CN101873670A - Processing method and system of control signaling in coordinated multipoint transmission - Google Patents
Processing method and system of control signaling in coordinated multipoint transmission Download PDFInfo
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- CN101873670A CN101873670A CN200910082485A CN200910082485A CN101873670A CN 101873670 A CN101873670 A CN 101873670A CN 200910082485 A CN200910082485 A CN 200910082485A CN 200910082485 A CN200910082485 A CN 200910082485A CN 101873670 A CN101873670 A CN 101873670A
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Abstract
The invention discloses a processing method of a control signaling in coordinated multipoint transmission, comprising the following steps of: configuring indication information for indicating the current transmission mode in a downstream control signaling by an access node according to the current transmission mode of a user; and transmitting the downstream control signaling carrying the indication information to user equipment (UE) by the access node. The invention also discloses a processing system of the control signaling in the coordinated multipoint transmission so that the UE can identify the current transmission mode according to the indication information and further carry out data receiving on the basis.
Description
Technical field
The present invention relates to the area interference treatment technology in Long Term Evolution (LTE) system, relate in particular to control signal processing method and system in a kind of multipoint cooperative transmission.
Background technology
Along with the proposition of senior Long Term Evolution (LTE-A, Long Term Evolution-Advance) demand, the user more and more payes attention to sub-district average spectral efficiency (ase) and cell edge spectrum efficiency.Comparatively speaking, the cell edge spectrum efficiency is of greatest concern, this mainly is because the provisional capital up and down of LTE-A system is with OFDM (OFDM, Orthogonal Frequency Division Multiplexing) is the basis, with traditional with code division multiple access (CDMA, Code Division MultipleAccess) is the wireless communication system difference of basic multiple access multiplexing mode, the LTE-A system does not have processing gain, the sub-district is inner because complete frequency division quadrature, so almost do not have interference problem, yet handle but thorny relatively in the interference at cell edge place.
The processing of among the LTE cell edge place being disturbed at present mainly contains following three kinds of methods: 1, interference randomization; 2, interference eliminated; 3, interference coordination (hiding).Yet these three kinds are disturbed processing method or can't effectively eliminate interference, or can't utilize resource fully.And utilize the transmitting antenna cooperation transmission of a plurality of sub-districts, (the CoMP of multipoint cooperative transmission just, Coordinated Multiple Point transmition andreception) technology realizes the higher capacity of cell edge place Radio Link and the emphasis that reliable transmission then becomes research.CoMP is just in order to solve a kind of effective means that the cell edge interference problem is proposed, shown in the basic principle schematic of CoMP among Fig. 1, CoMP is not only by coordinating mutually between the base station, make that the shared resource of the user terminal (as UE1) of cell edge is mutually orthogonal, also utilize the unification of a plurality of sub-districts to be target terminal user (UE, User Equipment) transmission signals, thereby effectively utilize space resources, both eliminate interference, strengthened link performance and capacity again.
In the LTE-A system that adopts the CoMP technology, UE is to channel quality indication (CQI, ChannelQuality Indication) information, pre-coding matrix indication (PMI, Precoding Matrix Indication) there is bigger difference in the feedback of information, for example: under non-CoMP pattern, UE only need to feed back and Serving cell between CQI information, and under the CoMP pattern, then might need to feed back the CQI information of different cooperation cell; Under non-CoMP pattern, UE only needs to feed back the PMI information with the Serving cell channel, and under the CoMP pattern, then might need to feed back simultaneously and Serving cell and cooperation cell between PMI information.
This shows that in the LTE-A system that adopts the CoMP technology, needing UE can discern current transmission mode still is the unicast pattern for the CoMP pattern, could carry out the reception of data according to the particular design mode of CoMP like this.Yet prior art also can't provide a kind of method of the UE of allowing identification current transmission mode, thereby makes troubles to practical application.
Summary of the invention
In view of this, main purpose of the present invention is to provide control signal processing method and the system in a kind of multipoint cooperative transmission, can't discern the problem of current transmission mode with UE in the solution prior art.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides the control signal processing method in a kind of multipoint cooperative transmission, this method comprises:
Access node is according to user's current transmission mode, and configurating downlink is controlled in the signaling in order to indicate the indication information of current transmission mode;
The descending control signaling that described access node will carry described indication information sends to user terminal UE.
After the descending control signaling that described access node will carry indication information sent to UE, this method further comprised:
Described UE receives described descending control signaling, and obtaining current transmission mode according to the indication information that reads is multipoint cooperative transmission CoMP pattern or non-CoMP pattern, and carries out the reception of data according to described CoMP pattern or non-CoMP pattern.
Described indication information is configured by set up 1 bit in described descending control signaling, perhaps is configured by set up a state in described descending control signaling, and perhaps the mode by the implicit expression notice is configured.
Described mode by the implicit expression notice is configured and is specially:
Mode by the scrambler scrambling is configured, and perhaps is configured by the mode that the form of indication information and specific descending control signaling is bound, and perhaps is configured by the running time-frequency resource position, perhaps is configured by defining different search volumes.
The mode that the indication information of the single port transmission under the described CoMP pattern in the defeated pattern of support multi-antenna transmitting, diversity transmission, Open-Loop Spatial Multiplexing, Closed-Loop Spatial Multiplexing, multi-user's multiple-input and multiple-output MIMO, closed loop rank=1 precoding, wave beam formation pattern is continued to use Long Term Evolution LTE the 8th version is configured.
Described indication information is configured in the descending control signaling of user-specific and transmits.
The present invention also provides the control signal processing system in a kind of multipoint cooperative transmission, and this system comprises: access node and user terminal, wherein,
Described access node is used for the current transmission mode according to the user, and in order to the indication information of indication current transmission mode, and the descending control signaling that will carry described indication information sends to described user terminal in the configurating downlink control signaling;
Described user terminal is used for described descending control signaling is received, and obtains described indication information wherein.
It is CoMP pattern or non-CoMP pattern that described user terminal also is used for obtaining current transmission mode according to described indication information, and carries out the reception of data according to described CoMP pattern or non-CoMP pattern.
Described access node is further used for disposing indication information by set up 1 bit in described descending control signaling, perhaps dispose indication information by set up a state in described descending control signaling, perhaps the mode by the implicit expression notice disposes indication information;
The mode of described implicit expression notice is specially: the mode of scrambler scrambling, the perhaps mode that the form of indication information and specific descending control signaling is bound, perhaps running time-frequency resource position, perhaps search volume.
Described indication information is configured in the descending control signaling of user-specific and transmits.
Control signal processing method and system in a kind of multipoint cooperative transmission provided by the present invention, by access node according to user's current transmission mode, in the configurating downlink control signaling in order to the indication information of indication current transmission mode and send to UE, make UE to discern current transmission mode, and then carry out the reception of data according to this according to indication information.
Can obtain at UE under the situation of current transmission mode, CoMP can design with flexible way more, for example designs the pilot tone and the carrier wave mapping mode of CoMP special use; And needn't be subjected to the constraint of LTE R8 system design, as the frequency displacement of LTE R8 to the constraint of CoMP design, carrier wave mapping to the constraint of CoMP design etc.
UE is after obtaining current transmission mode, promptly can carry out Data Detection and reception according to the specific send mode of CoMP, as: dedicated pilot pattern and the pilot frequency sequence of CoMP, pairing carrier wave mapping mode of CoMP and processing mode, channel estimating and CQI estimation mode etc.
Description of drawings
Fig. 1 is the basic principle schematic of CoMP in the prior art;
Fig. 2 is the flow chart of the control signal processing method in a kind of multipoint cooperative transmission of the present invention;
Fig. 3 is the composition structural representation of the control signal processing system in a kind of multipoint cooperative transmission of the present invention.
Embodiment
The technical solution of the present invention is further elaborated below in conjunction with the drawings and specific embodiments.
Control signal processing method in a kind of multipoint cooperative transmission provided by the present invention as shown in Figure 2, mainly may further comprise the steps:
Access node among the present invention is meant the access node that is used for the transmission of CoMP control signaling, can be the main Serving cell of UE, also can be base station or relay station etc.Indication information can be configured in the descending control signaling of user-specific (UE-specific) and transmit.
It is to be noted, indication information in the descending control signaling can be configured by the mode that increases by 1 bit (bit) position, and represent CoMP pattern and non-CoMP pattern respectively with the different conditions of this bit, concrete mode can be: increase by 1 bit position in the control domain of user-specific, be expressed as the CoMP pattern with " 1 ", " 0 " is expressed as non-CoMP pattern, wherein, non-CoMP pattern comprises: unicast and multimedia broadcast multi-broadcasting business single frequency network (MBSFN, Multimedia Broadcast MulticastService Single Frequency Network) transmission or the like;
Perhaps, indication information in the descending control signaling also can be configured by the mode that increases a state " X ", for example: in the control domain of user-specific, increase a state " 0011 ", when the descending control signaling of correspondence is state " 0011 ", be identified as the CoMP pattern, when for other states, be identified as non-CoMP pattern;
Perhaps, the indication information in the descending control signaling can also be configured by the mode of implicit expression notice, and available implicit expression advice method includes but not limited to following several:
A, by descending control signaling being carried out scrambling with different scramblers, a kind of concrete mode is: increase a kind of specific scrambler, cyclic redundancy check (CRC) (CRC to the exclusive descending control signaling of downlink user, Cyclical Redundancy Check) carries out scrambling with this specific scrambler, if detect this scrambler during the UE blind check, then be identified as the CoMP pattern, otherwise be identified as non-CoMP pattern;
B, the form of indication information and the descending control signaling that certain is specific is bound, concrete mode can be: with indication information and third generation partner program (3GPP, 3rd Generation PartnershipProject) the down link control information form (DCIformat, Downlink Control Information format) of definition is bound in Long Term Evolution the 8th version (LTE R8); Perhaps one or more DCI format of redetermination in LTE-A, and the DCI format and the CoMP pattern of redetermination bound, if terminal detects one or more DCI format of redetermination, then be identified as the CoMP pattern, otherwise be identified as non-CoMP pattern;
C, notify indication information by the running time-frequency resource position, concrete mode can be: the specific downlink dedicated control information resource area that indication information defines in LTE-A is transmitted, detect the control channel element (CCE that self mates as UE, Control Channel Element), and find that this CCE detects when obtaining in this specific resource area, be identified as the CoMP pattern, otherwise be identified as non-CoMP pattern;
D, notify indication information by defining different search volumes, concrete mode can be: define a kind of new search volume in order to characterize the CoMP pattern, obtain the descending control signaling of user-specific according to the search volume mode that characterizes the CoMP pattern as UE, then be identified as the CoMP pattern, otherwise be identified as non-CoMP pattern.
In addition, for the single port transmission, diversity transmission, Open-Loop Spatial Multiplexing, Closed-Loop Spatial Multiplexing, the multi-user's multiple-input and multiple-output (MIMO that support under the CoMP pattern in the defeated pattern of multiple multi-antenna transmitting, MultipleInput Multiple Output), closed loop order (rank)=1 precoding, wave beam form pattern, the notice of these patterns can be continued to use the mode of LTE R8 and indicate by DCI format.
UE is at the exclusive descending control signaling of the transmission channel search subscriber of descending control signaling, and detects.
If access node is to adopt the mode that increases the 1bit position to dispose indication information, so corresponding, UE need be at the exclusive search volume search DCI of downlink user, and the information that contracts out this bit is conciliate in detection, and then be the CoMP pattern according to the information Recognition current transmission mode of this bit, right and wrong CoMP pattern also, for example: be identified as the CoMP pattern at this bit during for " 1 ", be identified as non-CoMP pattern during for " 0 ".
If access node is to adopt the mode that increases a state " X " to dispose indication information, so corresponding, UE need be at the exclusive search volume search DCI of downlink user, and detect and unpack and obtain this state information, judge whether this state information is " X ", if then be identified as the CoMP pattern, if not then being identified as non-CoMP pattern.
If access node is to adopt different scramblers that descending control signaling is carried out scrambling to dispose indication information, so corresponding, after the bit information after UE obtains to decipher, mate with different scrambler scramblings, if it is identical that the scrambler that matches and access node are used to characterize the scrambler of CoMP pattern, then be identified as the CoMP pattern; Otherwise be identified as non-CoMP pattern.For example: access node defines a kind of specific Radio Network Temporary Identifier (RNTI, Radio Network Temporary Identifier), as CoMP-RNTI, with it descending control signaling is carried out scrambling, UE adopts different RNTI that descending control signaling is detected, when detecting successfully, then be identified as the CoMP pattern with CoMP-RNTI; Otherwise be identified as non-CoMP pattern.
If access node is when adopting the form of indication information and the descending control signaling that certain is specific to bind, so corresponding, UE judges the form of the descending control signaling that this is specific, if judge that form is identical in order to the form that characterizes the CoMP pattern with access node, then is identified as the CoMP pattern; Otherwise be identified as non-CoMP pattern.
If access node is when adopting different running time-frequency resource positions to dispose indication information, so corresponding, UE is after the user-specific search volume of descending control signaling searches corresponding descending control signaling, if the running time-frequency resource position of this descending control signaling then is identified as the CoMP pattern with identical in order to the resource location of sign CoMP pattern; Otherwise be identified as non-CoMP pattern.
If access node is when adopting different search volumes to dispose indication information, so corresponding, UE searches for according to the search volume of the signaling transmission of the search volume of common signaling transmission, user-specific with in order to the search volume that characterizes the CoMP pattern respectively, if the descending control signaling of user-specific is to obtain according to the search volume that characterizes the CoMP pattern, then be identified as the CoMP pattern; Otherwise be identified as non-CoMP pattern.
Be the control signal processing method in the multipoint cooperative transmission that realizes the invention described above, the present invention also provides the control signal processing system in a kind of multipoint cooperative transmission, and as shown in Figure 3, this system comprises: access node 10 and user terminal 20.Access node 10 is used for the current transmission mode according to the user, and in order to the indication information of indication current transmission mode, and the descending control signaling that will carry indication information sends to user terminal 20 in the configurating downlink control signaling.User terminal 20 receives descending control signaling, and obtains indication information wherein; Obtaining current transmission mode according to indication information is CoMP pattern or non-CoMP pattern, and carries out the reception of data according to CoMP pattern or non-CoMP pattern.
As a kind of preferred embodiment of the present invention, access node 10 is further used for disposing indication information by set up 1 bit in descending control signaling, perhaps dispose indication information by set up a state in descending control signaling, perhaps the mode by the implicit expression notice disposes indication information.Wherein, the mode of implicit expression notice is specially: the mode of scrambler scrambling, the perhaps mode that the form of indication information and specific descending control signaling is bound, perhaps running time-frequency resource position, perhaps search volume.
In sum, the invention solves UE in the prior art and can't discern the problem of current transmission mode, and can obtain at UE under the situation of current transmission mode, CoMP can design with flexible way more, for example designs the pilot tone and the carrier wave mapping mode of CoMP special use; And needn't be subjected to the constraint of LTE R8 system design, as the frequency displacement of LTE R8 to the constraint of CoMP design, carrier wave mapping to the constraint of CoMP design etc.UE is after obtaining current transmission mode, promptly can carry out Data Detection and reception according to the specific send mode of CoMP, as: dedicated pilot pattern and the pilot frequency sequence of CoMP, pairing carrier wave mapping mode of CoMP and processing mode, channel estimating and CQI estimation mode etc.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the control signal processing method during a multipoint cooperative transmits is characterized in that this method comprises:
Access node is according to user's current transmission mode, and configurating downlink is controlled in the signaling in order to indicate the indication information of current transmission mode;
The descending control signaling that described access node will carry described indication information sends to user terminal UE.
2. according to the control signal processing method in the transmission of the described multipoint cooperative of claim 1, it is characterized in that after the descending control signaling that described access node will carry indication information sent to UE, this method further comprised:
Described UE receives described descending control signaling, and obtaining current transmission mode according to the indication information that reads is multipoint cooperative transmission CoMP pattern or non-CoMP pattern, and carries out the reception of data according to described CoMP pattern or non-CoMP pattern.
3. according to the control signal processing method in claim 1 or the 2 described multipoint cooperative transmission, it is characterized in that, described indication information is configured by set up 1 bit in described descending control signaling, perhaps be configured by set up a state in described descending control signaling, perhaps the mode by the implicit expression notice is configured.
4. according to the control signal processing method in the described multipoint cooperative transmission of claim 3, it is characterized in that described mode by the implicit expression notice is configured and is specially:
Mode by the scrambler scrambling is configured, and perhaps is configured by the mode that the form of indication information and specific descending control signaling is bound, and perhaps is configured by the running time-frequency resource position, perhaps is configured by defining different search volumes.
5. according to the control signal processing method in claim 1 or the 2 described multipoint cooperative transmission, it is characterized in that the mode that the indication information of the single port transmission under the described CoMP pattern in the defeated pattern of support multi-antenna transmitting, diversity transmission, Open-Loop Spatial Multiplexing, Closed-Loop Spatial Multiplexing, multi-user's multiple-input and multiple-output MIMO, closed loop rank=1 precoding, wave beam formation pattern is continued to use Long Term Evolution LTE the 8th version is configured.
6. according to the control signal processing method in claim 1 or the transmission of 2 described multipoint cooperatives, it is characterized in that described indication information is configured in the descending control signaling of user-specific and transmits.
7. the control signal processing system during a multipoint cooperative transmits is characterized in that this system comprises: access node and user terminal, wherein,
Described access node is used for the current transmission mode according to the user, and in order to the indication information of indication current transmission mode, and the descending control signaling that will carry described indication information sends to described user terminal in the configurating downlink control signaling;
Described user terminal is used for described descending control signaling is received, and obtains described indication information wherein.
8. according to the control signal processing system in the described multipoint cooperative transmission of claim 7, it is characterized in that, it is CoMP pattern or non-CoMP pattern that described user terminal also is used for obtaining current transmission mode according to described indication information, and carries out the reception of data according to described CoMP pattern or non-CoMP pattern.
9. according to the control signal processing system in claim 7 or the 8 described multipoint cooperative transmission, it is characterized in that, described access node is further used for disposing indication information by set up 1 bit in described descending control signaling, perhaps dispose indication information by set up a state in described descending control signaling, perhaps the mode by the implicit expression notice disposes indication information;
The mode of described implicit expression notice is specially: the mode of scrambler scrambling, the perhaps mode that the form of indication information and specific descending control signaling is bound, perhaps running time-frequency resource position, perhaps search volume.
10. according to the control signal processing system in claim 7 or the transmission of 8 described multipoint cooperatives, it is characterized in that described indication information is configured in the descending control signaling of user-specific and transmits.
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| WO2011120473A3 (en) * | 2011-05-10 | 2012-04-05 | 华为技术有限公司 | Method, device and base station for coordinated multi-point (comp) reception processing |
| WO2012068915A1 (en) * | 2010-11-26 | 2012-05-31 | 华为技术有限公司 | Service control method and apparatus at access node |
| CN103427960A (en) * | 2012-05-14 | 2013-12-04 | 上海贝尔股份有限公司 | Multipoint coordinated information feedback method and device |
| CN103444096A (en) * | 2011-07-27 | 2013-12-11 | 富士通株式会社 | Method and device for transmitting control signaling |
| WO2013185590A1 (en) * | 2012-06-11 | 2013-12-19 | 电信科学技术研究院 | Comp transmission feedback method, device and system |
| WO2014131353A1 (en) * | 2013-02-26 | 2014-09-04 | 华为技术有限公司 | Method for transmitting downlink control information (dci) and apparatus thereof |
| CN103444096B (en) * | 2011-07-27 | 2016-11-30 | 富士通株式会社 | A kind of transmission method controlling signaling and device |
| WO2018129690A1 (en) * | 2017-01-12 | 2018-07-19 | Motorola Mobility Llc | Downlink configuration |
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| WO2019213928A1 (en) * | 2018-05-11 | 2019-11-14 | 华为技术有限公司 | Transmission scheme indication method and device |
| WO2021030954A1 (en) * | 2019-08-16 | 2021-02-25 | 华为技术有限公司 | Transmission mode determining method and apparatus |
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| CN103444096A (en) * | 2011-07-27 | 2013-12-11 | 富士通株式会社 | Method and device for transmitting control signaling |
| US9467981B2 (en) | 2011-07-27 | 2016-10-11 | Fujitsu Limited | Method and apparatus for transmitting control signaling |
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| CN103427960A (en) * | 2012-05-14 | 2013-12-04 | 上海贝尔股份有限公司 | Multipoint coordinated information feedback method and device |
| WO2013185590A1 (en) * | 2012-06-11 | 2013-12-19 | 电信科学技术研究院 | Comp transmission feedback method, device and system |
| US9363064B2 (en) | 2012-06-11 | 2016-06-07 | China Academy Of Telecommunications Technology | Comp transmission feedback method, device and system |
| WO2014131353A1 (en) * | 2013-02-26 | 2014-09-04 | 华为技术有限公司 | Method for transmitting downlink control information (dci) and apparatus thereof |
| WO2018129690A1 (en) * | 2017-01-12 | 2018-07-19 | Motorola Mobility Llc | Downlink configuration |
| WO2019213928A1 (en) * | 2018-05-11 | 2019-11-14 | 华为技术有限公司 | Transmission scheme indication method and device |
| CN113260073A (en) * | 2018-08-31 | 2021-08-13 | Oppo广东移动通信有限公司 | Method for indicating stop of transmission, terminal equipment and network equipment |
| WO2021030954A1 (en) * | 2019-08-16 | 2021-02-25 | 华为技术有限公司 | Transmission mode determining method and apparatus |
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