CN103546974B - The collocation method of LTE system down control channel and UE - Google Patents
The collocation method of LTE system down control channel and UE Download PDFInfo
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Abstract
The present invention provides a kind of collocation method of LTE system down control channel and UE.Wherein method includes：UE monitors the PCFICH in descending sub frame；When comprising multiple CFI in the down control channel monitoring described PCFICH instruction, corresponding PDCCH is respectively configured according to the plurality of CFI.Multiple CFI in the down control channel domain that the present invention is indicated by PCFICH are respectively used to configure corresponding PDCCH, compared with the prior art only using the single down control channel domain of a CFI instruction, available PDCCH space can be greatly increased, thus meeting the demand of scheduling of resource.
Description
Technical field
The present invention relates to a kind of LTE（Long Term Evolution, Long Term Evolution）The configuration of system descending control channel
Method and UE, belong to wireless communication technology field.
Background technology
In LTE system, a wireless frame length is 10ms, and each radio frames comprises 10 subframes, and a subframe is again
By two time slots（slot）Constitute, a time slot is by 6 or 7 OFDM（Orthogonal Frequency Division
Multiplexing, OFDM) symbol composition.Specifically, when adopting extended cyclic prefix（Cyclic Prefix, letter
Claim：CP in the case of), a time slot is made up of 6 OFDM symbol, and in the case of using normal CP, a time slot is by 7
OFDM symbol is constituted.
Fig. 1 is the descending time slot structural representation that existing LTE system adopts normal CP, as shown in figure 1, a descending time slot
Persistent period be Tslot, this downlink time slots includesIndividual OFDM symbol, corresponds to altogetherIndividual money
Source unit, wherein, continuous in time domainContinuous in individual OFDM symbol and frequency domainIndividual subcarrier constitutes a resource
Block（Resource Block, referred to as：RB）, haveIndividual RB, one of OFDM symbol carrier wave is referred to as a RE, often
Individual RB comprises altogetherIndividual Resource Unit（Resource Element, referred to as：RE）, each RE can be expressed as RE
(k, l), wherein,
As partly shown in the grid shadow in Fig. 1, in a descending sub frame, generally previous in two descending time slots
Front 1～3 OFDM symbol of descending time slot carries Physical Downlink Control Channel（Physical Downlink Control
Channel, referred to as：PDCCH）, Physical HARQ Indicator Channel（Physical Hybrid Automatic Repeat Request
Indicator Channel, referred to as：PHICH）With Physical Control Format Indicator Channel (Physical Control Format
Indication Channel, referred to as：PCFICH), especially by Physical Control Format Indicator Channel (Physical Control
Format Indication Channel, referred to as：PCFICH control format instruction)（Control Format
Indication, referred to as：CFI）Information come to indicate PDCCH take OFDM symbol number.In the prior art, in a subframe
The OFDM symbol number that PDCCH takies is as shown in table 1.
Table 1
Wherein, PMCH is Physical Multicast Channel（Physical Multicast Channel）, PDSCH is for physical down altogether
Enjoy channel（Physical Downlink Shared Channel）, MBSFN is（Multicast Broadcast Single
Frequency Network）Multicast service Single Frequency Network.
The OFDM symbol number purpose corresponding relation that CFI and PDCCH takies is as shown in table 2.
Table 2
| The value that CFI represents | The OFDM symbol number that PDCCH takies |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4（Retain） | No |
In practice, it has been found that in some scenarios, even if configuration 3 OFDM symbol of PDCCH channel occupancy, still can not expire
Sufficient scheduling of resource demand.For example, in the case that 1.4M, 3M, 5M are used for group service, because group number is relatively more, group's language
The semi-persistent scheduling of sound（Semi-Persistent Scheduling, referred to as：SPS）The comparison that activation command issues is many, accordingly
The public space of PDCCH traffic order and private space demand many, and be up to 3 in a subframe（In 1.4M situation
Under have 4）OFDM symbol is used for the scheduling of PDCCH, even if so also can not meet the demand to OFDM quantity for these scenes.
In addition, under the sub-frame of uplink configuring condition more than descending sub frame configuration, downlink business is fewer, and uplink service compares frequency
Numerous, the demand in PDCCH space now is also difficult to be met.
Content of the invention
The present invention provides a kind of collocation method of LTE system down control channel and UE, in order to extend PDCCH space, with
Meet the demand of scheduling of resource.
One aspect of the present invention provides a kind of collocation method of LTE system down control channel, including：
UE monitors the PCFICH in descending sub frame；
When comprising multiple CFI in the down control channel monitoring described PCFICH instruction, divided according to the plurality of CFI
Do not configure corresponding PDCCH.
Another aspect of the present invention provides a kind of UE, including：
Monitoring modular, for monitoring the PCFICH in descending sub frame；
Configuration module, for multiple when comprising in the down control channel that monitoring module monitors indicate to described PCFICH
During CFI, corresponding PDCCH is respectively configured according to the plurality of CFI.
It is corresponding that multiple CFI in the down control channel domain that the present invention is indicated by PCFICH are respectively used to configuration
PDCCH, compared with the prior art only using the single down control channel domain of a CFI instruction, can greatly increase available
PDCCH space, thus meeting the demand of scheduling of resource.
Brief description
Fig. 1 is the descending time slot structural representation that existing LTE system adopts normal CP；
Fig. 2 is the flow chart of the collocation method of LTE system down control channel of the present invention；
Fig. 3 is the flow chart of the PDCCH configuration process for TDD subframe；
Fig. 4 A is the example schematic of down control channel configuration in normal sub-frames；
Fig. 4 B is the example schematic of down control channel configuration in a special subframe；
Fig. 5 is the flow chart of the PDCCH configuration process for FDD subframe；
Fig. 6 is the example schematic of down control channel configuration in a FDD subframe；
Fig. 7 is the structural representation of UE embodiment of the present invention.
Specific embodiment
Fig. 2 is the flow chart of the collocation method of LTE system down control channel of the present invention, as shown in Fig. 2 including following walking
Suddenly：
Step 100, UE monitors the PCFICH in descending sub frame.
Wherein, described descending sub frame can be TDD（Time Division Duplexing, time division duplex）Subframe or FDD
（Frequency Division Duplexing, FDD）Subframe, specifically will illustrate in subsequent content.
Step 200, described UE when comprising multiple CFI in the down control channel monitoring described PCFICH instruction, root
It is respectively configured corresponding PDCCH according to the plurality of CFI.
As shown in Table 2 above, CFI=4 of the prior art is not defined as retaining item.And use in the present invention
Make the extension of channel.Specifically, when UE monitors the CFI=4 that in first OFDM symbol in described descending sub frame, RE is carried
When, then confirm to comprise multiple CFI in described descending sub frame；In addition, if only monitoring to comprise a CFI in described PCFICH,
Then processed using prior art manner.Coding mapping relation during CFI=4 for example can be as shown in table 3, and herein only one
Example, is not specifically limited.
Table 3
Multiple CFI in the down control channel domain that the present embodiment methods described is indicated by PCFICH are respectively used to configure
Corresponding PDCCH, compared with the prior art only using the single down control channel domain of a CFI instruction, can increase
Plus available PDCCH space, thus meeting the demand of scheduling of resource.
Illustrate respectively below for different subframe type.
TDD subframe
Wherein, TDD subframe refers to the subframe using TDD technique construction, also with regard to the frame structure type 2 of LTE standard indication, pin
To the PDCCH configuration process of TDD subframe as shown in figure 3, comprising the steps：
Step A：If Integer n=0；
Step B：Identification takies the value of the CFI of 3n+1 row RE；When identifying CFI=4, execution step C；When identifying
During CFI=m and m ∈ [1,3], execution step D；
Step C：3n+1 in described TDD subframe is arranged and is configured to PDCCH to the 3n+3 unappropriated RE of row, by the value of n
Plus 1, and return execution step B；
Step D：3n+1 in described TDD subframe is arranged and is configured to PDCCH to the 3n+m unappropriated RE of row.
Illustrated below：
Fig. 4 A is the example schematic of the down control channel configuration in normal sub-frames.Wherein, normal sub-frames refer to
Do not comprise the TDD subframe of primary synchronization channel.In Figure 4 A, the square being filled to black represents RE shared by PCFICH, fills out
Fill the square for grid and represent the RE being configured to PDCCH and PHICH, the square being filled to white represents unrelated to the invention
RE.
As shown in Figure 4 A, the value of three CFI, respectively CFI=4, CFI=4 and CFI are had in the PCFICH of this normal sub-frames
=3.It is expressed as being filled to the square of grid in Figure 4 A using the PDCCH being configured after method shown in Fig. 3.Arrow in Fig. 4 A
Represent the sequencing that these three CFI are identified successively.
Fig. 4 B is the example schematic of the down control channel configuration in a special subframe.Wherein, special subframe refers to
Comprise the TDD subframe of primary synchronization channel, in 10 subframes that radio frames comprise, special subframe is usually the 1st and the 6th
Individual TDD subframe.In figure 4b, the square being filled to black represents RE shared by PCFICH, is filled to the square table of grid
Show the RE being configured to PDCCH and PHICH, the square being filled to horizontal line represents synchronizing channel, specially physics primary synchronization channel
（Physical Synchronization Channel, referred to as：PSCH）, it is filled to white square and represent unrelated to the invention
RE.
As shown in Figure 4 B, the value of three CFI, respectively CFI=4, CFI=4 and CFI are had in the PCFICH of this normal sub-frames
=3.It is expressed as being filled to the square of grid in Figure 4 A using the PDCCH being configured after method shown in Fig. 3, due to the 3rd row RE
Through by primary synchronization channel（PSCH）Take, therefore, this row RE is not configured as PDCCH.Arrow in Fig. 4 B represents these three
CFI is by the sequencing according to identification.
FDD subframe
Wherein, FDD subframe refers to the subframe using FDD technique construction, i.e. the frame structure Class1 of LTE standard agreement indication.
As shown in figure 5, specific configuration process is as follows：
Step 210, identification takies the value of the CFI of the 1st row RE；
Step 211, when identifying CFI=1, the 1st unappropriated RE of row in described FDD subframe is configured to PDCCH；
Step 212, when identifying CFI=2, the 1st～2 unappropriated RE of row in described FDD subframe is configured to
PDCCH；
Step 213, when identifying CFI=3, the 1st～3 unappropriated RE of row in described FDD subframe is configured to
PDCCH；
Step 214, when identifying CFI=4, the 1st～3 unappropriated RE of row in described FDD subframe is configured to
PDCCH, and continue executing with step 220.
Step 220, identification takies the value of the CFI of the 4th row RE；
Step 221, when identifying CFI=1, the 4th unappropriated RE of row in described FDD subframe is configured to PDCCH；
Step 222, when identifying CFI=2, the 4th～5 unappropriated RE of row in described FDD subframe is configured to
PDCCH.
Fig. 6 is the example schematic of the down control channel configuration in a FDD subframe.In figure 6, it is filled to black
Square represents the RE shared by PCFICH, and the square being filled to grid represents the RE being configured to PDCCH, is filled to the side of horizontal line
Block represents PSCH, and the square being filled to vertical line represents auxiliary synchronization channel（Secondary Synchronization
Channel, referred to as：SSCH）, it is filled to white square and represent RE unrelated to the invention.
As shown in fig. 6, due to being limited by synchronizing channel, only having the value of two CFI in the PCFICH of this FDD subframe,
It is respectively CFI=4, CFI=2.It is expressed as being filled to the side of grid in figure 6 using the PDCCH being configured after method shown in Fig. 5
Block.Arrow in Fig. 6 represents these three CFI by the sequencing according to identification.
Fig. 7 is the structural representation of UE embodiment of the present invention, in order to realize said method, as illustrated, this UE bag
Include：Monitoring modular 10 and configuration module 20, its operation principle is as follows：
Monitor the PCFICH in descending sub frame by monitoring modular 10；When monitoring module monitors indicate to described PCFICH
When comprising multiple CFI in down control channel, corresponding PDCCH is respectively configured according to the plurality of CFI by configuration module 20.Tool
Body ground, when monitoring modular 20 monitors the CFI=4 taking first row RE in described PCFICH, then confirms bag in described PCFICH
Containing multiple CFI.For the concrete configuration process of FDD subframe and TDD subframe, can be found in the content shown in Fig. 4 A, 4B and Fig. 6, this
Place repeats no more.
Multiple CFI in the down control channel domain that UE described in the present embodiment is indicated by PCFICH are respectively used to configure phase
The PDCCH answering, compared with the prior art only using the single down control channel domain of a CFI instruction, can greatly increase
Available PDCCH space, thus meet the demand of scheduling of resource.
One of ordinary skill in the art will appreciate that：The all or part of step realizing said method embodiment can be passed through
Completing, aforesaid program can be stored in a computer read/write memory medium the related hardware of programmed instruction, this program
Upon execution, execute the step including said method embodiment；And aforesaid storage medium includes：ROM, RAM, magnetic disc or light
Disk etc. is various can be with the medium of store program codes.
Finally it should be noted that：Above example only in order to technical scheme to be described, is not intended to limit；Although
With reference to the foregoing embodiments the present invention is described in detail, it will be understood by those within the art that：It still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to wherein some technical characteristics；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (2)
1. a kind of collocation method of LTE system down control channel is it is characterised in that include：
UE monitors the PCFICH in descending sub frame；
When comprising multiple CFI in the down control channel monitoring described PCFICH instruction, joined respectively according to the plurality of CFI
Put corresponding PDCCH；
Comprise multiple CFI in the described down control channel monitoring described PCFICH instruction to include：
As the CFI=4 monitoring to take first row RE in described PCFICH, then confirm the descending control of described PCFICH instruction
Multiple CFI are comprised in channel；
When described descending sub frame is TDD subframe, corresponding PDCCH is respectively configured according to the plurality of CFI and includes：
Step A：If Integer n=0；
Step B：Identification takies the value of the CFI of 3n+1 row RE；When identifying CFI=4, execution step C；When identifying CFI
When=m and m ∈ [1,3], execution step D；
Step C：3n+1 in described TDD subframe is arranged and is configured to PDCCH to the 3n+3 unappropriated RE of row, the value of n is added 1,
And return execution step B；
Step D：3n+1 in described TDD subframe is arranged and is configured to PDCCH to the 3n+m unappropriated RE of row；
Or,
When described descending sub frame is FDD subframe, corresponding PDCCH is respectively configured according to the plurality of CFI and includes：
Identification takies the value of the CFI of the 1st row RE；
When identifying the CFI=1 taking the 1st row RE, the 1st unappropriated RE of row in described FDD subframe is configured to
PDCCH；
When identifying the CFI=2 taking the 1st row RE, the 1st～2 unappropriated RE of row in described FDD subframe is configured to
PDCCH；
When identifying the CFI=3 taking the 1st row RE, the 1st～3 unappropriated RE of row in described FDD subframe is configured to
PDCCH；
When identifying the CFI=4 taking the 1st row RE, the 1st～3 unappropriated RE of row in described FDD subframe is configured to
PDCCH, and identify the value of the CFI taking the 4th row RE；
When identifying the CFI=1 taking the 4th row RE, the 4th unappropriated RE of row in described FDD subframe is configured to
PDCCH；
When identifying the CFI=2 taking the 4th row RE, the 4th～5 unappropriated RE of row in described FDD subframe is configured to
PDCCH.
2. a kind of UE is it is characterised in that include：
Monitoring modular, for monitoring the PCFICH in descending sub frame；
Configuration module, for when comprising multiple CFI in the down control channel that monitoring module monitors indicate to described PCFICH,
Corresponding PDCCH is respectively configured according to the plurality of CFI；
Described monitoring modular is used for as the CFI=4 monitoring to take first row RE in described PCFICH, then confirming described
Multiple CFI are comprised in PCFICH；
Described configuration module, for corresponding PDCCH is respectively configured according to the plurality of CFI, specially：
Described configuration module, specifically for when described descending sub frame is TDD subframe, being respectively configured phase according to the plurality of CFI
The PDCCH answering includes：
Step A：If Integer n=0；
Step B：Identification takies the value of the CFI of 3n+1 row RE；When identifying CFI=4, execution step C；When identifying CFI
When=m and m ∈ [1,3], execution step D；
Step C：3n+1 in described TDD subframe is arranged and is configured to PDCCH to the 3n+3 unappropriated RE of row, the value of n is added 1,
And return execution step B；
Step D：3n+1 in described TDD subframe is arranged and is configured to PDCCH to the 3n+m unappropriated RE of row；
Or,
Described configuration module, specifically for when described descending sub frame is FDD subframe, being respectively configured phase according to the plurality of CFI
The PDCCH answering includes：
Identification takies the value of the CFI of the 1st row RE；
When identifying the CFI=1 taking the 1st row RE, the 1st unappropriated RE of row in described FDD subframe is configured to
PDCCH；
When identifying the CFI=2 taking the 1st row RE, the 1st～2 unappropriated RE of row in described FDD subframe is configured to
PDCCH；
When identifying the CFI=3 taking the 1st row RE, the 1st～3 unappropriated RE of row in described FDD subframe is configured to
PDCCH；
When identifying the CFI=4 taking the 1st row RE, the 1st～3 unappropriated RE of row in described FDD subframe is configured to
PDCCH, and identify the value of the CFI taking the 4th row RE；
When identifying the CFI=1 taking the 4th row RE, the 4th unappropriated RE of row in described FDD subframe is configured to
PDCCH；
When identifying the CFI=2 taking the 4th row RE, the 4th～5 unappropriated RE of row in described FDD subframe is configured to
PDCCH.
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| KR20180005671A (en) * | 2015-05-15 | 2018-01-16 | 샤프 가부시키가이샤 | Terminal device, base station device and communication method |
| CN108023667B (en) * | 2016-11-03 | 2020-06-02 | 华为技术有限公司 | Transmission control method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2330841A1 (en) * | 2008-09-28 | 2011-06-08 | China Mobile Communications Corporation | Method for user uplink data scheduling and user equipment |
| CN102356682A (en) * | 2009-03-16 | 2012-02-15 | 松下电器产业株式会社 | Wireless communication terminal device, wireless communication base station device, and resource region setting method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2330841A1 (en) * | 2008-09-28 | 2011-06-08 | China Mobile Communications Corporation | Method for user uplink data scheduling and user equipment |
| CN102356682A (en) * | 2009-03-16 | 2012-02-15 | 松下电器产业株式会社 | Wireless communication terminal device, wireless communication base station device, and resource region setting method |
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