to the second synchronization signal.

For example, can indicate whether for the first synchronization signal to be changed to second with a bit before modification information together Signal is walked, for example, the change instruction information that the first synchronizing indication message carries is 1, can be indicated in the first synchronizing indication message Comprising modification information, the change instruction information that the second synchronizing indication message carries is 0, can be indicated in the second synchronizing indication message Not comprising modification information, in this way, other nodes are when determining that the change instruction information received indicates the change of the first synchronization signal It just will continue to the modification information and other information after receiving, power consumption can be reduced in this way.

According to an embodiment of the invention, first node can send to second node and become when synchronous change cycle is reached Information is more indicated, wherein synchronous change cycle is the period for allowing the first synchronization signal to change.

Alternatively, as another embodiment, the first synchronizing indication message further includes synchronous change cycle information, synchronous to become More cycle information is used to indicate the period for allowing the first synchronization signal to change, and first node can be in synchronous change cycle letter When the period of breath instruction reaches, the second synchronization signal is sent to second node according to modification information.

Specifically, in embodiments of the present invention, first node can determine that needing to change the first synchronization signal is second After synchronization signal, the second synchronization signal is retransmited until synchronous change cycle is expired.Such as: synchronous change cycle information is 000 instruction allows the period of first node the first synchronization signal of change to be 20 milliseconds, and synchronous change cycle information is 001 instruction The period for allowing first node the first synchronization signal of change is 40 milliseconds etc..Second node can expire in synchronous change cycle When according to synchronizing indication message in modification information receive the second synchronization signal.In this case, it is indicated in modification information The difference at the time point for the second synchronization signal of time point and transmission that time location can be expired using this change cycle is come table Show, i.e., second node can obtain the time of the second synchronization signal of transmission according to the difference.

It should be understood that the synchronization change cycle information that the first synchronization signal includes in the synchronizing indication message sent afterwards before changing It may be the same or different, in other words, the synchronization change cycle of a node can according to need and change, and Other nodes are notified in the synchronizing indication message that period sends.

Optionally, as another embodiment, when it includes location information that message, which is simultaneously indicated, synchronizing indication message is also wrapped It includes: at least one of forwarding instruction information, node type information, synchronization level, hop count information, node identification id information letter Breath, wherein forwarding instruction information is used to indicate whether first node is forward node, and node type information is used to indicate first segment The type of point, hop count information are used to indicate the node which forwarding synchronization signal first node is, node ID information includes the The ID of one node.

Specifically, in embodiments of the present invention, forwarding instruction information can be indicated by a bit value, such as: 0 for referring to Show that first node is not forward node, it may be assumed that first node is synchronous source node, sends synchronization signal as the first synchronisation source；1 uses In instruction first node be forward node, it may be assumed that first node is forwarded from it as the first synchronization signal that the first synchronisation source is sent The synchronization signal that the higher synchronisation source of his synchronization level is sent.Further, it is also possible to be indicated by other agreement forms, this hair Bright embodiment is not limited to that.One node can indicate letter according to the forwarding in the synchronizing indication message that multiple nodes are sent Breath, it is determined whether using first node as synchronisation source.For example, the node can be according to forwarding instruction information selection and synchronisation source section Point synchronizes, rather than synchronous with forward node, can make each node as synchronous with synchronous source node as possible in this way, so that synchronous Precision is higher, to avoid frequent switching synchronisation source.

In embodiments of the present invention, when forwarding instruction information instruction first node is forward node, the synchronizing indication Message can also include hop count information, can be indicated by two bit values, such as: 10 can indicate that first node is the 2nd forwarding The node of synchronization signal, it may be assumed that first node is forward node, and first node is second node for forwarding synchronization signal.This Outside, it can also be indicated by other agreement forms, the embodiment of the present invention is not limited to that.Alternatively, implementing in the present invention In example, when forwarding instruction information instruction first node is not forward node, the synchronizing indication message further include: synchronize Grade can indicate by two bit values, such as: 10 can indicate that the synchronization level of the first synchronization signal that first node is sent is 2.Further, it is also possible to be indicated by other agreement forms, the embodiment of the present invention is not limited to that.One node can root The forwarding in synchronizing indication message sent according to multiple nodes indicates information, it is determined whether using some node as synchronisation source.One A node can be synchronous with the closer node in distance synchronous source according to hop count information selection, for example, the node can choose and send out The lesser node of the hop count for including in the hop count information sent is synchronous, so that synchronization accuracy is higher, to avoid frequent switching synchronous Source.

In embodiments of the present invention, node type information can be indicated by two bit values, such as: 00 is used to indicate first The type of node is UE；11 types for being used to indicate first node are network side equipment, such as: it can be base station eNB.In addition, It can also be indicated by other agreement forms, the embodiment of the present invention is not limited to that.One node can be according to multiple The node type information in synchronizing indication message that node is sent, it is determined whether using some node as synchronisation source.For example, one Node can choose synchronous with macro base station rather than synchronize with micro-base station, so that synchronization accuracy is higher, to avoid frequent switching same Step source.

Optionally, as another embodiment, when forwarding instruction information instruction first node is forward node, node ID is also wrapped Include the ID of the synchronization source node of first node.

For example, when forwarding instruction information is expressed as 0, when being used to indicate first node to synchronize source node, node ID information ID including first node.When forwarding instruction information be expressed as 1, be used to indicate first node be forward node when, node ID letter Breath includes the ID and the ID for the synchronous source node for sending synchronization signal of first node.Since there may be multiple transmission synchronization signals Synchronization source node, therefore can be judged by node ID information synchronization signal to be changed be it is multiple send synchronization signals it is same It walks what the synchronous source node of which of source node was sent, in order to which second node can be detected accurately, and synchronizes therewith Communication.For example, other nodes when selecting synchronisation source, can choose, Er Feixuan synchronous with the node using base station as synchronisation source Select it is synchronous with the node using micro-base station as synchronisation source so that synchronization accuracy is higher, to avoid frequent switching synchronisation source.

In addition, in the scheme of above-mentioned change synchronization level, the first synchronizing indication message also may include forwarding instruction information, At least one of node type information, synchronization level, hop count information, node identification id information information.The effect of these information It is identical as the effect in previous embodiment, that is, it is used to determine whether using first node as synchronisation source, so that synchronization accuracy is higher, To avoid frequent switching synchronisation source, details are not described herein.

It should also be understood that may include and the first similar structure of synchronizing indication message and interior with the second synchronizing indication message Hold, unlike, the second synchronizing indication message can not include modification information.In addition, the change that the second synchronizing indication message includes More instruction information is different from the change instruction information that the second synchronizing indication message includes.

Fig. 2 shows the schematic flow charts of the method 200 of synchronous communication according to another embodiment of the present invention.Such as Fig. 2 Shown, this method 200 includes following content.

210, second node receives first that first node is sent when the synchronization signal for determining first node changes Message is simultaneously indicated, wherein synchronization signal before changing is the first synchronization signal, the synchronization signal after change is the second synchronous letter Number, modification information is carried in the first synchronizing indication message, modification information is for determining the second synchronization signal.

220, second node receives the second synchronization signal that first node is sent according to modification information.

Therefore, the method for the synchronous communication of the embodiment of the present invention is sent to other nodes by first node and is simultaneously indicated Message enables and synchronizes other nodes of communication according to same after synchronizing indication message sink change with first node Signal is walked, reduces the consumption of electric energy without re-searching for synchronization signal without interrupting synchronous communication.

According to an embodiment of the invention, modification information includes location information, location information is used to indicate the second synchronization signal Time location and/or the second synchronization signal frequency location, wherein in 220, second node receives the according to location information The second synchronization signal that one node is sent.

According to an embodiment of the invention, modification information includes the synchronization level of the second synchronization signal, wherein in 220, the Two nodes receive the second synchronization signal that first node is sent according to synchronization level.

In 210, second node receives the first synchronizing indication message when receiving the first synchronization signal.

Optionally, as another embodiment, before 220, the method for Fig. 2 further include: second node is synchronous according to first The sending cycle of signal receives the second synchronizing indication message that first node is sent, wherein the second synchronizing indication message does not carry Modification information.

Optionally, as another embodiment, the method for Fig. 2 further include: second node is according to the transmission of the first synchronization signal Period receives the change instruction information that first node is sent, and wherein change instruction information is used to determine the synchronization signal of first node Whether second synchronization signal is changed to.

Specifically, second node receives what first node was sent when receiving the first synchronization signal that first node is sent Change instruction information；Or second node receives first node hair on receiving the default running time-frequency resource after the first synchronization signal The change instruction information sent.

Optionally, as another embodiment, the method for Fig. 2 further include: second node according to the first synchronization signal transmission Period receives first node and sends the second synchronizing indication message, and wherein second node is same in receive second node transmission first When walking signal, the first synchronizing indication message or the second synchronizing indication message that first node is sent, and the first synchronizing indication are received Message and/or the second synchronizing indication message include change instruction information；Wherein, the second synchronizing indication message does not carry change letter Breath.

According to an embodiment of the invention, second node receives the change that first node is sent when synchronous change cycle reaches Information is more indicated, wherein synchronous change cycle is the period for allowing the first synchronization signal to change.

According to an embodiment of the invention, the first synchronizing indication message further includes synchronous change cycle information, synchronous change week Phase information is used to indicate the period for allowing the first synchronization signal to change, wherein in 220, second node is changed synchronous When the period of cycle information instruction reaches, the second synchronization signal that first node is sent is received according to modification information.

Optionally, as another embodiment, the first synchronizing indication message further include: forwarding instruction information, node type letter At least one of breath, hop count information, node identification id information information, wherein forwarding instruction information is used to indicate first node It whether is forward node, node type information is used to indicate the type of first node, and hop count information is used to indicate first node and is The node of which forwarding synchronization signal, node ID information includes the ID of first node, wherein the method for Fig. 2 further include: second Node is determined according at least one of forwarding instruction information, node type information, hop count information, node identification id information information Whether using first node as synchronisation source.

Optionally, as another embodiment, when forwarding instruction information instruction first node is forward node, node ID is also The ID of synchronization source node including first node.

According to an embodiment of the invention, first node is base station or terminal direct connection D2D equipment, at least one second node are Base station or D2D equipment.

It is described in detail below with reference to technical solution of the Fig. 3 and Fig. 4 to one embodiment of the invention.Fig. 3 is shown The schematic flow chart of the method for the synchronous communication that another embodiment provides according to the present invention.Fig. 4 shows according to the present invention one The schematic diagram of the process of the transmission synchronization signal of a embodiment.The method of Fig. 3 is the example of the embodiment of Fig. 1 and Fig. 2.For side Just it describes, the technical solution of the embodiment of the present invention is illustrated so that first node is the first UE, second node is the 2nd UE as an example. In following example, the synchronizing indication message for carrying modification information is the first synchronizing indication message, does not carry modification information It is the second synchronizing indication message, commonly referred to herein as synchronizing indication message that message, which is simultaneously indicated,.

310, first synchronization signal of the base station to the first UE sending cycle.

For example, the first UE is under the covering of base station, the synchronous letter that the first UE can be sent according to the base station received It is number synchronous with base station holding.

The first synchronization signal and synchronizing indication message of 320, the first UE to the 2nd UE sending cycle.

For example, the first UE can the 2nd UE sending cycle into its coverage area synchronization signal, so as to the 2nd UE It can be synchronous with the first UE holding.In addition, the first UE can also be synchronized sending followed by sending to the 2nd UE for synchronization signal Instruction message, so that the 2nd UE knows synchronous change cycle according to the synchronization change cycle information carried in synchronizing indication message.

In addition, worked except cellular network coverage area as the first UE, and do not find there is it in oneself range of receiving His UE sends synchronization signal, then the first UE can be used as the first synchronisation source, periodically transmission synchronization signal, while sending synchronization Instruction message.

Such as Fig. 4, it may include synchronous change cycle information that message 420, which is simultaneously indicated, be used to indicate the first synchronization signal 410 Change cycle, that is, allow to change the period of the first synchronization signal, the starting point of the change cycle can be that send first for the first time same The position of signal 410 is walked, synchronizing indication message 420 can follow the first synchronization signal 410 to send.The change cycle can be with hair It send the period of the first synchronization signal identical, may also be distinct from that the period for sending the first synchronization signal, for example, change cycle can be with It is the integral multiple for sending the period of the first synchronization signal.As shown in figure 4, the first UE send the first synchronization signal 410 with synchronize refer to The period for showing message 420 can be t, and change cycle can be T.

330, the first UE detects whether to need to change the first synchronization signal, when not needing the first synchronization signal of change, holds Row step 340 executes step 350 when needing to change the first synchronization signal.

Specifically, when the first UE has found the synchronization signal that the higher synchronisation source of synchronization level is sent, for example, when first When UE has found precision that eNB or other UE are sent higher synchronization signal, the first UE needs that the synchronisation source is followed to be adjusted, For example, change synchronization time or synchronised clock frequency, in this way, the first UE needs to change the position for sending the first synchronization signal.

340, the first UE continues the first synchronization signal to the 2nd UE sending cycle.

For example, when the first UE determines that the first UE continues to the 2nd UE sending cycle when not needing the first synchronization signal of change First synchronization signal of property.

350, the first UE send the synchronizing indication message for carrying modification information to the 2nd UE.

When the first UE, which is determined, needs to change the position for sending synchronization signal, can disappear in adjacent next synchronizing indication Instruction, which synchronizes, in breath will do it change, and can be according to new synchronization signal format or position when change cycle next time is expired It sets to send synchronization signal.

Fig. 4 is participated in, above-mentioned synchronizing indication message 430 carries modification information, and modification information may include the position of synchronization signal Confidence breath, is used to indicate the position of the first UE the second synchronization signal 440 to be sent.First UE is synchronized to the 2nd UE transmission to be referred to Show message 430, in order to which the 2nd UE receives the second synchronization signal 440 according to the synchronizing indication message 430.Then, the first UE can To send the second synchronization signal 440 on the position that the modification information indicates.

360, the first UE send the second synchronization signal to the 2nd UE according to the modification information carried in synchronizing indication message.

For example, the first UE can send synchronization signal 440 on the position that the modification information indicates, the 2nd UE can be at this The second synchronization signal 440 is received on the position of modification information instruction.

In step 360, first node can also be taken when change cycle next time is expired according in synchronizing indication message The modification information of band sends the second synchronization signal to the 2nd UE.

It should be understood that the first UE can not also sending cycle synchronizing indication message, but it is synchronous sending first for the first time Signal followed by sends the synchronizing indication message for carrying synchronous change cycle, for notifying the synchronous change cycle of UE, thereafter no longer Synchronizing indication message is sent, when needing to change the first synchronization signal until determining just when synchronous change cycle is expired to the 2nd UE The synchronizing indication message for carrying modification information is sent, in this case, UE can be detected whether when synchronous change cycle is expired In the presence of synchronizing indication message.

According to an embodiment of the invention, first node can disappear sending the first synchronization signal and followed by sending to be simultaneously indicated Breath, the synchronization change cycle information which includes indicate the change cycle of the first synchronization signal, and first node exists Determine that sending when the change cycle is expired to second node includes the second synchronization signal when needing to change the first synchronization signal The synchronizing indication message of position enables second node to receive the second synchronization signal on the position, thus first node with Synchronous communication between second node will not be interrupted, so that second node reduces electric energy without re-searching for synchronization signal Consumption.

The structure of the synchronizing indication message of the embodiment of Fig. 3 is described in detail below with reference to Fig. 4.

Specifically, as shown in figure 4, in embodiments of the present invention, synchronizing indication message 430 that the first UE is sent with synchronize refer to Show that message 420 may include: change instruction information, forwarding instruction information, hop count information, node type information and synchronous change week Phase information, and the location information that message 430 further includes synchronization signal is simultaneously indicated.

Specifically, forwarding instruction information can be indicated with 1 bit, for example, forwarding instruction information is 1 instruction first UE is forward node (or intermediate node), i.e. the first synchronization signal 410 that the first UE is sent is forwarded from what synchronous source node was sent Synchronization signal；Hop count information can be indicated with two bits, for example, it is the 1st forwarding that hop count information, which is 01 the first UE of instruction, The node for the synchronization signal that motor synchronizing source node is sent；Node type information can be indicated with two bits, for example, node class Type information is that 00 instruction first node is UE.Synchronous change cycle information can be indicated with 3 bits, for example, synchronous change Cycle information is that 001 instruction change cycle is 40 milliseconds, i.e. the first UE of permission is used every sending on 40 milliseconds of time location In the synchronizing indication message of instruction the first synchronization signal of change.

In synchronizing indication message 420, change instruction information is 0, is used to indicate and does not need the first UE of change is sent the One synchronization signal；In synchronizing indication message 430, change instruction information is 1, is used to indicate and needs to change the of the first UE transmission One synchronization signal.

In synchronizing indication message 430, the location information of synchronization signal is used to indicate the when meta position of the second synchronization signal 440 It sets.In other words, the location information of synchronization signal just refers to the second synchronization signal 440 relative to the first synchronous letter before changing Numbers 412 time span.As shown in figure 4, the location information of synchronization signal can be the initial position phase of the second synchronization signal 440 For the time span t1 of the initial position of this synchronization signal (the first synchronization signal 412 before changing).The position of synchronization signal Confidence breath can also be that the initial position of the second synchronization signal 440 should be sent out relative to the next time of the first synchronization signal before changing The time span ︱ t1-t ︱ of position is sent, but the embodiment of the present invention is not limited to that.

Further, location information may include frequency domain information, that is, send the center frequency for the frequency domain resource that synchronization signal uses The number of point or resource block (RB), the information such as number of RB.

It should be understood that in embodiments of the present invention, it is synchronous source node that forwarding instruction information, which is the first UE of 0 instruction, at this point, together Walking instruction message 420 and synchronizing indication message 430 further includes synchronization level, is used to indicate synchronizing for the first synchronization signal 410 Grade.Such as: synchronization level can be with 2 bits, for example, the synchronization level that synchronization level is 10 the first synchronization signals of instruction 410 is 2, but the embodiment of the present invention is not limited to that.

It should also be understood that in embodiments of the present invention, synchronization change cycle information that synchronizing indication message 420 includes can be with The synchronization change cycle information that synchronizing indication message 430 includes is same or different.For example, in synchronizing indication message 430, together Walking change cycle information can be indicated with other bit values different from 001, such as: the period with 000 instruction change is 20 Millisecond, but the embodiment of the present invention is not limited to that.

It should be understood that in embodiments of the present invention, when the first UE sends the first synchronization signal 410 as synchronisation source with period t, Synchronizing indication message 420 can then be sent.2nd UE will disappear after receiving synchronizing indication message 420 from the synchronizing indication Synchronous change cycle information is obtained in breath 420, and learns that the first UE sends synchronizing indication according to the synchronization change cycle information The time location of message.

In an alternative embodiment of the invention, the synchronizing indication message that the first UE is sent can also include: node ID information.When When forwarding instruction information indicates that the first UE is synchronous source node, node ID information includes the id information of the first UE.When forwarding indicates When information indicates that the first UE is forward node, node ID information includes that the id information of the first UE is synchronous with transmission synchronization signal The id information of source node.

Fig. 5 shows the structural schematic diagram of the synchronizing indication message 500 in another embodiment according to the present invention.Shown in Fig. 5 Synchronizing indication message 500 include two homochronousness instruction messages: synchronizing indication message 520 and synchronizing indication message 530.Specifically Ground, as shown in figure 5, synchronizing indication message 530 and synchronizing indication message 520 that the first UE is sent include: change instruction letter Breath, forwarding instruction information, hop count information, node type information, synchronous change cycle information and node identification id information, Er Qietong Step instruction message 530 further includes the location information of synchronization signal.

It is simultaneously indicated in message 530 and synchronizing indication message 520 and Fig. 4 and message 430 and synchronizing indication message is simultaneously indicated 420 is similar, for sake of simplicity, details are not described herein.

It should be understood that in embodiments of the present invention, first node can also be base station, second node can be base station covering At least one UE in range.When base station sends synchronization signal, determines and at least one UE into oneself coverage area is sent Message is simultaneously indicated, enables and synchronizes at least one UE of communication in the position of synchronizing indication message instruction with the base station The second synchronization signal of upper reception, does not interrupt synchronous communication, without re-searching for synchronization signal, reduces the consumption of electric energy.

It is described in detail below with reference to technical solution of the Fig. 6 and Fig. 7 to another embodiment of the present invention.Fig. 6 is shown The schematic flow chart of the method for synchronous communication according to another embodiment of the present invention.Fig. 7 shows another reality according to the present invention Apply the schematic diagram of the process of the synchronization signal of example.The method of Fig. 6 is the example of the embodiment of Fig. 1 and Fig. 2.For the convenience of description, The technical solution of the embodiment of the present invention is illustrated so that first node is micro-base station, second node is UE as an example.In following example In son, the synchronizing indication message for carrying modification information is the first synchronizing indication message, and the synchronizing indication for not carrying modification information disappears Breath is the second synchronizing indication message, commonly referred to herein as synchronizing indication message.

610, first synchronization signal of the macro base station to micro-base station sending cycle.

For example, first synchronization signal of the macro base station to micro-base station sending cycle, so that micro-base station is according to the synchronization signal It synchronizes and communicates with macro base station.

620, first synchronization signal and synchronous indicating signal of the micro-base station to UE sending cycle.

For example, micro-base station can UE sending cycle into its coverage area the first synchronization signal, so as to these UE It can be synchronous with micro-base station holding.

As shown in fig. 7, micro-base station periodically sends the first synchronization signal 710 as the first synchronisation source, while sending same Walk instruction message 720.The synchronizing indication message 720 may include synchronous change cycle information, be used to indicate the first synchronization signal 710 change cycle allows to change the period of synchronization signal, it is synchronous that the starting point of the change cycle can be transmission first for the first time At the time of signal 710, synchronizing indication message 720 can follow the first synchronization signal 710 to send.The change cycle can be with hair It send the period of synchronization signal identical, may also be distinct from that the period for sending synchronization signal, for example, change cycle can be transmission together Walk the integral multiple in the period of signal.As shown in fig. 7, micro-base station sends the week of the first synchronization signal 710 and synchronizing indication message 720 Phase can be t, and change cycle can be T.

Specifically, synchronization signal can be made of synchronizing sequence.The synchronization signal of the embodiment of the present invention may include as follows Two kinds of situations.

A kind of situation is that the synchronization signal of different synchronization levels includes different synchronizing sequence.Assuming that synchronization signal has 4 Kind, it is respectively as follows: synchronization signal 0,1,2,3, and the corresponding different pulse train of synchronization signal 0,1,2,3, then there can be synchronous letter Number synchronization level and synchronization signal corresponding relationship it is as shown in table 1.

Table 1

Synchronization signal	0	1	2	3
					Synchronization level	0	1	2	3

The corresponding relationship of synchronization level and synchronization signal as shown in Table 1, different synchronization signals correspond to different synchronizations Grade.Such as: the corresponding synchronization level of synchronization signal 0 is 0.Similarly, the corresponding synchronization level difference of synchronization signal 1,2,3 It is 1,2,3.It should be understood that in embodiments of the present invention, synchronization signal can have N number of, and N is the integer more than or equal to 2, but this Inventive embodiments are not limited to that.

Another situation is that the synchronization signal of different synchronization levels is made of identical synchronizing sequence, but different grades of Synchronization signal includes the synchronizing sequence of the different numbers continuously transmitted.For example, four kinds of synchronization signals be respectively as follows: synchronization signal 0,1, 2,3, and the corresponding identical synchronizing sequence of synchronization signal 0,1,2,3, in addition, the company of the synchronization level of synchronization signal and synchronizing sequence The corresponding relationship of continuous transmission times is as shown in table 2.In other words, it can be distinguished not by sending the synchronizing sequence of different numbers Same synchronization signal.

Table 2

Synchronization level	0	1	2	3
					Continuously transmit number	4	3	2	4

Synchronization level as shown in Table 2 and the corresponding relationship for continuously transmitting number, different synchronization levels corresponds to different Continuously transmit number.For example, the synchronization signal that synchronization level is 0 will be realized by continuously repeating 4 subsynchronous sequences of transmission, then The corresponding 4 continuous synchronizing sequences of the synchronization signal that synchronization level is 0.Similarly, the synchronization signal of synchronization level 1,2,3 is wanted It continuously repeats respectively and sends 3 times, 2 times, 1 subsynchronous sequence, then the synchronization signal that synchronization level is 1,2,3 respectively corresponds 3,2 A, 1 synchronizing sequence.The number difference that the synchronization signal is sent due to continuously repeating is equivalent to synchronization signal corresponding different Several synchronizing sequences.

For example, synchronizing sequence will continuously repeat when the synchronization level for the second synchronization signal that micro-base station is sent to UE is 1 It sends 3 times, then the synchronizing sequence for continuously transmitting 3 times is the second synchronization signal.The synchronization level that UE is indicated according to the modification information 1 reception micro-base station continuously transmits 3 synchronizing sequences as synchronization signal.

630, micro-base station detects whether to need to change the synchronization level of the first synchronization signal.It is synchronized if necessary to change Grade, then execute 650, if you do not need to change synchronization level, then execute 640.

Specifically, whether the synchronizing channel that micro-base station can monitor macro base station changes, if change, micro-base station can lead to Know that the UE synchronization signal of its covering will change.For example, this is micro- after micro-base station listens to the synchronization level change of macro base station Base station needs to synchronize with macro base station, that is, keeps identical as the synchronization level of macro base station.For example, the synchronous letter that macro base station is sent Number synchronization level from 1 be changed to 2 when, micro-base station under its coverage area UE send synchronization signal also will be from synchronization level 2 are changed to synchronization level 3.

640, micro-base station continues the first synchronization signal to UE sending cycle.

650, micro-base station sends the synchronizing indication message for carrying the synchronization level of the second synchronization signal to UE.

When the synchronization level that micro-base station is forwarded from the synchronization signal of macro base station transmission changes, determines and sent to UE The synchronizing indication message 730 of modification information is carried, the modification information that synchronizing indication message 730 includes indicates the second synchronization signal Synchronization level.Micro-base station sends the second synchronization signal to UE according to the synchronization level that the modification information indicates.UE is according to the synchronization Grade receives the second synchronization signal.In this case, the position that micro-base station sends synchronization signal can be constant, i.e., UE still exists The second synchronization signal of synchronization level is received on the position of synchronization signal originally.

660, micro-base station sends the second synchronization signal to UE according to the synchronization level carried in synchronizing indication message.

Therefore, the method for the synchronous communication of the embodiment of the present invention is synchronized by sending include second to UE in micro-base station Grade enables and receives the second synchronization signal according to second synchronization level with UE, without interrupting synchronous communication, without Synchronization signal is re-searched for, the consumption of electric energy is reduced.

Combine Fig. 7 that the structure of the synchronizing indication message of the embodiment of Fig. 6 is described in detail in detail below.

Specifically, as shown in fig. 7, in embodiments of the present invention, synchronizing indication message 730 that the first UE is sent with synchronize refer to Show that message 720 includes: change instruction information, instruction information, synchronization level, node type information is forwarded to believe with synchronous change cycle Breath.

Change instruction information that synchronizing indication message in Fig. 7 includes, forwarding instruction information, node type information with it is synchronous Change cycle information is similar with the synchronizing indication message in Fig. 4, for sake of simplicity, details are not described herein.

In synchronizing indication message 720, synchronization level is expressed as 00, can indicate that the synchronization level of synchronization signal 710 is 0；In synchronizing indication message 730, synchronization level is expressed as 01, can indicate that the synchronization level of the second synchronization signal 740 is 1, But the embodiment of the present invention is not limited only to this.

It should be understood that in embodiments of the present invention, the synchronizing indication message of Fig. 7 can also include same in node ID, with Fig. 5 It is similar to walk instruction message, for sake of simplicity, details are not described herein.

Fig. 8 shows the schematic diagram of transmission synchronization signal according to another embodiment of the present invention.The embodiment and figure of Fig. 8 7 embodiment is similar, suitably omits detailed description herein.In contrast to the embodiment of FIG. 7 the change in synchronizing indication message More information not only includes synchronization level, but also the location information including the second synchronization signal.

As shown in figure 8, micro-base station periodically sends the first synchronization signal 810 as the first synchronisation source, then send same Walk instruction message 820.Slave node of the UE as micro-base station in micro-base station coverage area, it is synchronous in receive micro-base station first When signal 810, is synchronized and communicated with micro-base station according to the first synchronization signal 810.The first synchronization signal 810 that micro-base station is sent With synchronizing indication message 820 can be forwarded from the other node of upper level (for example, macro base station) transmission synchronization signal and synchronize refer to Show message, in this case, micro-base station can be synchronized with macro base station according to the synchronization signal that macro base station is sent and be communicated, UE can be synchronized with micro-base station according to the synchronization signal that micro-base station is sent and be communicated.

It is micro- when micro-base station learns that the synchronization level of macro base station changes according to the synchronous indicating signal that macro base station is sent Base station can send synchronizing indication message 830 to UE.As shown in figure 8, the modification information that synchronizing indication message 830 includes can refer to Show synchronization level and the position of the second synchronization signal 840.Synchronization level that micro-base station is indicated according to the modification information and position to UE sends the second synchronization signal 840.The synchronization level and position that UE is indicated according to modification information receive micro-base station is sent second Synchronization signal.

It should be understood that in embodiments of the present invention, synchronizing indication message 820 and synchronizing indication message 830 can also include section Point ID, it is similar with the synchronizing indication message in Fig. 5, for sake of simplicity, details are not described herein.

According to embodiments of the present invention, the first UE sent to the 2nd UE include the second synchronization level and the second position synchronize refer to Show message, enables the 2nd UE to receive the second synchronization signal according to the synchronization level of the second synchronization signal and position, without in Disconnected synchronous communication reduces the consumption of electric energy without re-searching for synchronization signal.

Fig. 9 shows the schematic diagram of the communication node 900 provided according to an embodiment of the present invention.Communication node 900 comprise determining that module 910, the first sending module 920 and the second sending module 930.

Determining module 910, for determining that the synchronization signal of first node changes, wherein synchronization signal before changing is First synchronization signal, the synchronization signal after change are the second synchronization signal.First sending module 920, for being sent out to second node Send the first synchronizing indication message, wherein modification information is carried in the first synchronizing indication message, modification information is for determining that second is same Walk signal.Second sending module 930, for sending the second synchronization signal to second node.

Therefore, the communication node of the embodiment of the present invention sends synchronizing indication message to other nodes by first node, makes With first node synchronize communication other nodes can according to the synchronizing indication message sink change after synchronization signal, The consumption of electric energy is reduced without re-searching for synchronization signal without interrupting synchronous communication.

According to an embodiment of the invention, modification information includes location information, it is synchronous that location information is used to indicate transmission second The frequency location of the time location of signal and/or the second synchronization signal.

According to an embodiment of the invention, modification information includes the synchronization level of the second synchronization signal.

According to an embodiment of the invention, the first sending module 920 sends first to second node in the second sending module 930 When synchronization signal, the first synchronizing indication message is sent to second node.

Optionally, as another embodiment, the first sending module 920 also disappears to the first synchronizing indication of second node transmission Before breath, according to the sending cycle of the first synchronization signal, the second synchronizing indication message is sent to second node, wherein second is same Step instruction message does not carry modification information.

According to an embodiment of the invention, the first sending module 920 is according to the sending cycle of the first synchronization signal to the second section Point sends change instruction information, and wherein change instruction information is for determining it is same whether the synchronization signal of first node is changed to second Walk signal.

Optionally, as another embodiment, the first sending module 920 is sent in the second sending module 930 to first node When the first synchronization signal, change instruction information is sent to second node；Alternatively, the first sending module 920 is in the second sending module 930 on the default running time-frequency resource after second node the first synchronization signal of transmission, send change instruction information to second node.

According to an embodiment of the invention, the first sending module 920 is sent when synchronous change cycle is reached to second node Change instruction information, wherein synchronous change cycle is the period for allowing the first synchronization signal to change.

According to an embodiment of the invention, the first synchronizing indication message further includes synchronous change cycle information, synchronous change week Phase information is used to indicate the period for allowing the first synchronization signal to change, wherein the second sending module 930 is in synchronous change week When the period of phase information instruction reaches, the second synchronization signal is sent to second node according to modification information.

Optionally, as another embodiment, message is simultaneously indicated further include: forwarding instruction information, is jumped at node type information Number information, at least one of node identification id information information, wherein forwarding instruction information be used to indicate communication node whether be Forward node, node type information are used to indicate the type of communication node, and it is which is a that hop count information, which is used to indicate communication node, The node of synchronization signal is forwarded, node ID information includes the ID of communication node.

Optionally, as another embodiment, when forwarding instruction information instruction communication node is forward node, node ID is also The ID of synchronization source node including communication node.

According to an embodiment of the invention, communication node is base station or terminal direct connection D2D equipment, at least one second node are Base station or D2D equipment.

Figure 10 shows the schematic diagram for the communication node 1000 that another embodiment provides according to the present invention.Communication section Point 1000 includes the first receiving module 1010 and the second receiving module 1020.

First receiving module 1010, for receiving first node hair when the synchronization signal for determining first node changes The the first synchronizing indication message sent, wherein synchronization signal before changing is the first synchronization signal, the synchronization signal after change is the Two synchronization signals carry modification information in the first synchronizing indication message, and modification information is for determining the second synchronization signal.Second connects Module 1020 is received, for receiving the second synchronization signal that first node is sent according to modification information.

Therefore, the communication node of the embodiment of the present invention sends synchronizing indication message to other nodes by first node, makes With first node synchronize communication other nodes can according to the synchronizing indication message sink change after synchronization signal, The consumption of electric energy is reduced without re-searching for synchronization signal without interrupting synchronous communication.

According to an embodiment of the invention, modification information includes location information, be used to indicate send the second synchronization signal when Between the frequency location of position and/or the second synchronization signal, wherein the second receiving module 1020 according to location information receive first The second synchronization signal that node is sent.

According to an embodiment of the invention, modification information includes the synchronization level of the second synchronization signal, wherein second receives mould Block 1020 receives the second synchronization signal that first node is sent according to synchronization level.

According to an embodiment of the invention, the first receiving module 1010 receives the first synchronization signal in the second receiving module 1020 When receive first synchronizing indication message.

According to an embodiment of the invention, sending cycle of first receiving module 1010 according to the first synchronization signal, the is received The second synchronizing indication message that one node is sent, wherein the second synchronizing indication message does not carry modification information.

Optionally, as another embodiment, the first receiving module 1010 connects also according to the sending cycle of the first synchronization signal The change instruction information that first node is sent is received, wherein change instruction information is for determining whether the synchronization signal of first node becomes More the second synchronization signal.

It is sent according to an embodiment of the invention, the first receiving module 1010 receives first node in the second receiving module 1020 The first synchronization signal when, receive first node send change instruction information；Alternatively, the first receiving module 1010 connects second It receives on the default running time-frequency resource after module 1020 receives the first synchronization signal, receives the change instruction information that first node is sent.

According to an embodiment of the invention, sending cycle of first receiving module 1010 according to the first synchronization signal, the is received One node sends the second synchronizing indication message, wherein the first receiving module 1010 receives second node in the second receiving module 1020 When the first synchronization signal sent, the first synchronizing indication message or the second synchronizing indication message that first node is sent are received, and First synchronizing indication message and/or the second synchronizing indication message include change instruction information；Wherein, second message is simultaneously indicated not Carry modification information.

According to an embodiment of the invention, the first receiving module 1010 receives first node when synchronous change cycle reaches The change instruction information of transmission, wherein synchronous change cycle is the period for allowing the first synchronization signal to change.

Optionally, as another embodiment, the first synchronizing indication message further includes synchronous change cycle information, synchronous change Cycle information is used to indicate the period for allowing the first synchronization signal to change, wherein the second receiving module 1020 is changed synchronous When the period of cycle information instruction reaches, the second synchronization signal that first node is sent is received according to modification information.

Optionally, as another embodiment, message is simultaneously indicated further include: forwarding instruction information, is jumped at node type information Number information, at least one of node identification id information information, wherein forwarding instruction information be used to indicate first node whether be Forward node, node type information are used to indicate the type of first node, and it is which is a that hop count information, which is used to indicate first node, The node of synchronization signal is forwarded, node ID information includes the ID of first node, wherein communication node 1000 further include: determining module 1030, for according at least one of forwarding instruction information, node type information, hop count information, node identification id information letter Breath determines whether using first node as synchronisation source.

Optionally, as another embodiment, when forwarding instruction information instruction first node is forward node, node ID is also The ID of synchronization source node including first node.

According to an embodiment of the invention, first node be base station or terminal direct connection D2D equipment, communication node be base station or D2D equipment.

Figure 11 shows the schematic diagram for the communication node 1100 that another embodiment provides according to the present invention.Such as Figure 11 Shown, which includes processor 1110, memory 1120, transmitter 1130 and bus 1140.Wherein, processor 1110, memory 1120 and transmitter 1130 are connected by bus system 1140, the memory 1120 for storing instruction, at this Reason device 1110 is used to execute the instruction of the memory 1120 storage.

Wherein, processor 1110 is used for: determining that the synchronization signal of first node changes, wherein synchronous letter before changing It number is the first synchronization signal, synchronization signal after change is the second synchronization signal.Transmitter 1130 is used for: being sent to second node First synchronizing indication message, and the second synchronization signal is sent to second node, wherein change is carried in the first synchronizing indication message Information, modification information is for determining the second synchronization signal.

Therefore, the communication node of the embodiment of the present invention sends synchronizing indication message to other nodes by first node, makes With first node synchronize communication other nodes can according to the synchronizing indication message sink change after synchronization signal, The consumption of electric energy is reduced without re-searching for synchronization signal without interrupting synchronous communication.

It should be understood that in embodiments of the present invention, which can be central processing unit (Central Processing Unit, CPU), the processor 1110 can also be other general processors, digital signal processor (DSP), Specific integrated circuit (ASIC), ready-made programmable gate array (FPGA) either other programmable logic device, discrete gate or crystalline substance Body pipe logical device, discrete hardware components etc..General processor can be microprocessor or the processor be also possible to it is any Conventional processor etc..

The memory 1120 may include read-only memory and random access memory, and refer to the offer of processor 1110 Order and data.The a part of of memory 1120 can also include nonvolatile RAM.For example, memory 1120 is also It can store the information of device type.

The bus system 1140 can also include power bus, control bus and state letter in addition to including data/address bus Number bus etc..But for the sake of clear explanation, various buses are all designated as bus system 1140 in figure.

During realization, each step of the above method can pass through the integrated logic circuit of the hardware in processor 1110 Or the instruction of software form is completed.The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly at hardware Reason device executes completion, or in processor hardware and software module combine and execute completion.Software module can be located at random Memory, flash memory, read-only memory, the abilities such as programmable read only memory or electrically erasable programmable memory, register In the storage medium of domain maturation.The storage medium is located at memory 1120, and processor 1110 reads the information in memory 1120, The step of completing the above method in conjunction with its hardware.To avoid repeating, it is not detailed herein.

According to an embodiment of the invention, modification information includes location information, it is synchronous that location information is used to indicate transmission second The frequency location of the time location of signal and/or the second synchronization signal.

According to an embodiment of the invention, modification information includes the synchronization level of the second synchronization signal.

According to an embodiment of the invention, transmitter 1130 is also used to: sending the to second node in the second sending module 930 When one synchronization signal, the first synchronizing indication message is sent to second node.

According to an embodiment of the invention, transmitter 1130 is also used to: also disappearing to the first synchronizing indication of second node transmission Before breath, according to the sending cycle of the first synchronization signal, the second synchronizing indication message is sent to second node, wherein second is same Step instruction message does not carry modification information.

According to an embodiment of the invention, transmitter 1130 is specifically used for: according to the sending cycle of the first synchronization signal to Two nodes send change instruction information, and wherein change instruction information is for determining whether the synchronization signal of first node is changed to the Two synchronization signals.

According to an embodiment of the invention, transmitter 1130 is specifically used for: when sending the first synchronization signal to first node, Change instruction information is sent to second node；Alternatively, the default running time-frequency resource after sending the first synchronization signal to second node On, change instruction information is sent to second node.

According to an embodiment of the invention, transmitter 1130 is specifically used for when synchronous change cycle reaches, to second node Change instruction information is sent, wherein synchronous change cycle is the period for allowing the first synchronization signal to change.

According to an embodiment of the invention, the first synchronizing indication message further includes synchronous change cycle information, synchronous change week Phase information is used to indicate the period for allowing the first synchronization signal to change, and wherein transmitter 1130 is specifically used for becoming synchronous When the period of more cycle information instruction reaches, the second synchronization signal is sent to second node according to modification information.

Optionally, as another embodiment, message is simultaneously indicated further include: forwarding instruction information, is jumped at node type information Number information, at least one of node identification id information information, wherein forwarding instruction information be used to indicate communication node whether be Forward node, node type information are used to indicate the type of communication node, and it is which is a that hop count information, which is used to indicate communication node, The node of synchronization signal is forwarded, node ID information includes the ID of communication node.

Optionally, as another embodiment, when forwarding instruction information instruction communication node is forward node, node ID is also The ID of synchronization source node including communication node.

According to an embodiment of the invention, communication node is base station or terminal direct connection D2D equipment, at least one second node are Base station or D2D equipment.

It should be understood that in embodiments of the present invention, communication node 1100 according to an embodiment of the present invention can correspond to according to this The executing subject of the method for inventive embodiments is also can correspond to communication node 900, and each in the communication node 900 Above and other operation and/or function of module respectively in order to realize the corresponding process of each method of the Fig. 1 into Fig. 8, in order to Succinctly, details are not described herein.

Figure 12 shows the schematic diagram for the communication node 1200 that another embodiment provides according to the present invention.Such as Figure 12 Shown, which includes processor 1210, memory 1220, transmitter 1230 and bus 1240.Wherein, processor 1210, memory 1220 and receiver 1230 are connected by bus system 1240, the memory 1220 for storing instruction, at this Reason device 1210 is used to execute the instruction of the memory 1220 storage.

Wherein, receiver 1230 is used for: receiving first node hair when the synchronization signal for determining first node changes The the first synchronizing indication message sent, and the second synchronization signal that first node is sent is received according to modification information, wherein before changing Synchronization signal be the first synchronization signal, synchronization signal after change is the second synchronization signal, is taken in the first synchronizing indication message Band modification information, modification information is for determining the second synchronization signal.

Therefore, the communication node of the embodiment of the present invention sends synchronizing indication message to other nodes by first node, makes With first node synchronize communication other nodes can according to the synchronizing indication message sink change after synchronization signal, The consumption of electric energy is reduced without re-searching for synchronization signal without interrupting synchronous communication.

It should be understood that in embodiments of the present invention, which can be central processing unit (Central Processing Unit, CPU), the processor 1210 can also be other general processors, digital signal processor (DSP), Specific integrated circuit (ASIC), ready-made programmable gate array (FPGA) either other programmable logic device, discrete gate or crystalline substance Body pipe logical device, discrete hardware components etc..General processor can be microprocessor or the processor be also possible to it is any Conventional processor etc..

The memory 1220 may include read-only memory and random access memory, and refer to the offer of processor 1210 Order and data.The a part of of memory 1220 can also include nonvolatile RAM.For example, memory 1220 is also It can store the information of device type.

The bus system 1240 can also include power bus, control bus and state letter in addition to including data/address bus Number bus etc..But for the sake of clear explanation, various buses are all designated as bus system 1240 in figure.

During realization, each step of the above method can pass through the integrated logic circuit of the hardware in processor 1210 Or the instruction of software form is completed.The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly at hardware Reason device executes completion, or in processor hardware and software module combine and execute completion.Software module can be located at random Memory, flash memory, read-only memory, the abilities such as programmable read only memory or electrically erasable programmable memory, register In the storage medium of domain maturation.The storage medium is located at memory 1220, and processor 1210 reads the information in memory 1220, The step of completing the above method in conjunction with its hardware.To avoid repeating, it is not detailed herein.

According to an embodiment of the invention, modification information includes location information, be used to indicate send the second synchronization signal when Between the frequency location of position and/or the second synchronization signal, wherein receiver 1230 according to location information receive first node send The second synchronization signal.

According to an embodiment of the invention, modification information includes the synchronization level of the second synchronization signal, wherein receiver 1230 The second synchronization signal that first node is sent is received according to synchronization level.

According to an embodiment of the invention, receiver 1230 is specifically used for: it is same to receive first when receiving the first synchronization signal Walk instruction message.

Optionally, as another embodiment, receiver 1230 is also used to: according to the sending cycle of the first synchronization signal, being connect Receive the second synchronizing indication message that first node is sent, wherein the second synchronizing indication message does not carry modification information.

Optionally, as another embodiment, receiver 1230 is also used to: being received according to the sending cycle of the first synchronization signal The change instruction information that first node is sent, wherein change instruction information is for determining whether the synchronization signal of first node changes For the second synchronization signal.

According to an embodiment of the invention, receiver 1230 is specifically used for: in the first synchronous letter for receiving first node transmission Number when, receive first node send change instruction information；Alternatively, after the second receiving module 1020 receives the first synchronization signal Default running time-frequency resource on, receive first node send change instruction information.

Optionally, as another embodiment, the first synchronizing indication message further include: forwarding instruction information, node type letter At least one of breath, hop count information, node identification id information information, wherein forwarding instruction information is used to indicate first node It whether is forward node, node type information is used to indicate the type of first node, and hop count information is used to indicate first node and is The node of which forwarding synchronization signal, node ID information includes the ID of first node, wherein processor 1210 is used for: according to Forwarding instruction information, node type information, hop count information, at least one of node identification id information information determine whether the One node is as synchronisation source.

Optionally, as another embodiment, when forwarding instruction information instruction first node is forward node, node ID is also The ID of synchronization source node including first node.

According to an embodiment of the invention, first node be base station or terminal direct connection D2D equipment, communication node be base station or D2D equipment.

It should be understood that in embodiments of the present invention, communication node 1200 according to an embodiment of the present invention can correspond to according to this The executing subject of the method for inventive embodiments is also can correspond to communication node 1000, and each in the communication node 1000 Above and other operation and/or function of a module in order to realize the corresponding process of each method of the Fig. 1 into Fig. 8, is respectively Succinct, details are not described herein.

It should be understood that the terms "and/or", only a kind of incidence relation for describing affiliated partner, expression can deposit In three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B. In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".

It should be understood that in various embodiments of the present invention, magnitude of the sequence numbers of the above procedures are not meant to execute suitable Sequence it is successive, the execution of each process sequence should be determined by its function and internal logic, the implementation without coping with the embodiment of the present invention Process constitutes any restriction.

Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed The scope of the present invention.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.

In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit It closes or communicates to connect, can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme 's.

It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.

It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention. And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right It is required that protection scope subject to.

Claims (52)

1. a kind of method of synchronous communication characterized by comprising

First node determines that the synchronization signal of first node changes, wherein synchronization signal before changing is the first synchronous letter Number, the synchronization signal after change is the second synchronization signal；

The first node sends the first synchronizing indication message to second node, wherein takes in the first synchronizing indication message Band modification information, the modification information is for determining second synchronization signal；

The first node sends second synchronization signal to the second node.

2. the position is believed the method according to claim 1, wherein the modification information includes location information Breath is used to indicate the time location of second synchronization signal and/or the frequency location of second synchronization signal.

3. method according to claim 1, which is characterized in that the modification information includes the synchronization of second synchronization signal Grade.

4. referring to the method according to claim 1, wherein the first node sends first and synchronize to second node Show message, comprising:

The first node is when sending first synchronization signal to the second node, described in the transmission of Xiang Suoshu second node First synchronizing indication message.

5. according to the method described in claim 4, it is characterized in that, in the first node to described in second node transmission Before first synchronizing indication message, the method also includes:

Sending cycle of the first node according to first synchronization signal, the second synchronizing indication of Xiang Suoshu second node transmission Message, wherein the second synchronizing indication message does not carry the modification information.

6. the method according to claim 1, wherein further include:

The first node sends change instruction information to the second node according to the sending cycle of first synchronization signal, Wherein the change instruction information is for determining whether the synchronization signal of the first node is changed to second synchronization signal.

7. according to the method described in claim 6, it is characterized in that, the first node is according to the hair of first synchronization signal The period is sent to send change instruction information to the second node, comprising:

The first node is when sending first synchronization signal to the second node, described in the transmission of Xiang Suoshu second node Change instruction information；

Alternatively,

The first node is on the default running time-frequency resource after sending the first synchronization signal to second node, Xiang Suoshu second node Send the change instruction information.

8. according to the method described in claim 6, it is characterized by further comprising:

Sending cycle of the first node according to first synchronization signal, the second synchronizing indication of Xiang Suoshu second node transmission Message, wherein the first node is when sending first synchronization signal to the second node, Xiang Suoshu second node is sent out Send the first synchronizing indication message or the second synchronizing indication message, and the first synchronizing indication message and/or described second It includes the change instruction information that message, which is simultaneously indicated,；Wherein, the second synchronizing indication message does not carry the modification information.

9. according to the method described in claim 6, it is characterized in that, the sending cycle according to first synchronization signal to The second node sends change instruction information, comprising:

For the first node when synchronous change cycle reaches, Xiang Suoshu second node sends the change instruction information, wherein The synchronous change cycle is the period for allowing first synchronization signal to change.

10. according to the method described in claim 6, it is characterized in that, the first synchronizing indication message further includes synchronous change Cycle information, the synchronous change cycle information are used to indicate the period for allowing first synchronization signal to change,

Wherein the first node sends second synchronization signal to the second node, comprising:

The first node is when reaching in the period of the synchronous change cycle information instruction, according to the modification information to described Second node sends second synchronization signal.

11. the method according to claim 1, wherein the first synchronizing indication message further include: forwarding instruction At least one of information, node type information, hop count information, node identification id information information, wherein the forwarding instruction letter Breath is used to indicate whether the first node is forward node, and the node type information is used to indicate the class of the first node Type, the hop count information are used to indicate the node which forwarding synchronization signal the first node is, the node ID information ID including the first node.

12. according to the method for claim 11, which is characterized in that indicate the first node in forwarding instruction information When for forward node, the node ID further includes the ID of the synchronization source node of the first node.

13. according to claim 1 to method described in any one of 12, which is characterized in that the first node be base station or Terminal direct connection D2D equipment, at least one described second node are base station or D2D equipment.

14. a kind of method of synchronous communication characterized by comprising

It is synchronous that second node receives first node is sent when the synchronization signal for determining the first node changes first Instruction message, wherein synchronization signal before changing is the first synchronization signal, the synchronization signal after change is the second synchronization signal, institute It states and carries modification information in the first synchronizing indication message, the modification information is for determining second synchronization signal；

The second node receives second synchronization signal that the first node is sent according to the modification information.

15. according to the method for claim 14, which is characterized in that the modification information includes location information, the position Information is used to indicate the time location of second synchronization signal and/or the frequency location of second synchronization signal, wherein

The second node receives second synchronization signal that the first node is sent according to the modification information, comprising:

The second node receives second synchronization signal that the first node is sent according to the positional information.

16. 4 the method according to claim 1, which is characterized in that the modification information includes the same of second synchronization signal Walk grade, wherein

The second node receives second synchronization signal that the first node is sent according to the modification information, comprising:

The second node receives second synchronization signal that the first node is sent according to the synchronization level.

17. according to the method for claim 14, which is characterized in that the second node receives first node described in the determination The the first synchronizing indication message sent when the synchronization signal of first node changes, comprising:

The second node receives the first synchronizing indication message when receiving first synchronization signal.

18. according to the method for claim 17, which is characterized in that receive first synchronization signal in the second node When receive it is described first synchronizing indication message before, further includes: the second node according to first synchronization signal transmission Period receives the second synchronizing indication message that the first node is sent, wherein the second synchronizing indication message does not carry institute State modification information.

19. according to the method for claim 14, which is characterized in that further include:

The second node receives the change instruction that the first node is sent according to the sending cycle of first synchronization signal Information, wherein the change instruction information is for determining it is synchronous whether the synchronization signal of the first node is changed to described second Signal.

20. according to the method for claim 19, which is characterized in that the second node is according to first synchronization signal Sending cycle receives the change instruction information that the first node is sent, comprising:

The second node receives the first node hair when receiving first synchronization signal that the first node is sent The change instruction information sent；

Alternatively,

The second node receives the institute that the first node is sent on receiving the default running time-frequency resource after the first synchronization signal State change instruction information.

21. according to the method for claim 19, which is characterized in that further include:

The second node receives the first node and sends second and synchronize and refer to according to the sending cycle of first synchronization signal Show message, wherein the second node when receiving first synchronization signal that the second node is sent, receives described the One node send it is described first synchronizing indication message or second synchronizing indication message, and it is described first synchronizing indication message and/ Or the second synchronizing indication message includes the change instruction information；Wherein, the second synchronizing indication message does not carry institute State modification information.

22. according to the method for claim 19, which is characterized in that

The second node receives the change instruction that the first node is sent according to the sending cycle of first synchronization signal Information, comprising:

The second node receives the change instruction information that the first node is sent when synchronous change cycle reaches, Wherein the synchronous change cycle is the period for allowing first synchronization signal to change.

23. according to the method for claim 19, which is characterized in that the first synchronizing indication message further includes synchronous change Cycle information, the synchronous change cycle information are used to indicate the period for allowing first synchronization signal to change,

Wherein the second node receives second synchronization signal that the first node is sent, comprising:

The second node receives institute according to the modification information when reaching in the period of the synchronous change cycle information instruction State second synchronization signal of first node transmission.

24. according to the method for claim 14, which is characterized in that the first synchronizing indication message further include: forwarding refers to Show at least one of information, node type information, hop count information, node identification id information information, wherein the forwarding instruction Information is used to indicate whether the first node is forward node, and the node type information is used to indicate the first node Type, the hop count information are used to indicate the node which forwarding synchronization signal the first node is, the node ID letter Breath includes the ID of the first node,

Wherein the method also includes:

The second node indicates information, the node type information, the hop count information, the node mark according to the forwarding Know at least one of id information information to determine whether using the first node as synchronisation source.

25. according to the method for claim 24, which is characterized in that indicate the first node in forwarding instruction information When for forward node, the node ID further includes the ID of the synchronization source node of the first node.

26. method described in any one of 4 to 25 according to claim 1, which is characterized in that the first node be base station or Terminal direct connection D2D equipment, at least one described second node are base station or D2D equipment.

27. a kind of communication node characterized by comprising

Determining module, for determining that the synchronization signal of first node changes, wherein synchronization signal before changing is first same Signal is walked, the synchronization signal after change is the second synchronization signal；

First sending module, for sending the first synchronizing indication message to second node, wherein the first synchronizing indication message Middle carrying modification information, the modification information is for determining second synchronization signal；

Second sending module, for sending second synchronization signal to the second node.

28. communication node according to claim 27, which is characterized in that the modification information includes location information, described Location information is used to indicate the frequency position of the time location and/or second synchronization signal that send second synchronization signal It sets.

29. the communication node according to claim 27, which is characterized in that the modification information includes second synchronization signal Synchronization level.

30. communication node according to claim 27, which is characterized in that first sending module is sent described second When module sends first synchronization signal to the second node, Xiang Suoshu second node sends first synchronizing indication and disappears Breath.

31. communication node according to claim 30, which is characterized in that first sending module is also to described second Before node sends the first synchronizing indication message, according to the sending cycle of first synchronization signal, the second section of Xiang Suoshu Point sends the second synchronizing indication message, wherein the second synchronizing indication message does not carry the modification information.

32. communication node according to claim 27, which is characterized in that first sending module is same according to described first The sending cycle for walking signal sends change instruction information to the second node, wherein the change instruction information is for determining institute Whether the synchronization signal for stating first node is changed to second synchronization signal.

33. communication node according to claim 32, which is characterized in that second sending module is sent described first When module sends first synchronization signal to the first node, Xiang Suoshu second node sends the change instruction information； Alternatively, first sending module is default after second sending module sends the first synchronization signal to the second node On running time-frequency resource, Xiang Suoshu second node sends the change instruction information.

34. communication node according to claim 32, which is characterized in that first sending module is same according to described first The sending cycle of signal is walked, Xiang Suoshu second node sends the second synchronizing indication message, wherein first sending module is in institute State the second sending module to the second node send first synchronization signal when, Xiang Suoshu second node send described first Message or the second synchronizing indication message is simultaneously indicated, and the first synchronizing indication message and/or second synchronizing indication disappear Breath includes the change instruction information；Wherein, the second synchronizing indication message does not carry the modification information.

35. communication node according to claim 32, which is characterized in that first sending module is in synchronous change cycle When arrival, Xiang Suoshu second node sends the change instruction information, wherein the synchronous change cycle is to allow described first The period that synchronization signal changes.

36. communication node according to claim 32, which is characterized in that the first synchronizing indication message further includes synchronizing Change cycle information, the synchronous change cycle information are used to indicate the period for allowing first synchronization signal to change, Wherein second sending module is when reaching in the period of the synchronous change cycle information instruction, according to the modification information to The second node sends second synchronization signal.

37. communication node according to claim 27, which is characterized in that the first synchronizing indication message further include: turn Bristle with anger and show at least one of information, node type information, hop count information, node identification id information information, wherein the forwarding Instruction information is used to indicate whether the communication node is forward node, and the node type information is used to indicate the communication section The type of point, the hop count information are used to indicate the node which forwarding synchronization signal the communication node is, the node Id information includes the ID of the communication node.

38. the communication node according to claim 37, which is characterized in that indicate the communication in forwarding instruction information When node is forward node, the node ID further includes the ID of the synchronization source node of the communication node.

39. the communication node according to any one of claim 27 to 38, which is characterized in that the communication node is base It stands or terminal direct connection D2D equipment, at least one described second node is base station or D2D equipment.

40. a kind of communication node characterized by comprising

First receiving module is sent when the synchronization signal for determining the first node changes for receiving first node First synchronizing indication message, wherein synchronization signal before changing is the first synchronization signal, the synchronization signal after change is second same Signal is walked, carries modification information in the first synchronizing indication message, the modification information is for determining the second synchronization signal；

Second receiving module, for receiving second synchronization signal that the first node is sent according to the modification information.

41. communication node according to claim 40, which is characterized in that the modification information includes location information, described Location information is used to indicate the time location of second synchronization signal and/or the frequency location of second synchronization signal, In, second receiving module receives second synchronization signal that the first node is sent according to the positional information.

42. the communication node according to claim 40, which is characterized in that the modification information includes second synchronization signal Synchronization level, wherein second receiving module receive that the first node sends according to the synchronization level described the Two synchronization signals.

43. communication node according to claim 40, which is characterized in that first receiving module is received described second Module receives the first synchronizing indication message when receiving first synchronization signal.

44. communication node according to claim 43, which is characterized in that first receiving module is same according to described first The sending cycle for walking signal receives the second synchronizing indication message that the first node is sent, wherein second synchronizing indication Message does not carry the modification information.

45. communication node according to claim 40, which is characterized in that first receiving module is also according to described first The sending cycle of synchronization signal receives the change instruction information that the first node is sent, wherein the change instruction information is used for Determine whether the synchronization signal of the first node is changed to second synchronization signal.

46. communication node according to claim 45, which is characterized in that first receiving module is received described second When module receives first synchronization signal that the first node is sent, receives the change that the first node is sent and refer to Show information；Alternatively, default time-frequency money of first receiving module after second receiving module receives the first synchronization signal On source, the change instruction information that the first node is sent is received.

47. communication node according to claim 45, which is characterized in that

First receiving module receives the first node and sends second together according to the sending cycle of first synchronization signal Walk instruction message, wherein first receiving module receive that the second node sends in second receiving module described the When one synchronization signal, the first synchronizing indication message or the second synchronizing indication message that the first node is sent are received, and The first synchronizing indication message and/or the second synchronizing indication message include the change instruction information；Wherein, described Two synchronizing indication message do not carry the modification information.

48. communication node according to claim 45, which is characterized in that first receiving module is in synchronous change cycle When arrival, the change instruction information that the first node is sent is received, wherein the synchronous change cycle is described in permission The period that first synchronization signal changes.

49. communication node according to claim 45, which is characterized in that the first synchronizing indication message further includes synchronizing Change cycle information, the synchronous change cycle information are used to indicate the period for allowing first synchronization signal to change, Wherein second receiving module connects when reaching in the period of the synchronous change cycle information instruction according to the modification information Receive second synchronization signal that the first node is sent.

50. communication node according to claim 40, which is characterized in that the synchronizing indication message further include: forwarding refers to Show at least one of information, node type information, hop count information, node identification id information information, wherein the forwarding instruction Information is used to indicate whether the first node is forward node, and the node type information is used to indicate the first node Type, the hop count information are used to indicate the node which forwarding synchronization signal the first node is, the node ID letter Breath includes the ID of the first node,

The wherein communication node further include: determining module, for indicating that information, the node type are believed according to the forwarding At least one of breath, the hop count information, node identification id information information determine whether using the first node as Synchronisation source.

51. communication node according to claim 50, which is characterized in that in forwarding instruction information instruction described first When node is forward node, the node ID further includes the ID of the synchronization source node of the first node.

52. the communication node according to any one of claim 40 to 51, which is characterized in that the first node is base It stands or terminal direct connection D2D equipment, the communication node is base station or D2D equipment.