CN105790905A - Transmitting method of downlink CSI-RS (Channel State Information-Reference Signal), device and system - Google Patents
Transmitting method of downlink CSI-RS (Channel State Information-Reference Signal), device and system Download PDFInfo
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Abstract
The invention provides a transmitting method of a downlink CSI-RS (Channel State Information-Reference Signal). The transmitting method comprises the following steps of a, independently distributing special non-periodic CSI-RS configuration information, including, port number of the non-periodic CSI-RS, sub-frame configuration, resource position and power offset information, to UE by a base station; b, transmitting a non-periodic CSI-RS triggering indicator to the UE by the base station and then transmitting the non-periodic CSI-RS to the UE by using the special non-periodic CSI-RS configuration information; and c, after receiving the non-periodic CSI-RS triggering indicator by the UE, receiving the non-periodic CSI-RS by using the special non-periodic CSI-RS configuration information. The invention also provides a corresponding base station device, a UE device and a system. According to the invention, special CSI-RS scheduling of single UE is realized by adopting a signaling triggering mode, and resources can be utilized more reasonably.
Description
Technical field
The present invention relates to LTE communication field, particularly relate to the sending method of downlink channel condition information reference signal, device and system.
Background technology
Advanced long-term evolution system (Long-TermEvolutionadvance, it is called for short LTE-Advance) define two kinds of pilot tones, i.e. channel state information reference signals (ChannelStateInformation-ReferenceSignals, it is called for short CSI-RS) and demodulated reference signal (DemodulationReferenceSignals is called for short DMRS).In community, multiple UE share descending CSI-RS, and base station distributes the configuration informations such as the port number of CSI-RS, resource location, sub-frame configuration and power bias to each UE, then according to these configuration informations periodically send CSI-RS to UE.Wherein, base station is by sub-frame configuration parameter ICSI-RSDistribute the subframe configuration information of CSI-RS to each UE, UE receives ICSI-RSAfter CSI-RS sub-frame configuration table shown in Fig. 1 find ICSI-RSCorresponding CSI-RS sends cycle TCSI-RSWith sub-frame offset ΔCSI-RS, according to TCSI-RSAnd ΔCSI-RSPeriodic receipt CSI-RS.
In above-mentioned existing CSI-RS sending method, in community, multiple UE share CSI-RS, and base station needs periodically to send CSI-RS, UE to multiple UE and is also required to periodically receive CSI-RS, there is significant wastage in the utilization of resources.Therefore, it is intended that propose a kind of can for the aperiodic CSI-RS sending method of single UE, thus being more reasonably utilized resource.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention proposes the sending method of a kind of new downlink channel condition information reference signal, said method comprising the steps of:
A, special CSI-RS configuration information aperiodic is individually distributed in base station to UE, including the port number of CSI-RS aperiodic, sub-frame configuration, resource location and power offset information；
B, base station sends CSI-RS triggering instruction aperiodic to UE, then uses described special CSI-RS configuration information aperiodic to send CSI-RS aperiodic to UE；
After c, UE receive CSI-RS triggering instruction aperiodic, described special CSI-RS configuration information aperiodic is used to receive CSI-RS aperiodic.
Preferably, in step a, base station utilizes sub-frame configuration parameter ICSI-RSSubframe configuration information to UE distribution CSI-RS described aperiodic.
Preferably, described special CSI-RS configuration information aperiodic also includes the transmission times of CSI-RS aperiodic and sends interval；Base station uses described special CSI-RS configuration information aperiodic to send repeatedly CSI-RS aperiodic to UE；UE uses described special CSI-RS configuration information aperiodic to receive repeatedly CSI-RS aperiodic.It is further preferred that base station utilizes sub-frame configuration parameter I in step aCSI-RSTo the subframe configuration information of UE distribution CSI-RS described aperiodic and transmission interval.
Preferably, in step b, base station sends CSI-RS triggering instruction aperiodic by down control channel PDCCH to UE.
Preferably, described CSI-RS triggering aperiodic is designated as 1bit character.
Preferably, described CSI-RS triggering aperiodic is designated as 2bit character.It is further preferred that described 2bit character has 00,01,10,11 4 kind of combination, one of which combination represents cycle CSI-RS nothing but, and other three kinds are combined as aperiodic CSI-RS and trigger instruction and indicate respectively CSI-RS configuration information a set of aperiodic.
Preferably, in the methodical step b of above-mentioned institute, base station only sends CSI-RS aperiodic on the dispatching downlink PRB of UE receiving CSI-RS aperiodic.
The invention allows for a kind of base station apparatus, described device include special aperiodic CSI-RS configure module, aperiodic CSI-RS trigger instruction generation module, aperiodic CSI-RS generation module and sending module, wherein:
Described special CSI-RS configuration aperiodic module, for individually distributing special CSI-RS configuration information aperiodic to UE；
Described CSI-RS triggering aperiodic instruction generation module, is used for generating CSI-RS triggering instruction aperiodic；
Described aperiodic, CSI-RS generation module, was used for generating CSI-RS aperiodic；
Described sending module, for sending CSI-RS triggering instruction aperiodic to UE, and uses CSI-RS configuration information aperiodic special for UE to send CSI-RS aperiodic to UE.
The invention allows for a kind of UE device, described device include CSI-RS memory module special aperiodic, aperiodic CSI-RS trigger instruction judge module, aperiodic CSI-RS detection module, wherein:
Described special aperiodic CSI-RS memory module, for preserving special CSI-RS configuration information aperiodic that base station is self distribution；
Described CSI-RS triggering aperiodic instruction judge module, is used for judging whether to receive CSI-RS triggering instruction aperiodic；
Described aperiodic CSI-RS receiver module, for using self special CSI-RS configuration information aperiodic to receive CSI-RS aperiodic.
The invention allows for a kind of system comprising above-mentioned base station apparatus and UE device.
The invention provides the sending method of CSI-RS a kind of aperiodic, the method adopts the mode that signaling triggers to realize CSI-RS scheduling special for single UE, it is possible to more make rational use of resources.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the sub-frame configuration chart of the channel state information reference signals of LTE-Advanced system；
2bit CSI-RS aperiodic that Fig. 2 is the embodiment of the present invention three triggers the implication indicator diagram indicated；
Fig. 3 is the structural representation of the base station apparatus of the embodiment of the present invention five.
Fig. 4 is the structural representation of the UE device of the embodiment of the present invention five.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments；It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Embodiment one
In the present embodiment, CSI-RS sends with aperiodic form, base station by high-level signaling distribute aperiodic CSI-RS configuration information and the corresponding moment send out one time aperiodic CSI-RS, UE at corresponding reception CSI-RS aperiodic.Detailed process is as follows:
1.1, special CSI-RS configuration information aperiodic is individually distributed in base station to UE, and the information such as including the port number of CSI-RS aperiodic, sub-frame configuration, resource location and power bias, these configuration informations inform UE each through relevant parameter.In order to reduced parameter is arranged, reduce systematic parameter quantity, it is preferred that the present embodiment base station utilizes the sub-frame configuration parameter I of existing cycle CSI-RSCSI-RSDistributing the subframe configuration information of CSI-RS aperiodic, UE receives ICSI-RSAfter CSI-RS sub-frame configuration table shown in Fig. 1 find ICSI-RSCorresponding sub-frame offset ΔCSI-RS, it is possible to learn the transmission subframe position of CSI-RS aperiodic.
1.2, when base station needs to send CSI-RS aperiodic to UE, base station sends CSI-RS triggering instruction aperiodic by down control channel PDCCH (can also pass through other channel).This triggering is designated as 1bit character, is designated 1, is about to send aperiodic CSI-RS under expression.If this character mark is 0, then it represents that issue without CSI-RS aperiodic.
1.3, base station uses the special configuration information of step 1.1 distribution, sends a CSI-RS in the corresponding moment；
1.4, UE receive aperiodic CSI-RS trigger instruction (being designated 1) after, then use step 1.1 distribution special configuration information, the corresponding moment detect CSI-RS.
Embodiment two
The present embodiment and embodiment one are distinctive in that: embodiment one send one time aperiodic CSI-RS, and the present embodiment sends repeatedly CSI-RS aperiodic.Therefore, the present embodiment base station is the transmission times N also needing to include CSI-RS aperiodic special aperiodic in CSI-RS configuration information of UE distribution and sends interval information.Detailed process is as follows:
1.1, special CSI-RS configuration information aperiodic is individually distributed in base station to UE.In order to reduced parameter is arranged, reduce systematic parameter quantity, it is preferred that the present embodiment base station utilizes the sub-frame configuration parameter I of existing cycle CSI-RSCSI-RSDistribute aperiodic CSI-RS transmission interval and subframe configuration information, UE receives ICSI-RSAfter CSI-RS sub-frame configuration table shown in Fig. 1 find ICSI-RSCorresponding transmission cycle TCSI-RSWith sub-frame offset ΔCSI-RS, it is possible to learn the transmission interval of CSI-RS aperiodic and send subframe position.
1.2, when base station needs to send CSI-RS aperiodic to UE, base station sends CSI-RS triggering instruction aperiodic by down control channel PDCCH.This triggering is designated as 1bit character, is designated 1, is about to send aperiodic CSI-RS under expression.If this character mark is 0, then it represents that issue without CSI-RS aperiodic.
1.3, base station uses the special configuration information of step 1.1 distribution, according to sending cycle TCSI-RSSend n times CSI-RS；
1.4, UE receive aperiodic CSI-RS trigger instruction (being designated 1) after, then use step 1.1 distribution special configuration information, according to send cycle TCSI-RSDetection n times CSI-RS.
Embodiment three
The present embodiment and example one are distinctive in that: CSI-RS aperiodic of embodiment one triggers and is designated as 1bit character, and the triggering of the present embodiment is designated as 2bit character.The implication of this 2bit character is as in figure 2 it is shown, when being designated 00 combination, indicate and issue without CSI-RS aperiodic；When being designated 01/10/11 combination, triggering instruction for CSI-RS aperiodic, be about to send aperiodic CSI-RS under expression, 01/10/11 also each indicates respectively the parameter combination of CSI-RS configuration information a set of aperiodic simultaneously.Corresponding to 01/10/11, high-rise parameter combination (including port number parameter, sub-frame configuration parameter, resource location parameter, power offset parameter etc.) being configured with altogether three set CSI-RS configuration information aperiodic, when base station needs to send CSI-RS aperiodic to UE, select wherein set of parameter combination for this UE, send corresponding 2bit CSI-RS aperiodic triggering to UE and indicate.
Embodiment four
The present embodiment is based on embodiment one, further, base station only sends CSI-RS aperiodic on the dispatching downlink PRB of UE receiving CSI-RS aperiodic, owing to CSI-RS aperiodic is distributed only on the UE dispatching downlink PRB needing to receive CSI-RS aperiodic, but not whole downlink bandwidth, therefore can economize on resources, improve efficiency.
Embodiment five
The present embodiment illustrates the base station apparatus going for embodiment one to embodiment four and UE device.The structural representation of base station apparatus as it is shown on figure 3, the structural representation of UE device as shown in Figure 4.
Base station apparatus include special aperiodic CSI-RS configure module, aperiodic CSI-RS trigger instruction generation module, aperiodic CSI-RS generation module and sending module, wherein:
Special CSI-RS configuration aperiodic module, for individually distributing special CSI-RS configuration information aperiodic to UE；Aperiodic, CSI-RS triggered instruction generation module, was used for generating CSI-RS triggering instruction aperiodic；Aperiodic, CSI-RS generation module, was used for generating CSI-RS aperiodic；Sending module, for sending CSI-RS triggering instruction aperiodic to UE, and uses CSI-RS configuration information aperiodic special for UE to send CSI-RS aperiodic to UE.
UE device include CSI-RS memory module special aperiodic, aperiodic CSI-RS trigger instruction judge module, aperiodic CSI-RS detection module, wherein:
Special aperiodic CSI-RS memory module, for preserving special CSI-RS configuration information aperiodic that base station is self distribution；Aperiodic, CSI-RS triggered instruction judge module, was used for judging whether to receive CSI-RS triggering instruction aperiodic；Aperiodic, CSI-RS receiver module, was used for, after judging that receiving CSI-RS triggering aperiodic indicates, using self special CSI-RS configuration information aperiodic to receive CSI-RS aperiodic.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can be completed by the hardware that programmed instruction is relevant, aforesaid program can be stored in a computer read/write memory medium, this program upon execution, performs to include the step of said method embodiment；And aforesaid storage medium includes: the various media that can store program code such as ROM, RAM, magnetic disc or CDs.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (12)
1. the sending method of a downlink channel condition information reference signal, it is characterised in that said method comprising the steps of:
A, special CSI-RS configuration information aperiodic is individually distributed in base station to UE, including the port number of CSI-RS aperiodic, sub-frame configuration, resource location and power offset information；
B, base station sends CSI-RS triggering instruction aperiodic to UE, then uses described special CSI-RS configuration information aperiodic to send CSI-RS aperiodic to UE；
After c, UE receive CSI-RS triggering instruction aperiodic, described special CSI-RS configuration information aperiodic is used to receive CSI-RS aperiodic.
2. method according to claim 1, it is characterised in that step a, base station utilizes sub-frame configuration parameter ICSI-RSSubframe configuration information to UE distribution CSI-RS described aperiodic.
3. method according to claim 1, it is characterised in that:
Described special CSI-RS configuration information aperiodic also includes the transmission times of CSI-RS aperiodic and sends interval；Base station uses described special CSI-RS configuration information aperiodic to send repeatedly CSI-RS aperiodic to UE；UE uses described special CSI-RS configuration information aperiodic to receive repeatedly CSI-RS aperiodic.
4. method according to claim 3, it is characterised in that step a, base station utilizes sub-frame configuration parameter ICSI-RSTo the subframe configuration information of UE distribution CSI-RS described aperiodic and transmission interval.
5. method according to claim 1, it is characterised in that step b, base station sends CSI-RS triggering instruction aperiodic by down control channel PDCCH to UE.
6. method according to claim 1, it is characterised in that described CSI-RS triggering aperiodic is designated as 1bit character.
7. method according to claim 1, it is characterised in that described CSI-RS triggering aperiodic is designated as 2bit character.
8. method according to claim 7, it is characterized in that: described 2bit character has 00,01,10,11 4 kind of combination, one of which combination represents cycle CSI-RS nothing but, and other three kinds are combined as aperiodic CSI-RS and trigger instruction and indicate respectively CSI-RS configuration information a set of aperiodic.
9. the method according to claim 1～8 any one, it is characterised in that step b, base station only sends CSI-RS aperiodic on the dispatching downlink PRB of UE receiving CSI-RS aperiodic.
10. the base station apparatus for method described in claim 1, it is characterised in that described device include special aperiodic CSI-RS configure module, aperiodic CSI-RS trigger instruction generation module, aperiodic CSI-RS generation module and sending module, wherein:
Described special CSI-RS configuration aperiodic module, for individually distributing special CSI-RS configuration information aperiodic to UE；
Described CSI-RS triggering aperiodic instruction generation module, is used for generating CSI-RS triggering instruction aperiodic；
Described aperiodic, CSI-RS generation module, was used for generating CSI-RS aperiodic；
Described sending module, for sending CSI-RS triggering instruction aperiodic to UE, and uses CSI-RS configuration information aperiodic special for UE to send CSI-RS aperiodic to UE.
11. the UE device for method described in claim 1, it is characterised in that described device include CSI-RS memory module special aperiodic, aperiodic CSI-RS trigger instruction judge module, aperiodic CSI-RS detection module, wherein:
Described special aperiodic CSI-RS memory module, for preserving special CSI-RS configuration information aperiodic that base station is self distribution；
Described CSI-RS triggering aperiodic instruction judge module, is used for judging whether to receive CSI-RS triggering instruction aperiodic；
Described aperiodic CSI-RS receiver module, for using self special CSI-RS configuration information aperiodic to receive CSI-RS aperiodic.
12. the system of method described in claim 1, it is characterised in that comprise the base station apparatus described in claim 10 and the UE device described in claim 11.
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Application publication date: 20160720 |