CN103139913B - A kind of method of collocating uplink sounding reference signal and LTE heterogeneous network - Google Patents
A kind of method of collocating uplink sounding reference signal and LTE heterogeneous network Download PDFInfo
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Abstract
The present invention proposes a kind of method and LTE heterogeneous network of collocating uplink sounding reference signal.Macrocell base stations in LTE heterogeneous network and the small power transmission node in the area of coverage form isomery cell cluster, multiple CoMP cell composition CoMP collaboration sets in isomery cell cluster are that same user terminal performs coordinated multipoint transmission, the cell-level SRS resource of CoMP cell and the user class SRS resource of CoMP UE by bunch in macrocell base stations unifiedly to configure, realize the CoMP UE in the set of cooperation cell and CoMP UE, CoMP UE and non-CoMP UE, non-CoMP UE are orthogonal with non-CoMP UE's.The present invention improves the SINR of user SRS, reduces each community negotiation SRS resource and distributes the interaction data amount brought.
Description
Technical field
The present invention relates to moving communicating field, in particular to a kind of for the uplink detection reference signal collocation method of LTE isomery networking CoMP and the LTE heterogeneous network of collocating uplink sounding reference signal, the LTE heterogeneous network problem that the uplink detection reference signal that occurs disturbs mutually when performing CoMP can be solved.
Background technology
The networking of LTE isomery typically refers to a kind of networking mode adopting macrocellular (Macro eNB) and small power transmission equipment (LPN:Low Power Node, as microcellulor, Pico, RRH etc.) to carry out mixed deployment in the lte networks.LTE heterogeneous network forms overlapping covering by disposing several small power transmission equipment in macro cell coverage region, for solving weak covering in macro cell coverage region and capacity limitation problem.See Fig. 1.
In LTE system, uplink reference signals is mainly used in correlation demodulation, the measurement of up channel, power control, the estimation of timing and wave beam forming arrival direction.In order to realize above-mentioned functions, LTE physical layer defines two kinds of uplink reference signals, comprises demodulated reference signal DMRS and detection reference signal SRS.Demodulated reference signal DMRS is mainly used in the correlation demodulation of data, and detection reference signal SRS refers to the reference signal of terminal at the subscriber channel state measurement of up transmission, the state of up channel is measured in base station by receiving SRS signal, relevant information is used for the adaptive scheduling to transmitting uplink data.In the tdd case, due to the symmetry of same frequency range up-downgoing channel, by can also obtain the information of downlink channel condition to the measurement of uplink detection reference signal, for auxiliary downlink transfer.
LTE isomery network construction characteristic determines the signal transmission that the terminal resided in LPN (the micro-station of low-power) community receives Macro eNB (macrocell base stations) and LPN simultaneously, provisional capital up and down due to LTE system adopts the orthogonal multi-access mode based on OFDM, there is comparatively serious interference in minizone, particularly under isomery networking mode Macro eNB and LPN overlay area overlapped, if Macro eNB and LPN is with frequently and adopt different cell ID, no matter terminal will be caused to reside in eNB community or LPN community, the severe jamming of the other side community all can be subject to.Therefore, in order to meet the requirement of LTE networking performance, 3GPP proposes and adopts coordinated multipoint transmission CoMP to solve isomery networking interference problem in the upgrade-system (LTE-Advanced) of its mobile cellular communication system-Long Term Evolution project of future generation.
Coordinated multipoint transmission CoMP technology refers to multiple transfer points that geographical position is separated, the collaborative transfer of data participating in same terminal, for convenience of statement, below by adopting the subscriber equipment of coordinated multipoint transmission technology to be called CoMP UE, the subscriber equipment of coordinated multipoint transmission technology is not adopted to be called non-CoMP UE; The community of coordinated multipoint transmission technology is adopted to be called CoMP cell, the community that in CoMP cell, CoMP UE is resident is called persistent district, in CoMP cell, other provide the community of cooperation transmission to be called cooperation cell for CoMP UE, and the set of COMP community is called CoMP collaboration set.
CoMP technical requirement system effectively can obtain the channel condition information of CoMP UE, and the ascending channel detecting reference signal that CoMP UE sends help system can estimate uplink channel information, particularly in TDD system, the reciprocity of up-downgoing channel can also be utilized to obtain the descending channel information of system to CoMP UE.Therefore, the uplink detection reference signal quality good or not of CoMP UE has considerable influence for CoMP effect.
CoMP technology mainly comprises Combined Treatment and collaborative figuration.Combined Treatment technology refers at downlink transmission direction, be that all CoMP cell that a CoMP UE serves all preserve the packet sent to this UE, system is different from business demand according to scheduling result, selects cell portion wherein or all communities to send data to this UE.Collaborative figuration technology refers to the beam direction being sent signal between CoMP cell by coordination, is avoided by wave beam larger for interference ratio, reaches the object reducing minizone and mutually disturb.
No matter be the collaborative wave beam forming in CoMP or Combined Treatment, the feedback of channel condition information is the key of CoMP application.LTE-A defines three kinds of feedback mechanisms that CoMP may adopt, and comprises dominant feedback, explicit feedback and the feedback of channel information based on SRS.
Channel feedback mechanism wherein based on SRS is maximum by uplink detection reference signal quality influence.Feedback of channel information based on SRS refers to that terminal sends uplink detection reference signal SRS, the SRS that multiple base stations (transfer point) of CoMP participating send according to terminal, estimate the uplink channel information of terminal to base station, and utilize uplink channel information to estimate downlink channel condition, thus multiple base station (transfer point) has worked in coordination with the operations such as pre-coding matrix, MCS selection and frequency domain dispatching.
In current LTE system, the sequence that main definitions uplink detection reference signal SRS uses and the mapping at time-frequency domain.
Uplink detection reference signal SRS uses the sequence with permanent envelope zero auto-correlation (ConstantAmplitude Zero Auto-Correlation, CAZAC) characteristic.Length is
the mathematic(al) representation of sequence be:
Wherein
be basic sequence, jointly determined by the basic sequence group # " v " in the numbering " u " of basic sequence group and group, α is the cyclic shift to basic sequence, and the different cyclic shifts of same base sequence form different reference signal sequences.Length is more than or equal to the reference signal sequence of 36, the Zadoff-Chu sequence that length is prime number is used to generate basic sequence, length is less than to the reference signal sequence of 36, uses the method for computer search to obtain auto-correlation optimum sequence relative to their cross correlation.
Uplink detection reference signal sends in last OFDM symbol of subframe.Allocating cell class survey reference signal period of sub-frame T is taked in each community
sFCand offset Δ
sFC, define in community the subframe time position that can be used for sending uplink detection reference signal.As, suppose to configure T
sFC=5, Δ
sFC={ 0,1}, then the time location of community detection reference signal subframe is as shown in Figure 2.
On the basis of the cell-level SRS position of definition community, sent the user class period of sub-frame T of SRS by configure user
sRSwith side-play amount T
offset, further define certain user in community and send the subframe position of uplink SRS.As, on the basis of above-mentioned community SRS configuration, configure the T of certain user
sRS=0, T
offset=1, the time location of the uplink detection reference signal of this user can be obtained as shown in Figure 3.
In LTE system, in units of the distribution Shi Yi community of uplink detection reference signal SRS resource.The SRS basic sequence number of each community obtains according to cell ID (Cell ID), and the basic sequence number of the SRS of different districts may be different.And the SRS of neighbor cell sends the cycle is configured voluntarily by this community, when the SRS of neighbor cell be configured in transmit in identical subframe time because the SRS basic sequence of neighbor cell is different, the SRS in neighbor cell can interference mutually.
Because the uplink detection reference signal SRS of current LTE is not optimized design for isomery networking CoMP, namely in isomery networking, the Resourse Distribute of the uplink detection reference signal SRS of CoMP cell is still decided in its sole discretion by each community, therefore when the SRS distributed when different CoMP cell is configured in frequency domain position transmission in identical subframe and identical, serious interference will be brought each other, have impact on the accuracy of uplink channel estimation, reduce the performance gain of CoMP.
Citing, terminal a is resided in LPN community and is transmitted by eNB community and LPN cell cooperative.The channel of the uplink detection reference signal SRS that terminal a sends in detection LPN community simultaneously, also needs the channel detecting eNB community.If the uplink detection reference signal SRS allocation plan taking LTE current, eNB community will be subject to the severe jamming of terminal b when the SRS of receiving terminal a.Being on the one hand because the SRS burst that sends of terminal a and b is non-orthogonal, is because the signal of terminal b that eNB community receives often is greater than the signal of terminal a on the other hand.The performance causing system to channel estimating declines by strongly disturbing existence greatly, affects isomery networking CoMP implementation result.As shown in Figure 4.
Summary of the invention
In view of more than, the present invention proposes a kind of method and LTE heterogeneous network of collocating uplink sounding reference signal.
The method of a kind of collocating uplink sounding reference signal that the present invention proposes, comprises the following steps:
Macrocell base stations in LTE heterogeneous network and the small power transmission node in the area of coverage are formed isomery cell cluster, the cell-level uplink detection reference signal (SRS) of CoMP collaboration set in the unified configuration of macrocell base stations bunch in bunch, the each community of CoMP collaboration set in the cell-level SRS of CoMP cell configuration being sent to bunch, comprises persistent district and cooperation cell;
The SRS of macrocell base stations unified configuration CoMP UE in bunch, the SRS that in SRS and the CoMP collaboration set of described COMP UE, other obtain the UE of configuration is orthogonal, the each community of CoMP collaboration set in the SRS resource of described CoMP UE being sent to bunch, comprises persistent district and cooperation cell;
The each community of CoMP collaboration set is configured according to the cell-level SRS configuration received;
The CoMP UE SRS resource received configuration is sent to described CoMP UE by high-level signaling by the persistent district of described CoMP UE, the persistent district of described CoMP UE configures the SRS resource of the non-CoMP UE in this community voluntarily, and the SRS that all UE obtaining configuration in this community comprise described CoMP UE is mutually orthogonal;
The cooperation cell of described CoMP UE configures the SRS resource of the non-CoMP UE in this community voluntarily, and the SRS of the UE of this community all acquisitions configuration is mutually orthogonal, and mutually orthogonal with the SRS of described CoMP UE.
The LTE heterogeneous network of a kind of collocating uplink sounding reference signal that the present invention proposes, the macrocell base stations in LTE heterogeneous network and the small power transmission node in the area of coverage form isomery cell cluster, and described LTE heterogeneous network comprises:
Base station, the cell-level uplink detection reference signal (SRS) of CoMP collaboration set in unified configuration bunch, the SRS configuration of unified configuration CoMP UE; The each community of CoMP collaboration set in being sent to by the SRS of the cell-level SRS of CoMP cell and CoMP UE bunch, comprises persistent district and cooperation cell, and the SRS that in SRS and the CoMP collaboration set of described COMP UE, other obtain the UE of configuration is orthogonal;
CoMP UE persistent district, cell-level SRS configuration according to receiving is configured, the CoMP UE SRS resource received configuration is sent to described CoMPUE by high-level signaling, described CoMP UE persistent district configures the SRS resource of the non-CoMP UE in this community voluntarily, and the SRS that all UE obtaining configuration in this community comprise described CoMP UE is mutually orthogonal;
CoMP UE cooperation cell, the cell-level SRS configuration according to receiving is configured, and configures the SRS resource of the non-CoMP UE in this community voluntarily, and the SRS of the UE of this community all acquisitions configuration is mutually orthogonal, and mutually orthogonal with the SRS of described CoMP UE.
The present invention, by carrying out the unified configuration of uplink detection reference signal to the CoMP cell in LTE heterogeneous network, reduces the uplink detection reference signal interference between LTE heterogeneous network small area, improves the accuracy of channel estimating.Interaction data amount between all right community saving CoMP generation further of the present invention, guarantees the performance gain that coordinated multipoint transmission CoMP brings.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 illustrates prior art LTE isomery network construction form.
Fig. 2 is the SRS time location that prior art community is shown.
Fig. 3 is the SRS time location that prior art user is shown.
Fig. 4 illustrates that the SRS of prior art LTE isomery networking disturbs example.
Fig. 5 illustrates that in the embodiment of the present invention, LTE isomery networking SRS configures and transfer process schematic diagram.
Fig. 6 is the SRS collocation method that LTE isomery of the present invention networking is shown.
Embodiment
Mutually disturb for each transfer point uplink detection reference signal SRS existed in LTE isomery networking COMP and affect the problem of minizone channel estimation quality, the present invention proposes a kind of for the uplink detection reference signal collocation method of LTE isomery networking CoMP and the LTE heterogeneous network of collocating uplink sounding reference signal.
The present invention proposes a kind of LTE heterogeneous network of collocating uplink sounding reference signal, and as shown in Figure 1, the macrocell base stations in LTE heterogeneous network and the small power transmission node in the area of coverage form isomery cell cluster to its networking structure, and described LTE heterogeneous network comprises:
Base station, the cell-level uplink detection reference signal (SRS) of CoMP collaboration set in unified configuration bunch, the SRS configuration of unified configuration CoMP UE; The each community of CoMP collaboration set in being sent to by the SRS of the cell-level SRS of CoMP cell and CoMP UE bunch, comprises persistent district and cooperation cell, and the SRS that in SRS and the CoMP collaboration set of described COMP UE, other obtain the UE of configuration is orthogonal;
CoMP UE persistent district, cell-level SRS configuration according to receiving is configured, the CoMP UE SRS resource received configuration is sent to described CoMPUE by high-level signaling, described CoMP UE persistent district configures the SRS resource of the non-CoMP UE in this community voluntarily, and the SRS that all UE obtaining configuration in this community comprise described CoMP UE is mutually orthogonal;
CoMP UE cooperation cell, the cell-level SRS configuration according to receiving is configured, and configures the SRS resource of the non-CoMP UE in this community voluntarily, and the SRS of the UE of this community all acquisitions configuration is mutually orthogonal, and mutually orthogonal with the SRS of described CoMP UE.
The present invention can adopt arbitrary orthogonal manner of prior art, realizes mutually orthogonal.The orthogonal manner of prior art is such as:
Frequency domain, is that is placed on different carrier waves by the reference signal of different user;
Time domain, is namely placed on different subframe (or on the different sign bit of same subframe) by the reference signal of different user.
In order to clearly illustrate the LTE heterogeneous network of collocating uplink sounding reference signal of the present invention and method, be described in detail respectively below in conjunction with Fig. 5 and Fig. 6.
Fig. 6 illustrates a kind of uplink detection reference signal SRS collocation method for LTE isomery networking CoMP provided by the invention.The method comprises the following steps:
Macrocell base stations eNB community in step 601, LTE heterogeneous network and the small power transmission node LPN community in its area of coverage form isomery cell cluster.The cell-level SRS resource of the CoMP cell in isomery cell cluster is by the unified configuration of macrocell base stations eNB.
The cell-level SRS resource of described CoMP cell comprises: CoMP cell SRS basic sequence number, CoMP cell special uplink detection reference signal SRS cycle T
sFCwith CoMP cell special uplink detection reference signal SRS transmission bias Δ
sFC, the user uplink detection reference signal SRS cycle T of CoMP cell
sRSt is biased with user uplink detection reference signal SRS transmission
offset.Especially, base station is by CoMP cell user SRS cycle T
sRSbe divided into multiple user class SRS and gather U
i(i=1,2 ...), and be biased T by SRS transmission
offsetuser class SRS set is subdivided into CoMP user SRS subset
with non-CoMP user SRS subset
The method that set divides is a lot, and principle is divided into CoMP user SRS subset () and non-CoMP user SRS subset () exactly.
The each community of CoMP collaboration set in step 602, eNB every secondary response CoMP ask or periodically the cell-level SRS of CoMP cell configuration sent to bunch, comprises persistent district and cooperation cell.
The SRS resource of the CoMP UE in step 603, isomery cell cluster is by the unified configuration of macrocell base stations eNB.The SRS that in SRS and the CoMP collaboration set of described CoMP UE, other obtain the UE of configuration is orthogonal.
Described SRS resource comprises: the cyclic shift of SRS basic sequence, SRS bandwidth, SRS frequency domain original position, SRS frequency hopping bandwidth and SRS user's SRS cycle T
sRSt is biased with SRS transmission
offset.Wherein SRS configures period of sub-frame T
sRSt is biased with SRS transmission
offsetbelong to CoMP user SRS set and CoMP user SRS subset respectively
The each community of CoMP collaboration set in the SRS resource of described CoMP UE sends to when every secondary response CoMP asks bunch by step 604, eNB, comprises persistent district and cooperation cell.
Step 605, bunch in each community of CoMP collaboration set according to the cell-level SRS configuration received, the SRS basic sequence number of this community, the proprietary SRS cycle T of CoMP cell are set
sFC, the proprietary SRS transmission bias Δ of CoMP cell
sFC, CoMP user level SRS gathers U
i, make with bunch in other CoMP cell consistent.
In the persistent district of step 606, described CoMP UE, the CoMP UESRS resource distribution received is sent to described CoMP UE by high-level signaling.The persistent district of described CoMP UE configures the SRS resource of the non-CoMP UE in this community voluntarily, can adopt the collocation method of prior art.User's SRS cycle T of the non-CoMP UE in this community
sRSt is biased with user's SRS transmission
offsetthe non-CoMP user SRS subset that in belonging to bunch, eNB issues
the SRS that all UE obtaining configuration in this community comprise described CoMP UE is mutually orthogonal.
Configure the SRS resource of the non-CoMPUE in this community voluntarily in the cooperation cell of step 607, described CoMP UE, the collocation method of prior art can be adopted, user's SRS cycle T of the non-CoMP UE in this community
sRSt is biased with user's SRS transmission
offsetbelong to the non-CoMP user SRS subset that Macro eNB issues
the SRS of the UE of this community all acquisitions configuration is mutually orthogonal, and mutually orthogonal with the SRS of described CoMP UE.
The execution sequence of above-mentioned steps 606 and step 607 in no particular order.
Uplink detection reference signal SRS is sent according to the SRS configuration each CoMP cell in CoMP collaboration set obtained in step 608, described CoMP UE.
The SRS of described CoMP terminal is received in step 609, CoMP cell.
The SRS resource of the non-CoMP cell in step 610, isomery cell cluster is configured voluntarily by this community, can adopt the collocation method of prior art.
ENB in step 611, isomery cell cluster configures according to the CoMP cell SRS of this bunch of CoMP cell and this bunch of UE scale Dynamic Maintenance, selects suitable user class SRS to gather according to CoMP cell quantity and UE quantity.
Further, CoMP user SRS subset in isomery cell cluster and non-CoMP user SRS subset can take static configuration, also can be adjusted the size of corresponding CoMP user SRS subset and non-CoMP user SRS subset according to CoMP cell quantity and UE Number dynamics by eNB.
The present invention is directed to the problem of the mutual serious interference of terminal SRS in the CoMP cell that occurs in the networking of current LTE isomery, propose one and form isomery cell cluster by macrocell base stations (Macro eNB) and small-power node (LPN), the method of unified configuration CoMP cell uplink detection reference signal SRS in bunch, the method by by bunch in the unified configuration of eNB and the SRS resource of distributing CoMP cell, realize user SRS in CoMP cell mutually orthogonal, reduce the mutual interference of CoMP user SRS.Present invention achieves CoMP user especially and non-CoMP user SRS diversity configures, the interaction data amount coordinating the distribution of CoMP user SRS resource between CoMP cell can be reduced, alleviate the bottleneck that CoMP technology requires X2 interface big data quantity transmission bandwidth, ensure that CoMP performance gain.
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.
The core technical features of the present invention program: the macrocell base stations in LTE heterogeneous network and the small power transmission node in the area of coverage form isomery cell cluster, multiple CoMP cell composition CoMP collaboration sets in isomery cell cluster are that same user terminal performs coordinated multipoint transmission, the cell-level SRS resource of CoMP cell and the user class SRS resource of CoMP UE by bunch in macrocell base stations unifiedly to configure, the SRS of CoMP UE and non-CoMP UE configures and adopts diversity collocation strategy, reduce the SRS interference between user terminal, namely the present invention realize cooperation cell set in CoMP UE and CoMP UE, CoMP UE and non-CoMP UE, non-CoMP UE is orthogonal with non-CoMP UE's, improve the SINR of user SRS, reduce each community negotiation SRS resource and distribute the interaction data amount brought, obtain better cooperative transmission effect.
Fig. 5 illustrates that in the embodiment of the present invention, LTE isomery networking SRS configures and transfer process schematic diagram, comprises the steps:
(1), when LTE system carries out isomery networking, the small power transmission node LPN in the macrocell base stations eNB in network and the macrocell base stations area of coverage is formed isomery cell cluster.Safeguard that the community of this cell cluster forms information and notifies Cu Neige community by eNB.
(2) the cell-level SRS resource of the CoMP cell in isomery cell cluster is by the unified configuration of macrocell base stations eNB.The cell-level SRS resource of described CoMP cell comprises: CoMP cell SRS basic sequence number, CoMP cell special uplink detection reference signal SRS cycle T
sFCwith CoMP cell special uplink detection reference signal SRS transmission bias Δ
sFC, the user uplink detection reference signal SRS cycle T of CoMP cell
sRSt is biased with user uplink detection reference signal SRS transmission
offset.Especially, system is by CoMP cell user SRS cycle T
sRSbe divided into multiple user class SRS and gather U
i(i=1,2 ...), and be biased T by SRS transmission
offsetuser class SRS set is subdivided into CoMP user SRS subset
with non-CoMP user SRS subset
According to step (2), present embodiments provide uplink detection reference signal allocation plan in a kind of bunch.The program comprises:
Bunch (2.1) in, the SRS basic sequence of CoMP cell generates according to the CellID of the eNB of described bunch, is prior art.
Bunch (2.2) in, the SRS of COMP community sends the time offset of cycle and permission, comprises configuration cycle T
sFCwith SRS transmission bias Δ
sFC, by the unified configuration of the eNB of described bunch.A cell-level SRS cycle can reference table 1 with transmission bias configuration use-case.
Table 1 isomery CoMP cell level SRS cycle and transmission bias configuration scheme
Bunch (2.3) in, the uplink detection reference signal of the CoMP user of CoMP cell sends the time offset of cycle and permission, comprises SRS configuration cycle T
sRSt is biased with SRS transmission
offset, by the unified configuration of the eNB of described bunch.System is by each community user SRS cycle T
sRSbe divided into multiple user class SRS and gather U
i(i=1,2 ...), and be biased T by SRS transmission
offsetuser class SRS set is subdivided into CoMP user SRS subset
with non-CoMP user SRS subset
coMP user SRS subset in isomery cell cluster and non-CoMP user SRS subset can take static configuration, and a user class SRS set configuration use-case can reference table 2.Also can be adjusted the size of corresponding CoMP user SRS subset and non-CoMP user SRS subset according to CoMP cell quantity and UE Number dynamics by eNB.
Table 2 isomery CoMP cell user class SRS static configuration scheme
(3) after CoMP collaboration set is determined in the persistent district of CoMP UE, to bunch in eNB send CoMP request.
(4) eNB responds CoMP request, configures the SRS resource of described CoMP UE, and the SRS that in SRS and the CoMP collaboration set of described COMP UE, other obtain the UE of configuration is orthogonal.Described SRS resource comprises: the cyclic shift of SRS basic sequence, SRS bandwidth, SRS frequency domain original position, SRS frequency hopping bandwidth and SRS user's SRS cycle T
sRSt is biased with SRS transmission
offset.Wherein SRS configures period of sub-frame T
sRSt is biased with SRS transmission
offsetbelong to CoMP user SRS set and CoMP user SRS subset respectively
(5) eNB the cell-level SRS of CoMP cell is configured and the SRS resource of described CoMP UE to send to bunch in each community of CoMP collaboration set, comprise persistent district and cooperation cell.
Bunch (6) in, each community of CoMP collaboration set is according to the cell-level SRS configuration received, and arranges the SRS basic sequence number of this community, the proprietary SRS cycle T of CoMP cell
sFC, the proprietary SRS transmission bias Δ of CoMP cell
sFC, CoMP user level SRS gathers U
i, make with bunch in other CoMP cell consistent.
(7) the CoMP UE SRS resource received configuration is sent to described CoMP UE by high-level signaling by the persistent district of described CoMP UE.The persistent district of described CoMP UE configures the SRS resource of the non-CoMP UE in this community voluntarily.User's SRS cycle T of the non-CoMP UE in this community
sRSt is biased with user's SRS transmission
offsetthe non-CoMP user SRS subset that in belonging to bunch, eNB issues
the SRS of the UE of this community all acquisitions configuration is mutually orthogonal.
(8) cooperation cell of described CoMP UE configures the SRS resource of the non-CoMP UE in this community voluntarily, user's SRS cycle T of the non-CoMP UE in this community
sRSt is biased with user's SRS transmission
offsetbelong to the non-CoMP user SRS subset that Macro eNB issues
the SRS of the UE of this community all acquisitions configuration is mutually orthogonal, and mutually orthogonal with the SRS of described CoMP UE.
(9) described CoMP UE sends uplink detection reference signal SRS according to the SRS configuration each CoMP cell in CoMP collaboration set obtained, and CoMP cell receives the SRS of described CoMP terminal.
(10) eNB in isomery cell cluster configures according to the CoMP cell SRS of this bunch of CoMP cell and this bunch of UE scale Dynamic Maintenance, selects suitable user class SRS to gather according to CoMP cell quantity and UE quantity.
As the conclusion to detailed description, should notice that those skilled in the art will be apparent from can make many changes and amendment to preferred embodiment, and does not depart from principle of the present invention in fact.This change and amendment are included within the scope of the present invention described in appended claims.
Claims (42)
1. a method for collocating uplink sounding reference signal, comprises the following steps:
Macrocell base stations in LTE heterogeneous network and the small power transmission node in the area of coverage are formed isomery cell cluster, the cell-level uplink detection reference signal (SRS) of CoMP collaboration set in the unified configuration of macrocell base stations bunch in bunch, the each community of CoMP collaboration set in the cell-level SRS of CoMP cell configuration being sent to bunch, comprises persistent district and cooperation cell;
The SRS of macrocell base stations unified configuration CoMP UE in bunch, the SRS that in SRS and the CoMP collaboration set of described CoMP UE, other obtain the UE of configuration is orthogonal, the each community of CoMP collaboration set in the SRS resource of described CoMP UE being sent to bunch, comprises persistent district and cooperation cell;
The each community of CoMP collaboration set is configured according to the cell-level SRS configuration received;
The CoMP UE SRS resource received configuration is sent to described CoMP UE by high-level signaling by the persistent district of described CoMP UE, the persistent district of described CoMP UE configures the SRS resource of the non-CoMP UE in this community voluntarily, and the SRS that all UE obtaining configuration in this community comprise described CoMP UE is mutually orthogonal;
The cooperation cell of described CoMP UE configures the SRS resource of the non-CoMP UE in this community voluntarily, and the SRS of the UE of this community all acquisitions configuration is mutually orthogonal, and mutually orthogonal with the SRS of described CoMP UE.
2. the method for collocating uplink sounding reference signal according to claim 1, also comprises the step sending uplink detection reference signal:
Described CoMP UE sends SRS according to the SRS configuration each CoMP cell in CoMP collaboration set obtained;
CoMP cell receives the SRS of described CoMP UE.
3. the method for collocating uplink sounding reference signal according to claim 1 or 2, allocating cell level uplink detection reference signal, further comprising the steps of:
Macrocell base stations in isomery cell cluster configures according to the CoMP cell SRS of this bunch of CoMP cell and this bunch of UE scale Dynamic Maintenance, selects suitable user class SRS to gather according to CoMP cell quantity and UE quantity.
4. the method for collocating uplink sounding reference signal according to claim 1 or 2, allocating cell level uplink detection reference signal, comprises the following steps:
CoMP cell user is divided into multiple user class SRS the SRS cycle gather, and by SRS transmission is biased, user class SRS set is subdivided into the non-CoMP user SRS subset of CoMP user SRS subset sums.
5. the method for collocating uplink sounding reference signal according to claim 3, allocating cell level uplink detection reference signal, comprises the following steps:
CoMP cell user is divided into multiple user class SRS the SRS cycle gather, and by SRS transmission is biased, user class SRS set is subdivided into the non-CoMP user SRS subset of CoMP user SRS subset sums.
6. the method for collocating uplink sounding reference signal according to claim 4, further comprising the steps of:
The non-CoMP user SRS subset that in user's SRS cycle of persistent district non-CoMP UE and user's SRS transmission are biased and belong to bunch, eNB issues;
User's SRS cycle of cooperation cell non-CoMP UE and user's SRS transmission are biased the non-CoMP user SRS subset belonging to eNB and issue.
7. the method for collocating uplink sounding reference signal according to claim 5, further comprising the steps of:
The non-CoMP user SRS subset that in user's SRS cycle of persistent district non-CoMP UE and user's SRS transmission are biased and belong to bunch, eNB issues;
User's SRS cycle of cooperation cell non-CoMP UE and user's SRS transmission are biased the non-CoMP user SRS subset belonging to eNB and issue.
8. the method for collocating uplink sounding reference signal according to claim 4, further comprising the steps of:
CoMP user SRS subset in isomery cell cluster and non-CoMP user SRS subset take static configuration, or adjust the size of corresponding CoMP user SRS subset and non-CoMP user SRS subset according to CoMP cell quantity and UE Number dynamics.
9. the method for collocating uplink sounding reference signal according to claim 5, further comprising the steps of:
CoMP user SRS subset in isomery cell cluster and non-CoMP user SRS subset take static configuration, or adjust the size of corresponding CoMP user SRS subset and non-CoMP user SRS subset according to CoMP cell quantity and UE Number dynamics.
10. the method for collocating uplink sounding reference signal according to claim 6, further comprising the steps of:
CoMP user SRS subset in isomery cell cluster and non-CoMP user SRS subset take static configuration, or adjust the size of corresponding CoMP user SRS subset and non-CoMP user SRS subset according to CoMP cell quantity and UE Number dynamics.
The method of 11. collocating uplink sounding reference signals according to claim 7, further comprising the steps of:
CoMP user SRS subset in isomery cell cluster and non-CoMP user SRS subset take static configuration, or adjust the size of corresponding CoMP user SRS subset and non-CoMP user SRS subset according to CoMP cell quantity and UE Number dynamics.
12. according to claim 1 or 2 method of collocating uplink sounding reference signal, further comprising the steps of:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
The method of 13. collocating uplink sounding reference signals according to claim 3, further comprising the steps of:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
The method of 14. collocating uplink sounding reference signals according to claim 4, further comprising the steps of:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
The method of 15. collocating uplink sounding reference signals according to claim 5, further comprising the steps of:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
The method of 16. collocating uplink sounding reference signals according to claim 6, further comprising the steps of:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
The method of 17. collocating uplink sounding reference signals according to claim 7, further comprising the steps of:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
The method of 18. collocating uplink sounding reference signals according to claim 8, further comprising the steps of:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
The method of 19. collocating uplink sounding reference signals according to claim 9, further comprising the steps of:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
The method of 20. collocating uplink sounding reference signals according to claim 10, further comprising the steps of:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
21. according to the method for collocating uplink sounding reference signal described in claim 11, further comprising the steps of:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
The LTE heterogeneous network of 22. 1 kinds of collocating uplink sounding reference signals, the macrocell base stations in LTE heterogeneous network and the small power transmission node in the area of coverage form isomery cell cluster, and described LTE heterogeneous network comprises:
Base station, the cell-level uplink detection reference signal (SRS) of CoMP collaboration set in unified configuration bunch, the SRS configuration of unified configuration CoMP UE; The each community of CoMP collaboration set in being sent to by the SRS of the cell-level SRS of CoMP cell and CoMP UE bunch, comprises persistent district and cooperation cell, and the SRS that in SRS and the CoMP collaboration set of described CoMP UE, other obtain the UE of configuration is orthogonal;
CoMP UE persistent district, cell-level SRS configuration according to receiving is configured, the CoMP UE SRS resource received configuration is sent to described CoMPUE by high-level signaling, described CoMP UE persistent district configures the SRS resource of the non-CoMP UE in this community voluntarily, and the SRS that all UE obtaining configuration in this community comprise described CoMP UE is mutually orthogonal;
CoMP UE cooperation cell, the cell-level SRS configuration according to receiving is configured, and configures the SRS resource of the non-CoMP UE in this community voluntarily, and the SRS of the UE of this community all acquisitions configuration is mutually orthogonal, and mutually orthogonal with the SRS of described CoMP UE.
23. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 22, wherein:
Described CoMP UE persistent district and CoMP UE cooperation cell also receive the SRS that described CoMP UE sends.
24. according to claim 22 or 23 the LTE heterogeneous network of collocating uplink sounding reference signal, wherein:
Described base station configures according to the CoMP cell SRS of this bunch of CoMP cell and this bunch of UE scale Dynamic Maintenance, selects suitable user class SRS to gather according to CoMP cell quantity and UE quantity.
25. according to claim 22 or 23 the LTE heterogeneous network of collocating uplink sounding reference signal, wherein:
CoMP cell user is divided into multiple user class SRS the SRS cycle and gathers by described base station, and by SRS transmission is biased, user class SRS set is subdivided into the non-CoMP user SRS subset of CoMP user SRS subset sums.
26. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 24, wherein:
CoMP cell user is divided into multiple user class SRS the SRS cycle and gathers by described base station, and by SRS transmission is biased, user class SRS set is subdivided into the non-CoMP user SRS subset of CoMP user SRS subset sums.
27. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 25, wherein:
The non-CoMP user SRS subset that in user's SRS cycle of described CoMP UE persistent district non-CoMP UE and user's SRS transmission are biased and belong to bunch, eNB issues;
User's SRS cycle of described CoMP UE cooperation cell non-CoMP UE and user's SRS transmission are biased the non-CoMP user SRS subset belonging to eNB and issue.
28. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 26, wherein:
The non-CoMP user SRS subset that in user's SRS cycle of described CoMP UE persistent district non-CoMP UE and user's SRS transmission are biased and belong to bunch, eNB issues;
User's SRS cycle of described CoMP UE cooperation cell non-CoMP UE and user's SRS transmission are biased the non-CoMP user SRS subset belonging to eNB and issue.
29. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 25, wherein:
CoMP user SRS subset in isomery cell cluster and non-CoMP user SRS subset take static configuration, or adjust the size of corresponding CoMP user SRS subset and non-CoMP user SRS subset according to CoMP cell quantity and UE Number dynamics.
30. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 26, wherein:
CoMP user SRS subset in isomery cell cluster and non-CoMP user SRS subset take static configuration, or adjust the size of corresponding CoMP user SRS subset and non-CoMP user SRS subset according to CoMP cell quantity and UE Number dynamics.
31. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 27, wherein:
CoMP user SRS subset in isomery cell cluster and non-CoMP user SRS subset take static configuration, or adjust the size of corresponding CoMP user SRS subset and non-CoMP user SRS subset according to CoMP cell quantity and UE Number dynamics.
32. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 28, wherein:
CoMP user SRS subset in isomery cell cluster and non-CoMP user SRS subset take static configuration, or adjust the size of corresponding CoMP user SRS subset and non-CoMP user SRS subset according to CoMP cell quantity and UE Number dynamics.
33. according to claim 22 or 23 the LTE heterogeneous network of collocating uplink sounding reference signal, wherein:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
34. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 24, wherein:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
35. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 25, wherein:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
36. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 26, wherein:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
37. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 27, wherein:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
38. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 28, wherein:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
39. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 29, wherein:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
40. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 30, wherein:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
41. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 31, wherein:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
42. according to the LTE heterogeneous network of collocating uplink sounding reference signal described in claim 32, wherein:
The SRS resource of the non-CoMP cell in isomery cell cluster is configured voluntarily by this community.
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| CN103415067B (en) * | 2013-08-30 | 2016-06-08 | 电子科技大学 | A kind of signal-noise ratio estimation method based on detection reference signal |
| US9787370B2 (en) | 2014-03-31 | 2017-10-10 | Huawei Technologies Co., Ltd. | Dynamic clustering for radio coordination in a virtual network |
| CN104168656B (en) * | 2014-08-25 | 2018-07-24 | 大唐移动通信设备有限公司 | A kind of detection reference signal SRS resource distribution method and device |
| CN105472745B (en) * | 2014-09-04 | 2020-09-08 | 北京三星通信技术研究有限公司 | Method and equipment for allocating sounding pilot signal resources |
| CN105490788B (en) * | 2014-09-18 | 2018-12-28 | 中国移动通信集团公司 | A kind of detection reference signal multiplexing method, apparatus and system based on heterogeneous network |
| CN104853362B (en) * | 2015-03-27 | 2019-04-19 | 北京邮电大学 | A Secure Transmit Beamforming Method for Heterogeneous Networks |
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