CN102026298B - Method and system for eliminating SRS interference between different cell users in multi-point coordination - Google Patents
Method and system for eliminating SRS interference between different cell users in multi-point coordination Download PDFInfo
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Abstract
The invention discloses a method for eliminating sounding reference signal (SRS) interference between different cell users in multi-point coordination, which comprises the following steps of: configuring same virtual cell identifier for user equipment (UE) performing multi-point coordinated transmission in the same multi-point coordinated transmission cell, and informing the UE performing the multi-point coordinated transmission in various cells of the virtual cell identifier; and generating sounding reference signals (SRS) by using the UE performing the multi-point coordinated transmission on the basis of the virtual cell identifier and sending to the network side. In the technical scheme, SRS sequences of the UE in different cells of the same CoMP set are generated on the basis of the same virtual cell identifier (ID), so the generated SRS sequences of the UE have good orthogonality, bearing positions are not limited when the SRS resources are configured for the cells in the CoMP set, different cyclic shifts are only configured for the SRS sequences of different UE in the CoMP cells occupying the same time frequency resource, and the interference between the SRS can be eliminated.
Description
Technical Field
The present invention relates to a technique for eliminating Sounding Reference Symbol (SRS) interference between users in different cells in a coordinated Multi-Point (CoMP), and more particularly, to a method and a system for eliminating SRS interference between users in different cells in a CoMP.
Background
With the increasing demand of people for future communication, the spectrum efficiency at the edge of a cell is more emphasized, and how to improve the transmission quality and throughput at the edge of the cell becomes a competitive research topic. The coordinated multi-point transmission technology utilizes the coordinated transmission of a plurality of cell transmitting antennas, and can effectively solve the problem of interference at the edge of a cell, thereby improving the capacity and reliability of a wireless link. Therefore, the CoMP technology is introduced into the LTE-a system as a key technology.
In the CoMP technology, coordinated transmission among cells is established based on channel information from each cell to a User Equipment (UE). In a direct method, after the UE measures the Channel state information from each cooperating cell to the UE through the downlink pilot, the Channel state information is explicitly fed back to the base station through a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH). The method can enable the base station to obtain more comprehensive channel information, but the feedback overhead is very large at the moment, and the method is very difficult relative to an uplink channel with limited feedback capacity. An improved method is implicit feedback, that is, the channel information is converted into information such as Precoding Matrix Index (PMI) and the like after being subjected to certain preprocessing, and then is fed back to the base station. The method can reduce the feedback overhead to a certain extent, but the overhead is still large, and the method adopts a certain compression technology to cause that the channel information acquired by the base station is not accurate enough. In addition, there is another method that the UE sends SRS to each cell by using the reciprocity of uplink and downlink channels, and the base station replaces the corresponding downlink channel information according to the uplink channel information from the UE to each cell measured by the SRS.
The SRS sequence in LTE Rel-8 is generated in the following way: firstly, generating a ZC (Zadoff-Chu) sequence with a certain length, called a base sequence, according to a cell Identification (ID), wherein the base sequence has the property that the same base sequence and different shifted sequences thereof have good orthogonality, and the orthogonality is not satisfied between different base sequences generated based on different IDs; based on the base sequence, the UE performs certain shift according to the parameters configured in the upper layer to obtain the corresponding SRS sequence.
In the CoMP transmission technology, the base station side needs to know the channel state information between the UE and multiple cells, so that the SRS-based method is adopted, and the base station can obtain the channel state information between each cell and the UE by detecting the SRS transmitted by the UE through the multiple cells. However, in CoMP transmission, the cell IDs are usually different, and thus, the base sequences of SRS transmitted by UEs located in different cells are different. According to the principle of CoMP, SRSs transmitted by different UEs have the same bandwidth and frequency domain location. Therefore, the SRS sequences sent by the UE of different cells generated based on different base sequences have no orthogonality, and the SRS sent by different UE have large interference, so that the channel detection performance of the base station side is reduced, and the CoMP transmission quality is further reduced.
For the above problems, some companies propose that, for the SRS of different cell UEs in the CoMP set, the SRS of different cell UEs is sent in a time division or frequency division manner to avoid the SRS interference of the UE in different cells, but, a time division method is adopted, that is, the SRS of different cell UEs are sent on different subframes, so that the channel state information measured by the base station corresponds to the channel information of different cell UEs at different times, and has a certain influence on CoMP transmission, and in addition, certain limitation is brought to the scheduling of the SRS; however, if a frequency division method is adopted, that is, SRSs of UEs in different cells are transmitted on different Resource Blocks (RBs), frequency resources are wasted, and channel state information obtained by the base station belongs to different frequency bands, which may also affect CoMP transmission.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and a system for eliminating SRS interference between users in different cells in a coordinated multi-point system, which can eliminate SRS interference between ues in different cells in a CoMP set.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for eliminating sounding reference symbol interference among different cell users in multi-point cooperation comprises the following steps:
configuring the same virtual cell identification for UE performing multipoint cooperative transmission in the same multipoint cooperative transmission cell set, and informing the virtual cell identification to the UE performing multipoint cooperative transmission in each cell; and
and the UE performing the coordinated multi-point transmission generates a Sounding Reference Symbol (SRS) based on the virtual cell representation and sends the SRS to a network side.
Preferably, the UE generates an SRS sequence based on the virtual cell identifier, including:
the UE determines the length of an SRS sequence of the UE according to the SRS bandwidth parameters configured for the UE by the multipoint coordinated cell, and generates a base sequence of the SRS sequence of the UE based on the virtual cell identifier; and
and the UE shifts the base sequence of the SRS sequence of the UE according to the shift parameters and the initial position information of the SRS sequence configured for the UE by the multipoint coordinated cell to generate the SRS sequence.
Preferably, the determining, according to the SRS bandwidth parameter configured for the UE by the cell in multipoint cooperation, the length of the SRS sequence of the UE is specifically:
determining the number P of occupied Resource Blocks (RB) according to SRS bandwidth parameters configured for the UE, and determining the length of an SRS sequence of the UE according to P, wherein the length is as follows: (P × 12)/2.
Preferably, the generating a base sequence of the SRS sequence of the UE based on the virtual cell identity includes:
if the length of the SRS sequence is not more than 36, determining the base sequence of the SRS sequence by inquiring a base sequence table of the SRS sequence configured for the UE according to the virtual cell identifier; if the length of the SRS sequence is greater than 36, determining a base sequence of the SRS sequence of the UE by:
Preferably, the virtual identifier is different from a cell identifier of each cell in the multipoint coordination.
Preferably, the value of the virtual identifier is an element in a set {0, 1, 2., 503 }.
A system for canceling sounding reference symbol interference (srs) between users in different cells in multi-point cooperation, comprising:
a determining unit, configured to configure the same virtual cell identifier for the UE performing coordinated multipoint transmission in the same coordinated multipoint transmission cell set;
a notifying unit, configured to notify the virtual cell identifier to a UE performing coordinated multipoint transmission in each cell;
a generating unit, located in a UE performing coordinated multipoint transmission, configured to generate an SRS based on the virtual cell identifier; and
and a transmitting unit, configured to transmit the SRS sequence generated by the generating unit to a network side.
Preferably, the generating unit generates an SRS sequence based on the virtual cell identifier, including: determining the length of an SRS sequence of the UE according to the SRS bandwidth parameters configured for the UE by the multipoint coordinated cell, and generating a base sequence of the SRS sequence of the UE based on the virtual cell identifier; and
and shifting a base sequence of the SRS sequence of the UE according to the initial position information and the shift parameters of the SRS sequence configured for the UE by the multipoint coordinated cell to generate the SRS sequence.
Preferably, the determining unit determines, according to the SRS bandwidth parameter configured for the UE by the cell in multipoint cooperation, the length of the SRS sequence of the UE, specifically:
determining the number P of occupied Resource Blocks (RB) according to SRS bandwidth parameters configured for the UE, and determining the length of an SRS sequence of the UE according to P, wherein the length is as follows: (P × 12)/2.
Preferably, the generating unit generates a base sequence of the SRS sequence of each cell based on the virtual cell identifier, and includes: if the length of the SRS sequence is not more than 36, determining the base sequence of the SRS sequence by inquiring a base sequence table of the SRS sequence configured for the UE according to the virtual cell identifier; if the length of the SRS sequence is greater than 36, determining a base sequence of the SRS sequence of the UE by:
Preferably, the virtual identifier is different from a cell identifier of each cell in the multipoint coordination, and a value of the virtual identifier is an element in a set {0, 1, 2.·, 503 }.
In the invention, the same virtual cell ID is set for the UE performing CoMP transmission in each cell of the CoMP set, the virtual cell ID is notified to each UE performing CoMP transmission in each cell of the CoMP set, and each UE performing CoMP transmission determines an SRS sequence for the corresponding parameters configured for the UE according to the virtual cell ID and the CoMP cell where the UIE is located, and sends the SRS sequence to the network side. In the technical scheme of the invention, as the SRS sequences of the UE for carrying out CoMP transmission in different cells in the same CoMP set are generated based on the same virtual cell ID, the SRS sequences generated by the UE for carrying out CoMP transmission have good orthogonality, and when the SRS resources of the UE for carrying out CoMP transmission in each CoMP set cell are configured, the SRS sequences of the UE for carrying out CoMP transmission in different cells are not required to be limited to be positioned on different carriers or subframes, and the interference problem among the SRS can be eliminated only by configuring different cyclic shifts for the SRS sequences of different UE for carrying out CoMP transmission in the CoMP cells occupying the same time-frequency resources. The invention is simple and practical to implement.
Drawings
FIG. 1 is a flowchart illustrating a method for canceling SRS interference between users in different cells in multi-point cooperation according to the present invention;
fig. 2 is a schematic diagram of SRS sequence bearer of a UE in a CoMP cooperating cell according to the present invention;
fig. 3 is a schematic diagram of the structure of the system for eliminating the srs interference between users in different cells in the multi-point cooperation according to the present invention.
Detailed Description
The basic idea of the invention is: the method comprises the steps of setting the same virtual cell ID for UE (user equipment) performing CoMP transmission in each cell of a CoMP set, notifying each UE performing CoMP transmission in each cell of the CoMP set of the virtual cell ID, determining an SRS (sounding reference signal) sequence by each UE performing CoMP transmission according to the virtual cell ID and corresponding parameters configured for the UE by the CoMP cell where the UE is located, and sending the SRS sequence to a network side. In the technical scheme of the invention, as the SRS sequences of the UE for carrying out CoMP transmission in different cells in the same CoMP set are generated based on the same virtual cell ID, the SRS sequences generated by the UE for carrying out CoMP transmission have good orthogonality, and when the SRS resources of the UE for carrying out CoMP transmission in each CoMP set cell are configured, the SRS sequences of the UE for carrying out CoMP transmission in different cells are not required to be limited to be positioned on different carriers or subframes, and the interference problem among the SRS can be eliminated only by configuring different cyclic shifts for the SRS sequences of different UE for carrying out CoMP transmission in the CoMP cells occupying the same time-frequency resources.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings by way of examples.
Fig. 1 is a flowchart of a method for eliminating srs interference between users in different cells in a multi-point cooperation according to the present invention, and as shown in fig. 1, the method for eliminating srs interference between users in different cells in a multi-point cooperation according to the present invention includes the following steps:
step 101: and configuring the same virtual cell identification for the UE performing the multi-point cooperative transmission in the same multi-point cooperative transmission cell set, and informing the UE performing the multi-point cooperative transmission in each cell of the virtual cell identification.
Assume that there are three different cells in the CoMP set, and some UEs in each cell perform CoMP transmission, where UE1 is located in cell 1, UE2 is located in cell 2, and UE3 is located in cell 3. According to the protocol, the ID of each cell is assumed to be set to {0, 1, 2.., 503}, assuming that the IDs of the three cells are 125, 230, and 350, respectively. The base station side allocates a same virtual ID for the UE performing coordinated multi-point transmission in the CoMP cell set, and N is usedID CoMPThis value is 280, which is different from the IDs of the three cells. Those skilled in the art will appreciate that the above values may also be any of {0, 1, 2.., 503} values other than 125, 230, 350, and 280.
Will determine NID CoMPThe value is notified to all UEs performing CoMP transmission in the CoMP cell set, where the base station side sends N through Radio Resource Control (RRC) signalingID CoMPInforming the value to all UE performing CoMP transmission in the CoMP cell set; or, implicitly notify the UE performing CoMP transmission of each cell in the CoMP cell set, that is, the N is the UE performing CoMP transmissionID CoMPThe value is associated with the existing downlink parameters, and the UE performing CoMP transmission determines the N according to the existing sent parametersID CoMPThe value indicating N, e.g. by using a particular coding for the existing parameterID CoMPThe value, a certain coding, corresponds to a specific virtual cell identity. N in the CoMP cell set can also be usedID CoMPFixed value, configuring N of different CoMP cell sets in UEID CoMPWhen the UE is determined to be located in the CoMP cell set, the configured N corresponding to the CoMP cell set is searchedID CoMPValue is sufficient, and it is not necessary to separately notify the NID CoMPThe value is obtained.
Step 102: and the UE performing the multipoint cooperative transmission generates a Sounding Reference Symbol (SRS) based on the virtual cell identifier and sends the SRS to a network side.
The UE determines the length of the SRS sequence of each cell according to the SRS bandwidth parameters configured for the UE by each cell in multipoint cooperation, and generates a base sequence of the SRS sequence of the UE based on the virtual cell identification; and the UE shifts the determined base sequence of the SRS sequence of the UE according to the shift parameters and the initial position information of the SRS sequence configured for the UE performing CoMP transmission in the coordinated multi-point cell set to generate the SRS sequence.
It is assumed that the configured system bandwidths of the three cells are all 20M. According to the CoMP principle, the SRS corresponding to the UE performing coordinated multipoint transmission in a multipoint cell set should have the same bandwidth and the same frequency domain position. Assuming that the SRS bandwidth configured by the base station for three UEs is 8 RBs, since the SRS is placed in different bits (different carriers), the length of the SRS sequence transmitted by three UEs in the three cells is (8 × 12)/2 ═ 48. Since the SRS sequence length is greater than 36, the base sequence of the SRS is generated based on the Zadoff-Chu sequence, as shown in the following formula:
r (n) denotes a Zadoff-Chu sequence (base sequence), Msc RSLength of SRS sequence for the determined UEDegree (48 in this example), xqIs expressed as length NZC RSBase sequence of SRS sequence of UE, NZC RSIs less than Msc RSIs given by (1), in this example 47, where, <math>
<mrow>
<msub>
<mi>x</mi>
<mi>q</mi>
</msub>
<mrow>
<mo>(</mo>
<mi>m</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<msup>
<mi>e</mi>
<mrow>
<mo>-</mo>
<mi>j</mi>
<mfrac>
<mrow>
<mi>πqm</mi>
<mrow>
<mo>(</mo>
<mi>m</mi>
<mo>+</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
<msubsup>
<mi>N</mi>
<mi>ZC</mi>
<mi>RS</mi>
</msubsup>
</mfrac>
</mrow>
</msup>
<mo>,</mo>
</mrow>
</math> <math>
<mrow>
<mn>0</mn>
<mo>≤</mo>
<mi>m</mi>
<mo>≤</mo>
<msubsup>
<mi>N</mi>
<mi>ZC</mi>
<mi>RS</mi>
</msubsup>
<mo>-</mo>
<mn>1</mn>
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</mrow>
</math> the q value is determined by the virtual cell identity. For the determination of the q value, reference is made to the relevant provisions in RS 36.211.
When the determined SRS sequence length is not greater than 36, according to the specification of the relevant protocol in the LTE-a system, the specific SRS base sequence of the UE may be determined by looking up the table through the set correspondence table between the SRS sequence length and the SRS base sequence.
For the same virtual ID, the base sequences used by the SRS of UE1, UE2, and UE3 in this example are the same, considering that the time-frequency positions transmitted by different SRSs in the coordinated set are the same.
It should be noted here that the Zadoff-Chu sequence described above has the following properties: Zadoff-Chu sequences generated based on the same q have good orthogonality between different shifts, but the orthogonality between Zadoff-Chu sequences generated based on different q is not ideal. Based on the same base sequence, the SRS sequences of UEs in different cells may be subjected to different cyclic shifts based on the Zadoff-Chu sequence, so as to generate the SRS sequences of the three UEs. Specifically, corresponding cyclic shift is performed according to the shift parameters of the SRS sequences configured by the RRC layers of the three CoMP cells, so that the SRS sequences of the three UEs are generated.
And finally, determining the initial positions of the SRS sequences of the three UEs according to the initial position information of the SRS sequences configured by the RRC layers of the three CoMP cells, so as to map the SRS sequences of the three UEs to the corresponding positions of the carriers. Fig. 2 is a schematic diagram of SRS sequence bearer of a UE in a CoMP cooperating cell according to the present invention, and as shown in fig. 2, as described above, SRSs of three UEs (only SRS sequence bearer of UE1 and UE2 is shown in the figure, and SRS sequence bearer of UE3 is the same as the SRS bearer of UE1 and UE 2) occupy the same time-frequency position.
In the invention, the SRS sequences of different cell UEs in CoMP transmission are generated by the cyclic shift of the basic sequence generated based on the same virtual ID, so that good orthogonality is still kept between the SRS sequences, and the UEs positioned in different cooperative cells do not need to transmit the SRS by time division or frequency division to avoid interference between the SRS sequences, thereby avoiding the waste of time-frequency resources and not increasing the complexity of resource scheduling.
Fig. 3 is a schematic structural diagram of a system for eliminating the srs interference between users in different cells in the coordinated multi-point system, and as shown in fig. 3, the system for eliminating the srs interference between users in different cells in the coordinated multi-point system of the present invention includes a determining unit 30, a notifying unit 31, a generating unit 32 and a transmitting unit 33, where the determining unit 30 is configured to configure the same virtual cell identifier for the UE performing coordinated multi-point transmission in the same coordinated multi-point transmission cell set; the notifying unit 31 is configured to notify the virtual cell identifier to a UE performing coordinated multipoint transmission in each cell; the generating unit 32 is located in the UE performing coordinated multipoint transmission, and is configured to generate an SRS based on the virtual cell identifier; the transmitting unit 33 is configured to transmit the SRS sequence generated by the generating unit to the network side. The virtual identifier is different from the cell identifier of each cell in the multi-point cooperation, and the value of the virtual identifier is an element in a set {0, 1, 2., 503 }.
Specifically, the generating unit 32 generates an SRS sequence based on the virtual cell identifier, including: determining the length of an SRS sequence of the UE according to the SRS bandwidth parameters configured for the UE by the multipoint coordinated cell, and generating a base sequence of the SRS sequence of the UE based on the virtual cell identifier; and
and shifting a base sequence of the SRS sequence of the UE according to the initial position information and the shift parameters of the SRS sequence configured for the UE by the multipoint coordinated cell to generate the SRS sequence.
The determining unit 30 determines, according to the SRS bandwidth parameter configured for the UE by the cell in multipoint cooperation, the length of the SRS sequence of the UE, specifically:
determining the number P of occupied Resource Blocks (RB) according to SRS bandwidth parameters configured for the UE, and determining the length of an SRS sequence of the UE according to P, wherein the length is as follows: (P × 12)/2.
The generating unit 32 generates a base sequence of the SRS sequence of each cell based on the virtual cell identifier, and includes: if the length of the SRS sequence is not more than 36, determining the base sequence of the SRS sequence by inquiring a base sequence table of the SRS sequence configured for the UE according to the virtual cell identifier; if the length of the SRS sequence is greater than 36, determining a base sequence of the SRS sequence of the UE by:
It should be understood by those skilled in the art that the system for canceling the srs interference between different cell users in the multi-point coordination shown in fig. 3 is designed to implement the aforementioned method for canceling the srs interference between different cell users in the multi-point coordination, and the functions of each processing unit in the system shown in fig. 3 can be understood with reference to the description of the aforementioned method, and the functions of each processing unit can be implemented by a program running on a processor or by specific logic circuits.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A method for eliminating SRS interference between users in different cells in multi-point cooperation is disclosed, which comprises:
configuring the same virtual cell identification for UE performing multipoint cooperative transmission in the same multipoint cooperative transmission cell set, and informing the virtual cell identification to the UE performing multipoint cooperative transmission in each cell; and
the UE performing the multipoint cooperative transmission generates a Sounding Reference Symbol (SRS) based on the virtual cell identifier and sends the SRS to a network side;
wherein the UE generates an SRS sequence based on the virtual cell identity, including:
the UE determines the length of an SRS sequence of the UE according to the SRS bandwidth parameters configured for the UE by the multipoint coordinated cell, and generates a base sequence of the SRS sequence of the UE based on the virtual cell identifier; and
and the UE shifts the base sequence of the SRS sequence of the UE according to the shift parameters and the initial position information of the SRS sequence configured for the UE by the multipoint coordinated cell to generate the SRS sequence.
2. The method according to claim 1, wherein the determining the length of the SRS sequence of the UE according to the SRS bandwidth parameter configured for the UE by the cell with coordinated multiple points specifically includes:
determining the number P of occupied Resource Blocks (RB) according to SRS bandwidth parameters configured for the UE, and determining the length of an SRS sequence of the UE according to P, wherein the length is as follows: (P × 12)/2.
3. The method of claim 1 or 2, wherein the generating a base sequence of SRS sequences for the UE based on the virtual cell identity comprises:
if the length of the SRS sequence is not more than 36, determining the base sequence of the SRS sequence by inquiring a base sequence table of the SRS sequence configured for the UE according to the virtual cell identifier; if the length of the SRS sequence is greater than 36, determining a base sequence of the SRS sequence of the UE by:
4. The method of claim 3, wherein the virtual cell identity is different from a cell identity of each cell in the coordinated multi-point.
5. The method of claim 4, wherein the virtual cell identifier takes on values of elements in a set {0, 1, 2, …, 503 }.
6. A system for canceling sounding reference symbol interference (srs) between users in different cells in a multi-point cooperation, comprising:
a determining unit, configured to configure the same virtual cell identifier for the UE performing coordinated multipoint transmission in the same coordinated multipoint transmission cell set;
a notifying unit, configured to notify the virtual cell identifier to a UE performing coordinated multipoint transmission in each cell;
a generating unit, located in a UE performing coordinated multipoint transmission, configured to generate an SRS based on the virtual cell identifier; and
and a transmitting unit, configured to transmit the SRS sequence generated by the generating unit to a network side.
7. The system according to claim 6, wherein the generating unit generates an SRS sequence based on the virtual cell identity, comprising: determining the length of an SRS sequence of the UE according to the SRS bandwidth parameters configured for the UE by the multipoint coordinated cell, and generating a base sequence of the SRS sequence of the UE based on the virtual cell identifier; and
and shifting a base sequence of the SRS sequence of the UE according to the initial position information and the shift parameters of the SRS sequence configured for the UE by the multipoint coordinated cell to generate the SRS sequence.
8. The system according to claim 7, wherein the determining unit determines, according to the SRS bandwidth parameter configured for the UE by the coordinated multipoint cell, a length of the SRS sequence of the UE, specifically:
determining the number P of occupied Resource Blocks (RB) according to SRS bandwidth parameters configured for the UE, and determining the length of an SRS sequence of the UE according to P, wherein the length is as follows: (P × 12)/2.
9. The system according to claim 7 or 8, wherein the generating unit generates a base sequence of the SRS sequence for each cell based on the virtual cell identifier, and includes: if the length of the SRS sequence is not more than 36, determining the base sequence of the SRS sequence by inquiring a base sequence table of the SRS sequence configured for the UE according to the virtual cell identifier; if the length of the SRS sequence is greater than 36, determining a base sequence of the SRS sequence of the UE by:
10. The system according to claim 9, wherein the virtual cell id is different from the cell ids of the cells in the coordinated multi-point system, and the virtual cell id takes on values of elements in a set {0, 1, 2, …, 503 }.
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| PCT/CN2010/072682 WO2011035590A1 (en) | 2009-09-22 | 2010-05-12 | Method and system for eliminating sounding reference symbol interference between users in different cells in multi-point coordination |
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Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5783543B2 (en) * | 2011-05-03 | 2015-09-24 | ノキア ソリューションズ アンド ネットワークス オサケユキチュア | Identifier dynamic allocation method and apparatus in hybrid cell identifier scenario |
| CN102355292A (en) * | 2011-08-05 | 2012-02-15 | 中兴通讯股份有限公司 | Method and apparatus for parameter transmission, and method and apparatus for parameter generation |
| WO2013025054A2 (en) * | 2011-08-16 | 2013-02-21 | 엘지전자 주식회사 | Method and apparatus for transmitting uplink reference signal in wireless communication system |
| CN103636245A (en) * | 2011-09-30 | 2014-03-12 | 富士通株式会社 | Uplink signal transmission method, user equipment and base station in coordinated multi-point system |
| US20130088960A1 (en) | 2011-10-07 | 2013-04-11 | Futurewei Technologies, Inc. | System and Method for Information Delivery with Multiple Point Transmission |
| US9838089B2 (en) * | 2011-10-07 | 2017-12-05 | Futurewei Technologies, Inc. | System and method for multiple point transmission in a communications system |
| CN102438247B (en) * | 2011-11-03 | 2018-02-13 | 中兴通讯股份有限公司 | Physical Cell Identifier distributes and acquisition methods, base station and user equipment |
| CN103139916B (en) * | 2011-11-29 | 2016-03-02 | 华为技术有限公司 | The method and apparatus of row control channel transmitting data physically |
| CN103139913B (en) * | 2011-11-30 | 2015-09-30 | 中国电信股份有限公司 | A kind of method of collocating uplink sounding reference signal and LTE heterogeneous network |
| US9084252B2 (en) * | 2011-12-29 | 2015-07-14 | Qualcomm Incorporated | Processing enhanced PDCCH (ePDCCH) in LTE |
| CN102547994A (en) * | 2012-01-18 | 2012-07-04 | 中兴通讯股份有限公司 | Method and system for eliminating inter-cell interference |
| US8953478B2 (en) * | 2012-01-27 | 2015-02-10 | Intel Corporation | Evolved node B and method for coherent coordinated multipoint transmission with per CSI-RS feedback |
| CN103249147B (en) * | 2012-02-01 | 2018-07-24 | 中兴通讯股份有限公司 | The resource allocation method and system of Physical Uplink Control Channel |
| WO2013138974A1 (en) * | 2012-03-19 | 2013-09-26 | 富士通株式会社 | Method for determining base sequence and cyclic shift hopping and device thereof |
| CN103428723B (en) * | 2012-05-25 | 2016-06-15 | 上海贝尔股份有限公司 | Multipoint cooperative is measured the method and apparatus of SRS |
| US9854570B2 (en) * | 2012-06-07 | 2017-12-26 | Qualcomm Incorporated | Signaling of virtual cell ID |
| US8838119B2 (en) | 2012-06-26 | 2014-09-16 | Futurewei Technologies, Inc. | Method and system for dynamic cell configuration |
| WO2014022773A1 (en) * | 2012-08-03 | 2014-02-06 | Texas Instruments Incorporated | Uplink signaling for cooperative multipoint communication |
| US10433159B2 (en) | 2012-08-03 | 2019-10-01 | Texas Instruments Incorporated | Uplink signaling for cooperative multipoint communication |
| JP5715601B2 (en) * | 2012-08-29 | 2015-05-07 | 株式会社Ｎｔｔドコモ | Mobile communication method, radio base station, and mobile station |
| US9426673B2 (en) * | 2013-04-05 | 2016-08-23 | Qualcomm Incorporated | Virtual cell management for interference suppression and interference cancellation in LTE |
| CN105376748A (en) * | 2014-08-27 | 2016-03-02 | 中兴通讯股份有限公司 | Construction method of virtual cell, selection method of cooperating node and device |
| CN106162727B (en) * | 2015-03-31 | 2019-08-27 | 北京邮电大学 | Method for establishing connection of user equipment, small base station and macro base station |
| WO2017075746A1 (en) * | 2015-11-02 | 2017-05-11 | Qualcomm Incorporated | Techniques for managing cell identifiers and other parameters for flexible duplex operations |
| CN107155189B (en) * | 2016-03-03 | 2021-02-12 | 华为技术有限公司 | Communication method and device applied to super cell |
| US10680866B2 (en) | 2017-03-24 | 2020-06-09 | Huawei Technologies Co., Ltd. | Sounding reference signal design |
| US10873869B2 (en) * | 2017-06-16 | 2020-12-22 | Qualcomm Incorporated | Cell-specific sounding and measurement configuration |
| CN109217999B (en) * | 2017-07-07 | 2021-09-28 | 普天信息技术有限公司 | LTE network PUCCH channel pilot frequency method and equipment |
| US20220216968A1 (en) * | 2018-08-17 | 2022-07-07 | Lenovo (Beijing) Limited | Srs configurations and srs transmission |
| CN117296256A (en) * | 2022-04-26 | 2023-12-26 | 北京小米移动软件有限公司 | Wireless communication method, device, communication equipment and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106395A (en) * | 2007-08-15 | 2008-01-16 | 中兴通讯股份有限公司 | Method for controlling signaling and measuring pilot frequency |
| CN102598524A (en) * | 2009-08-18 | 2012-07-18 | 株式会社泛泰 | Method and system for transceiving group-specific information in a coordinated multi-antenna transceiver system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8086272B2 (en) * | 2007-08-06 | 2011-12-27 | Mitsubishi Electric Research Laboratories, Inc. | Wireless networks incorporating antenna selection based on received sounding reference signals |
| CN101500242B (en) * | 2008-02-01 | 2010-10-27 | 大唐移动通信设备有限公司 | Method and apparatus for configuring uplink detection reference signal |
-
2009
- 2009-09-22 CN CN200910093864.1A patent/CN102026298B/en active Active
-
2010
- 2010-05-12 WO PCT/CN2010/072682 patent/WO2011035590A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106395A (en) * | 2007-08-15 | 2008-01-16 | 中兴通讯股份有限公司 | Method for controlling signaling and measuring pilot frequency |
| CN102598524A (en) * | 2009-08-18 | 2012-07-18 | 株式会社泛泰 | Method and system for transceiving group-specific information in a coordinated multi-antenna transceiver system |
Non-Patent Citations (2)
| Title |
|---|
| Huawei.Interference analysis on SRS for CoMP.《3GPP TSG RAN WG1 Meeting #57bis R1-092367》.2009, |
| Interference analysis on SRS for CoMP;Huawei;《3GPP TSG RAN WG1 Meeting #57bis R1-092367》;20090703;全文 * |
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