CN105763304B - A kind of extended method of the supported maximum antenna port number of CSI-RS - Google Patents
A kind of extended method of the supported maximum antenna port number of CSI-RS Download PDFInfo
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Abstract
The present invention proposes a kind of extended method of the supported maximum antenna port number of CSI-RS in LTE system, this method are as follows: is except port numbers outside 8 ports of P=15,16......, 22, then chooses 8 × k port as the supported antenna port of CSI-RS；By 8 ports that port numbers are P=15,16......, 22 as former port set, every 8 ports are as a new port set in 8 × k port；8 ports in 8 ports and former port set in each new port set, which correspond, uses identical RE resource, and all of the port of each port set uses identical CSI-RS subframe configuration information, and the CSI-RS subframe configuration information of each port set is different.The present invention not only extends port number, but also improves RE resource utilization.
Description
Technical field
The present invention relates to a kind of extension sides of the supported maximum port number in LTE communication field more particularly to CSI-RS
Method.
Background technique
Advanced long-term evolution system (Long-Term Evolution advance, abbreviation LTE-Advance) defines two
Kind pilot tone, i.e. channel state information reference signals (Channel State Information-Reference Signals, letter
Claim CSI-RS) and demodulated reference signal (Demodulation Reference Signals, abbreviation DMRS).CSI-RS maximum can
Support 8 antenna ports, port numbers are as follows: P=15,16......, 22.Multiple UE share downlink CSI-RS in cell, and base station is given
The configuration informations such as port number, resource location, sub-frame configuration and the power bias of each UE distribution CSI-RS, then according to this
A little configuration informations periodically send CSI-RS to UE.Wherein, base station is by sub-frame configuration parameter ICSI-RSIt is distributed to each UE
The subframe configuration information of CSI-RS, UE receive ICSI-RSI is found according to CSI-RS sub-frame configuration table shown in FIG. 1 afterwardsCSI-RSIt is corresponding
CSI-RS sending cycle TCSI-RSWith sub-frame offset ΔCSI-RS, according to TCSI-RSAnd ΔCSI-RSPeriodic receipt CSI-RS.
CSI-RS is only capable of supporting maximum 8 antenna ports in the prior art.And in third generation partner program (3rd
Generation Partnership Project, abbreviation 3GPP) how defeated be directed to full dimension multi input in LTE65 meeting
Technology (Full-Dimension MIMO, abbreviation FD-MIMO) is set up the project out, for studying the wave beam for supporting vertical plane and horizontal plane
Forming.In such multi-dimensional antenna array scene, each Transmit-Receive Unit can be carried out independent amplitude and phase control,
Terminal needs to obtain the channel state information of each latitude direction (including horizontal direction, vertical direction etc.), it is clear that it is existing most
Big 8 antenna ports are unable to meet demand, need to be extended the supported maximum antenna port number of CSI-RS.
Summary of the invention
In order to solve the above-mentioned technical problem, the present invention proposes a kind of expansion of supported maximum antenna port number of CSI-RS
Exhibition method, the method are as follows:
It is except port numbers outside 8 ports of P=15,16......, 22, then chooses 8 × k port and can be propped up as CSI-RS
The antenna port held, k are positive integer；
By 8 ports that port numbers are P=15,16......, 22 as former port set, every 8 in the 8 × k port
A port shares k new port sets as a new port set；
8 ports in 8 ports and former port set in each new port set, which correspond, uses identical RE resource,
The all of the port of each port set uses identical CSI-RS subframe configuration information, and the CSI-RS sub-frame configuration of each port set is believed
Cease different, the CSI-RS subframe configuration information includes the sending cycle and sub-frame offset of CSI-RS.
Preferably, the CSI-RS sub-frame configuration parameter of the port set where being allocated to the port of UE is sent to UE by base station,
UE based on the received each port set CSI-RS sub-frame configuration parameter search CSI-RS sub-frame configuration table, obtain each port set
CSI-RS subframe configuration information.
Preferably, base station is only by the CSI-RS sub-frame configuration parameter I of former port setCSI-RSIt is sent to UE, UE passes through after receiving
Pre-set computation rule is by ICSI-RSThe subframe configuration information of k new port sets is obtained, it can be using following three kinds specific meters
Calculate rule:
First, searching sub-frame configuration table obtains ICSI-RSIntegral multiple numerical value corresponding to sending cycle T 'CSI-RSAnd subframe
Bias Δ 'CSI-RS, the integral multiple is greater than k, then the CSI-RS sending cycle of the k new port sets is T 'CSI-RS, the k
The CSI-RS sub-frame offset of a new port set be followed successively by Δ 'CSI-RS, Δ 'CSI-RS+[T′CSI-RS/ (K+1)], Δ 'CSI-RS+[2×
T′CSI-RS/ (K+1)] ..., Δ 'CSI-RS+[(K-1)×T′CSI-RS/(K+1)]。
Second, the CSI-RS sub-frame configuration parameter for calculating k new port sets is followed successively by ICSI-RS+δ1, ICSI-RS+
δ2..., ICSI-RSδk, δ1, δ2..., δkFor preset value, matched according to the CSI-RS subframe of calculated k new port sets
It sets parameter and searches CSI-RS sub-frame configuration table, obtain the CSI-RS subframe configuration information of k new port sets.It is further preferred that
δ1=α, δ2=2 α ..., δ k=k × α, wherein α is preset value.
Third, searching sub-frame configuration table obtains ICSI-RSCorresponding sending cycle TCSI-RSWith sub-frame offset ΔCSI-RS, then
The CSI-RS sending cycle of the k new port sets is followed successively by C1×TCSI-RS, C2×TCSI-RS... Ck×TCSI-RS, the k
The CSI-RS sub-frame offset of a new port set is followed successively by ΔCSI-RS+Q1, ΔCSI-RS+Q2..., ΔCSI-RS+Qk, wherein C1, C2,
......CkTo preset integer value, Q1, Q2... QkFor pre-set constant value.
It is further preferred that the C1, C2... CkValue is identical,
Q2=Q1+[C1×TCSI-RS/ (K+1)],
Q3=Q1+[C1×2×TCSI-RS/ (K+1)] ...,
Qk=Q1+[(k-1)×C1×TCSI-RS/(K+1)]。
In addition it is further preferred that the C1, C2... CkAnd Q1, Q2... QkValue by base station dynamic adjust
It is whole.
In the above method, k can any value, it is preferred that k value is 1,3 or 7.
Method provided by the invention not only extends port number, but also improves RE resource utilization.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the CSI-RS sub-frame configuration table figure of background technique；
Fig. 2 is the Relation Parameters allocation list figure of the embodiment of the present invention five.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments；It should be noted that in the absence of conflict, in the application
Embodiment and embodiment in feature can be combined with each other.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
CSI-RS maximum can support 8 antenna ports, port numbers P=15,16......, 22 in the prior art.This 8
Port occupies 8 RE resources altogether, to extend the supported port number of CSI, from the point of view of efficiently utilizing resource, one
The feasible approach of kind is the RE resource that ECP Extended Capabilities Port is multiplexed former port, the basic idea of the invention is that passing through the original port that is time-multiplexed
The mode of RE resource extends the supported maximum antenna port number of CSI.Following example with port number expand to 16,
32, for 64 several situation typicals, illustrate the content of present invention.
Embodiment one
The supported maximum antenna port number of CSI is expanded to 16 by 8 by the present embodiment.Except port numbers are P=15,
16......, outside 22 8 ports, then 8 ports are chosen as the supported antenna port of CSI-RS, 8 ends newly chosen
Slogan is denoted as P=u1, u2..., u8。
By port P=15,16......, 22 as former port set, P=u1, u2..., u8As new port set.Newly
8 ports of port set and 8 ports of former port set correspond and occupy identical RE resource, i.e. port u1RE resource with
The RE resource of port 15 is identical, port u2RE resource it is identical as the RE resource of port 16, and so on, port u8RE resource
It is identical as the RE resource of port 22.The all of the port of each port set using identical CSI-RS subframe configuration information (including
The sending cycle and sub-frame offset of CSI-RS), but the not phase of the CSI-RS subframe configuration information of new port set and former port set
Together, the identical port of resource can be thus distinguished by different subframe configuration informations, thus by supported most big end
Mouth number expands to 16.
Assuming that base station is configured with 10 ports to UE altogether, port numbers are=15,16......, 22, u1, u2.Then base station is distinguished
Respectively dedicated CSI-RS sub-frame configuration parameter is configured to former port set and new port set, and is sent to UE.UE is searched after receiving
The table of CSI-RS sub-frame configuration shown in Fig. 1 obtains port P=15,16......, 22 according to the sub-frame configuration parameter of former port set
Sending cycle and sub-frame offset obtain port P=u according to the sub-frame configuration parameter of new port set1, u2Sending cycle and subframe
Biasing.
Embodiment two
The supported maximum antenna port number of CSI is expanded to 32 by 8 by the present embodiment.Except port numbers are P=15,
16......, outside 22 8 ports, then 24 ports are chosen as the supported antenna port of CSI-RS, 24 newly chosen
Port numbers are denoted as P=u1, u2..., u24。
By port P=15,16......, 22 as former port set, P=u1, u2..., u24In successively 8 ports make
For a new port set, 3 new port sets are shared.8 ports of each new port set and 8 ports one of former port set are a pair of
Identical RE resource, i.e. port u should be occupied1、u9、u17RE resource it is identical as the RE resource of port 15, port u2、u10、u18's
RE resource is identical as the RE resource of port 16, and so on, port u8、u16、u24RE resource it is identical as the RE resource of port 22.
(sending cycle and subframe including CSI-RS are inclined using identical CSI-RS subframe configuration information for all of the port of each port set
Set), but the CSI-RS subframe configuration information of each new port set and former port set is different, can thus pass through difference
Subframe configuration information distinguish the identical port of resource, so that supported maximum port number is expanded to 32.
Base station is only by the sub-frame configuration parameter I of former port set P=15,16......, 22 in the present embodimentCSI-RSIt is sent to
UE, UE pass through pre-set computation rule by I after receivingCSI-RSObtain the subframe configuration information of 3 new port sets.It says below
Bright specific calculating process.
UE calculates former port set sub-frame configuration parameter I firstCSI-RSN multiple value (N be integer) greater than 3, then search
Sub-frame configuration table obtains the corresponding sending cycle T ' of the multiple valueCSI-RSWith sub-frame offset Δ 'CSI-RS, then 3 new port sets
Subframe configuration information is successively as follows:
P=u1, u2..., u8The sending cycle of port is T 'CSI-RS, sub-frame offset be Δ 'CSI-RS；
P=u9, u10..., u16The sending cycle of port is T 'CSI-RS, sub-frame offset be Δ 'CSI-RS+T′CSI-RS/4；
P=u17, u18..., u24The sending cycle of port is T 'CSI-RS, sub-frame offset be Δ 'CSI-RS+2×T
′CSI-RS/4。
Embodiment three
The present embodiment will the supported maximum antenna port number of CSI by 8 expand to 32.Except port numbers are P=
Outside 15,16......, 22 8 ports, then choose 24 ports as the supported antenna port of CSI-RS, 24 newly chosen
A port numbers are denoted as P=u1, u2..., u24。
With embodiment two, by port P=15,16......, 22 as former port set, P=u1, u2..., u24According to
Secondary 8 ports share 3 new port sets as a new port set.8 ports of each new port set and the 8 of former port set
A port, which corresponds, occupies identical RE resource.The all of the port of each port set is believed using identical CSI-RS sub-frame configuration
Breath, but the CSI-RS subframe configuration information of each new port set and former port set is different, can thus pass through difference
Subframe configuration information distinguish the identical port of resource, so that supported maximum port number is expanded to 32.
Base station is still only by the sub-frame configuration parameter I of former port set P=15,16......, 22 in the present embodimentCSI-RSHair
UE is given, UE passes through pre-set computation rule by I after receivingCSI-RSObtain the subframe configuration information of 3 new port sets.This
The computation rule of embodiment is different from embodiment two, illustrates specific calculating process below.
UE is first by former port set sub-frame configuration parameter ICSI-RSCalculate the sub-frame configuration parameter of 3 new port sets, P=u1,
u2..., u8, P=u9, u10..., u16, P=u17, u18..., u24Sub-frame configuration parameter be successively calculated as
ICSI-RS+δ1, ICSI-RS+δ2, ICSI-RS+δ2, δ here1, δ2, δ2It is the pre-set numerical value of system.In order to simplify system ginseng
Number setting, the present embodiment use δ1=α, δ2=2 α, δk=3 α, such system is just only with this numerical value of preset α.
Then UE searches CSI-RS sub-frame configuration table according to the sub-frame configuration parameter of calculated 3 new port sets, respectively
Obtain the sending cycle and sub-frame offset of this 3 new port sets.
Example IV
The supported maximum antenna port number of CSI is expanded to 64 by 8 by the present embodiment.Except port numbers are P=15,
16......, outside 22 8 ports, then 56 ports are chosen as the supported antenna port of CSI-RS, 56 newly chosen
Port numbers are denoted as P=u1, u2..., u56。
By port P=15,16......, 22 as former port set, P=u1, u2..., u56In successively 8 ports make
For a new port set, 7 new port sets are shared.8 ports of each new port set and 8 ports one of former port set are a pair of
Identical RE resource, i.e. port u should be occupied1、u9、u17、u25、u32、u41、u49RE resource it is identical as the RE resource of port 15, end
Mouth u2、u10、u18、u26、u34、u42、u30RE resource it is identical as the RE resource of port 16, and so on, port u8、u16、u24、
u32、u40、u48、u36RE resource it is identical as the RE resource of port 22.The all of the port of each port set uses identical CSI-RS
Subframe configuration information (sending cycle and sub-frame offset including CSI-RS), but the CSI- of each new port set and former port set
RS subframe configuration information is different, and the identical port of resource can be thus distinguished by different subframe configuration informations,
To which supported maximum port number is expanded to 64.
Base station is only by the sub-frame configuration parameter I of former port set P=15,16......, 22 in the present embodimentCSI-RSIt is sent to
UE, UE search sub-frame configuration table and obtain sending cycle T corresponding to former port set sub-frame configuration parameter ICSI-RSCSI-RSAnd subframe
Bias ΔCSI-RS.For each new port set, the sending cycle of an expression the port group is pre-set relative to former port
The integer value of the multiple of the sending cycle of group, is successively denoted as C1, C2... C7, also pre-set an expression the port group
Sub-frame offset relative to former port set sub-frame offset offset constant value, be successively denoted as Q1, Q2... Q7.Then UE is counted
The CSI-RS sending cycle for calculating 7 new port sets is followed successively by C1×TCSI-RS, C2×TCSI-RS... C7×TCSI-RS, 7 new ends
The CSI-RS sub-frame offset of mouth group is followed successively by ΔCSI-RS+Q1, ΔCSI-RS+Q2..., ΔCSI-RS+Q7。
C is arranged in the present embodiment1, C2... C7Value is identical, is C1, then the CSI-RS of 7 new port sets sends week
Phase is TCSI-RS=C1×TCSI-RS.Q is arranged in the present embodiment1, Q2... Q7For arithmetic progression, each value is than previous value
Big T 'CSI-RS/8.The sub-frame offset of i.e. 7 new port sets is successively as follows:
P=u1, u2..., u8The sub-frame offset of port is ΔCSI-RS+Q1；
P=u9, u10..., u16The sub-frame offset of port is ΔCSI-RS+Q1+T′CSI-RS/8；
P=u17, u18..., u24The sub-frame offset of port is ΔCSI-RS+Q1+2T′CSI-RS/8；
P=u25, u26..., u32The sub-frame offset of port is ΔCSI-RS+Q1+3T′CSI-RS/8；
P=u33, u34..., u40The sub-frame offset of port is ΔCSI-RS+Q1+4T′CSI-RS/8；
P=u41, u42..., u48The sub-frame offset of port is ΔCSI-RS+Q1+5T′CSI-RS/8；
P=u49, u50..., u56The sub-frame offset of port is ΔCSI-RS+Q1+6T′CSI-RS/8。
Embodiment five
The present embodiment will the supported maximum antenna port number of CSI by 8 expand to 64.The present embodiment and implementation
Example four is identical to be, base station is by the sub-frame configuration parameter I of former port setCSI-RSIt is sent to UE, by I after UE receptionCSI-RSAnd it is every
The C and Q of a new port set obtain the subframe configuration information of each new port set.The present embodiment is unlike example IV: real
The C and Q for applying each port set in example four are pre-set fixed value, and the C and Q of each port set can be by the present embodiment
Base station dynamic adjusts, and is described as follows:
Sub-frame configuration parameter I of the base station in addition to sending former port set to UECSI-RS, for each new port set, also send one
A dedicated sub-frame configuration Relation Parameters GCSI-RS, UE reception GCSI-RSAfterwards according to Relation Parameters allocation list shown in Fig. 2, this is found
The C and Q of port set.When base station will adjust the value of the C and Q of single new port set, it is only necessary to adjust the new port set
GCSI-RSValue and be sent to UE.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: ROM, RAM, magnetic disk or light
The various media that can store program code such as disk.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
- The extended method of the supported maximum antenna port number of CSI-RS in 1.LTE system, which is characterized in that the method Are as follows:It is except port numbers outside 8 ports of P=15,16......, 22, then to choose 8 × k port supported as CSI-RS Antenna port, k are positive integer；By 8 ports that port numbers are P=15,16......, 22 as former port set, held for every 8 in the 8 × k port Mouth is used as a new port set, shares k new port sets；8 ports in 8 ports and former port set in each new port set, which correspond, uses identical RE resource, each The all of the port of port set uses identical CSI-RS subframe configuration information, and the CSI-RS subframe configuration information of each port set is mutual Not identical, the CSI-RS subframe configuration information includes the sending cycle and sub-frame offset of CSI-RS；Base station is only by the CSI-RS sub-frame configuration parameter I of former port setCSI-RSIt is sent to UE, UE passes through pre-set after receiving Computation rule is by ICSI-RSObtain the subframe configuration information of k new port sets.
- 2. according to the method described in claim 1, it is characterized by:The CSI-RS sub-frame configuration parameter of port set where being allocated to the port of UE is sent to UE by base station, and UE is based on the received The CSI-RS sub-frame configuration parameter of each port set searches CSI-RS sub-frame configuration table, obtains the CSI-RS subframe of each port set Configuration information.
- 3. the method according to claim 1, wherein by pre-set computation rule by ICSI-RSObtain k The subframe configuration information of new port set specifically:It searches sub-frame configuration table and obtains ICSI-RSIntegral multiple numerical value corresponding to sending cycle T 'CSI-RSAnd sub-frame offset Δ′CSI-RS, the integral multiple is greater than k, then the CSI-RS sending cycle of the k new port sets is T 'CSI-RS, the k new The CSI-RS sub-frame offset of port set be followed successively by Δ 'CSI-RS, Δ 'CSI-RS+[T′CSI-RS/ (k+1)], Δ 'CSI-RS+[2×T ′CSI-RS/ (k+1)] ... ..., Δ 'CSI-RS+[(k-1)×T′CSI-RS/(k+1)]。
- 4. according to the method described in claim 1, it is characterized by: by pre-set computation rule by ICSI-RSObtain k The subframe configuration information of new port set specifically:The CSI-RS sub-frame configuration parameter for calculating k new port sets is followed successively by ICSI-RS+δ1, ICSI-RS+δ2... ..., ICSI-RS+δk, δ1, δ2... ..., δkFor preset value, CSI-RS is searched according to the CSI-RS sub-frame configuration parameter of calculated k new port sets Frame allocation list obtains the CSI-RS subframe configuration information of k new port sets.
- 5. according to the method described in claim 4, it is characterized by:δ1=α, δ2=2 α ... ..., δk=k × α, wherein α is preset value.
- 6. according to the method described in claim 1, it is characterized by: by pre-set computation rule by ICSI-RS obtains k The subframe configuration information of new port set specifically:It searches sub-frame configuration table and obtains ICSI-RSCorresponding sending cycle TCSI-RSWith sub-frame offset ΔCSI-RS, then the k is a new The CSI-RS sending cycle of port set is followed successively by C1×TCSI-RS, C2×TCSI-RS... ... Ck×TCSI-RS, the k new port sets CSI-RS sub-frame offset be followed successively by ΔCSI-RS+Q1, ΔCSI-RS+Q2... ..., ΔCSI-RS+Qk, wherein C1, C2... ... CkIt is default Integer value, Q1, Q2... ... QkFor pre-set constant value.
- 7. according to the method described in claim 6, it is characterized by: the C1, C2... ... CkValue is identical, Q2=Q1+[C1× TCSI-RS/ (k+1)],Q3=Q1+[2×C1×TCSI-RS/ (k+1)] ... ...,Qk=Q1+[(k-1)×C1×TCSI-RS/(k+1)]。
- 8. according to the method described in claim 6, it is characterized by: the C1, C2... ... CkAnd Q1, Q2... ... QkValue by Base station dynamic adjusts.
- 9. method described in any one according to claim 1~7, it is characterised in that: k value is 1,3 or 7.
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| CN101877865A (en) * | 2009-04-30 | 2010-11-03 | 中兴通讯股份有限公司 | Method and system for sending measurement reference signal, base station and relay station |
| CN102378379A (en) * | 2010-08-13 | 2012-03-14 | 电信科学技术研究院 | Channel state indication reference signal (CSI-RS) initial position configuration and indication method, CSI-RS receiving method, network-side equipment and terminal |
| CN103944685A (en) * | 2013-01-18 | 2014-07-23 | 华为技术有限公司 | Method, equipment and communication system for extending reference signal |
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| KR101790505B1 (en) * | 2010-06-01 | 2017-11-21 | 주식회사 골드피크이노베이션즈 | Apparatus and Method for allocating Channel State Information-Reference Signal dependent on Subframe Configuration in wireless communication |
| US9054842B2 (en) * | 2011-02-14 | 2015-06-09 | Qualcomm Incorporated | CRS (common reference signal) and CSI-RS (channel state information reference signal) transmission for remote radio heads (RRHs) |
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| CN101877865A (en) * | 2009-04-30 | 2010-11-03 | 中兴通讯股份有限公司 | Method and system for sending measurement reference signal, base station and relay station |
| CN102378379A (en) * | 2010-08-13 | 2012-03-14 | 电信科学技术研究院 | Channel state indication reference signal (CSI-RS) initial position configuration and indication method, CSI-RS receiving method, network-side equipment and terminal |
| CN103944685A (en) * | 2013-01-18 | 2014-07-23 | 华为技术有限公司 | Method, equipment and communication system for extending reference signal |
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