CN103313376A

CN103313376A - Communication method, user equipment and network side equipment

Info

Publication number: CN103313376A
Application number: CN 201210067282
Authority: CN
Inventors: 周明宇; 周永行; 夏亮; 任晓涛
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2012-03-14
Filing date: 2012-03-14
Publication date: 2013-09-18
Also published as: WO2013135185A1

Abstract

The embodiment of the invention provides a communication method, user equipment (UE) and network side equipment. The communication method comprises the following steps of determining first downlink synchronization timing and determining second downlink synchronization timing according to a detection signal received from a network side; receiving a first downlink signal according to the first downlink synchronization timing, and receiving a second downlink signal according to the second downlink synchronization timing. Due to the adoption of the technical scheme, the UE can receive different downlink signals according to different downlink synchronization timing, so that symbol interference on these signals is avoided, and the transmission efficiency of downlink signals is increased.

Description

Communication means, subscriber equipment and network equipment

Technical field

The present invention relates to the communications field, more specifically, relate to a kind of communication means, subscriber equipment and network equipment.

Background technology

In a wireless communication system, network equipment sends downstream signal to UE, UE can determine the zero hour (determining that namely down-going synchronous regularly) of received downstream signal according to the downstream signal of receiving, and regularly receives other signal constantly according to this down-going synchronous.

In the prior art, UE usually only with a node communication, therefore only need to keep getting final product synchronously with a node, for example, the downlink synchronous signal that UE sends according to this node is determined down-going synchronous regularly, and regularly receives other signal that this node sends according to this down-going synchronous.

Along with development of technology, that people have proposed is a kind of, and (namely a plurality of nodes can the same UE of federated service for Coordinated Multiple Point, CoMP) transmission technology, thereby utilizes the resource of a plurality of nodes to promote the efficient of communication.In the system of an employing CoMP transmission technology, because a plurality of nodes are communicated by letter with same UE, if the downlink synchronous signal that UE sends according to certain node is determined the down-going synchronous timing of the downstream signal of other node, may cause the intersymbol interference of the downstream signal of other node, thereby make that the efficiency of transmission of downstream signal is not high.

Summary of the invention

One aspect of the present invention provides a kind of communication means, subscriber equipment and network equipment, can improve the efficiency of transmission of downstream signal.

On the one hand, provide a kind of communication means, having comprised: determined first down-going synchronous regularly and determine that second down-going synchronous regularly according to the detection signal that receives from network side; Regularly receive first downstream signal according to first down-going synchronous, regularly receive second downstream signal according to second down-going synchronous.

On the other hand, a kind of communication means is provided, comprise: control node control first network equipment and second network equipment send detection signal to user equipment (UE), and this detection signal is used for this UE and determines first down-going synchronous regularly according to this detection signal and determine that second down-going synchronous regularly; This control node control first network equipment sends first downstream signal to this UE, and controls second network equipment and send second downstream signal to this UE.

On the other hand, provide a kind of subscriber equipment, having comprised: determination module is used for determining first down-going synchronous regularly and determining that second down-going synchronous regularly according to the detection signal that receives from network side; Receiver module is used for regularly receiving first downstream signal according to first down-going synchronous, regularly receives second downstream signal according to second down-going synchronous.

On the other hand, a kind of network equipment is provided, comprise: first control module, be used for control first network equipment and second network equipment and send detection signal to user equipment (UE), this detection signal is used for this UE and determines first down-going synchronous regularly according to this detection signal and determine that second down-going synchronous regularly; Second control module is used for control first network equipment and sends first downstream signal to this UE, and controls second network equipment and send second downstream signal to this UE.

The technical program can be subjected to intersymbol interference to avoid these signals, thereby improve the efficiency of transmission of downstream signal so that UE regularly receives different downstream signals according to different down-going synchronous.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, to do to introduce simply to the accompanying drawing of required use in the embodiment of the invention below, apparently, below described accompanying drawing only be some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Figure 1A is the frame structure schematic diagram of LTE system.

Figure 1B illustrates the schematic diagram that UE receives the downstream signal of a network equipment.

Fig. 1 C illustrates the schematic diagram that UE receives the downstream signal of heterogeneous networks side apparatus.

Fig. 2 is the indicative flowchart of communication means according to an embodiment of the invention.

Fig. 3 is the indicative flowchart of communication means according to an embodiment of the invention.

Fig. 4 A is the schematic diagram of the mapping of the reference signal in the Physical Resource Block.

Fig. 4 B is the time-multiplexed schematic diagram of PDSCH and PDCCH.

Fig. 4 C is the schematic diagram of PDSCH and PDCCH frequency division multiplexing.

Fig. 5 A is the schematic diagram of heterogeneous networks side apparatus transmission of downlink signal.

Fig. 5 B is the schematic diagram of heterogeneous networks side apparatus transmission of downlink signal according to an embodiment of the invention.

Fig. 6 is the indicative flowchart of communication process according to an embodiment of the invention.

Fig. 7 is the indicative flowchart of communication process according to another embodiment of the present invention.

Fig. 8 is the structural schematic diagram of subscriber equipment according to another embodiment of the present invention.

Fig. 9 is the structural schematic diagram of network equipment according to another embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work should belong to the scope of protection of the invention.

Should understand, technical scheme of the present invention can be applied to various communication systems, for example: global system for mobile telecommunications (GSM, Global System of Mobile communication) system, code division multiple access (CDMA, Code Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access) system, GPRS (GPRS, General Packet Radio Service), Long Term Evolution (LTE, Long Term Evolution) system, advanced Long Term Evolution (LTE-A, Long term evolution-Advanced) system, universal mobile telecommunications system (UMTS, Universal Mobile Telecommunication System) etc., the embodiment of the invention does not limit, but for convenience of description, the embodiment of the invention will be that example describes with the LTE network.

The embodiment of the invention can be used for the wireless network of different standards.Radio Access Network can comprise different network elements in different systems.For example, LTE (Long Term Evolution, Long Term Evolution) and LTE-A (Long term evolution-Advanced, advanced Long Term Evolution) network element of Radio Access Network comprises eNB (eNodeB in, evolved base station), WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) network element of Radio Access Network comprises RNC (Radio Network Controller in, radio network controller) and NodeB, similarly, WiMax (Worldwide Interoperability for Microwave Access, worldwide interoperability for microwave inserts) wait other wireless network also can use and the similar scheme of the embodiment of the invention, just the correlation module in the base station system may be different, the embodiment of the invention does not limit, but for convenience of description, following embodiment will be that example describes with eNodeB.

Will also be understood that, in embodiments of the present invention, subscriber equipment (UE, User Equipment) includes but not limited to travelling carriage (MS, Mobile Station), portable terminal (Mobile Terminal), mobile phone (Mobile Telephone), mobile phone (handset) and portable equipment (portable equipment) etc., this subscriber equipment can be through wireless access network (RAN, Radio Access Network) communicates with one or more core net, for example, subscriber equipment can be mobile phone (or being called " honeycomb " phone), have the computer of radio communication function etc., subscriber equipment can also be portable, pocket, hand-hold type, built-in computer or vehicle-mounted mobile device.

The CoMP transmission technology is introduced cooperation between a plurality of network equipments (being also referred to as node), and shares information (for example, channel condition information, schedule information and data message etc.) between network equipment, to eliminate presence of intercell interference.Can be applied to the cooperative multipoint transmission technology according to embodiments of the invention, yet, being not limited to this according to embodiments of the invention, embodiments of the invention can be used for a plurality of network equipments (or node) send scene from downstream signal to UE.

Figure 1A is the frame structure schematic diagram of LTE system.Referring to Figure 1A, a radio frames comprises 10 Transmission Time Intervals (Transmission Time Interval, TTI), each TTI comprises 14 symbols, each symbol (for example, the OFDM symbol) by Cyclic Prefix (Cyclic Prefix, CP) signal section and ofdm signal are partly formed, length is respectively d_cp and d_ofdm.The CP signal section is copying of ofdm signal decline signal partly.

Figure 1B illustrates the schematic diagram that UE receives the downstream signal of a network equipment.For example, in the t1 moment, network equipment sends downstream wireless signals, can experience different path because wireless signal is propagated aloft, therefore, has different time-delays when experiencing the downstream wireless signals arrival UE in different paths.If the distance that downstream wireless signals experiences from the network equipment to UE is d, then UE can receive that constantly (c represents the speed 3 * 10 of electromagnetic transmission to downstream wireless signals at t1+d/c ⁸M/s), Figure 1B shows downstream wireless signals through the example of three paths arrival UE, and corresponding distance is respectively d1, d2 and d3, and the signal that UE receives is the stack of these signals.Because the existence of CP, UE can be from t2 constantly, and intercepted length is the signal of d_ofdm, and for this three paths, the signal that intercepts all only comprises the signal of same symbol, so just can not disturb between created symbol.If there is not CP, then second path and Third Road footpath part signal foremost just belongs to previous symbol, at this moment, if come intercept signal according to the ofdm signal window shown in Figure 1B, then can cause intersymbol interference.

The downstream signal that network equipment sends can send according to the form of Figure 1B.If have only a network equipment to send downstream signal to UE, then UE just can only need to determine a down-going synchronous, can obtain other signal according to the form of Figure 1B, for example, in a TTI, UE can only determine that at the 1st downlink synchronous signal that symbol sends down-going synchronous regularly according to network equipment, again according to determined down-going synchronous regularly receive other all symbols (for example from t2 constantly after second symbol of 1 sign-on reception), in the prior art namely, UE only needs to receive all downstream signals according to single synchronization timing.

Fig. 1 C illustrates the schematic diagram that UE receives the downstream signal of heterogeneous networks side apparatus.When a plurality of network equipments are served same UE, will there be such problem: if used prior art, can cause UE (for example to determine the corresponding downlink synchronous signal of down-going synchronous, this signal is sent by network equipment 1) may be not from the consolidated network side apparatus with other signal (being sent by network equipment 2), will disturb between created symbol like this, make that the efficiency of transmission of CoMP technology is not high.For example, network equipment 1 is grand station, and network equipment 2 is little stations, and the distance of grand station and UE is than the distance of little station and UE, the transmitted power at grand station is greater than the transmitted power at little station, like this, though the more close network equipment 2 of UE,, because the difference of the transmitted power of these two network equipments, it is little that UE receives the power difference of signal of network equipment 1 and network equipment 2, and therefore, the signal influence each other that their send is very important.

Referring to Fig. 1 C, suppose that network equipment 1 and network equipment 2 all send signal to UE, then because the distance between network equipment 1 and the UE is bigger, therefore the UE signal that receives first footpath that network equipment 1 sends just is later than the signal that UE receives first footpath that network equipment 2 sends, if use prior art, UE receives signal from network equipment 1 and network equipment 2 according to the down-going synchronous of network equipment 1 correspondence, then can cause intersymbol interference.Particularly, UE at first determines the ofdm signal window according to the down-going synchronous of network equipment 1, and intercept signal in this ofdm signal window, for the signal that receives from network equipment 1, can not be subjected to the influence of intersymbol interference, and for the signal that receives from network equipment 2, because its signal arrives UE early than the signal that network equipment 1 sends, therefore, also comprise the signal (as black part sub-signal among Fig. 1 C) of next symbol in this ofdm signal window, namely introduced intersymbol interference.

The time that provides above can be the time with respect to the starting point of a symbol, for example, on absolute sense, the signal that network equipment 1 sends is to be numbered 0 symbol (namely for network equipment 1, t1 is the starting point that is numbered 0 symbol), the signal that network equipment 2 sends then is to be numbered 2 symbol (namely for network equipment 2, t1 is the starting point that is numbered 2 symbol); UE determines down-going synchronous regularly as if the signal that sends at the symbol that is numbered 0 according to network equipment 1, and regularly receives 2 symbols signal afterwards according to down-going synchronous, and intersymbol interference will take place.

Fig. 2 is the indicative flowchart of communication means according to an embodiment of the invention.The method of Fig. 2 is carried out by subscriber equipment.

210, determine first down-going synchronous regularly and determine that second down-going synchronous is regularly according to the detection signal that receives from network side.

220, regularly receive first downstream signal according to first down-going synchronous, regularly receive second downstream signal according to second down-going synchronous.

First downstream signal and second downstream signal can be respectively sent at identical carrier wave with second network equipment by first network equipment of network side.For example, first network equipment and second network side can be implemented as base station, access point (Access Point, AP), far-end wireless device (Remote Radio Equipment, RRE), far-end radio port (Remote Radio Head, RRH), the far-end radio-cell (Remote Radio Unit, RRU) or junction network side apparatus (Relay Node) etc.

For example, above-mentioned detection signal can be for the down-going synchronous of determining downstream signal downlink synchronous signal regularly.The timing of first down-going synchronous and second down-going synchronous are regularly respectively at first downstream signal and second downstream signal.

Can use different down-going synchronous to the different downstream signals that the heterogeneous networks side apparatus sends according to embodiments of the invention, in other words, can be so that UE regularly receives signal from first network equipment according to first down-going synchronous, regularly receive signal from second network equipment according to second down-going synchronous again, guaranteed down-going synchronous that UE determines downstream signal regularly used downlink synchronous signal and this downstream signal from the consolidated network side apparatus.

Can be so that UE regularly receive different downstream signals according to different down-going synchronous according to embodiments of the invention, with the intersymbol interference of avoiding these signals to be subjected to, thereby improved the efficiency of transmission of downstream signal.

In 210, can determine first down-going synchronous regularly according to first detection signal that receives, and determine that according to second detection signal that receives second down-going synchronous regularly.

For example, network equipment can send the signal that detects sequence modulation to UE, makes UE to obtain down-going synchronous by the signal of above-mentioned detection sequence modulation.For example, UE can obtain first down-going synchronous according to first signal that detects sequence modulation, first signal that detects sequence modulation includes but not limited to public reference signal (Common Reference Signal, CRS) or channel condition information-reference signal (Channel State Information-Reference Signal, CSI-RS).UE can obtain second down-going synchronous regularly according to second signal that detects sequence modulation, and second signal that detects sequence modulation includes but not limited to CRS or CSI-RS.

Alternatively, as another embodiment, the method for Fig. 2 also comprises: receive and the first detection signal information corresponding, wherein in 210, can receive first detection signal according to this and the first detection signal information corresponding, and determine that according to first detection signal first down-going synchronous regularly.

Alternatively, as another embodiment, the method for Fig. 2 also comprises: receive and the second detection signal information corresponding, wherein in 210, can receive second detection signal according to this and the second detection signal information corresponding, and determine that according to second detection signal second down-going synchronous regularly.

For example, network equipment can send the information corresponding with first down-going synchronous to UE, and UE receives the signal of the first detection sequence modulation according to this information after receiving this information.Equally, network equipment also can send the information corresponding with second down-going synchronous to UE, and UE receives the signal of the second detection sequence modulation according to this information after receiving this information.Here, the main body that sends information to UE is not limit, can be first network equipment, second network equipment or other network equipment, can also be the combination of these equipment, and for example first network equipment and second network equipment are united to UE and sent described information; This information can comprise the information (for example, the numbering of sequence) of time-frequency lattice point and sequence, and UE can know that according to this information the signal of which sequence modulation that will receive at which time-frequency lattice point is used for determining down-going synchronous.Be not limited to this according to embodiments of the invention, can also do not need network equipment to send corresponding synchronously information to UE, and come the signal of receiving sequence modulation according to existing information.For example, also can determine the time-frequency lattice point according to UE detected residential quarter ID in access network process, and at the signal of the described time-frequency lattice point reception first detection sequence modulation or the signal of the second detection sequence modulation, wherein, the signal of sequence modulation also can obtain by residential quarter ID, and obtains the time-frequency lattice point and can be preset in UE and network side according to the mode (or formula) that residential quarter ID obtains the signal of sequence modulation according to residential quarter ID.As a kind of embodiment of combination, for first down-going synchronous, UE can not need network equipment to receive the signal of the first detection sequence modulation to the synchronous corresponding information of UE transmission; For second down-going synchronous, network equipment can send the information corresponding with second down-going synchronous to UE, and UE receives the signal of the second detection sequence modulation according to this information after receiving this information.

According to embodiments of the invention, in 210, determine that according to first detection signal that receives first down-going synchronous regularly; Receive synchronism deviation information from this network side, wherein this synchronism deviation information is indicated downlink transfer time poor of downlink transfer time of first downstream signal and second downstream signal; And regularly determine that with this synchronism deviation information second down-going synchronous regularly according to first down-going synchronous.

For example, UE can receive synchronism deviation information from network side (first network equipment or second network equipment or center control nodes), and UE regularly determines that with this synchronism deviation information second down-going synchronous regularly according to first down-going synchronous.For example, the deviation information that network equipment sends the first down-going synchronous timing t 1 and the second down-going synchronous timing t 2 to UE (for example, t2-t1), UE determines the first down-going synchronous t1 according to the method for prior art, determines the second down-going synchronous t2 according to this deviation information again.

For example, first network equipment can be known the time of the signal that receives the UE transmission by the upward signal that detects the UE transmission, second network equipment can be known the time of the signal that receives the UE transmission by the upward signal that detects the UE transmission, first network equipment, second network equipment can be shared the time that they receive the signal of UE transmission separately, thereby can calculate the time deviation information of upward signal.Because the path of upward signal and downstream signal transmission experience is basic identical, therefore, just can determine the deviation information of down-going synchronous according to the time of reception deviation information of the upward signal that obtains, for example, first network equipment and second network equipment send downstream signal simultaneously, and then the time of reception deviation of upward signal also just equals the deviation of down-going synchronous.First network equipment, second network equipment and center control nodes can be shared the time of reception of upward signal, in order to calculate the down-going synchronous deviation information.

According to embodiments of the invention, first downstream signal is the control signaling, and second downstream signal is user data.

In other words, first downstream signal is used for control channel, and second downstream signal is used for transmitting user data.The control signaling is the PDCCH in the LTE system for example, and user data is the PDSCH in the LTE system for example.For example, in the CoMP technology, UE can receive the control signaling that a network equipment sends, and receives the user data that other network equipment sends.In this case, if UE regularly receives control signaling and user data according to identical down-going synchronous, then when big apart from difference between above-mentioned heterogeneous networks side apparatus and the UE, can be because intersymbol interference causes the poor-performing of UE when certain signal that receives wherein.Therefore, if adopt the method for embodiments of the invention, then can when using the down-going synchronous of heterogeneous networks side apparatus correspondence to receive control signaling and user data respectively, UE can take into account the performance that UE receives these two kinds of signals.

Alternatively, as another embodiment, first downstream signal is the control signaling, the reference signal of second downstream signal for being used for measuring.

In other words, first downstream signal is used for control channel, and second downstream signal is used for the reference signal of transmission measurement purposes.For example, before scheduling UE received user data, the downlink reference signal that also needs UE to send by the measurement network equipment obtained descending CSI and feeds back network equipment, in order to dispatch accurately according to channel conditions usually.Therefore, before second network equipment sends user data to UE, also need to send downlink reference signal (for example, the CSI-RS in the LTE system) to UE, be convenient to the down channel that UE measures the second network equipment correspondence.In other words, second downstream signal also can be the downlink reference signal of measuring for UE.

Alternatively, as another embodiment, first downstream signal is respectively the different reference signals that is used for measurement with second downstream signal.

In other words, first downstream signal and second downstream signal are respectively applied to transmit the reference signal of different measurement purposes.For example, before transmission first downstream signal, also need UE to obtain descending CSI and feedback by the downlink reference signal of measuring the network equipment transmission, in order to dispatch accurately according to channel conditions, therefore, first downstream signal also can be the downlink reference signal of measuring for UE.

Alternatively, as another embodiment, first downstream signal should be controlled the reference signal of signaling for being used for demodulation, and second downstream signal is for being used for the reference signal of demodulation user data.

In other words, first downstream signal can be for being used for the reference signal of demodulation control signaling, and second downstream signal can be for being used for the reference signal of demodulation user data.For example, network equipment sends control signaling or user data to UE, all can send reference signal simultaneously usually, is convenient to UE and carries out channel estimating according to corresponding reference signal, control signaling or user data demodulation could be come out then.For example, in the LTE system, also can send CRS when network equipment sends control signaling to UE, when UE sends user data, also can send demodulated reference signal (Demodulation Reference Signal, DM RS); For the channel conditions that makes reference signal experience with to control signaling or user data identical, these reference signals also need to adopt the down-going synchronous identical with controlling signaling or user data.

According to embodiments of the invention, in same TTI, first downstream signal transmits in the different time with second downstream signal, and perhaps first downstream signal transmits at different subcarriers with second downstream signal.

In other words, first downstream signal and second downstream signal adopt the mode of time division multiplexing or frequency division multiplexing to transmit, be not limited to this according to embodiments of the invention, for example, first downstream signal and second downstream signal can also adopt the mode of code division multiplexing to transmit according to an embodiment of the invention.

For example, in same TTI, first downstream signal is transmitted in different time/frequencies with second downstream signal.In other words, these network equipments send the power that does not send signal on the time/frequency of signal or reduce signal the other side, can further reduce interference each other.By such method, just avoided the overlapping of first downstream signal and second downstream signal, thereby avoided the interference between them.Further, adopt different down-going synchronous just can obtain to avoid these two kinds of signals to produce the benefit of intersymbol interference to them respectively.

According to embodiments of the invention, at first downstream signal and second downstream signal under the situation of different time transmission, above-mentioned TTI comprises for the symbol of control channel and is used for the symbol of transmitting user data, first downstream signal is the control signaling, second downstream signal is user data, and the time span sum of the time span of first downstream signal and second downstream signal is less than the length of this Transmission Time Interval.

For example, if in same TTI, first downstream signal is transmitted in the different time with second downstream signal, then send to the time span sum of first downstream signal of UE and second downstream signal less than the length of a TTI, exist with the data-signal of avoiding control signaling that first network equipment sends and the transmission of second network equipment overlapping, thereby prevent phase mutual interference between the two.。

In 220, can regularly receive first downstream signal of the top n symbol transmission of this symbol that is used for control channel according to first down-going synchronous, wherein this N is used for the number of the symbol of control channel less than this.

For example, network equipment only sends control signaling to UE on the part symbol of the control signaling area of a TTI.UE only receives the signal of part N symbol of control signaling area, and this N symbol is the top n symbol of control signaling area.

In 220, can regularly receive second downstream signal of back M symbol transmission of this symbol that is used for transmitting user data according to second down-going synchronous, wherein this M is used for the number of the symbol of transmitting user data less than this.

For example, network equipment only sends user data to UE on the part symbol of the user data area of a TTI.UE only receives the signal of part M symbol of data area, and this M symbol is last M symbol of data area.

Alternatively, as another embodiment, the method of Fig. 1 also comprises: receive synchronous indication information from this network side, this synchronous indication information is used to indicate determines that second down-going synchronous regularly and according to second down-going synchronous regularly receives second downstream signal, wherein in 210, can after receiving this synchronous indication information, determine that second down-going synchronous regularly.

For example, network equipment sends many signalings that receive synchronously to UE, after UE receives, receives first downstream signal and second downstream signal according to different down-going synchronous.

Because the present invention UE of CoMP technology that has been application-oriented, and only have part UE to use the CoMP technology in a network, therefore UE does not know whether need to adopt the present invention to receive downstream signal, therefore, network equipment sends signaling to UE and notifies and need adopt first down-going synchronous to receive first downstream signal by use UE of the present invention, and adopt second down-going synchronous to receive second downstream signal, be convenient to UE and cooperate consistent with network equipment.

Fig. 3 is the indicative flowchart of communication means according to an embodiment of the invention.The method of Fig. 3 is carried out by network equipment.The method of Fig. 3 is corresponding with the method for Fig. 2, does not repeat them here.

310, control node control first network equipment and second network equipment send detection signal to user equipment (UE), and this detection signal is used for this UE and determines first down-going synchronous regularly according to this detection signal and determine that second down-going synchronous regularly.

320, this control node control first network equipment sends first downstream signal to this UE, and controls second network equipment and send second downstream signal to this UE.

For example, above-mentioned detection signal can be for being used for determining the down-going synchronous downlink synchronous signal regularly of downstream signal.First network equipment sends first downstream signal and second downstream signal with second network equipment at identical carrier wave.

For example, the control node is used for making first network equipment and the cooperation of second network equipment to provide service for UE, in addition, the control node can also be used for the resource of scheduling first network equipment and/or second network equipment, make the UE that is subjected to first network equipment and/or the second network equipment service all be assigned with enough resources and communicate by letter, and can control the processes such as switching of UE between first network equipment and second network equipment.

Can control first network equipment and second network equipment sends detection signal to UE according to embodiments of the invention, so that UE regularly receives downstream signal from the heterogeneous networks side apparatus according to different down-going synchronous, with the intersymbol interference of avoiding these signals to be subjected to, thereby improved the efficiency of transmission of downstream signal.

According to embodiments of the invention, in 310, this control node control first network equipment sends first detection signal to this UE; This control node control second network equipment sends second detection signal to this UE.

Alternatively, as another embodiment, the method of Fig. 3 also comprises: this control node control second network equipment sends the information corresponding with second detection signal to this UE transmission information or this control node corresponding with second detection signal to this UE, so that this UE is according to should the information corresponding with second detection signal receiving second detection signal.

In 310, this control node control first network equipment sends first detection signal to this UE, so that UE determines that according to first detection signal first down-going synchronous regularly; The first downlink transfer time of the downstream signal that this control node sends to this UE according to first network equipment and second network equipment are determined synchronism deviation information to the second downlink transfer time of the downstream signal that this UE sends, wherein this synchronism deviation information is the poor of the first downlink transfer time and the second downlink transfer time, wherein the method for Fig. 3 also comprises: this control node sends synchronism deviation information to this UE, so that this UE regularly determines that with this synchronism deviation information second down-going synchronous regularly according to first down-going synchronous.

Alternatively, as another embodiment, first downstream signal is this control signaling, the reference signal of second downstream signal for being used for measuring.

According to embodiments of the invention, in same Transmission Time Interval, first downstream signal transmits in the different time with second downstream signal, and perhaps first downstream signal transmits at different subcarriers with second downstream signal.

According to embodiments of the invention, at first downstream signal and second downstream signal under the situation of different time transmission, this Transmission Time Interval comprises for the symbol of control channel and is used for the symbol of transmitting user data, first downstream signal is the control signaling, second downstream signal is user data, and the time span sum of the time span of first downstream signal and second downstream signal is less than the length of this Transmission Time Interval.

In 320, this control node control first network equipment sends first downstream signal by the top n symbol that this is used for the symbol of control channel to this UE, and wherein this N is used for the number of the symbol of control channel less than this.

In 320, this control node control second network equipment sends second downstream signal by back M the symbol that this is used for the symbol of transmitting user data to this UE, and wherein this M is used for the number of the symbol of transmitting user data less than this.

Alternatively, as another embodiment, the method for Fig. 3 also comprises: this control node sends synchronous indication information to this UE, is used to indicate to determine that second down-going synchronous regularly and according to second down-going synchronous regularly receives second downstream signal.

According to embodiments of the invention, this control node is the center control nodes that is independent of outside first network equipment and second network equipment; Perhaps this control node is first network equipment or second network equipment.

Below in conjunction with object lesson, embodiments of the invention are described in further detail.

Fig. 4 A is the schematic diagram of the mapping of the reference signal in the Physical Resource Block.Fig. 4 B be Physical Downlink Shared Channel (Physical Downlink Shared Channel, PDSCH) and Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) time-multiplexed schematic diagram.Fig. 4 C is the schematic diagram of PDSCH and PDCCH frequency division multiplexing.Fig. 5 A is the schematic diagram of heterogeneous networks side apparatus transmission of downlink signal.Fig. 5 B is the schematic diagram of heterogeneous networks side apparatus transmission of downlink signal according to an embodiment of the invention.Fig. 6 is the indicative flowchart of communication process according to an embodiment of the invention.Fig. 6 is the example of Fig. 2 and Fig. 3.

In the CoMP technology, can be a network equipment of fixing to the network equipment of UE control channel, make UE only need detect the control signaling that a network equipment sends like this and get final product, thereby reduced the complexity of UE detection.Yet, can dynamic change to the network equipment of UE transmitting user data, for example, first network equipment can send data to UE in a TTI, second network equipment can send data to UE in the 2nd TTI, like this can be according to channel conditions and the state of affairs of heterogeneous networks side apparatus correspondence, the only network equipment of Dynamic Selection sends user data to UE, be that (Dynamic Point Selection DSP), thereby promotes efficiency of transmission in the dynamic node selection.For example, for these two kinds of signals, the control signaling can comprise: (for example pass through the PDCCH information transmitted in the LTE system, being used for scheduling UE sends up or receive downstream signal) or the feedback information by the PHICH transmission is (for example, be used for " whether network equipment is correctly decoded the information of the PUSCH of previous transmission " notice UE is convenient to UE and is determined whether retransmitting PUSCH according to this information).For example, user data can comprise: by the PDSCH information transmitted.

According to an embodiment of the disclosure with first downstream signal serve as the control signaling (for example, PDCCH), second downstream signal be user data (for example, PDSCH) and above-mentioned detection signal (being downlink synchronous signal) be that example describes for CRS or CSI-RS.

605, center control nodes can cooperate with first network equipment, in order to unite first network equipment and second network equipment provides service to UE.

For example, center control nodes can be the base station, first network equipment can be far-end wireless device or access point etc., for example, base station this far-end wireless device of unified control (with other wireless device) sends or receives, and specifically is included as the UE scheduling resource of communicating by letter with this far-end wireless device, determines that this far-end wireless device sends to the signaling of UE, generates base band or radiofrequency signal that this far-end wireless device sends, handles signal that this far-end wireless device receives from UE etc.; And this far-end wireless device only possesses the function that sends and receive signal, specifically comprises obtaining signaling from the base station and sending to UE, send to UE (perhaps obtain radiofrequency signal from the base station and send to UE), receive the upward signal of UE transmission and be transmitted to base station etc. after the base station obtains base band and converts radiofrequency signal to.First network equipment and second network equipment can be shared information (for example, channel condition information, schedule information and data message etc.) by center control nodes.

610, center control nodes can cooperate with second network equipment, in order to unite first network equipment and second network equipment provides service to UE.

For example, second network equipment can be far-end wireless device or access point etc.First network equipment and second network equipment can be shared information (for example, channel condition information, schedule information and data message etc.) by center control nodes.

620, center control nodes can send synchronous indication information to UE.

For example, this synchronous indication information is used to indicate UE and determines that for different downstream signals different down-going synchronous regularly and according to different down-going synchronous regularly receives different downstream signals, for example, indication information can be a flag bit synchronously, and the value of this flag bit is that 1 indication UE regularly receives second downstream signal according to second down-going synchronous.The value of this flag bit is that 0 expression UE adopts conventional method to carry out down-going synchronous.This synchronous indication information can be special signaling message, also can carry by existing signaling message.

Since embodiments of the invention application-oriented the UE of CoMP technology, if only have part UE to use the CoMP technology in the network, UE does not know whether need to adopt embodiments of the invention to receive downstream signal so, therefore, network equipment can (for example send signaling to UE, the signaling that comprises synchronous indication information) notify needs to use the UE of embodiments of the invention regularly to receive first downstream signal according to first down-going synchronous, and regularly receive second downstream signal according to second down-going synchronous, so that UE cooperates consistent with network equipment.

Alternatively, also can send this synchronous indication information to UE by first network equipment or second network equipment.

Should be understood that 620 is optional, for example, when the UE in the network in the time of may adopting the UE of CoMP technology, can omit 620.

630, the first network equipments can send first downlink synchronous signal to UE.

For example, in the LTE system, first downlink synchronous signal can be the detection sequence, for example, and CRS or CSI-RS.Fig. 4 A shows the time-frequency lattice point (being also referred to as a RE) of these signal correspondences, wherein the configuration of CRS can be by all UE of broadcast announcement, CRS exists at each TTI, and occupying the whole system bandwidth (is all Physical Resource Block shown in Fig. 4 B and Fig. 4 C (Physical Resource Block, PRB)).Because CRS density is bigger, obtains down-going synchronous by CRS and can obtain precision preferably.And the configuration of CSI-RS is notified single UE by the clean culture form, is not to exist at each TTI; Obtain down-going synchronous by CSI-RS, then can be by being chosen as the heterogeneous networks side apparatus that certain UE (for example by the UE of a plurality of network equipment federated service) sends CSI-RS neatly, thus make certain UE correspondingly carry out down-going synchronous with the heterogeneous networks side apparatus.

For example, can set in advance certain time-frequency lattice point at certain TTI in network side or UE side sends or receives and be specifically designed to CRS or the CSI-RS that carries out down-going synchronous.

Alternatively, network equipment can send the time-frequency lattice point information of the signal that detects sequence modulation to UE, the signal of the detection sequence modulation that UE can send according to this residential quarter of the time-frequency lattice point validation of information that receives, and obtain first down-going synchronous by the signal that detects this detection sequence modulation.

Alternatively, network equipment can further send first network equipment corresponding district sign (ID) to UE, make UE can confirm the signal of the detection sequence modulation that this residential quarter sends according to the first network equipment corresponding district ID, and obtain first down-going synchronous by detecting this signal.

640, UE can determine that first down-going synchronous regularly according to first downlink synchronous signal.

For example, UE (is for example receiving first downlink synchronous signal, adopt the CRS that detects sequence form) time, the CRS sequence that UE this locality can be obtained is carried out convolution operation with the CRS that receives, and with corresponding moment of value of surpassing thresholding at first among the result who obtains after the convolution operation as the moment that receives first downlink synchronous signal, and determine the timing of first down-going synchronous accordingly.Should be understood that definite downlink synchronizing method that can adopt other routine determines that first down-going synchronous regularly, does not repeat them here.

650, UE can regularly receive first downstream signal according to first down-going synchronous.

Referring to Fig. 4 B, first downstream signal is the PDCCH signal, is transmitted (example that Fig. 4 B provides N_t=2) at preceding N_t the symbol of a TTI.For example, can determine first down-going synchronous according to certain CRS on first symbol of Fig. 4 B regularly, and regularly receive the PDCCH that transmits on second symbol according to first down-going synchronous.

Alternatively, referring to Fig. 4 C, first downstream signal is the PDCCH signal, is transmitted (example that figure below provides N_f=2) at N_f the PRB of a TTI.For example, can determine first down-going synchronous according to certain CRS in the PDCCH zone on first symbol regularly, and regularly receive the PDCCH that transmits on other symbol according to first down-going synchronous.

660, the second network equipments can send second downlink synchronous signal to UE.

For example, in the LTE system, second downlink synchronous signal can be CRS or CSI-RS.660 and 530 is similar, do not repeat them here.

Alternatively, second network equipment sends the time-frequency lattice point information of the signal that detects sequence modulation to UE, the signal of the detection sequence modulation that UE can send according to this residential quarter of the time-frequency lattice point validation of information that receives, and obtain second down-going synchronous by the signal that detects this detection sequence modulation.

Alternatively, second network equipment can further send the second network equipment corresponding district ID to UE, make UE can be according to the second network equipment corresponding district ID, confirm the signal of the detection sequence modulation that this residential quarter sends, and obtain second down-going synchronous by the signal that detects this detection sequence modulation.

670, UE can determine that second down-going synchronous regularly according to second downlink synchronous signal.

For example, UE (is for example receiving second downlink synchronous signal, adopt the CRS that detects sequence form) time, the CRS sequence that UE this locality can be obtained is carried out convolution operation with the CRS that receives, and with corresponding moment of value of surpassing thresholding at first among the result who obtains after the convolution operation as the moment that receives second downlink synchronous signal, and determine the timing of second down-going synchronous accordingly.

680, UE can regularly receive second downstream signal according to second down-going synchronous.

Referring to Fig. 4 B, second downstream signal is the PDSCH signal, is transmitted at other symbol except PDCCH.In other words, PDSCH and PDCCH adopt time-multiplexed mode to transmit.Referring to Fig. 4 B, can determine second down-going synchronous regularly according to certain CRS that is numbered on 4 the symbol of Fig. 4 B, and regularly receive the PDSCH that transmits on the symbol in PDSCH zone according to second down-going synchronous.

Alternatively, referring to Fig. 4 C, second downstream signal is the PDSCH signal, is transmitted at other PRB except PDCCH.In other words, PDSCH and PDCCH adopt the mode of frequency division multiplexing to transmit.Referring to Fig. 4 C, can determine second down-going synchronous according to certain CRS in the PDSCH zone on first symbol regularly, and regularly receive the PDSCH that transmits on other symbol according to second down-going synchronous.

In addition, if the relation of first downstream signal and second downstream signal is shown in Fig. 4 B, then can there be the situation shown in Fig. 5 A, be that example describes below with N_t=2, be that network equipment 1 sends control signaling to UE at preceding 2 symbols, network equipment 2 sends control signaling to UE on 12 symbols in the back, if the distance of network equipment 1 and UE is greater than the distance of network equipment 2 with UE, then UE receives that the time of the signal of network equipment 1 is later than the time of the signal of receiving network equipment 2, like this, the control signaling that network equipment 1 sends at the 2nd symbol just with network equipment 2 exist at the 3rd data-signal that symbol sends overlapping, so will the phase mutual interference between the two.

In order to address this problem, can make network equipment 2 reduce the number of symbols that sends data-signal, shown in Fig. 5 B, be that network equipment 2 does not send signal (particularly to this UE on the 3rd symbol, in this symbol, do not send signal on the PRB of this UE distributing to, perhaps transmitted power is 0), so just avoided overlapping.Similarly, also can make network equipment 1 reduce the number of symbols that sends control signaling, repeat no more here.

In addition, in the prior art, the feature of each symbol that comprises among TTI is different, and for example shown in Fig. 4 A, CRS appears at and is numbered on 0,4,7,11 the symbol, and does not comprise CRS on other symbol; UE is when the signal of a TTI who receives the network equipment transmission, can remove to receive descending various signals according to such form (pattern), for example, form according to preceding 2 symbols (for example receives PDCCH, the 1st symbol in the PDCCH territory receives CRS), form according to 14-2 the symbol in back receives PDSCH (for example, the 3rd symbol in the PDSCH territory receives CRS).

According to embodiments of the invention, the PDCCH that UE receives is from first network equipment, and preceding 2 symbols of a corresponding TTI should (for example receive according to the form of preceding 2 symbols, the 1st symbol in the PDCCH territory receives CRS, and this is same as the prior art).And the PDSCH that UE receives is from second network equipment, and the back 14-1-2 symbol (for example the 2nd symbol in the PDSCH territory receives CRS) of a corresponding TTI should receive according to the form of back 11 symbols.

Above-mentioned only is the form that example illustrates these symbols with CRS, and in fact, what show these forms also comprises signals such as CSI-RS, DM RS, and principle is identical, repeats no more here.

Should be understood that 630 to 650 and 660 to 680 can carry out in proper order, also can carry out simultaneously or the transpose execution.

Fig. 7 is the indicative flowchart of communication process according to another embodiment of the present invention.Fig. 7 is the example of Fig. 2 and Fig. 3.730,740,750 and 780 630,640,650 and 680 identical with Fig. 6 of Fig. 7 do not repeat them here.

710, the first network equipments can cooperate with second network equipment, provide service in order to unite second network equipment to UE.

For example, first network equipment can be used as the control node.Can share information (for example, channel condition information, schedule information and data message etc.) between first network equipment and second network equipment.

720, the first network equipments can send synchronous indication information to UE.620 similar with Fig. 6 given unnecessary details at this again.

730, the first network equipments can send first downlink synchronous signal to UE.

740, UE can determine that first down-going synchronous regularly according to first downlink synchronous signal.

750, UE can regularly receive first downstream signal according to first down-going synchronous.

760, the first network equipments send synchronism deviation information to UE.

For example, first network equipment can be known the time of the signal that receives the UE transmission by the upward signal that detects the UE transmission, second network equipment can be known the time of the signal that receives the UE transmission by the upward signal that detects the UE transmission, first network equipment, second network equipment can be shared the time that they receive the signal of UE transmission separately, thereby can calculate the time deviation information of upward signal.For example first network equipment and second network equipment send downstream signal simultaneously, and then the time of reception deviation of upward signal also just equals the deviation of down-going synchronous.First network equipment and second network equipment can be shared the time of reception of upward signal, in order to calculate the down-going synchronous deviation information.

770, UE can determine that second down-going synchronous regularly according to the timing of first down-going synchronous and synchronism deviation signal.

For example, UE determines the first down-going synchronous timing t 1 according to the method for prior art, determines the second down-going synchronous timing t 2 according to this synchronism deviation information again.

780, UE can regularly receive second downstream signal according to second down-going synchronous.

Describe the communication means according to the embodiment of the invention above, described subscriber equipment and network equipment according to the embodiment of the invention in conjunction with Fig. 8 and Fig. 9 respectively below.

Fig. 8 is the structural schematic diagram of subscriber equipment 800 according to another embodiment of the present invention.Subscriber equipment 800 comprises: determination module 810 and receiver module 820.

Determination module 810 is determined first down-going synchronous regularly according to the detection signal that receives from network side and is determined that second down-going synchronous regularly.Receiver module 820 regularly receives first downstream signal according to first down-going synchronous, regularly receives second downstream signal according to second down-going synchronous.

Determination module 810 is determined first down-going synchronous regularly according to first detection signal that receives, and determines that according to second detection signal that receives second down-going synchronous regularly.

Receiver module 820 also receives and the second detection signal information corresponding, receives second detection signal according to this and the second detection signal information corresponding, and determines that according to second detection signal second down-going synchronous regularly.

Receiver module 810 also determines that according to first detection signal that receives first down-going synchronous regularly, and receive synchronism deviation information from this network side, wherein this synchronism deviation information is indicated downlink transfer time poor of downlink transfer time of first downstream signal and second downstream signal, this determination module according to first down-going synchronous regularly and this synchronism deviation information determine that second down-going synchronous regularly.

Alternatively, as another embodiment, first downstream signal is this control signaling, the reference signal of second downstream signal for being used for measuring; Perhaps

According to embodiments of the invention, this receiver module 820 regularly receives this for first downstream signal that the top n symbol of the symbol of control channel sends according to first down-going synchronous, and wherein this N is used for the number of the symbol of control channel less than this.

According to embodiments of the invention, receiver module 820 regularly receives this for second downstream signal that back M symbol of the symbol of transmitting user data sends according to second down-going synchronous, and wherein this M is used for the number of the symbol of transmitting user data less than this.

Receiver module 820 also receives synchronous indication information from this network side, this synchronous indication information is used to indicate determines that second down-going synchronous regularly and according to second down-going synchronous regularly receives second downstream signal, wherein this determination module determines that second down-going synchronous regularly after receiving this synchronous indication information.

The operation of each module of subscriber equipment 800 and function can for fear of repetition, not repeat them here with reference to the method for above-mentioned Fig. 2.

Fig. 9 is the structural schematic diagram of network equipment 900 according to another embodiment of the present invention.Network equipment 900 comprises: first control module 910 and second control module 920.

First control module, 910 control first network equipments and second network equipment send detection signal to user equipment (UE), and this detection signal is used for this UE and determines first down-going synchronous regularly according to this detection signal and determine that second down-going synchronous regularly.Second control module 920 control, first network equipment sends first downstream signal to this UE, and controls second network equipment and send second downstream signal to this UE, and wherein first downstream signal is sent out at identical carrier wave with second downstream signal.

Can control first network equipment and second network equipment sends detection signal to UE according to embodiments of the invention, so that UE regularly receives downstream signal from the heterogeneous networks side apparatus according to different down-going synchronous, the just intersymbol interference that can avoid these signals to be subjected to, thus the efficiency of transmission of CoMP technology improved.

According to embodiments of the invention, first control module is controlled first network equipment and is sent first detection signal to this UE, and controls second network equipment and send second detection signal to this UE.

Alternatively, as another embodiment, the control of first control module also sends the information corresponding with second detection signal or for sending the information corresponding with second detection signal to this UE, receive second detection signal so that this UE basis is somebody's turn to do the information corresponding with second detection signal to this UE for controlling second network equipment.

Alternatively, as another embodiment, first control module is controlled first network equipment and is sent first detection signal to this UE, so that UE determines that according to first detection signal first down-going synchronous regularly; The first downlink transfer time of the downstream signal that first control module sends to this UE according to first network equipment and second network equipment are determined synchronism deviation information to the second downlink transfer time of the downstream signal that this UE sends, wherein this synchronism deviation information is the poor of the first downlink transfer time and the second downlink transfer time, and network equipment 900 also comprises sending module 930.Sending module 930 sends synchronism deviation information to this UE, so that this UE regularly determines that with this synchronism deviation information second down-going synchronous regularly according to first down-going synchronous.

According to embodiments of the invention, in same Transmission Time Interval, first downstream signal and the different time transmission of second downstream signal at same carrier wave, perhaps first downstream signal and second downstream signal transmit in the different sub carrier of same carrier wave.

According to embodiments of the invention, second control module is controlled first network equipment and is sent first downstream signal by the top n symbol that this is used for the symbol of control channel to this UE, and wherein this N is used for the number of the symbol of control channel less than this.

Alternatively, as another embodiment, second control module is controlled second network equipment and is sent second downstream signal by back M the symbol that this is used for the symbol of transmitting user data to this UE, and wherein this M is used for the number of the symbol of transmitting user data less than this.

Alternatively, as another embodiment, network equipment 900 also comprises sending module 930.Sending module 930 sends synchronous indication information to this UE, is used to indicate to determine that second down-going synchronous regularly and according to second down-going synchronous regularly receives second downstream signal.

According to embodiments of the invention, this network equipment is the center control nodes that is independent of outside first network equipment and second network equipment; Perhaps this network equipment is first network equipment or second network equipment.

The operation of each module of network equipment 900 and function can for fear of repetition, not repeat them here with reference to the method for above-mentioned Fig. 3.

The embodiment of the invention also provides a kind of communication system can comprise the described subscriber equipment of above-described embodiment and network equipment.

Those of ordinary skills can recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, composition and the step of each example described in general manner according to function in the above description.These functions still are that software mode is carried out with hardware actually, depend on application-specific and the design constraint of technical scheme.The professional and technical personnel can specifically should be used for using distinct methods to realize described function to each, but this realization should not thought and exceeds scope of the present invention.

The those skilled in the art can be well understood to, and is the convenience described and succinct, and the concrete course of work of the system of foregoing description, device and unit can not repeat them here with reference to the corresponding process among the preceding method embodiment.

In several embodiment that the application provides, should be understood that disclosed system, apparatus and method can realize by other mode.For example, device embodiment described above only is schematic, for example, the division of described unit, only be that a kind of logic function is divided, during actual the realization other dividing mode can be arranged, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, the shown or coupling each other discussed or directly to be coupled or to communicate to connect can be by some interfaces, the indirect coupling of device or unit or communicate to connect can be electrically, machinery or other form.

Described unit as separating component explanation can or can not be physically to separate also, and the parts that show as the unit can be or can not be physical locations also, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select wherein some or all of unit to realize the purpose of present embodiment scheme according to the actual needs.

In addition, each functional unit in each embodiment of the present invention can be integrated in the processing unit, also can be that the independent physics in each unit exists, and also can be integrated in the unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, also can adopt the form of SFU software functional unit to realize.

If described integrated unit is realized with the form of SFU software functional unit and during as independently production marketing or use, can be stored in the computer read/write memory medium.Based on such understanding, part or all or part of of this technical scheme that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD.

The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.

Claims

1. a communication means is characterized in that, comprising:

Determine first down-going synchronous regularly and determine that second down-going synchronous regularly according to the detection signal that receives from network side;

Regularly receive first downstream signal according to described first down-going synchronous, regularly receive second downstream signal according to described second down-going synchronous.

2. communication means according to claim 1 is characterized in that, the detection signal that described basis receives from network side is determined first down-going synchronous regularly and determined that second down-going synchronous regularly, comprising:

Determine that according to first detection signal that receives described first down-going synchronous regularly;

Determine that according to second detection signal that receives described second down-going synchronous regularly.

3. according to the described communication means in the claim 2, it is characterized in that, also comprise:

Receive and the described second detection signal information corresponding,

Second detection signal that wherein said basis receives obtains second down-going synchronous regularly, comprising:

Receive described second detection signal according to the described and described second detection signal information corresponding, and determine that according to described second detection signal described second down-going synchronous regularly.

4. communication means according to claim 1 is characterized in that, the detection signal that described basis receives from network side is determined first down-going synchronous regularly and determined that second down-going synchronous regularly, comprising:

Receive synchronism deviation information from described network side, wherein said synchronism deviation information is indicated downlink transfer time poor of downlink transfer time of described first downstream signal and second downstream signal;

Determine that according to described first down-going synchronous timing and described synchronism deviation information described second down-going synchronous regularly.

5. according to each the described communication means in the claim 1 to 4, it is characterized in that described first downstream signal is the control signaling, described second downstream signal is user data; Perhaps

Described first downstream signal is described control signaling, the reference signal of described second downstream signal for being used for measuring; Perhaps

Described first downstream signal is respectively the different reference signals that is used for measurement with described second downstream signal; Perhaps

Described first downstream signal is for being used for the reference signal of the described control signaling of demodulation, and described second downstream signal is for being used for the reference signal of demodulation user data.

6. according to each the described communication means in the claim 1 to 5, it is characterized in that, in same Transmission Time Interval, described first downstream signal transmits in the different time with described second downstream signal, and perhaps described first downstream signal transmits at different subcarriers with described second downstream signal.

7. communication means according to claim 6, it is characterized in that, at described first downstream signal and described second downstream signal under the situation of different time transmission, described Transmission Time Interval comprises for the symbol of control channel and is used for the symbol of transmitting user data, described first downstream signal is the control signaling, described second downstream signal is user data, and the time span sum of the time span of described first downstream signal and described second downstream signal is less than the length of described Transmission Time Interval.

8. communication means according to claim 7 is characterized in that, describedly regularly receives first downstream signal that described first network equipment sends according to described first down-going synchronous, comprising:

Regularly receive first downstream signal that the top n symbol of described symbol for control channel sends according to described first down-going synchronous, wherein said N is less than the number of described symbol for control channel.

9. communication means according to claim 7 is characterized in that, describedly regularly receives second downstream signal that described second network equipment sends according to described second down-going synchronous, comprising:

Regularly receive second downstream signal that back M symbol of described symbol for transmitting user data sends according to described second down-going synchronous, wherein said M is less than the number of described symbol for transmitting user data.

10. according to each the described communication means in the claim 1 to 9, it is characterized in that, also comprise:

Receive synchronous indication information from described network side, described synchronous indication information is used to indicate determines that described second down-going synchronous regularly and according to described second down-going synchronous regularly receives described second downstream signal,

Wherein said definite second down-going synchronous regularly comprises:

After receiving described synchronous indication information, determine that described second down-going synchronous regularly.

11. a communication means is characterized in that, comprising:

Control node control first network equipment and second network equipment send detection signal to user equipment (UE), and described detection signal is used for described UE and determines first down-going synchronous regularly according to described detection signal and determine that second down-going synchronous regularly;

Described first network equipment of described control node control sends first downstream signal to described UE, and controls described second network equipment and send second downstream signal to described UE.

12. the described communication means according in the claim 11 is characterized in that, described control node control first network equipment and second network equipment send detection signal to user equipment (UE), comprising:

Described first network equipment of described control node control sends first detection signal to described UE;

Described second network equipment of described control node control sends second detection signal to described UE.

13. the described communication means according in the claim 12 is characterized in that, also comprises:

Described second network equipment of described control node control sends the information corresponding with described second detection signal to described UE transmission information or the described control node corresponding with described second detection signal to described UE, so that described UE receives described second detection signal according to the corresponding information of described and described second detection signal.

14. communication means according to claim 11 is characterized in that,

Described control node control first network equipment and second network equipment send detection signal to user equipment (UE), comprising:

Described first network equipment of described control node control sends first detection signal to described UE, so that UE determines that according to described first detection signal first down-going synchronous regularly;

The first downlink transfer time of the downstream signal that described control node sends to described UE according to described first network equipment and described second network equipment are determined synchronism deviation information to the second downlink transfer time of the downstream signal that described UE sends, wherein said synchronism deviation information is the poor of the described first downlink transfer time and the second downlink transfer time, and this communication means also comprises:

Described control node sends synchronism deviation information to described UE, so that described UE determines that according to described first down-going synchronous timing and described synchronism deviation information described second down-going synchronous regularly.

15. each the described communication means according in the claim 11 to 14 is characterized in that, described first downstream signal is the control signaling, and described second downstream signal is user data; Perhaps

16. according to each the described communication means in the claim 11 to 15, it is characterized in that, in same Transmission Time Interval, described first downstream signal transmits in the different time with described second downstream signal, and perhaps described first downstream signal transmits at different subcarriers with described second downstream signal.

17. communication means according to claim 16, it is characterized in that, at described first downstream signal and described second downstream signal under the situation of different time transmission, described Transmission Time Interval comprises for the symbol of control channel and is used for the symbol of transmitting user data, described first downstream signal is the control signaling, described second downstream signal is user data, and the time span sum of the time span of described first downstream signal and described second downstream signal is less than the length of described Transmission Time Interval.

18. communication means according to claim 17 is characterized in that, described first network equipment of described control node control sends first downstream signal to described UE, comprising:

Described first network equipment of described control node control sends first downstream signal by the top n symbol of described symbol for control channel to described UE, and wherein said N is less than the number of described symbol for control channel.

19. communication means according to claim 17 is characterized in that, described control node control second network equipment sends second downstream signal to described UE, comprising:

Described second network equipment of described control node control sends second downstream signal by back M symbol of described symbol for transmitting user data to described UE, and wherein said M is less than the number of described symbol for transmitting user data.

20. each the described communication means according in the claim 11 to 19 is characterized in that, also comprises:

Described control node sends synchronous indication information to described UE, is used to indicate to determine that described second down-going synchronous regularly and according to described second down-going synchronous regularly receives described second downstream signal.

21. each the described communication means according in the claim 11 to 20 is characterized in that, described control node is the center control nodes that is independent of outside described first network equipment and described second network equipment; Perhaps described control node is described first network equipment or described second network equipment.

22. a subscriber equipment is characterized in that, comprising:

Determination module is used for determining first down-going synchronous regularly and determining that second down-going synchronous regularly according to the detection signal that receives from network side;

Receiver module is used for regularly receiving first downstream signal according to described first down-going synchronous, regularly receives second downstream signal according to described second down-going synchronous.

23. subscriber equipment according to claim 22 is characterized in that, described determination module is determined described first down-going synchronous regularly according to first detection signal that receives, and determines that according to second detection signal that receives described second down-going synchronous regularly.

24. according to the described subscriber equipment in the claim 23, it is characterized in that, described receiver module also receives and the described second detection signal information corresponding, receive described second detection signal according to the described and described second detection signal information corresponding, and determine that according to described second detection signal described second down-going synchronous regularly.

25. subscriber equipment according to claim 22, it is characterized in that, described receiver module also determines that according to first detection signal that receives described first down-going synchronous regularly, and receive synchronism deviation information from described network side, wherein said synchronism deviation information is indicated downlink transfer time poor of downlink transfer time of described first downstream signal and second downstream signal, described determination module according to described first down-going synchronous regularly and described synchronism deviation information determine described second down-going synchronous timing.

26. each the described subscriber equipment according in the claim 22 to 25 is characterized in that, described first downstream signal is the control signaling, and described second downstream signal is user data; Perhaps

27. according to each the described subscriber equipment in the claim 22 to 26, it is characterized in that, in same Transmission Time Interval, described first downstream signal transmits in the different time with described second downstream signal, and perhaps described first downstream signal transmits at different subcarriers with described second downstream signal.

28. subscriber equipment according to claim 27, it is characterized in that, at described first downstream signal and described second downstream signal under the situation of different time transmission, described Transmission Time Interval comprises for the symbol of control channel and is used for the symbol of transmitting user data, described first downstream signal is the control signaling, described second downstream signal is user data, and the time span sum of the time span of described first downstream signal and described second downstream signal is less than the length of described Transmission Time Interval.

29. subscriber equipment according to claim 28, it is characterized in that, described receiver module regularly receives first downstream signal that the top n symbol of described symbol for control channel sends according to described first down-going synchronous, and wherein said N is less than the number of described symbol for control channel.

30. subscriber equipment according to claim 28, it is characterized in that, described receiver module regularly receives second downstream signal that back M symbol of described symbol for transmitting user data sends according to described second down-going synchronous, and wherein said M is less than the number of described symbol for transmitting user data.

31. according to each the described subscriber equipment in the claim 22 to 30, it is characterized in that, described receiver module also receives synchronous indication information from described network side, described synchronous indication information is used to indicate determines that described second down-going synchronous regularly and according to described second down-going synchronous regularly receives described second downstream signal, wherein said determination module determines that described second down-going synchronous regularly after receiving described synchronous indication information.

32. a network equipment is characterized in that, comprising:

First control module, be used for control first network equipment and second network equipment and send detection signal to user equipment (UE), described detection signal is used for described UE and determines first down-going synchronous regularly according to described detection signal and determine that second down-going synchronous regularly;

Second control module is used for described first network equipment of control and sends first downstream signal to described UE, and controls described second network equipment and send second downstream signal to described UE.

33. according to the described network equipment in the claim 32, it is characterized in that, described first control module is controlled described first network equipment and is sent first detection signal to described UE, and controls described second network equipment and send described second detection signal to described UE.

34. according to the described network equipment in the claim 33, it is characterized in that, the control of described first control module also is used for described second network equipment of control and sends the information corresponding with described second detection signal or be used for to the described UE transmission information corresponding with described second detection signal, so that described UE receives described second detection signal according to the corresponding information of described and described second detection signal to described UE.

35. network equipment according to claim 32 is characterized in that,

Described first control module is controlled described first network equipment and is sent first detection signal to described UE, so that UE determines that according to described first detection signal first down-going synchronous regularly;

The first downlink transfer time of the downstream signal that described first control module sends to described UE according to described first network equipment and described second network equipment are determined synchronism deviation information to the second downlink transfer time of the downstream signal that described UE sends, wherein said synchronism deviation information is the poor of the described first downlink transfer time and the second downlink transfer time, and described network equipment also comprises:

Sending module is used for sending synchronism deviation information to described UE, so that described UE determines that according to described first down-going synchronous timing and described synchronism deviation information described second down-going synchronous regularly.

36. each the described network equipment according in the claim 32 to 35 is characterized in that, described first downstream signal is the control signaling, and described second downstream signal is user data; Perhaps

37. according to each the described network equipment in the claim 32 to 36, it is characterized in that, in same Transmission Time Interval, described first downstream signal transmits in the different time with described second downstream signal, and perhaps described first downstream signal transmits at different subcarriers with described second downstream signal.

38. according to the described network equipment of claim 37, it is characterized in that, at described first downstream signal and described second downstream signal under the situation of different time transmission, described Transmission Time Interval comprises for the symbol of control channel and is used for the symbol of transmitting user data, described first downstream signal is the control signaling, described second downstream signal is user data, and the time span sum of the time span of described first downstream signal and described second downstream signal is less than the length of described Transmission Time Interval.

39. according to the described network equipment of claim 38, it is characterized in that, described second control module is controlled the top n symbol of described first network equipment by described symbol for control channel and is sent first downstream signal to described UE, and wherein said N is less than the number of described symbol for control channel.

40. according to the described network equipment of claim 38, it is characterized in that, described second control module is controlled back M the symbol of described second network equipment by described symbol for transmitting user data and is sent second downstream signal to described UE, and wherein said M is less than the number of described symbol for transmitting user data.

41. each the described network equipment according in the claim 32 to 34 is characterized in that, also comprises:

Sending module is used for sending synchronous indication information to described UE, is used to indicate to determine that described second down-going synchronous regularly and according to described second down-going synchronous regularly receives described second downstream signal.

42. each the described network equipment according in the claim 32 to 41 is characterized in that, described network equipment is the center control nodes that is independent of outside described first network equipment and described second network equipment; Perhaps described network equipment is described first network equipment or described second network equipment.