CN103052161A - Method for configuring TP (transmission point) under condition of sharing cell identifier between macro cell and micro cell - Google Patents
Method for configuring TP (transmission point) under condition of sharing cell identifier between macro cell and micro cell Download PDFInfo
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- CN103052161A CN103052161A CN2011103071166A CN201110307116A CN103052161A CN 103052161 A CN103052161 A CN 103052161A CN 2011103071166 A CN2011103071166 A CN 2011103071166A CN 201110307116 A CN201110307116 A CN 201110307116A CN 103052161 A CN103052161 A CN 103052161A
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Abstract
The invention provides a method for configuring a TP (transmission point) under the condition of sharing a cell identifier between a macro cell and a micro cell. The method comprises the following steps that user equipment (UE) measures and transmits an uplink survey reference signal (SRS); a macro base station measures SRS receiving power of all the TPs from one cell; the macro base station orders the receiving power of each TP by size and takes at least one TP with the highest sequence as a best TP set; and the macro base station configures the best TP set to the UE.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to the heterogeneous network technology, particularly macrocell and Microcell are shared the method that configures transfer point (TP, Transmission Point) in the cell ID situation.
Background technology
It is that macrocell (macro cell) is different with the cell ID (Cell-ID) of Microcell (pico cell) that the heterogeneous network interference coordination of tradition Rel 10 strengthens (eICIC), use almost blank subframe (ABS, Almost Blank Subframe)/multicast single frequency network (MBSFN, Multicast Broadcast Single Frequency Network) and subframe be offset to overcome the interference from grand layer (macro layer).Consider the capacity of backhaul effect and the multifrequency nature by X2 interface transmission, semi-static cooperation between macro layer and the microbedding (pico (femto) layer).The characteristic of Rel.10 eICIC is as follows: each macro base station is set up respectively different residential quarters with little base station, by reusing of control and data channel, produces a cell splitting gain (running time-frequency resource is reused).Macrocell muting has produced and has produced simultaneously a plurality of independently Microcells, has strengthened like this throughput of user's throughput, particularly Cell Edge User.But the interference to Microcell from the channel condition information pilot tone (CSI-RS) of macrocell is very large.The MBSFN subframe can move on to the data area to CSI-RS.Yet the MBSFN subframe but can not be at #0, #4, and #5 configures on the subframe of and#9..
Compare the method that macrocell and Microcell among the eICIC of Rel-10 use respectively the different districts sign, the method that macrocell and Microcell are shared cell ID has very large advantage, can avoid the switching between the residential quarter, particularly under the scene of pico than comparatively dense of the individual cell ID of network design, it is very large that number is switched in the minizone.Because the signal within macrocell coverage area is all from identical residential quarter, the orthogonality between macrocell and the Microcell signal is held.From some interference problems that cause synchronously, the problem of CSI-RS and control channel can be avoided effectively.
Fig. 1 is the schematic network structure that macrocell and Microcell are shared cell ID under the heterogeneous network.In this network configuration, different TP can be by different CSI-RS resource index configurations.Separate by usage space, two TP can reuse identical CSI-RS resource index configuration, if they are at a distance of enough far away.According to the position of UE in the residential quarter, for the transmission of optimal DL-SCH, be the set from hithermost single TP or TP.Network need to have the ability to determine which TP is that the best radio condition of UE experience and this are along with mobile and changeable in the residential quarter of UE.In the prior art, the scheme that optimal T P selects is also inapplicable to the scene of macrocell and the shared cell ID of Microcell.
Summary of the invention
The invention provides macrocell and Microcell and share the method for configuration TP in the cell ID situation,
A kind of macrocell that the embodiment of the invention provides and Microcell are shared the method for configuration TP in the cell ID situation, comprise the steps:
Subscriber equipment measure and transmit out-hole run reference signal SRS;
Macro base station is measured the SRS received power from all TP in the residential quarter;
Macro base station sorts the received power of described each TP according to size, at least one the highest TP of ordering is gathered as best TP;
Macro base station with described best TP set configuration to UE.
Preferably, described macro base station comprises described best TP set configuration to UE:
When UE moves out the coverage of place TP, reporting channel quality indication CQI;
The CQI measurement result that macro base station reports based on UE need to judge whether to switch, if need to switch, then eNB is the best TP set of UE configuration by high-level signaling.
Preferably, described macro base station comprises described best TP set configuration to UE:
UE determines best TP set, and reporting channel quality indication CQI also reports the TP set of determined the best simultaneously;
Macro base station judges that whether the received power of UE place TP is greater than pre-configured handoff threshold value, if do not send any indication; Otherwise indication UE switches to the TP set of the best that reports.
Preferably, macro base station comprises described best TP set configuration to UE:
Macro base station is by semi-static the first set that has more TP to one of UE configuration of high-level signaling;
Macro base station selects second set configuration that has less TP to UE by dynamic signaling in the first set of semi-static setting.
Preferably, described high-level signaling is the radio resource control RRC signaling.
The embodiment of the invention also provides another kind of macrocell and Microcell to share the method for configuration TP in the cell ID situation, comprises the steps:
UE reports Reference Signal Received Power RSRP or Reference Signal Received Quality RSRQ to network side;
Network side reports RSRP or RSRQ information according to UE, finds the TP set the strongest to the UE signal transmission, with described TP set notice UE;
UE reports the channel quality information of all TP in the described TP set;
The channel information that network side reports according to UE is therefrom selected best the 2nd TP set of channel quality, and described the 2nd TP set is distributed to UE as the TP set of optimum.
Preferably, UE reports the channel quality information of all TP in the described TP set to comprise:
UE measures the channel condition information pilot tone CSI-RS of all TP in the described TP set, obtains corresponding channel quality information;
UE reports the channel quality information that obtains.
As can be seen from the above technical solutions, terminal or network side are measured the signal quality of TP, and with signal quality preferably the TP set configuration to UE.The present invention efficiently solves at macrocell and Microcell and shares under the scene of cell ID, owing to the moving direction of UE, when moving range changes, cause systematic function to descend, select new TP by measuring to UE, make the UE always can be movable in the scope of optimal T P, the Effective Raise systematic function strengthens communication quality.
Description of drawings
Fig. 1 is the schematic network structure that macrocell and Microcell are shared cell ID under the heterogeneous network;
Fig. 2 is the system of selection schematic flow sheet of the optimal T P of embodiment of the invention proposition.
Embodiment
The present invention is directed to macrocell and Microcell and share the system of selection that proposes a kind of optimal T P in the cell ID situation, trigger the port reprovision of CSI-RS by the measurement of out-hole run reference signal (SRS) measurement or CSI-RS, by the TP of reprovision to UE configuration the best.Below by specific embodiment the present invention program is described in detail.
Embodiment one: trigger CSI-RS port reprovision based on out-hole run
In order to find optimum TP, uses the SRS that UE sends and the signal strength signal intensity (from all TP in the residential quarter) of measuring all TP to indicate (CQI) for channel quality and report the pattern that configures CSI-RS.Macro base station (eNB) is measured first power that SRS received power and use from a plurality of TP receive and is removed to estimate absolute path loss from a plurality of TP to UE.The received power of each TP is sorted according to size.The high optimal T P that is sorts.
The handling process of embodiment one comprises the steps: as shown in Figure 2
Step 201: subscriber equipment measure and transmit out-hole run reference signal SRS;
Step 202: macro base station is measured the SRS received power from all TP in the residential quarter;
Step 203: macro base station sorts the received power of described each TP according to size, and at least one the highest TP of ordering is gathered as best TP;
Step 204: macro base station with described best TP set configuration to UE.
For embodiment one, can adopt semi-static signaling, dynamic signaling and semi-static dynamic signaling combination during concrete configuration.
Scheme one: semi-static signaling
When UE moves out the coverage of place TP, the CQI measurement result that macro base station (eNB) reports based on UE need to judge whether to switch, if need to switch, then eNB gathers by TP or the TP of high-level signaling (such as, RRC signaling) for the best of UE configuration.The best TP set of scheme one is that uplink SRS is measured, and the information that network side reports according to UE is that UE distributes best TP set from the angle of network side.The best TP set that network side is distributed to UE is not necessarily best concerning UE.
Scheme two: dynamic signaling
UE reports the set of TP or the TP of a best at every turn when reporting CQI.The best TP set that reports of UE herein is that UE thinks to own best TP set.
For avoiding " Ping-Pang " effect, a handoff threshold value need to be set, when being higher than the handoff threshold value, the received power of UE place TP do not switch, UE is also according to the configuration effort of place TP, when the received power of UE place TP is lower than the handoff threshold value, the TP of this moment has not been the best TP of UE, need to carry out reprovision to TP set, and UE switches under the set of the TP of the best that reports or TP and works.
Scheme three: semi-staticly be combined with dynamic signaling
ENB has the first set of more TP by one of semi-static configuration of high-level signaling (such as, RRC signaling), then macro base station selects second set configuration that has less TP to UE by dynamic signaling in the first set of semi-static setting.
Embodiment two: based on descending CSI-RS measurement triggering CSI-RS port reprovision.
For the CSI-RS port, define new Reference Signal Received Power (RSRP, Reference Signal Receiving Power)/Reference Signal Received Quality (RSRQ, Reference Signal Receiving Quality) measurement mechanism, UE is by reporting RSRP or RSRQ, network side reports RSRP or RSRQ information according to UE, find that set is the better TP set of transmission to the strongest TP of UE signal transmission, with described TP set notice UE, then UE reports the channel quality information (recording by CSI-RS) of all TP in the TP set, the channel information that network side reports according to UE, therefrom select best the 2nd TP set of channel quality, and described the 2nd TP set is distributed to UE as the TP set of optimum.Described network side is generally macro base station.
The present invention efficiently solves at macrocell and Microcell and shares under the scene of cell ID, owing to the moving direction of UE, when moving range changes, cause systematic function to descend, select new TP by measuring to UE, make the UE always can be movable in the scope of optimal T P, the Effective Raise systematic function strengthens communication quality.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (7)
1. a macrocell and Microcell are shared the method for configuration transfer point TP in the cell ID situation, it is characterized in that, comprise the steps:
Subscriber equipment measure and transmit out-hole run reference signal SRS;
Macro base station is measured the SRS received power from all TP in the residential quarter;
Macro base station sorts the received power of described each TP according to size, at least one the highest TP of ordering is gathered as best TP;
Macro base station with described best TP set configuration to UE.
2. method according to claim 1 is characterized in that, described macro base station comprises described best TP set configuration to UE:
When UE moves out the coverage of place TP, reporting channel quality indication CQI;
The CQI measurement result that macro base station reports based on UE need to judge whether to switch, if need to switch, then eNB is the best TP set of UE configuration by high-level signaling.
3. method according to claim 1 is characterized in that, described macro base station comprises described best TP set configuration to UE:
UE determines best TP set, and reporting channel quality indication CQI also reports the TP set of determined the best simultaneously;
Macro base station judges that whether the received power of UE place TP is greater than pre-configured handoff threshold value, if do not send any indication; Otherwise indication UE switches to the TP set of the best that reports.
4. method according to claim 1 is characterized in that, macro base station comprises described best TP set configuration to UE:
Macro base station is by semi-static the first set that has more TP to one of UE configuration of high-level signaling;
Macro base station selects second set configuration that has less TP to UE by dynamic signaling in the first set of semi-static setting.
5. according to claim 2 or 4 described methods, it is characterized in that, described high-level signaling is the radio resource control RRC signaling.
6. a macrocell and Microcell are shared the method for configuration transfer point TP in the cell ID situation, it is characterized in that, comprise the steps:
UE reports Reference Signal Received Power RSRP or Reference Signal Received Quality RSRQ to network side;
Network side reports RSRP or RSRQ information according to UE, finds the TP set the strongest to the UE signal transmission, with described TP set notice UE;
UE reports the channel quality information of all TP in the described TP set;
The channel information that network side reports according to UE is therefrom selected best the 2nd TP set of channel quality, and described the 2nd TP set is distributed to UE as the TP set of optimum.
7. method according to claim 6 is characterized in that, UE reports the channel quality information of all TP in the described TP set to comprise:
UE measures the channel condition information pilot tone CSI-RS of all TP in the described TP set, obtains corresponding channel quality information;
UE reports the channel quality information that obtains.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017148399A1 (en) * | 2016-03-03 | 2017-09-08 | 华为技术有限公司 | Communication method and apparatus applied to super cell |
| WO2017185979A1 (en) * | 2016-04-27 | 2017-11-02 | Huawei Technologies Co., Ltd. | Sounding reference signal (srs) design for cellular time division duplex (tdd) mmwave systems |
| WO2018121188A1 (en) * | 2016-12-30 | 2018-07-05 | 华为技术有限公司 | Method, device and system for transmitting uplink measurement reference signal |
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| WO2010128786A2 (en) * | 2009-05-04 | 2010-11-11 | Lg Electronics Inc. | Method for providing connection type information and method for controlling radio resource of home (e)nodeb |
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| WO2010128786A2 (en) * | 2009-05-04 | 2010-11-11 | Lg Electronics Inc. | Method for providing connection type information and method for controlling radio resource of home (e)nodeb |
| US20110194527A1 (en) * | 2010-02-11 | 2011-08-11 | Qualcomm Incorporated | Frequency and time domain range expansion |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017148399A1 (en) * | 2016-03-03 | 2017-09-08 | 华为技术有限公司 | Communication method and apparatus applied to super cell |
| CN107155200A (en) * | 2016-03-03 | 2017-09-12 | 华为技术有限公司 | Communication means and device applied to super cell |
| US10420004B2 (en) | 2016-03-03 | 2019-09-17 | Huawei Technologies Co., Ltd. | Communication method and apparatus applied to hyper cell |
| CN107155200B (en) * | 2016-03-03 | 2020-07-28 | 华为技术有限公司 | Communication method and device applied to super cell |
| WO2017185979A1 (en) * | 2016-04-27 | 2017-11-02 | Huawei Technologies Co., Ltd. | Sounding reference signal (srs) design for cellular time division duplex (tdd) mmwave systems |
| US11522743B2 (en) | 2016-04-27 | 2022-12-06 | Futurewei Technologies, Inc. | Sounding reference signal (SRS) design for cellular time division duplex (TDD) mmWave systems |
| US11888665B2 (en) | 2016-04-27 | 2024-01-30 | Futurewei Technologies, Inc. | Sounding reference signal (SRS) design for cellular time division duplex (TDD) mmWave systems |
| WO2018121188A1 (en) * | 2016-12-30 | 2018-07-05 | 华为技术有限公司 | Method, device and system for transmitting uplink measurement reference signal |
| US11246050B2 (en) | 2016-12-30 | 2022-02-08 | Huawei Technologies Co., Ltd. | Method for transmitting uplink measurement reference signal, apparatus, and system |
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