CN104602330B - Point-to-multipoint group service descending power indicating means - Google Patents
Point-to-multipoint group service descending power indicating means Download PDFInfo
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- CN104602330B CN104602330B CN201310524939.3A CN201310524939A CN104602330B CN 104602330 B CN104602330 B CN 104602330B CN 201310524939 A CN201310524939 A CN 201310524939A CN 104602330 B CN104602330 B CN 104602330B
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Abstract
This application discloses a kind of point-to-multipoint group service descending power indicating means, including：Network side is that the cluster group where the point-to-multipoint group service sets the exclusive parameter P of the cluster group of the cluster groupT, and pass through clustering paging message by the PTIt notifies to each colony terminal in the cluster group, the PTMeet default PTWith the exclusive parameter ρ of cluster groupG_ABetween mapping relations, the ρG_AFor distribute to the cluster group do not include reference signal（RS）Orthogonal Frequency Division Multiplexing（OFDM）Energy of the Physical Downlink Shared Channel of symbol per resource unit（PDSCH EPRE）With energy of the reference signal per resource unit（RS EPRE）Ratio；The colony terminal is according to the exclusive parameter P of the cluster group receivedTWith the PTWith the exclusive parameter ρ of cluster groupG_ABetween mapping relations, determine ρG_A, according to the ρG_AWith the exclusive ratio ρ of cell of place cellG_B/ρG_A, determine the exclusive parameter ρ of cluster groupG_B；ρG_BFor the ratio of the PDSCH EPRE and RS EPRE of the OFDM symbol comprising RS.The present invention is suitable for the group service of point-to-multipoint.
Description
Technical field
The present invention relates to mobile communication technology, more particularly to a kind of point-to-multipoint group service descending power instruction side
Method.
Background technology
Base station in LTE system（eNB）Determine the resource unit that downlink is sent（RE）Energy（EPRE）.User equipment（UE）
Assuming that the EPRE of downlink cell dedicated reference symbols is kept constant in entire downlink system bandwidth and in all subframes, until this
UE receives different community dedicated reference symbols power information.Energy of the downlink cell own reference signal per resource unit（RS
EPRE）Descending reference symbol transmission power is come from, is notified by higher level parameters reference Signal Power.For not including
Ratio, that is, ρ of the exclusive RS EPRE of PDSCH EPRE and cell in the OFDM symbol of RSA；For in the OFDM symbol comprising RS
PDSCH EPRE and the exclusive RS EPRE of cell ratio, that is, ρB, ρAAnd ρBIt is UE exclusive.
For 16QAM, 64QAM modulation or RI>The PDSCH transmission of 1 spatial multiplexing mode or MU-MIMO patterns
PDSCH transmission：
If UE receives the PDSCH data transmissions using 4 antenna ports transmission diversity, ρA=δpower-offset+PA+
10log10(2)（dB）；Otherwise, ρA=δpower-offset+PA（dB）.
Wherein, PAIt is the exclusive parameters of UE of high-rise configuration, value range is { -6, -4.77, -3, -1.77,0,1,2,3 }；
For other transmission modes in addition to downlink MU-MIMO, δpower-offsetValue is 0dB.
Can be that UE configures the exclusive parameter P of UE by high-level signaling according to the regulation of LTE protocolAWith the exclusive parameter P of cellB。
According to PBρ can be known by inquiring about relevant list with the antenna port number of eNB configurationsA/ρB, further according to ρAIt can calculate and obtain
Obtain ρB.UE may finally obtain the exclusive ρ of UEAAnd ρB, i.e. UE know the PDSCH EPRE and exclusive RS EPRE of cell ratio close
System, the data received for UE demodulation from eNode B.
TD-LTE technologies are new generation broadband mobile communication wireless access technologies, with existing 2G, 3G mobile communication system
Wireless access technology is compared, the service quality with transmission rate height, small, the high business of propagation delay time（QoS）The features such as guarantee.
In existing TD-LTE technologies, increase the characteristic of group service, realize that TD-LTE wideband digital trunked communication systems are clusters
The developing direction of communication system.
Wideband digital trunked communication system based on TD-LTE technologies can not only support TD-LTE mobile communication system certainly
Various multimedia services of body, and basic trunked call service and Cluster Multimedia business can be provided, as voice group call service,
Voice individual calling, visual group exhale, visual individual calling, broadcast ＆ call, real-time video transmission etc..
Cluster multi call business is a kind of business of point-to-multipoint, and huge effect is played in specialized communication field.In order to
It realizes cluster multi call business fast call establishment, for the characteristic of point multipoint message traffic, is changed on the basis of TD-LTE technologies
Air interface schemes increase new logic channel and transmission channel and cluster BSR MAC Control Element.It specifically includes as follows：
1st, cluster multi call downlink logical channel
1）Clustered paging control channel（TPCCH）For in the paging of point-to-multipoint, the downlink page of the UEs of a cluster group
Channel, the channel carrying group exhale paging information.
2）Clustered control channel（TCCH）The downlink letter of control information is transmitted for the UEs that point-to-multipoint is a cluster group
Road, the channel carry the control information such as trunked call is established, calling discharges, right of speech notice.
3）Group service channel（TTCH）Downlink for the UEs business transferring information that point-to-multipoint is a cluster group is believed
Road, the channel transfer cluster point multipoint message traffic data.
2nd, transmission channel
According to the characteristics of clustered paging control logic channel, increase the transmission letter of bearing cluster paging control logic channel
Road is clustered paging transmission channel（TPCH）.
3rd, the mapping relations of logic channel, transmission channel and physical channel
The mapping approach of clustered paging control channel TPCCH is TPCCH-TPCH-Physical Downlink Shared Channel
（PDSCH）；The mapping approach of clustered control channel TCCH is TCCH-downlink shared transmission channel（DL-SCH）—PDSCH；Collection
The mapping approach of group business channel TTCH is TTCH-DL-SCH-PDSCH.
Due to newly increasing above-mentioned logic channel, cluster point-to-multipoint group service carries out downlink in the form of similar broadcast
Transmission.And descending power indicating means can not meet point-to-points point set due to being only applicable to point-to-point service in above-mentioned LTE system
The application of group business needs.
The content of the invention
It in view of this, should it is a primary object of the present invention to provide point-to-multipoint group service descending power indicating means
Method is suitable for the group service of point-to-multipoint.
In order to achieve the above object, technical solution proposed by the present invention is：
A kind of point-to-multipoint group service descending power indicating means, including：
A, cluster group of the network side where the point-to-multipoint group service sets the exclusive parameter of the cluster group of the cluster group
PT, and pass through clustering paging message by the PTIt notifies to each colony terminal in the cluster group, the PTMeet default PTWith
The exclusive parameter ρ of cluster groupG_ABetween mapping relations, the ρG_AFor distribute to the cluster group do not include reference signal（RS）
Orthogonal Frequency Division Multiplexing（OFDM）Energy of the Physical Downlink Shared Channel of symbol per resource unit（PDSCH EPRE）With reference
Energy of the signal per resource unit（RS EPRE）Ratio；
B, the colony terminal is according to the exclusive parameter P of the cluster group receivedTWith the PTWith the exclusive parameter of cluster group
ρG_ABetween the mapping relations, determine the ρG_A, according to the ρG_AWith the exclusive ratio ρ of cell of place cellG_B/ρG_A,
Determine the exclusive parameter ρ of cluster groupG_B；The ρG_BFor the ratio of the PDSCH EPRE and RS EPRE of the OFDM symbol comprising RS.
In conclusion point-to-multipoint group service descending power indicating means proposed by the present invention, according to point-to-points point set
The characteristics of group business, introduces the exclusive parameter P of a cluster groupT, and the exclusive parameter P of the cluster groupTBe in units of cluster group into
Row configuration, in this way, corresponding P can be respectively configured for the demand and service feature of different cluster groupsT, so as to meet
The power configuration of different cluster group business needs, suitable for the group service of point-to-multipoint.
Description of the drawings
Fig. 1 is the flow diagram of the embodiment of the present invention one.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, it is right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in further detail.
The present invention core concept be：The characteristics of in view of point-to-multipoint group service, introduces a parameter PT, which is
Cluster group is exclusive, i.e., each UE uses same P in same cluster groupT, and the exclusive parameter P of the cluster groupTBe using cluster group as
What unit was configured, in this way, corresponding P can be respectively configured for the demand and service feature of different cluster groupsT, so as to
To meet the power configuration needs of different cluster group business, suitable for the group service of point-to-multipoint.
Fig. 1 is the flow diagram of the embodiment of the present invention one, as shown in Figure 1, the embodiment mainly includes：
The cluster group of step 101, network side where the point-to-multipoint group service sets the cluster group of the cluster group special
Belong to parameter PT, and pass through clustering paging message by the PTIt notifies to each colony terminal in the cluster group, the PTMeet default
PTWith the exclusive parameter ρ of cluster groupG_ABetween mapping relations, the ρG_AThe reference that do not include to distribute to the cluster group is believed
Number（RS）Orthogonal Frequency Division Multiplexing（OFDM）Energy of the Physical Downlink Shared Channel of symbol per resource unit（PDSCH EPRE）
With energy of the reference signal per resource unit（RS EPRE）Ratio.
This step, for carrying out the cluster group that the cluster group of point-to-multipoint group service configures the cluster group by network side
Exclusive parameter PT, in this way, the exclusive parameter P of different cluster groups can be needed to set for different group servicesT。
Here, the PTMeet default PTWith the exclusive parameter ρ of cluster groupG_ABetween mapping relations, the ρG_AFor distribution
To the ratio of the PDSCH EPRE and RS EPRE of the OFDM symbol not comprising RS of the cluster group.
It should be noted that in practical applications, the descending power size of cluster group is by parameter PT, the exclusive parameter of cell
PBIt is codetermined with downlink reference signal power.PBIt is cell-level parameter with downlink reference signal power.Due to PTValue and ρG_A
Between will meet a mapping relations, therefore PTValue reflects the PDSCH in the OFDM symbol not comprising RS for distributing to cluster group
The ratio of EPRE and the exclusive RS EPRE of cell（That is ρG_A）.In this way, terminal can be according to the P notifiedTAnd the mapping is closed
It is to obtain corresponding ρG_A, and then terminal can carry out the demodulation of downlink reception data accordingly thereafter.
In practical applications, those skilled in the art can set P according to actual needsTWith the exclusive parameter ρ of cluster groupG_A
Between mapping relations, preferably, the mapping relations can be arranged to piece ρG_A=α*PT+ β, wherein α for default ratio because
Sub- α ＞ 0, β are default adjusting parameter.
The α and β can according to actual needs be set by those skilled in the art, for the sake of simplicity, α=1 can be made, β=0, and ρ at this timeG_A
=PT, but above-mentioned functional relation is not limited to, as long as meeting actual needs.
Step 102, the colony terminal are according to the exclusive parameter P of the cluster group receivedTWith the PTIt is special with cluster group
Belong to parameter ρG_ABetween mapping relations, determine the ρG_A, according to the ρG_AWith the exclusive ratio ρ of cell of place cellG_B/
ρG_A, determine the exclusive parameter ρ of cluster groupG_B；The ρG_BFor the ratio of PDSCH EPRE and the RS EPRE of the OFDM symbol comprising RS
Value.
This step is used to implement colony terminal to power-related parameter ρG_AAnd ρG_BDetermine, so as to complete point-to-points point set
The instruction of group business descending power.It should be noted that according to existing system, some OFDM symbols include RS, some OFDM symbols
Number RS is not included, PDSCH EPRE will be different in the case of two kinds, therefore, need exist for distinguishing both of these case and set respectively not
Same power-related parameter, that is, ρG_AAnd ρG_B。
In this step, colony terminal can be according to the P receivedTAnd PTWith the exclusive parameter ρ of cluster groupG_ABetween mapping
Relation determines corresponding ρG_A。
It it is preferred that can be according to the uplink/downlink antenna port number of cell and the exclusive parameter P of the cell of the default cellB, look into
It askes default mapping table and obtains the ratio ρ in above formulaG_B/ρG_A.The PBFor the exclusive parameter of cell of system, network side is to the value
It is specific set compared with system, details are not described herein.
Need exist for explanation, the exclusive parameter P of cellBEach value and cell downlink antenna port number in value range
Various combinations all will be there are one the exclusive ratio ρ of cellG_B/ρG_ACorresponding, these correspondences will be preserved by a mapping table
In network side and terminal.In this way, colony terminal can be according to the mapping table and current antenna in cell port number and cell
Parameter PBFind out the corresponding exclusive ratio ρ of cellG_B/ρG_A, therefore, terminal can be according to ρ in subsequent stepG_AAnd lookup
The exclusive ratio ρ of cell gone outG_B/ρG_AKnow the exclusive ρ of corresponding cluster groupG_B, refer to so as to fulfill group service descending power
Show.
Wherein, the mapping table may be employed the mode of the following table 1 and realize：
Table 1
In above-mentioned table, the N be uplink/downlink antenna port number, the PBFor the exclusive parameter of cell.
It specifically, can be according to ρG_B=ρG_A·(ρG_B/ρG_A), the ρ is calculatedG_B。
Colony terminal can be made to know that point-to-multipoint group service carries out using the above program used during downlink transfer
Power-related parameter ρG_AAnd ρG_B, so as to be demodulated accordingly to the downlink group service data received.
In conclusion the foregoing is merely a prefered embodiment of the invention, it is not intended to limit the scope of the present invention.
Within the spirit and principles of the invention, any modifications, equivalent replacements and improvements are made should be included in the present invention's
Within protection domain.
Claims (4)
1. a kind of point-to-multipoint group service descending power indicating means, which is characterized in that including：
A, cluster group of the network side where the point-to-multipoint group service sets the exclusive parameter P of the cluster group of the cluster groupT, and
By clustering paging message by the PTIt notifies to each colony terminal in the cluster group, the PTMeet default PTWith cluster
The exclusive parameter ρ of groupG_ABetween mapping relations, the ρG_ATo distribute to the orthogonal not comprising reference signal RS of the cluster group
Energy PDSCH EPRE of the Physical Downlink Shared Channel of frequency division multiplex OFDM symbol per resource unit is with reference signal per resource
The ratio of the energy RS EPRE of unit；
B, the colony terminal is according to the PTWith the exclusive parameter ρ of cluster groupG_ABetween mapping relations and the collection that receives
The exclusive parameter P of groupT, determine the ρG_A, according to the ρG_AWith the exclusive ratio ρ of cell of place cellG_B/ρG_A, determine collection
The exclusive parameter ρ of groupG_B；The ρG_BFor the ratio of the PDSCH EPRE and RS EPRE of the OFDM symbol comprising RS.
2. the according to the method described in claim 1, it is characterized in that, PTWith the exclusive parameter ρ of cluster groupG_ABetween mapping close
It is for ρα_A=α * Pr+ β, wherein, α is default scale factor, and β is default adjusting parameter.
3. according to the method described in claim 1, it is characterized in that, according to ρ in the bG_B=ρG_A·(ρG_B/ρG_A), it calculates
Obtain the ρG_B。
4. according to the method described in claim 1, it is characterized in that, the b further comprises：
According to the uplink/downlink antenna port number of the cell and the exclusive parameter of cell of the default cell, default mapping is inquired about
Table obtains the ρG_B/ρG_A；Wherein, the mapping table is：
The N be uplink/downlink antenna port number, the PBFor the exclusive parameter of cell.
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| KR20070010597A (en) * | 2005-07-19 | 2007-01-24 | 삼성전자주식회사 | Method for allocation downlink resource in a wideband wireless access communication system |
| CN101023598A (en) * | 2004-07-21 | 2007-08-22 | 高通股份有限公司 | Shared signaling channel for a communication system |
| CN101911792A (en) * | 2008-01-07 | 2010-12-08 | 三星电子株式会社 | Methods and apparatus for downlink PDSCH power setting |
| CN102255689A (en) * | 2011-07-08 | 2011-11-23 | 中兴通讯股份有限公司 | Method, device and system for processing channel state information (CSI) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101023598A (en) * | 2004-07-21 | 2007-08-22 | 高通股份有限公司 | Shared signaling channel for a communication system |
| KR20070010597A (en) * | 2005-07-19 | 2007-01-24 | 삼성전자주식회사 | Method for allocation downlink resource in a wideband wireless access communication system |
| CN101911792A (en) * | 2008-01-07 | 2010-12-08 | 三星电子株式会社 | Methods and apparatus for downlink PDSCH power setting |
| CN102255689A (en) * | 2011-07-08 | 2011-11-23 | 中兴通讯股份有限公司 | Method, device and system for processing channel state information (CSI) |
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