CN103684558A - Multipoint collaborative transmission processing method and system - Google Patents
Multipoint collaborative transmission processing method and system Download PDFInfo
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Abstract
The invention provides a multipoint collaborative transmission processing method and a system. The method comprises the steps as follows: determining a sending mode of sending a common reference signal (CRS) to user equipment (UE), wherein the sending mode is to send the CRS only by a macrocell in a heterogeneous network or to send the CRS by the macrocell and a low-power node triggered to send the CRS; implementing the multipoint collaborative transmission processing according to the determined sending mode. Through the multipoint collaborative transmission processing method, the problems of low resource utilization rate and severe road damage fuzzy of the power control in the multipoint collaborative transmission of related technologies are solved, so that the resource utilization rate of the multipoint collaborative transmission is effectively improved, the road damage fuzzy of the power control is relieved to a certain extent, and the effect of covering backward users is guaranteed.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of coordinated multipoint transmission processing method and system.
Background technology
In order to improve spectrum efficiency and user's impression of Cell Edge User, at LTE Release 10 and Release 11, introduced coordinated multipoint transmission (Multi-point Coordinated Transmission and reception, referred to as CoMP) technology.The CoMP scenario 4 mentioning at LTE R11, in many aspects, there is larger advantage, these advantages comprise, (1) reference signal (Common Reference Signal openly Macro(macrocell) and between low power nodes, referred to as CRS) disturb, reduce the dependence to CRS; (2) be convenient to the quadrature of minizone demodulated reference signal (Demodulation Reference Signal, referred to as DMRS); (3) can carry out channel condition information-reference signal (Channel State Information – Reference Signal, referred to as CSI-RS) configuration flexibly; (4) be convenient to the interferometry based on CSI-RS; (5) subscriber equipment (User Equipment, referred to as UE) is moved and has robustness (not needing frequent switching).
But due under this scene, CRS adopts single frequency network (Single Frequency Network, referred to as SFN) mode send, in order to adapt to based on CRS, carry out Physical Downlink Shared Channel (Physical Downlink Shared Channel, referred to as PDSCH) demand of demodulation, PDSCH data also must be carried out SFN transmission at all nodes simultaneously, therefore, in the more situation of the UE based on CRS transmission, have the problem that resource utilization is low.Fig. 1 is the schematic diagram based on CRS transmission while there is more UE in correlation technique under scenario 4 scenes, as shown in Figure 1, in scenario4, in order to be embodied as certain given earlier version user (UE# 1 based on CRS transmission), carry out data transmission, even if some low power nodes (Low Power Point, referred to as LPN) (as several low power nodes on the left side in Fig. 1) very little to the contribution of the UE based on CRS transmission, but under this scene, but its UE service that is this based on CRS transmission of mandatory requirement, these signals do not have beneficial effect, but wasted resource, in figure
shown resource, cannot be reused by other low power nodes, and low power nodes can only be in the shared transmitted over resources of UE of running counter to based on CRS transmission, in figure
shown resource.
In addition, in order to guarantee correct demodulation PDSCH, under different low power nodes, must identical Pa and the Pb value of configuration, otherwise, because terminal cannot be determined each node and, to the path loss situation of UE, cannot determine the ratio relation of final PDSCH and CRS.Even and if configured Pa, Pb parameter value is identical, and (wherein Pa is characterized on respective antenna port, when there is no the OFDM symbol of CRS, or when CRS does not use PDSCH power, CRS and PDSCH transmitted signal power ratio relation, Pb is illustrated on respective antenna port, when CRS has used after PDSCH power, CRS and PDSCH transmitted power ratio relation), when network side is determined the transmitted power parameter of CRS, can only be also that the CRS transmitted power of different low power nodes is added.And then the path loss that UE measures is equivalent path loss
suppose that UE is very near apart from certain low power nodes, network side is difficult to the most effectively determine the path loss information of different nodes, thereby is unfavorable for the configuration to the downlink power control of the UE based on CRS transmission; Meanwhile, the UE uplink power control based on CRS transmission is to be also difficult to control effectively according to different uplink receiving nodes, thereby has increased the interference to other up users.
Therefore, the coordinated multipoint transmission in correlation technique exists resource utilization not high, and the fuzzy serious problem of path loss in power control.
Summary of the invention
The invention provides a kind of coordinated multipoint transmission processing method and device, with the coordinated multipoint transmission at least solving in correlation technique, exist resource utilization not high, and the fuzzy serious problem of path loss in power control.
According to an aspect of the present invention, a kind of coordinated multipoint transmission processing method is provided, comprise: determine the send mode that sends public reference signal CRS to user equipment (UE), wherein, described send mode comprises: only the macrocell in heterogeneous network sends described CRS, or, the common described CRS of transmission of low power nodes by described macrocell with the transmission CRS that is triggered; Described send mode according to determining, carries out coordinated multipoint transmission processing.
Preferably, determining after described UE sends the send mode of public reference signal CRS, also comprise: described low power nodes configures interferometry resource IMR for user, in order to obtain the interference of described low power nodes surrounding environment to described low power nodes, wherein, described IMR is zero energy channel condition information-reference signal CSI-RS; And/or described macrocell configures IMR for user, in order to obtain the interference of described macrocell surrounding environment to described macrocell, wherein, described IMR is zero energy CSI-RS.
Preferably, determine by described macrocell be triggered and send the common described CRS of transmission of low power nodes of CRS after, also comprise: described macrocell with described in the low power nodes that the sends CRS mode by single frequency network SFN that is triggered send described CRS; And/or, according to the described send mode of determining, carry out coordinated multipoint transmission and process and comprise: described macrocell with described in be triggered to send in the resource that the low power nodes of CRS distributes to the UE based on CRS demodulation by the mode of SFN and send business datum.
Preferably, determine by described macrocell and comprise with the common described CRS of transmission of low power nodes of the transmission CRS that is triggered: described in determining by predetermined condition, be triggered and send the low power nodes of CRS.
Preferably, described predetermined condition comprise following one of at least: the channel quality information CQI of UE feedback, low power nodes are to the path loss information of UE, the positional information of UE.
Preferably, after the common described CRS of transmission of low power nodes determining by described macrocell and the transmission CRS that is triggered, also comprise: described in the be triggered low power nodes that sends CRS at described macrocell, send on the corresponding resource list RE of described CRS not mapping (enum) data, and/or, at described macrocell, send the identical data of RE that on the corresponding resource list RE of described CRS, mapping closes on described RE.
Preferably, also comprise: scheduled duration is set, and while not receiving business datum to be transmitted or uplink scheduling request in described scheduled duration, described low power nodes enters silent status, wherein, the described low power nodes in silent status quits work.
Preferably, determine by described macrocell be triggered and send the common described CRS of transmission of low power nodes of CRS after, also comprise that described low power nodes one of at least closes sending CRS by following triggering mode: described low power nodes triggers and closes sending CRS according to user type; Described low power nodes is closed sending CRS according to the notification triggers of closing receiving from described macrocell.
Preferably, determining after described UE sends the send mode of public reference signal CRS, also comprising: in the following manner one of at least to described UE transmitting system message and/or beep-page message: all low power nodes that covered by described macrocell and described macrocell send described system message and/or beep-page message in the mode of single frequency network SFN to described UE; By described macrocell and the low power nodes that trigger to send CRS, in the mode of described SFN, to described UE, send described system message and/or beep-page message.
Preferably, determining after described UE sends the send mode of public reference signal CRS, also comprise: in the following manner one of at least to described UE transmitting channel control message, wherein, described channel control message comprise following one of at least: Physical Downlink Control Channel message, physics HARQ indicating channel message, control channel form channel massage, Physical Broadcast Channel message: only by macrocell, send described channel control message; The all low power nodes that covered by described macrocell and described macrocell send described channel control message in the mode of single frequency network SFN to described UE; By described macrocell and the low power nodes that trigger to send CRS, in the mode of described SFN, to described UE, send described channel control message.
According to a further aspect in the invention, a kind of coordinated multipoint transmission treatment system is provided, comprise: determination module, for determining the send mode that sends public reference signal CRS to user equipment (UE), wherein, described send mode comprises: only the macrocell in heterogeneous network sends described CRS, or, the common described CRS of transmission of low power nodes by described macrocell with the transmission CRS that is triggered; Processing module, for according to the described send mode of determining, carries out coordinated multipoint transmission processing.
Preferably, also comprise: the first configuration module, be arranged in described low power nodes, be used to user to configure interferometry resource IMR, in order to obtain the interference of described low power nodes surrounding environment to described low power nodes, wherein, described IMR is zero energy channel condition information-reference signal CSI-RS; And/or the second configuration module, is arranged in described macrocell, is used to user to configure IMR, in order to obtain the interference of described macrocell surrounding environment to described macrocell, wherein, described IMR is zero energy CSI-RS.
Preferably, described determination module, sends the low power nodes of CRS for being triggered described in determining by predetermined condition.
Preferably, also comprise: module is set, for scheduled duration is set, while not receiving business datum to be transmitted or uplink scheduling request in described scheduled duration, described low power nodes enters silent status, and wherein, the described low power nodes in silent status quits work.
By the present invention, the send mode that sends public reference signal CRS to user equipment (UE) is determined in employing, and wherein, described send mode comprises: only the macrocell in heterogeneous network sends described CRS, or, the common described CRS of transmission of low power nodes by described macrocell with the transmission CRS that is triggered; According to the described send mode of determining, carry out coordinated multipoint transmission processing, having solved the coordinated multipoint transmission in correlation technique exists resource utilization not high, and the fuzzy serious problem of path loss in power control, and then reached effective raising coordinated multipoint transmission resource utilization, alleviate to a certain extent power control path loss fuzzy, and guarantee the effect to rear line covering.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram based on CRS transmission while there is more UE in correlation technique under scenario 4 scenes;
Fig. 2 is according to the flow chart of the coordinated multipoint transmission processing method of the embodiment of the present invention;
Fig. 3 is according to the structured flowchart of the coordinated multipoint transmission treatment system of the embodiment of the present invention;
Fig. 4 is according to the structured flowchart of the coordinated multipoint transmission treatment system of the embodiment of the present invention;
Fig. 5 is according to the structured flowchart of the coordinated multipoint transmission treatment system of the embodiment of the present invention;
Fig. 6 carries out the schematic diagram one of rate-matched and data-mapping according to the macrocell of the embodiment of the present invention and low power nodes;
Fig. 7 carries out the schematic diagram two of rate-matched and data-mapping according to the macrocell of the embodiment of the present invention and low power nodes;
Fig. 8 is according to the schematic diagram of the coordinated multipoint transmission of the embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
A kind of coordinated multipoint transmission processing method is provided in the present embodiment, and Fig. 2 is according to the flow chart of the coordinated multipoint transmission processing method of the embodiment of the present invention, and as shown in Figure 2, this flow process comprises the steps:
Step S202, determine the send mode that sends public reference signal CRS to user equipment (UE), wherein, this send mode comprises: only the macrocell in heterogeneous network sends above-mentioned CRS, or, the common above-mentioned CRS of transmission of low power nodes by macrocell with the transmission CRS that is triggered;
Step S204, the above-mentioned send mode according to determining, carries out coordinated multipoint transmission processing.
Pass through above-mentioned steps, by only sending CRS by macrocell, or, by macrocell and the low power nodes of the transmission CRS that is triggered, jointly send CRS, the node all with respect to the coordinated multipoint transmission in correlation technique all participates in transmitting based on CRS, and exist some to transmit the less low power nodes of contribution based on CRS, adopt above-mentioned processing, low power nodes is carried out selectively for the transmission based on CRS, thereby the resource based on the less low power nodes of CRS transmission contribution can be saved for other, not only improved the utilance of system resource, and, alleviated to a certain extent power control path loss fuzzy, and guaranteed the covering to rear line.
In order to reduce between power node and low power nodes, and the interference between low power nodes and macrocell, determining after UE sends the send mode of public reference signal CRS, for user configures zero energy channel state information reference signals for measuring the interference of surrounding environment, for example: low power nodes configures interferometry resource IMR for user, in order to obtain the interference of low power nodes surrounding environment (macrocell or other low power nodes) to this low power nodes, wherein, this IMR is zero energy channel condition information-reference signal CSI-RS; And/or macrocell configures IMR for user, in order to obtain the interference of macrocell surrounding environment (low power nodes and adjacent cells) to macrocell, wherein, this IMR is zero energy CSI-RS.Adopt zero energy CSI-RS effectively to avoid interference and measure the interference that resource itself is brought.
It should be noted that, when definite low power nodes by macrocell and the transmission CRS that is triggered sends CRS jointly, can determine to be triggered by predetermined condition and send the low power nodes of CRS, wherein, this predetermined condition can comprise following one of at least: the channel quality information CQI of UE feedback, low power nodes are to the path loss information of UE, the positional information of UE.
In order to improve the reliability of transmission information, after definite low power nodes by macrocell and the transmission CRS that is triggered sends CRS jointly, macrocell can send by the mode of single frequency network SFN this CRS with the low power nodes of the transmission CRS that is triggered; And/or, according to definite send mode, carry out coordinated multipoint transmission processing and comprise: in the resource that the low power nodes of macrocell and the transmission CRS that is triggered is distributed to the UE based on CRS demodulation by the mode of SFN, send business datum.Be that CRS all can adopt the send mode of SFN to send with the business datum based in CRS Resources allocation, guarantee the reliability of transmission.
Equally, reliable for transmission information, when the transmission to some control informations, also can adopt the mode of SFN to send, for example,, in the following manner one of at least to UE transmitting system message and/or beep-page message: all low power nodes that covered by macrocell and macrocell in the mode of single frequency network SFN to UE transmitting system message and/or beep-page message; By macrocell and the low power nodes that trigger to send CRS in the mode of SFN to UE transmitting system message and/or beep-page message.
Again for example, in the following manner one of at least to UE transmitting channel control message, wherein, this channel control message comprise following one of at least: Physical Downlink Control Channel message, physics HARQ indicating channel message, control channel form channel massage, Physical Broadcast Channel message: only by macrocell transmitting channel control message; The all low power nodes that covered by macrocell and macrocell in the mode of single frequency network SFN to UE transmitting channel control message; By macrocell and the low power nodes that trigger to send CRS in the mode of SFN to UE transmitting channel control message.Above-mentioned each message is combined while sending, and can go out different send modes according to the principle combinations of predetermined set and send.
In addition, the interference of the downlink physical shared channel when macrocell sends CRS, low power nodes being sent, can adopt following processing: after definite low power nodes by macrocell and the transmission CRS that is triggered sends CRS jointly, the low power nodes that sends CRS of being triggered sends on the corresponding resource list RE of CRS not mapping (enum) data at macrocell, and/or, the identical data of RE that mapping closes on this RE on the corresponding resource list RE of macrocell transmission CRS.
Preferably, after definite low power nodes by macrocell and the transmission CRS that is triggered sends CRS jointly, when not needing this low power nodes to send CRS, or, when scene state changes, can trigger post and send closing of CRS, for example, this low power nodes can one of at least be closed sending CRS by following triggering mode: low power nodes triggers and closes sending CRS according to user type; Low power nodes is closed sending CRS according to the notification triggers of closing receiving from macrocell.Certainly, for system energy-conservation better, a certain scheduled duration (can determine as the case may be) can be set, while not receiving business datum to be transmitted or uplink scheduling request in this scheduled duration, low power nodes enters silent status, wherein, the low power nodes in silent status quit work (not sending all signals).
A kind of coordinated multipoint transmission treatment system is also provided in the present embodiment, and this system is used for realizing above-described embodiment and preferred implementation, has carried out repeating no more of explanation.As used below, the combination of software and/or the hardware of predetermined function can be realized in term " module ".Although the described device of following examples is preferably realized with software, hardware, or the realization of the combination of software and hardware also may and be conceived.
Fig. 3 is according to the structured flowchart of the coordinated multipoint transmission treatment system of the embodiment of the present invention, and as shown in Figure 3, this coordinated multipoint transmission treatment system 30 comprises determination module 32 and processing module 34, below this system is described.
Determination module 32, for determining the send mode that sends public reference signal CRS to user equipment (UE), wherein, this send mode comprises: only the macrocell in heterogeneous network sends CRS, or, by macrocell and the low power nodes of the transmission CRS that is triggered, jointly send CRS; Processing module 34, is connected to above-mentioned determination module 32, for according to definite send mode, carries out coordinated multipoint transmission processing.
Fig. 4 is according to the structured flowchart of the coordinated multipoint transmission treatment system of the embodiment of the present invention, as shown in Figure 4, this system is except comprising all modules shown in Fig. 3, also comprise the first configuration module 42 that is arranged in low power nodes and the second configuration module 44 that is positioned at macrocell, below above-mentioned two modules are described respectively.
The first configuration module 42, is arranged in low power nodes, is used to user to configure interferometry resource IMR, and in order to obtain the interference of low power nodes surrounding environment to low power nodes, wherein, this IMR is zero energy channel condition information-reference signal CSI-RS; And/or the second configuration module 44, is arranged in macrocell, is used to user to configure IMR, in order to obtain the interference of macrocell surrounding environment to macrocell, wherein, this IMR is zero energy CSI-RS.
Preferably, above-mentioned determination module, also sends the low power nodes of CRS for determining by predetermined condition to be triggered.
Fig. 5 is according to the structured flowchart of the coordinated multipoint transmission treatment system of the embodiment of the present invention, as shown in Figure 5, this device is except comprising all modules shown in Fig. 3, also comprise module 52 is set, be connected to above-mentioned processing module 34, for scheduled duration is set, while not receiving business datum to be transmitted or uplink scheduling request in scheduled duration, this low power nodes enters silent status, and wherein, the low power nodes in silent status quits work.
By above-described embodiment and preferred implementation, the cooperative transmission technology in a kind of wireless communication system heterogeneous network is provided, based on this technology, can greatly improve the resource utilization of system.
Multi-point cooperative transmission method in a kind of heterogeneous network is provided in the present embodiment, comprise: Macro for example periodically sends CRS(, continue to use LTE Release 8 modes, at non-multicast broadcast single frequency network (non-Multicast Broadcast Single Frequency Network, referred to as non-MBSFN subframe and multicast broadcast single frequency network (Multicast Broadcast Single Frequency Network, referred to as MBSFN) control domain of subframe sends), low power nodes does not send CRS or sends CRS by the mode triggering.Low power nodes is carried out rate-matched to CRS when data-mapping, and wherein, Macro adopts identical physical district ID with low power nodes.
In system message and/or paging message, send subframe, wherein, above-mentioned message adopts the mode of SFN to send by all nodes, or is sent by Macro and the low power nodes SFN that triggers transmission CRS.CRS is only sent by Macro in above-mentioned subframe, or CRS adopts SFN mode to send by Macro with the low power nodes that triggers transmission CRS in above-mentioned subframe.
Low power nodes configures zero energy channel condition information-reference signal (zero power CSI-RS) as interferometry resource (interference measurement resource for user, referred to as IMR), for the measurement to the interference of Macro PDSCH and peripheral cell.When Macro also transmits based on DMRS, Macro configures IMR for user, for the measurement that low power nodes and peripheral cell are disturbed.
When low power nodes sends CRS by the mode triggering, and when sending CRS, mode with Macro by SFN sends CRS, be in the resource of distributing of the UE based on CRS transmission simultaneously, and the mode with Macro by SFN is corresponding UE transmission downlink service data.And by Macro, do not triggered that CRS sends and by SFN, be the low power nodes of UE service, can send data for other UE based on DMRS transmission reusing resource.
More preferably, Pico being triggered to the trigger condition that adopts SFN to send the downlink business of CRS and corresponding UE according to Macro is: the CQI in the CSI information of UE feedback is lower than threshold value.
When low power nodes does not have business datum to send within preset time, automatically by state of activation, transfer silent status to, until again receive activation signal.For example, above-mentioned activation signal can be the activation signal being sent by Macro, can be also the node discovery signals being sent by UE; Wherein, when activation signal is sent by UE, activation signal is that sensitizing pulse or node are found activation signal sequence.
For low power nodes, at Macro, send on the corresponding RE of CRS, can not send any information, also can send the repeating signal of closing on the upper PDSCH information of RE.
After low power nodes and Macro disappear to the UE covering demand based on CRS transmission by SFN mode jointly, low power nodes is closed the transmission of CRS; Wherein, closing the triggering that CRS sends can be judged according to user type voluntarily by low power nodes, also can be sent and be closed message informing low power nodes and close CRS and send by Macro.
To Physical Downlink Control Channel, physical mixed HARQ (Hybrid Automatic Repeat Request, referred to as HARQ) indicating channel, control channel form channel, Physical Broadcast Channel, the send mode of above-mentioned channel information also can adopt various ways, for example: can independently be sent or by SFN mode, be sent or sent with the low power nodes of the transmission CRS that is triggered by Macro by Macro and low power nodes by Macro.In addition, to all nodes of synchronizing channel, also can adopt the mode of SFN to send.
When sending alone above-mentioned information by Macro, and system message and beep-page message be when sent alone by Macro, the transmission of CRS if low power nodes is not triggered, and low power nodes does not send any CRS; When sending alone above-mentioned channel information by Macro, and system message and beep-page message be when jointly sent by Macro and low power nodes SFN, in the subframe that low power nodes only sends at system message and beep-page message, sends CRS.
When sending above-mentioned channel information by Macro and low power nodes by SFN, and system message and beep-page message be when sent alone by Macro, the transmission of CRS if low power nodes is not triggered, and low power nodes only sends CRS at control domain; When sending above-mentioned channel information by Macro and low power nodes by SFN, and when system message and beep-page message are sent jointly by Macro and low power nodes SFN, low power nodes sends CRS in the subframe of system message and beep-page message transmission, in other subframes of system message and beep-page message transmission, only at control domain, send CRS.
By above-described embodiment and preferred implementation, guaranteeing on the basis of LTE scenario 4 beneficial effects, improved the reuse efficiency of resource in low power nodes, not only be conducive to the management of power control and the raising of path loss measurement accuracy, and, can guarantee the covering to rear line to a certain extent, in addition, also effectively avoid the tracking of UE time synchronized and Frequency Synchronization based on CRS transmission to follow the tracks of fuzzy problem.
Below in conjunction with the various objects that realize, the embodiment of the present invention and preferred implementation are described.
In order to improve the level of resources utilization of system, make low power nodes can reuse Macro(macrocell) community resource as much as possible, under normal mode of operation, public reference signal (CRS) only sends at Macro, and low power nodes is carried out resource mapping in Macro CRS transmitted signal position according to the rate-matched mode of LTE R10.Wherein, low power nodes can be, but not limited to Microcell (micro cell), picocell (pico cell), remote radio head (RRH), Home eNodeB (HeNB), community (small cell), via node (Relay), Femto cell (Femtocell).Wherein earlier version user (UE based on CRS transmission) refers to LTE R8, R9 user.Simultaneously frequent switching and the different low power nodes for fear of terminal configures with Macro the CRS interference problem that different districts ID causes, for Macro configures identical community ID with low power nodes.
In order to realize the UE(LTE release 8/release 9UE based on CRS transmission) covering, can trigger low power nodes and send CRS according to the mode identical with Macro, wherein, send CRS with Macro same way here and refer to that the sequence of CRS pattern and CRS is all identical with Macro.Meanwhile, according to the mode identical with Macro, the PDSCH data of the corresponding UE based on CRS transmission being carried out to resource mapping, is that the UE transmitting based on CRS sends CRS and PDSCH data thereby realize Macro with the mode of the low power nodes employing SFN being triggered.Wherein, triggering low power nodes is the triggering mode of the UE service based on CRS transmission, can be triggered by Macro, also can independently be triggered by Pico.
When low power nodes is not triggered while sending CRS signal, low power nodes is carried out the transmission of data based on DMRS for the user in its coverage, and the user of low power nodes service simultaneously, measures by CSI-RS.After being disappeared with the common demand covering of low power nodes by Macro as the UE to based on CRS transmission, low power nodes can be according to the judgement of traffic data type being closed voluntarily to the transmission of CRS, or by Macro, notified the transmission of closing CRS.
Pico is triggered to CRS to be sent and can the CQI information based on UE feedback judge; The CQI information of network side based on UE feedback is determined UE channel quality, when CQI value is during lower than a certain thresholding, network side further judges the path loss situation between UE and different Pico, wherein, the method for judgement path loss situation can be for below one of at least: according to the Reference Signal Received Power of UE feedback and/or Reference Signal Received Quality and the judgement of reference signal transmitted power, the UE upward signal power judgement that receives according to different Pico.Network side is that UE selects the Pico that one or more path losses are little, and triggers the transmission that Pico carries out CRS; Network side adopts the mode of SFN to send CRS by Macro and Pico, and is that UE sends downlink service data by the mode of SFN.Wherein, sending between business datum, network side also can be waited for the feedback result that UE feeds back next time, and according to feedback result, by Macro and Pico, adopts the mode of SFN to send CRS and downlink service data (for example, PDSCH).
To the identification of the positional information of UE, can measure feedback information by upper and lower signal or CSI-RS judges.Wherein, for the UE based on CRS transmission, by upward signal (be for example mainly, can be Physical Random Access Channel (Physical Random Access Channel, referred to as PRACH) signal, Physical Uplink Control Channel/Physical Uplink Shared Channel (physical uplink control channel/physical uplink shared channel, referred to as PUCCH/PUSCH) signal) measure the positional information of estimating UE.For R11 and R11+ user, can measure estimation by upward signal, also can based on CSI-RS, (for example measure feedack by UE, Reference Signal Received Power/Reference Signal Received Quality based on CSI-RS (Reference Signal Received Power/Reference Signal Received Quality of UE feedback, referred to as RSRP/RSRQ), the CSI based on CSI-RS).
Due under normal circumstances, only have Macro to send CRS, its send mode can be continued to use the mode of LTE Release 8, and the control domain in each non-MBSFN subframe and MBSFN subframe sends CRS.Therefore,, for the UE based on CRS transmission, the synchronous tracking of life period and Frequency Synchronization are not followed the tracks of fuzzy problem.And for the UE based on DMRS transmission, can enter link synchronization tracing based on CSI-RS, for example in the case of necessary (simultaneously, exist for UE and configured many cover CSI-RS resources), can configure by high-level signaling the corresponding relation of CSI-RS and DMRS, so that determine the synchronous reference of following the tracks of of DMRS.
For R10, R11 and R11+ user, determining of power control adjusted based on CSI-RS measurement result, for the UE based on CRS transmission, by CRS, measure, under this scene, under normal circumstances, sending node is all well-determined, therefore, can avoid uplink power control configuration fuzzy problem.
Fig. 6 carries out the schematic diagram one of rate-matched and data-mapping according to the macrocell of the embodiment of the present invention and low power nodes, as shown in Figure 6, the interference of PDSCH low power nodes being sent for fear of Macro CRS, low power nodes is when carrying out data-mapping, Macro is sent to the RE(Resource element of CRS) on, according to the identical mode of Macro, carry out the rate-matched (mode identical to CRS rate-matched while shining upon with LTE R8, at Macro, send on the RE position of CRS not mapping (enum) data, and when shining upon, skip this part RE).
Pico sends on the RE position of CRS at Macro, can not shine upon any data, or for the interference of assisting the PDSCH transmission of UE under the UE measurement low power nodes based on CRS transmission to bring, at Macro, send on the RE position of CRS, shine upon the repeating signal of its corresponding dataRE, Fig. 7 carries out the schematic diagram two of rate-matched and data-mapping according to the macrocell of the embodiment of the present invention and low power nodes, as shown in Figure 7, in LPN, on the RE of data-mapping rate matching, be mapped as the identical data of data RE that it closes on, wherein, X represents the upper data shining upon of the RE being adjacent.
To being used to the resource of the UE transmission based on CRS transmission, when low power nodes is not triggered for carrying out CRS and PDSCH SFN while sending, low power nodes can be reused this part resource for carrying out the transmission based on DMRS, wherein, based on DMRS, transmission refers to that serviced user carries out demodulation based on DMRS, carries out strategy based on CSI-RS simultaneously.Thereby the transmission means with respect to CoMP scenario 4 definition of R11 has improved the level of resources utilization.Fig. 8 is according to the schematic diagram of the coordinated multipoint transmission of the embodiment of the present invention, as shown in Figure 8, is noted as
resource by Macro, distributed the UE(CRS based transmission be used to based on CRS transmission) transmit, the low power nodes that is not triggered and sends for carrying out CRS and PDSCH SFN, can reuse this part resource for the transmission based on DMRS (DMRS based transmission),
with
the resource of mark all can be used for the transmission (as shown in the solid arrow in figure) based on DMRS, and really for the UE based on CRS transmission only by macrocell, and send CRS(as shown in the dotted arrow in figure with the community that this UE1 closes on the most).
In order to improve the reliability of system message, paging information, the UE that compatibility is transmitted based on CRS simultaneously, the subframe sending in above-mentioned message, preferred, above-mentioned information and the CRS mode by SFN in Macro and low power nodes sends.Primary synchronization channel and auxiliary synchronization channel and broadcast channel also adopt the mode of SFN to send simultaneously.Above-mentioned information also can only be sent by Macro, and now CRS also only has Macro to send.
To Physical Downlink Control Channel, Physical HARQ Indicator Channel, control channel form channel, Physical Broadcast Channel, is independently sent or by SFN mode, is sent or had Macro and the low power nodes of the transmission CRS that is triggered to send by Macro and low power nodes by Macro.The all node SFN of synchronizing channel mode is sent.When sending alone above-mentioned information by Macro, and system message and beep-page message be when sent alone by Macro, the transmission of CRS if low power nodes is not triggered, and low power nodes does not send any CRS; When sending alone above-mentioned channel information by Macro, and system message and beep-page message be when jointly sent by Macro and low power nodes SFN, in the subframe that low power nodes only sends at system message and beep-page message, sends CRS.When sending above-mentioned channel information by Macro and low power nodes by SFN, and system message and beep-page message be when sent alone by Macro, the transmission of CRS if low power nodes is not triggered, and low power nodes only sends CRS at control domain; When sending above-mentioned channel information by Macro and low power nodes by SFN, and when system message and beep-page message are sent jointly by Macro and low power nodes SFN, low power nodes sends CRS in the subframe of system message and circulation message transmission, in other subframes of system message and circulation message transmission, only at control domain, send CRS.
In order to reduce low power nodes and Macro, and the interference between low power nodes, for the user based on DMRS transmission configures zero energy CSI-RS, as interferometry resource (interference measurement resource, referred to as IMR), wherein, low power nodes configuration IMR measures the interference of Macro PDSCH and the interference of adjacent cells for terminal; Macro, when transmitting based on DMRS, can configure zero energy CSI-RS equally, measures the interference of low power nodes and adjacent cells for terminal.
For realizing the energy-conservation of system, can when not having business datum to send when low power nodes, automatically by state of activation, transfer silent status to, until again receive activation signal within preset time.Wherein, activation signal can be the activation signal being sent by Macro, can be also the node discovery signals being sent by UE; Wherein, when activation signal is sent by UE, activation signal is that sensitizing pulse or node are found activation signal sequence.
By above-described embodiment and preferred implementation, cooperative transmission technology based in heterogeneous network in a kind of wireless communication system is provided, based on this technology, can have greatly improved the resource utilization of existing system, in addition, can also alleviate in existing system power control in the fuzzy problem of path loss.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (14)
1. a coordinated multipoint transmission processing method, is characterized in that, comprising:
Determine the send mode that sends public reference signal CRS to user equipment (UE), wherein, described send mode comprises:
Only the macrocell in heterogeneous network sends described CRS, or, the common described CRS of transmission of low power nodes by described macrocell with the transmission CRS that is triggered;
Described send mode according to determining, carries out coordinated multipoint transmission processing.
2. method according to claim 1, is characterized in that, is determining after described UE sends the send mode of public reference signal CRS, also comprises:
Described low power nodes configures interferometry resource IMR for user, and in order to obtain the interference of described low power nodes surrounding environment to described low power nodes, wherein, described IMR is zero energy channel condition information-reference signal CSI-RS; And/or,
Described macrocell configures IMR for user, and in order to obtain the interference of described macrocell surrounding environment to described macrocell, wherein, described IMR is zero energy CSI-RS.
3. method according to claim 1, is characterized in that, after the common described CRS of transmission of low power nodes determining by described macrocell and the transmission CRS that is triggered, also comprises:
Described macrocell with described in the low power nodes that the sends CRS mode by single frequency network SFN that is triggered send described CRS; And/or,
According to the described send mode of determining, carry out coordinated multipoint transmission and process and comprise: described macrocell with described in be triggered to send in the resource that the low power nodes of CRS distributes to the UE based on CRS demodulation by the mode of SFN and send business datum.
4. method according to claim 1, is characterized in that, determines by described macrocell and comprises with the common described CRS of transmission of low power nodes of the transmission CRS that is triggered: described in determining by predetermined condition, be triggered and send the low power nodes of CRS.
5. method according to claim 4, is characterized in that, described predetermined condition comprise following one of at least:
The channel quality information CQI of UE feedback, low power nodes are to the path loss information of UE, the positional information of UE.
6. method according to claim 1, is characterized in that, after the common described CRS of transmission of low power nodes determining by described macrocell and the transmission CRS that is triggered, also comprises:
The described low power nodes that sends CRS of being triggered sends on the corresponding resource list RE of described CRS not mapping (enum) data at described macrocell, and/or, at described macrocell, send the identical data of RE that on the corresponding resource list RE of described CRS, mapping closes on described RE.
7. method according to claim 1, is characterized in that, also comprises:
Scheduled duration is set, and while not receiving business datum to be transmitted or uplink scheduling request in described scheduled duration, described low power nodes enters silent status, and wherein, the described low power nodes in silent status quits work.
8. method according to claim 1, it is characterized in that, determine by described macrocell be triggered and send the common described CRS of transmission of low power nodes of CRS after, also comprise that described low power nodes one of at least closes sending CRS by following triggering mode:
Described low power nodes triggers and closes sending CRS according to user type; Described low power nodes is closed sending CRS according to the notification triggers of closing receiving from described macrocell.
9. method according to claim 1, is characterized in that, is determining after described UE sends the send mode of public reference signal CRS, also comprises: in the following manner one of at least to described UE transmitting system message and/or beep-page message:
The all low power nodes that covered by described macrocell and described macrocell send described system message and/or beep-page message in the mode of single frequency network SFN to described UE;
By described macrocell and the low power nodes that trigger to send CRS, in the mode of described SFN, to described UE, send described system message and/or beep-page message.
10. method according to claim 1, it is characterized in that, determining after described UE sends the send mode of public reference signal CRS, also comprise: in the following manner one of at least to described UE transmitting channel control message, wherein, described channel control message comprise following one of at least: Physical Downlink Control Channel message, physics HARQ indicating channel message, control channel form channel massage, Physical Broadcast Channel message:
Only by macrocell, send described channel control message;
The all low power nodes that covered by described macrocell and described macrocell send described channel control message in the mode of single frequency network SFN to described UE;
By described macrocell and the low power nodes that trigger to send CRS, in the mode of described SFN, to described UE, send described channel control message.
11. 1 kinds of coordinated multipoint transmission treatment systems, is characterized in that, comprising:
Determination module, for determining the send mode that sends public reference signal CRS to user equipment (UE), wherein, described send mode comprises: only the macrocell in heterogeneous network sends described CRS, or, the common described CRS of transmission of low power nodes by described macrocell with the transmission CRS that is triggered;
Processing module, for according to the described send mode of determining, carries out coordinated multipoint transmission processing.
12. systems according to claim 11, is characterized in that, also comprise:
The first configuration module, be arranged in described low power nodes, be used to user to configure interferometry resource IMR, in order to obtain the interference of described low power nodes surrounding environment to described low power nodes, wherein, described IMR is zero energy channel condition information-reference signal CSI-RS; And/or,
The second configuration module, is arranged in described macrocell, is used to user to configure IMR, and in order to obtain the interference of described macrocell surrounding environment to described macrocell, wherein, described IMR is zero energy CSI-RS.
13. systems according to claim 11, is characterized in that,
Described determination module, sends the low power nodes of CRS for being triggered described in determining by predetermined condition.
14. systems according to claim 11, is characterized in that, also comprise:
Module is set, and for scheduled duration is set, while not receiving business datum to be transmitted or uplink scheduling request in described scheduled duration, described low power nodes enters silent status, and wherein, the described low power nodes in silent status quits work.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016049815A1 (en) * | 2014-09-29 | 2016-04-07 | 华为技术有限公司 | Wireless communication method, related device and system |
| WO2018082049A1 (en) * | 2016-11-04 | 2018-05-11 | 富士通株式会社 | Low frequency network-assisted synchronisation and access method, apparatus, and system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101534285A (en) * | 2009-04-09 | 2009-09-16 | 中兴通讯股份有限公司 | A sending method for reference signals |
| US20110038330A1 (en) * | 2009-07-30 | 2011-02-17 | Qualcomm Incorporated | ROBUST DECODING OF CoMP TRANSMISSIONS |
| US20110268077A1 (en) * | 2009-01-12 | 2011-11-03 | Lei Wan | Downlink transmission method in a coordinated multi-point transmission system, network device, and wireless system |
| CN102264105A (en) * | 2010-05-24 | 2011-11-30 | 中兴通讯股份有限公司 | Multipoint coordinated transmission method and apparatus thereof |
| CN102547872A (en) * | 2012-01-18 | 2012-07-04 | 电信科学技术研究院 | Method and device for transmitting bandwidth information |
| US20120201164A1 (en) * | 2011-02-09 | 2012-08-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Distribution Of Cell-Common Downlink Signals In A Hierarchical Heterogeneous Cell Deployment |
| WO2012112577A1 (en) * | 2011-02-14 | 2012-08-23 | Qualcomm Incorporated | Power control and user multiplexing for heterogeneous network coordinated multipoint operations |
-
2012
- 2012-09-14 CN CN201210341408.6A patent/CN103684558B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110268077A1 (en) * | 2009-01-12 | 2011-11-03 | Lei Wan | Downlink transmission method in a coordinated multi-point transmission system, network device, and wireless system |
| CN101534285A (en) * | 2009-04-09 | 2009-09-16 | 中兴通讯股份有限公司 | A sending method for reference signals |
| US20110038330A1 (en) * | 2009-07-30 | 2011-02-17 | Qualcomm Incorporated | ROBUST DECODING OF CoMP TRANSMISSIONS |
| CN102264105A (en) * | 2010-05-24 | 2011-11-30 | 中兴通讯股份有限公司 | Multipoint coordinated transmission method and apparatus thereof |
| US20120201164A1 (en) * | 2011-02-09 | 2012-08-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Distribution Of Cell-Common Downlink Signals In A Hierarchical Heterogeneous Cell Deployment |
| WO2012112577A1 (en) * | 2011-02-14 | 2012-08-23 | Qualcomm Incorporated | Power control and user multiplexing for heterogeneous network coordinated multipoint operations |
| CN102547872A (en) * | 2012-01-18 | 2012-07-04 | 电信科学技术研究院 | Method and device for transmitting bandwidth information |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016049815A1 (en) * | 2014-09-29 | 2016-04-07 | 华为技术有限公司 | Wireless communication method, related device and system |
| WO2018082049A1 (en) * | 2016-11-04 | 2018-05-11 | 富士通株式会社 | Low frequency network-assisted synchronisation and access method, apparatus, and system |
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