CN104144503B - Dynamic improves method, system and the mobile terminal of the PDCCH capacity upper limit - Google Patents
Dynamic improves method, system and the mobile terminal of the PDCCH capacity upper limit Download PDFInfo
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Abstract
This disclosure relates to a kind of dynamic improves method, system and the mobile terminal of the PDCCH capacity upper limit.This method includes receiving the high-rise indicated number that network side is sent by radio resource control RRC signaling, wherein, the number of users that active state is currently in the channel quality and/or cell that high-rise indicated number is fed back based on uplink data is determined；According to the predefined distribution to Physical Control Format Indicator Channel PCFICH, the control format instruction CFI information carried in PCFICH is identified；Running time-frequency resource according to shared by the high-rise indicated number of reception, the CFI information identified and user terminal version determine PDCCH.The disclosure with dynamic configuration and can identify PDCCH capacity on the premise of backward compatibility is ensured.
Description
Technical field
This disclosure relates to LTE（Long Term Evolution, Long Term Evolution）GSM, especially, it is related to one
Kind dynamic improves PDCCH（Physical Downlink Control Channel, Physical Downlink Control Channel）Maximum size
Method, system and mobile terminal.
Background technology
3GPP LTE systems are 3G（3rd Generation, 3-G (Generation Three mobile communication system)）Long Term Evolution version.LTE
System and existing GSM（Global System for Mobile communications, global system for mobile communications）、
WCDMA（Wideband Code Division Multiple Access, WCDMA）、CDMA2000（Code
Division Multiple Access2000, CDMA 2000）Compared Deng GSM, it provides higher use
Family peak rate, bigger coverage and more preferable community user QoS（Quality of Service, service quality）
Deng.LTE-A（LTE-Advanced）System is that it strengthens version, it is proposed that more competitive system performance index.
LTE and lte-a system use OFDMA in down direction（Orthogonal Frequency Division
Multiple Access, OFDM）Technology, in the upstream direction using the relatively low SC-FDMA of peak-to-average force ratio（Single
Carrier-Frequency Division Multiple Access, single-carrier frequency division multiple access）Technology.In addition, adopted in system
MIMO（Multiple Input Multiple Output, multiple-input and multiple-output）Technology provide spatial multiplex gains with
And emission diversity gain.As can be seen here, LTE and lte-a system available resources include the dimensions such as time domain, frequency domain and spatial domain, base station
By scheduling and resource allocation algorithm, when the channel information based on intra-cell users flexibly reasonably distributes suitable for user
Gap, PRB（Physical Resource Block, Physical Resource Block）、MCS（Modulation and Coding Scheme,
Modulating-coding form）, transmission power and MIMO transmission scheme etc., to improve throughput of system, while meet Cell Edge User
Rate requirement.
In LTE and lte-a system, the control signaling information of down channel is with various types of DCI（Downlink
Control Information, Downlink Control Information）Transmission, these DCI are carried by PDCCH.
In the 10ms frame structures that LTE and lte-a system are defined, the corresponding TTI of 1ms descending sub frames
（Transmission Time Interval, Transmission Time Interval）.In a TTI, n before PDCCH takes in time domain（n<
=3）Individual OFDM（Orthogonal Frequency Division Multiplexing, OFDM）Symbol, in frequency domain
Upper occupancy whole system bandwidth.Meanwhile other channels are included such as reference signal, PCFICH（Physical Control Format
Indicator Channel, Physical Control Format Indicator Channel）、PHICH（Physical HARQ Indicator
Channel, Physical HARQ Indicator Channel）Deng being also multiplexed this n OFDM symbol with PDCCH.Therefore in each of the lower in row subframe, only
The reserved running time-frequency resource for having limited quantity can be used for transmitting Downlink Control Information, that is, carrying the PDCCH of DCI information can be provided with time-frequency
Source is very limited amount of.
The least unit of PDCCH resource distribution is CCE（Control Channel Element, control channel element）, 1
Individual CCE includes 9 REG（Resource Element Group, resource element groups）, and a REG includes 4 RE
（Resource Element, resource element）, therefore a CCE contains 36 RE.LTE and LTE-A standards regulation allows CCE
There are four kinds of AL（Aggregation Level, polymerization grade）, AL=1,2,4 and 8, a PDCCH channel is corresponded to respectively and is accounted for simultaneously
With 1,2,4 or 8 CCE.
Different according to the DCI types of transmission, PDCCH includes two class search spaces, CSS（Common Search Space,
Public search space）And USS（UE-specific Search Space, user-specific search space）.CSS positions are fixed
, common detection information is placed, and USS is used to transmit the information related to individual user, the resource impact in the space needs to lead to
Cross base station and PDCCH resource distribution determination is carried out to the user dispatched in cell.In this two classes search space, user uses blind check
DCI information in survey method demodulation PDCCH, each UE monitor the PDCCH Candidate Sets in cell USS and attempted one by one simultaneously
Demodulation.
In this two classes search space, user is using the DCI information in blind checking method parsing PDCCH, i.e. each UE is same
When in cell CSS and its own USS PDCCH may Candidate Set attempt to parse one by one, it is correct needed for it until parsing
DCI information or in all PDCCH Candidate Sets all without its required DCI information.Specific DCI information resolvings can
With including：UE（User Equipment, user equipment）Receive wireless signal, IFFT is carried out to reception signal（Inverse
Fast Fourier transform, fast adverse Fourier transform）Processing, precoding decoding, demodulation and scrambler verification etc..
PDCCH carries the control signaling of LTE and lte-a system downlink data transmission, and UE connects to the correct of downlink data
Receive, depend heavily on the correct detection to control signaling in PDCCH, therefore, PDCCH accurate delivery whether to system just
Often run most important.As it was previously stated, the running time-frequency resource that can be used to transmit PDCCH in a subframe is limited, at most it is only capable of complete
Transmitted in preceding 3 OFDM symbols of bandwidth, as shown in figure 1, in these only resources, also to remove other as transmitted
PCFICH, PHICH and the part resource shared by reference signal, therefore the resource that PDCCH can be transmitted is more limited.
On the other hand, it is guarantee LTE and the coverage and cell edge transmission rate of lte-a system, it is desirable to more
Reliable PDCCH transmission.If domestic telecommunication operator builds LTE and lte-a system at present, its available radio spectrum is only surplus
The high frequency spectrum such as 2.1GHz, 2.6GHz, its signal attenuation are rapid.And all can for the consideration of Cost Problems, operator's majority
Selection utilization builds LTE/LTE-A networks in existing site resource, and this requires more accurate more effectively control information transmission.
In addition in the case where channel quality is poor, the transmission to cell UE especially its PDCCH of cell edge UE is also required to more
Resource.Therefore PDCCH resource is of great rarity, and needs enhancing badly.
It is the generally acknowledged viewpoint of current industry that PDCCH, which needs to strengthen, but currently available technology enhancing PDCCH means have very much
Limit.
（1）Increase CCE AL method：Refer to correspondingly increases to 2,4,8 and 16 by CCE AL by present 1,2,4 and 8.
This method can reduce the code check for the DCI information transmitted in corresponding PDCCH, improve correct parsing DCI information
Probability, ensure it is descending control link data accurate delivery.But the problem of this method is present is, increasing CCE AL can carry
Rise the reliability of particular UE DCI information transfers, but occupy more PDCCH resources, reduce can simultaneous transmission DCI
The UE numbers of information, i.e., with reduce the cost of power system capacity exchange for DCI information transmission reliability lifted.
（2）Increase the power of PDCCH transmission symbols：Refer to the transmission power of increase transmission PDCCH symbols.
It improves the signal transmission power of transmission DCI information, and then UE receiving terminals can be improved and receive PDCCH
Signal to noise ratio, improve and be properly received the probability of DCI information.But in the case where general power is constant, improve the transmitting of PDCCH symbols
Power necessarily reduces PDSCH（Physical Downlink Shared Channel, Physical Downlink Shared Channel）And its
The power of his transmission symbol, reduce the signal to noise ratio of its reception signal.Meanwhile increase the transmitting work(of PDCCH transmission symbols
Rate can also increase the interference to neighbor cell edge UE reception signals, the especially interference to PDCCH domains.
（3）The method being semi-statically configured：Refer to when there is UE to be expected to need lasting running time-frequency resource, by high-rise configuration signal,
Certain in PDSCH is fixed into time-frequency resource allocating and gives the UE, the resource without taking PDCCH again is scheduled.
The expense of PDCCH resource is this method save, for dispatching more UE provides possibility simultaneously.But this method can not root
The dynamic dispatching to running time-frequency resource is realized according to business demand, so as to significantly reduce the dispatching efficiency of running time-frequency resource.
The content of the invention
The disclosure is in view of at least one in problem above proposes new technical scheme.
The disclosure provides the side that a kind of dynamic improves physical downlink control channel PDCCH maximum size in terms of one
Method, it with dynamic configuration and can identify PDCCH capacity on the premise of backward compatibility is ensured.
The disclosure provides a kind of mobile terminal in its another aspect, and it can dynamic on the premise of backward compatibility is ensured
Configure and identify PDCCH capacity.
The disclosure is what its another aspect provided that a kind of dynamic improves physical downlink control channel PDCCH maximum size
System, it with dynamic configuration and can identify PDCCH capacity on the premise of backward compatibility is ensured.
According to the disclosure, there is provided a kind of method that dynamic improves physical downlink control channel PDCCH maximum size, including：
Receive network side and pass through radio resource control RRC（Radio Resource Control, wireless heterogeneous networks）Letter
The high-rise indicated number sent is made, wherein, work as in the channel quality and/or cell that high-rise indicated number is fed back based on uplink data
The preceding number of users in active state is determined；
According to the predefined distribution to Physical Control Format Indicator Channel PCFICH, the control carried in PCFICH is identified
Form processed indicates CFI（Control Format Indicator, control format instruction）Information；
According to shared by the high-rise indicated number of reception, the CFI information identified and user terminal version determine PDCCH when
Frequency resource.
In some embodiments of the present disclosure, this method also includes：
It is determined that PDCCH shared by running time-frequency resource in detect that PDCCH is carried by the method for blind Detecting under
Row control information DCI.
In some embodiments of the present disclosure, high-rise indicated number is determined by following step：
It is more than in the channel quality of uplink data feedback in setting channel quality thresholds and/or cell and is currently at work
The number of users of jump state be less than setting number of users in the case of, set high-rise indicated number be designated as redaction user terminal with it is old
1 to 3 full bandwidth orthogonal frequency division multiplex OFDM symbol of version user terminal distribution is carrying DCI；
It is less than or equal in setting channel quality thresholds and/or cell currently locate in the channel quality of uplink data feedback
In the case that the number of users of active state is more than or equal to setting number of users, high-rise indicated number is set to be designated as redaction user
3 to 5 full bandwidth OFDM symbols of terminal distribution to carry DCI information, for legacy version user terminal distribute 1 to 3 full bandwidth
OFDM symbol is carrying DCI；
Wherein, redaction user terminal refers to R10（Release10）The terminal of version and its above version, legacy version user
Terminal refers to the terminal of below R10 versions.
In some embodiments of the present disclosure, according to the high-rise indicated number of reception, the CFI information identified and user terminal
Version determines that the step of running time-frequency resource shared by PDCCH includes：
Redaction user terminal, which is designated as, in high-rise indicated number distributes 1 to 3 full bandwidth OFDM with legacy version user terminal
In the case of symbol, correspondingly determine that PDCCH takes the 1st full bandwidth in a subframe according to the CFI information identified
OFDM symbol, preceding 2 full bandwidth OFDM symbols or preceding 3 full bandwidth OFDM symbols；
Redaction user terminal, which is designated as, in high-rise indicated number distributes 3 to 5 full bandwidth OFDM symbols to carry DCI's
In the case of, according to the CFI information identified correspondingly determine PDCCH take a subframe in preceding 4 full bandwidth OFDM symbols,
Preceding 5 full bandwidth OFDM symbols or preceding 3 full bandwidth OFDM symbols.
In some embodiments of the present disclosure, this method also includes：
In response to the change of high-rise indicated number, the present sub-frame to be changed in high-rise indicated number and follow-up given sub-frame
Interior, network side reconfigures CFI information, to indicate 3 full bandwidth OFDM symbols before PDCCH occupancy.
In some embodiments of the present disclosure, this method also includes：
The user of active state is currently in the channel quality and/or cell that network side feeds back according to uplink data
Configuration of the change adjustment of number to CFI information.
According to the disclosure, a kind of mobile terminal is additionally provided, including：
High-rise indicated number receiving unit, the high-rise indicated number sent for receiving network side by RRC signaling, wherein, it is high
The number of users institute of active state is currently in the channel quality and/or cell that layer indicated number is fed back based on uplink data
It is determined that；
CFI information identificating units, for according to the predefined distribution to PCFICH, identifying what is carried in PCFICH
CFI information；
PDCCH takes resource determining unit, for the high-rise indicated number according to reception, the CFI information identified and user
Terminal versions determine the running time-frequency resource shared by PDCCH.
In some embodiments of the present disclosure, mobile terminal also includes：
DCI detection units, for it is determined that PDCCH shared by running time-frequency resource in detected by the method for blind Detecting
The DCI that PDCCH is carried.
In some embodiments of the present disclosure, PDCCH takes resource determining unit and is designated as redaction in high-rise indicated number
In the case that user terminal distributes 1 to 3 full bandwidth OFDM symbol with legacy version user terminal, according to the CFI information identified
Correspondingly determine that PDCCH takes the 1st full bandwidth OFDM symbol, preceding 2 full bandwidth OFDM symbols or first 3 in a subframe
Full bandwidth OFDM symbol；Redaction user terminal, which is designated as, in high-rise indicated number distributes 3 to 5 full bandwidth OFDM symbols to hold
In the case of carrying DCI, correspondingly determine that PDCCH takes preceding 4 full bandwidths in a subframe according to the CFI information identified
OFDM symbol, preceding 5 full bandwidth OFDM symbols or preceding 3 full bandwidth OFDM symbols, wherein, redaction user terminal refers to R10 versions
The terminal of sheet and its above version, legacy version user terminal refer to the terminal of below R10 versions.
According to the disclosure, the system that a kind of dynamic improves the PDCCH capacity upper limit is additionally provided, including the network equipment and foregoing
The mobile terminal of embodiment.
In some embodiments of the present disclosure, the network equipment is more than setting in the channel quality that uplink data feeds back to be believed
Be currently in road quality threshold and/or cell active state number of users be less than setting number of users in the case of, set high
Layer indicated number is designated as redaction user terminal and distributes 1 to 3 full bandwidth OFDM symbol with legacy version user terminal to carry
DCI；It is less than or equal to be currently at work in setting channel quality thresholds and/or cell in the channel quality of uplink data feedback
In the case that the number of users of jump state is more than or equal to setting number of users, high-rise indicated number is set to be designated as redaction user terminal
3 to 5 full bandwidth OFDM symbols are distributed to carry DCI, distribute 1 to 3 full bandwidth OFDM symbol for legacy version user terminal
To carry DCI；Wherein, redaction user terminal refers to the terminal of R10 versions and its above version, and legacy version user terminal refers to
The terminal of below R10 versions.
In some embodiments of the present disclosure, the network equipment is sent out in response to the change of high-rise indicated number in high-rise indicated number
In the present sub-frame for changing and follow-up given sub-frame, CFI information is reconfigured, to indicate 3 full bandwidths before PDCCH occupancy
OFDM symbol.
In some embodiments of the present disclosure, channel quality that the network equipment feeds back according to uplink data and/or small
Configuration of the change adjustment of the number of users of active state to CFI information is currently in area.
In the technical scheme of the disclosure, according to uplink data feed back channel quality and/or cell in currently locate
High-rise indicated number parameter can be determined in the number of users of active state, can be with shared by dynamic control PDCCH based on the parameter
Running time-frequency resource, channel quality is preferable and/or cell in be currently at active state number of users it is less in the case of, can be with
Distribute less PDCCH running time-frequency resources for user, channel quality is poor and/or cell in be currently at the user of active state
More PDCCH running time-frequency resources are distributed in the case that number is more for user, to ensure that the correct of the DCI of PDCCH channel bearings connects
Receive.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding of the disclosure, forms the part of the application.Attached
In figure：
Fig. 1 is that PDCCH resource takes schematic diagram in the prior art.
Fig. 2 is that disclosure PDCCH resource takes schematic diagram.
Fig. 3 is the method that the dynamic of disclosure one embodiment improves physical downlink control channel PDCCH maximum size
Schematic flow sheet.
Fig. 4 is high-rise configuration PDCCH symbolic number conversion time schematic diagrames.
Fig. 5 is the structural representation of the mobile terminal of disclosure one embodiment.
Fig. 6 is the structural representation of the mobile terminal of another embodiment of the disclosure.
Fig. 7 is the structural representation that the dynamic of disclosure one embodiment improves the system of the PDCCH capacity upper limit.
Embodiment
The disclosure is described below with reference to accompanying drawings.It should be noted that following description is only explanatory in itself and shown
Example property, never as to the disclosure and its application or any restrictions used.Unless stated otherwise, otherwise, implementing
The part and the positioned opposite and numerical expression and numerical value of step illustrated in example is not intended to limit the scope of the present disclosure.In addition,
Technology well known by persons skilled in the art, method and apparatus may not be discussed in detail, but be meant as in appropriate circumstances
Part for specification.
It can be provided to solve the above problems, the following embodiments of the disclosure provide a kind of dynamic raising PDCCH channels with time-frequency
The scheme of the source upper limit.The technical scheme on the premise of LTE system backward compatibility is ensured, add PDCCH channels it is available when
Frequency resource, user capacity is not only improved in PDCCH dimensions, and improve cell edge UE PDCCH reception reliability.
The following embodiments of the disclosure are to prior standards version（For example, R8, R9 version）User there is backwards compatibility.
Generally, the disclosure provides a kind of instruction PDCCH in a subframe and takes OFDM symbol number（Hereinafter referred to as
" symbolic number "）Method, specifically include following content：
System notifies mono- high-rise indicated number of UE by high-level signaling：
When high level is 0 by the high-rise indicated number of such as RRC signaling configuration, the CFI letters of system side configuration PCFICH instructions
Breath can be 0,1 or 2, and for new early version UE, correspondingly, it indicates that PDCCH takes full bandwidth OFDM symbols in 1 subframe
Number is respectively 1,2 or 3；
When high level is 1 by the high-rise indicated number of such as RRC signaling configuration, the CFI letters of system side configuration PCFICH instructions
Breath can be 0,1 or 2, and for earlier version UE, its corresponding full bandwidth PDCCH symbolic number is respectively 1,2 or 3, and
For redaction UE, its corresponding full bandwidth PDCCH symbolic number is respectively 4,5 or 3, as shown in Figure 2.If in view of height
Layer indicated number is 1, then when CFI is designated as 0 or 1, different OFDM symbols is corresponded to respectively to earlier version UE and redaction UE
Number.And when CFI is designated as 2, it is identical that earlier version UE and redaction UE corresponds to symbolic number, is 3, then can solve in high level
The front and rear signaling fuzzy problem of indicated number change.For the sake of clarity, new and old edition UE configuring condition is summarized as follows：
Table 1
In addition, the embodiment of the present disclosure considers in increase PDCCH symbolic numbers and in CFI designated symbol number conversion processes
The backwards compatibility of system has been arrived, has made earlier version UE remain to use in new version system.
Fig. 3 is the method that the dynamic of disclosure one embodiment improves physical downlink control channel PDCCH maximum size
Schematic flow sheet.
As shown in figure 3, the embodiment may comprise steps of：
S302, the high-rise indicated number that network side is sent by radio resource control RRC signaling is received, wherein, the high level refers to
The number of users institute of active state is currently in the channel quality and/or cell that registration is fed back based on uplink data really
It is fixed；
For example, the high-rise indicated number can be 0 or 1, when the channel quality of uplink data feedback is higher than setting channel
Be currently in quality threshold, cell active state number of users be less than setting number of users or uplink data feedback
Channel quality is less than setting number of users higher than the number of users that active state is currently in setting channel quality thresholds and cell
In the case of, high-rise indicated number is arranged to 0,1-3 OFDM symbol of full bandwidth is distributed for PDCCH；Work as uplink data
The channel quality of feedback is more than setting less than the number of users that active state is currently in setting channel quality thresholds, cell and used
Amount or the channel quality of uplink data feedback, which are less than in setting channel quality thresholds and cell, is currently at active state
Number of users be more than setting number of users in the case of, high-rise indicated number is arranged to 1, is the PDCCH point in redaction terminal
The 3-5 OFDM symbol with full bandwidth, to lift the transmission reliability of carrying information in PDCCH.
S304, according to the predefined distribution to Physical Control Format Indicator Channel PCFICH, identify in PCFICH and hold
The control format instruction CFI information of load；
For example, when high-rise indicated number be 0 when, for new, legacy version user terminal, when CFI information be respectively 0,1 or
When 2, corresponding preceding 1 OFDM symbol, preceding 2 OFDM symbols or preceding 3 OFDM for indicating PDCCH and taking full bandwidth in 1 subframe
Symbol；When high-rise indicated number is 1, for legacy version user terminal, when CFI information is respectively 0,1 or 2, correspondingly refer to
Show that PDCCH takes preceding 1 OFDM symbol, preceding 2 OFDM symbols or preceding 3 OFDM symbols of full bandwidth in 1 subframe, for new
It is corresponding to indicate that PDCCH is taken in 1 subframe before full bandwidth when CFI information is respectively 0,1 or 2 for version user terminal
4 OFDM symbols, preceding 5 OFDM symbols or preceding 3 OFDM symbols.
Wherein, redaction user terminal refers to the terminal of R10 versions and its above version, legacy version user terminal refer to R10 with
The terminal of lower version.
S306, according to shared by the high-rise indicated number of reception, the CFI information identified and user terminal version determine PDCCH
Running time-frequency resource.
User terminal is after receiving high-rise indicated number and identifying CFI information, further according to each CFI in different terminals version
OFDM symbol number corresponding to information determines the video resource shared by current PDCCH.
The use of active state is currently in the channel quality and/or cell that the embodiment is fed back according to uplink data
Amount mesh can determine high-rise indicated number parameter, can believed based on the parameter with the running time-frequency resource shared by dynamic control PDCCH
Road quality is preferable and/or cell in be currently at active state number of users it is less in the case of, it is less to be that user distributes
PDCCH running time-frequency resources, channel quality is poor and/or cell in be currently at active state number of users it is more in the case of
More PDCCH running time-frequency resources are distributed for user, to ensure being properly received for the DCI of PDCCH channel bearings.
Further, after step S306, it is determined that PDCCH shared by running time-frequency resource in can pass through blind Detecting
Method detect the Downlink Control Information DCI that PDCCH is carried.
In an example, high-rise indicated number can be determined by following step：
It is more than in the channel quality of uplink data feedback in setting channel quality thresholds and/or cell and is currently at work
The number of users of jump state be less than setting number of users in the case of, set high-rise indicated number be designated as redaction user terminal with it is old
1 to 3 full bandwidth orthogonal frequency division multiplex OFDM symbol of version user terminal distribution is carrying DCI；
It is less than or equal in setting channel quality thresholds and/or cell currently locate in the channel quality of uplink data feedback
In the case that the number of users of active state is more than or equal to setting number of users, high-rise indicated number is set to be designated as redaction user
3 to 5 full bandwidth OFDM symbols of terminal distribution to carry DCI information, for legacy version user terminal distribute 1 to 3 full bandwidth
OFDM symbol is carrying DCI.
Specifically, it is true according to the high-rise indicated number of reception, the CFI information identified and user terminal version in step S306
The step of determining the running time-frequency resource shared by PDCCH can include：
Redaction user terminal, which is designated as, in high-rise indicated number distributes 1 to 3 full bandwidth OFDM with legacy version user terminal
In the case of symbol, correspondingly determine that PDCCH takes the 1st full bandwidth in a subframe according to the CFI information identified
OFDM symbol, preceding 2 full bandwidth OFDM symbols or preceding 3 full bandwidth OFDM symbols；
Redaction user terminal, which is designated as, in high-rise indicated number distributes 3 to 5 full bandwidth OFDM symbols to carry DCI's
In the case of, according to the CFI information identified correspondingly determine PDCCH take a subframe in preceding 4 full bandwidth OFDM symbols,
Preceding 5 full bandwidth OFDM symbols or preceding 3 full bandwidth OFDM symbols.
The number of users that active state is currently in channel quality and/or cell based on uplink data feedback can
Dynamically to adjust the CFI information carried in high-rise indicated number and/or PCFICH.
The use of active state is currently in the channel quality and/or cell fed back in network side according to uplink data
During change configuration of the adjustment to CFI information of amount purpose, for legacy version user terminal, in order to consider compatibility issue, no matter
High-rise indicated number is 0 or 1,1-3 full bandwidth OFDM symbol before being distributed all in accordance with CFI information in 1 subframe for PDCCH.When
When channel quality is preferable, the full bandwidth OFDM symbol that CFI information configurations are less can be controlled, when channel quality is bad, can be with
The more full bandwidth OFDM symbol of CFI information configurations is controlled, can be with when the number of users that active state is in cell is more
CFI information is controlled as the less full bandwidth OFDM symbol of each user configuration, when the number of users that active state is in cell
When more, CFI information can be controlled as the more full bandwidth OFDM symbol of each user configuration.
In addition, in response to the change of high-rise indicated number, the present sub-frame to be changed in high-rise indicated number and subsequently finger
In fixed subframe, network side reconfigures CFI information, to indicate 3 full bandwidth OFDM symbols before PDCCH occupancy, for example, no matter
It is 0 or 1 in high-rise indicated number, is 2 by CFI information configurations, now, corresponding PDCCH takes first 3 in 1 subframe
Full bandwidth OFDM symbol.
It is pointed out that high-rise indicated number is different from the adjustment cycle of CFI information, because network side is in each subframe
CFI information, therefore, the uplink signal-channel quality and/or each subframe that CFI information can be according to each subframe are sent in PCFICH
The number of users and corresponding momentary threshold value that active state is currently in middle cell are come（That is, each subframe）Adjust CFI
Information.With the adjustment cycle phase ratio of CFI information, high-rise indicated number then has the longer adjustment cycle, it is specific adjust the cycle can be with
Configured, will be set in the cycle in the uplink signal-channel quality of each subframe and cell during each subframe in active according to demand
The number of users of state is compared to adjust high-rise indicated number after carrying out statistical average with corresponding statistics threshold value.Wherein,
Momentary threshold value can be mutually identical or different with statistics threshold value.
Due to that during high level configuration conversion, may occur that PDCCH symbolic numbers are uncertain within a period of time
Situation, flase drop of the user terminal to PDCCH is may result in, therefore, if by CFI information before and after the change of high-rise indicated number
It is arranged to 2, it is possible to the flase drop to PDCCH is effectively avoided in front and rear this section of uncertain time of change.After system is stable, then
CFI information is adjusted according to number of users active in upper and lower channel quality and cell.
Next, such scheme is described further by an instantiation.
In lte-a system, when sending downlink data, according to the channel information of uplink data feedback, when channel matter
Amount preferably or in when（For example, SNR>=0dB）Or be currently in cell active state UE numbers it is less when
（For example, UE numbers=<4）, the symbolic number that network side configures PDCCH in a subframe is 1,2 or 3, now, network side configuration
High-rise indicated number is 0, and the CFI for the PCFICH channels being arranged in a subframe is designated as 0,1 or 2, while at this
DCI needed for the UE in active state can be transmitted in preceding 1,2 or 3 OFDM symbol of the full bandwidth in subframe with running time-frequency resource to believe
Breath, remaining symbol transmission PDSCH.
When the average channel quality information in a period of time internal feedback is poor（For example, SNR<0dB）Or a period of time
When the average UE numbers in active state are more in interior cell（For example, UE numbers>4）, in a subframe, network side configuration
High-rise indicated number is 1, when the CFI of configuration PCFICH channels is designated as 0,1 or 2, to redaction UE（R10 and follow-up
Version）, the corresponding running time-frequency resource transmission of its DCI information preceding 4,5 or 3 OFDM symbols of the subframe full bandwidth；To early stage
Version UE（R8, R9 version）, still transmit its DCI letters using the corresponding running time-frequency resource of preceding the 1 of full bandwidth, 2 or 3 OFDM symbol
Breath, i.e. the high-rise indicated number of configuration is not acted on early version UE.
Because PCFICH is fixed in subframe resource location fixed in first OFDM symbol, therefore UE sides are receiving
During downlink information, according to the first of each subframe predefined PCFICH channel distribution of OFDM symbol, to each subframe
Its CFI information is identified first, judges its required DCI information is in the range of which running time-frequency resource in the subframe.
When UE is earlier version, to the high-rise indicated number of arbitrary disposition, when CFI configured informations are respectively 0,1 or 2
When, DCI information of the blind Detecting needed for it in 1,2 or 3 OFDM symbol before the UE is then corresponded in the subframe；When UE is new
During version, when high-rise indicated number is 0 while corresponding CFI information is respectively 0,1 or 2, the UE is corresponding in the subframe
DCI information of the blind Detecting needed for it in preceding 1,2 or 3 OFDM symbol, when high-rise indicated number is 1 corresponding CFI information point simultaneously
Not Wei 0,1 or 2 when, the UE it is corresponding in the subframe before DCI letter of the blind Detecting needed for it in 4,5 or 3 OFDM symbols
Breath.
Network side is according to the change for the UE numbers that active state is in the change of channel quality and cell to descending chain
PDCCH quantity is reset in every subframe of road configuration.But during high level configuration conversion, it is possible that one section
The uncertain situation of time system PDCCH symbolic numbers, because working as high-rise indicated number before changing into 1 or 0, if CFI information takes 0
Or 1, UE may be caused correctly to detect the DCI information in PDCCH, therefore, in the front and rear setting of high-rise indicated number change
In, it is 2 by CFI information settings, redaction UE PDCCH resource is always preceding 3 OFDM symbols of subframe, this avoid
Occurs the problem of PDCCH detections are wrong in uncertain time, as shown in Figure 4.
It will appreciated by the skilled person that realize that the whole of above method embodiment and part steps can pass through
Programmed instruction related hardware is completed, and foregoing program can be stored in a computing device read/write memory medium, the journey
Sequence upon execution, execution the step of including above method embodiment, and foregoing storage medium can be including ROM, RAM, magnetic disc
With CD etc. is various can be with the medium of store program codes.
Fig. 5 is the structural representation of the mobile terminal of disclosure one embodiment.
As shown in figure 5, the mobile terminal 50 in the embodiment can include high-rise indicated number receiving unit 502, CFI information
Recognition unit 504 and PDCCH take resource determining unit 506.Wherein,
High-rise indicated number receiving unit 502, the high-rise indicated number sent for receiving network side by RRC signaling, wherein,
The number of users of active state is currently in the channel quality and/or cell that high-rise indicated number is fed back based on uplink data
Determined；
CFI information identificating units 504, for according to the predefined distribution to PCFICH, identifying in PCFICH and carrying
CFI information；
PDCCH takes resource determining unit 506, for the high-rise indicated number according to reception, the CFI information and use that identify
Family terminal versions determine the running time-frequency resource shared by PDCCH.
The use of active state is currently in the channel quality and/or cell that the embodiment is fed back according to uplink data
Amount mesh can determine high-rise indicated number parameter, can believed based on the parameter with the running time-frequency resource shared by dynamic control PDCCH
Road quality is preferable and/or cell in be currently at active state number of users it is less in the case of, it is less to be that user distributes
PDCCH running time-frequency resources, channel quality is poor and/or cell in be currently at active state number of users it is more in the case of
More PDCCH running time-frequency resources are distributed for user, to ensure being properly received for the DCI of PDCCH channel bearings.
Fig. 6 is the structural representation of the mobile terminal of another embodiment of the disclosure.
As shown in fig. 6, compared with the embodiment in Fig. 5, the mobile terminal 60 in the embodiment can also include：
DCI detection units 602, for it is determined that PDCCH shared by running time-frequency resource in examined by the method for blind Detecting
Measure the DCI that PDCCH is carried.
Further, PDCCH takes resource determining unit and is designated as redaction user terminal and old edition in high-rise indicated number
In the case that this user terminal distributes 1 to 3 full bandwidth OFDM symbol, PDCCH is correspondingly determined according to the CFI information identified
Take the 1st full bandwidth OFDM symbol, preceding 2 full bandwidth OFDM symbols or the preceding 3 full bandwidth OFDM symbols in a subframe；
In the case where high-rise indicated number is designated as redaction user terminal 3 to 5 full bandwidth OFDM symbols of distribution to carry DCI,
CFI information according to identifying correspondingly determine PDCCH take preceding 4 full bandwidth OFDM symbols in a subframe, first 5 it is complete
Bandwidth OFDM symbol or preceding 3 full bandwidth OFDM symbols, wherein, redaction user terminal refers to R10 versions and its above version
Terminal, legacy version user terminal refer to the terminal of below R10 versions.
Fig. 7 is the structural representation that the dynamic of disclosure one embodiment improves the system of the PDCCH capacity upper limit.
As shown in fig. 7, the system 70 in the embodiment can include the network equipment 702 and mobile terminal 704, wherein, move
Dynamic terminal 704 can be realized by previous embodiment.
Wherein, the channel quality that the network equipment is fed back in uplink data is more than setting channel quality thresholds and/or small
Be currently in area active state number of users be less than setting number of users in the case of, set high-rise indicated number to be designated as new edition
This user terminal distributes 1 to 3 full bandwidth OFDM symbol to carry DCI with legacy version user terminal；In uplink data
The number of users that the channel quality of feedback is less than or equal in setting channel quality thresholds and/or cell be currently at active state is big
In the case of equal to setting number of users, set high-rise indicated number to be designated as redaction user terminal and distribute 3 to 5 full bandwidths
OFDM symbol is carrying DCI, 1 to 3 full bandwidth OFDM symbol is distributed for legacy version user terminal carrying DCI；Wherein,
Redaction user terminal refers to the terminal of R10 versions and its above version, and legacy version user terminal refers to the terminal of below R10 versions.
Further, the network equipment in response to high-rise indicated number change, in the current son that high-rise indicated number changes
In frame and follow-up given sub-frame, CFI information is reconfigured, to indicate 3 full bandwidth OFDM symbols before PDCCH occupancy.
Further, work is currently in the channel quality and/or cell that the network equipment feeds back according to uplink data
Configuration of the change adjustment of the number of users of jump state to CFI information.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and its
The difference of his embodiment, identical and similar part can be with cross-reference between each embodiment.For device embodiment
For, because it is substantially similar to embodiment of the method, so description is fairly simple, related part may refer to embodiment of the method
Partial explanation.
Disclosure above-described embodiment compared with the prior art for, have the following advantages that and effect：
（1）In the case of intra-cell users heavier loads, " low discharge, long online " especially to present generally existing
Form of service, above-described embodiment can provide bigger power system capacity, because if most 3 of OFDM symbol, it can be accommodated
PDCCH resource-constrained, to the user that should be able to be accommodated（UE）Number is also limited.If increase OFDM symbol number, natural PDCCH
Capacity boost, to the user that should be able to be accommodated（UE）Number can also be lifted.In that way it is possible to caused situation is descending for transmitting
The channel PDSCH resources of data service reduce, but to " low discharge, long online " business for, such case is to close very much
Suitable, i.e., the data transmitted every time all very littles, while it is also required to a control signaling.
（2）In the case where system wireless channel conditions are very poor, the embodiment of the present disclosure can provide more control channels
Resource is to lift the transmission reliability of control channel.
（3）Standard as defined in embodiment of the present disclosure PDCCH transmission not original to system is modified with specification, is only
The resource of its downlink control channel is extended using the designated symbol mapping ruler for changing PCFICH.
（4）Earlier version UE is taken into account simultaneously, there is system rear mutually compatible, change systematic cost is extremely low.
Although describe the disclosure with reference to exemplary embodiment, it should be appreciated that the disclosure is not limited to above-mentioned exemplary
Embodiment.It will be obvious to those skilled in the art that it can be changed under conditions of without departing substantially from the scope of the present disclosure and spirit
Exemplary embodiments mentioned above.The scope of appended claim should be endowed most wide explanation, such to be repaiied comprising all
Change and equivalent 26S Proteasome Structure and Function.
Claims (13)
1. a kind of method that dynamic improves physical downlink control channel PDCCH maximum size, it is characterised in that including：
The high-rise indicated number that network side is sent by radio resource control RRC signaling is received, wherein, the high-rise indicated number is based on
The number of users that active state is currently in the channel quality and/or cell of uplink data feedback is determined；
According to the predefined distribution to Physical Control Format Indicator Channel PCFICH, the control lattice carried in PCFICH are identified
Formula indicates CFI information；
Time-frequency money according to shared by the high-rise indicated number of reception, the CFI information identified and user terminal version determine PDCCH
Source.
2. the method that dynamic according to claim 1 improves the PDCCH capacity upper limit, it is characterised in that methods described is also wrapped
Include：
It is determined that PDCCH shared by running time-frequency resource in descending control that PDCCH carried detected by the method for blind Detecting
Information DCI processed.
3. the method that dynamic according to claim 1 improves the PDCCH capacity upper limit, it is characterised in that pass through following step
Determine the high-rise indicated number：
It is more than to be currently in setting channel quality thresholds and/or cell in the channel quality of uplink data feedback and enlivens shape
In the case that the number of users of state is less than setting number of users, high-rise indicated number is set to be designated as redaction user terminal and legacy version
User terminal distributes 1 to 3 full bandwidth orthogonal frequency division multiplex OFDM symbol to carry DCI；
It is less than or equal to be currently at work in setting channel quality thresholds and/or cell in the channel quality of uplink data feedback
In the case that the number of users of jump state is more than or equal to setting number of users, high-rise indicated number is set to be designated as redaction user terminal
3 to 5 full bandwidth OFDM symbols are distributed to carry DCI information, distribute 1 to 3 full bandwidth OFDM for legacy version user terminal
Symbol is carrying DCI；
Wherein, the redaction user terminal refers to the terminal of R10 versions and its above version, legacy version user terminal refer to R10 with
The terminal of lower version.
4. the method that dynamic according to claim 3 improves the PDCCH capacity upper limit, it is characterised in that according to the height of reception
The step of layer indicated number, the CFI information identified and user terminal version determine the running time-frequency resource shared by PDCCH includes：
Redaction user terminal, which is designated as, in high-rise indicated number distributes 1 to 3 full bandwidth OFDM symbol with legacy version user terminal
In the case of, correspondingly determine that PDCCH takes the 1st full bandwidth OFDM in a subframe and accorded with according to the CFI information identified
Number, preceding 2 full bandwidth OFDM symbols or preceding 3 full bandwidth OFDM symbols；
Redaction user terminal, which is designated as, in high-rise indicated number distributes 3 to 5 full bandwidth OFDM symbols to carry DCI situation
Under, correspondingly determine that PDCCH takes preceding 4 full bandwidth OFDM symbols in a subframe, preceding 5 according to the CFI information identified
Individual full bandwidth OFDM symbol or preceding 3 full bandwidth OFDM symbols.
5. the method that dynamic according to claim 1 improves the PDCCH capacity upper limit, it is characterised in that methods described is also wrapped
Include：
In response to the change of high-rise indicated number, in the present sub-frame to be changed in high-rise indicated number and follow-up given sub-frame,
Network side reconfigures CFI information, to indicate 3 full bandwidth OFDM symbols before PDCCH occupancy.
6. the method that dynamic according to claim 1 improves the PDCCH capacity upper limit, it is characterised in that methods described is also wrapped
Include：
The number of users of active state is currently in the channel quality and/or cell that network side feeds back according to uplink data
Configuration of the change adjustment to CFI information.
A kind of 7. mobile terminal, it is characterised in that including：
High-rise indicated number receiving unit, the high-rise indicated number sent for receiving network side by RRC signaling, wherein, the height
The number of users institute of active state is currently in the channel quality and/or cell that layer indicated number is fed back based on uplink data
It is determined that；
CFI information identificating units, for according to the predefined distribution to PCFICH, identifying the CFI letters carried in PCFICH
Breath；
PDCCH takes resource determining unit, for the high-rise indicated number according to reception, the CFI information identified and user terminal
Version determines the running time-frequency resource shared by PDCCH.
8. mobile terminal according to claim 7, it is characterised in that the mobile terminal also includes：
DCI detection units, for it is determined that PDCCH shared by running time-frequency resource in detected by the method for blind Detecting
The DCI that PDCCH is carried.
9. mobile terminal according to claim 7, it is characterised in that the PDCCH takes resource determining unit in high level
In the case that indicated number is designated as redaction user terminal and legacy version user terminal 1 to 3 full bandwidth OFDM symbol of distribution, root
Correspondingly determine that PDCCH takes the 1st full bandwidth OFDM symbol in a subframe, preceding 2 full bands according to the CFI information identified
Wide OFDM symbol or preceding 3 full bandwidth OFDM symbols；Redaction user terminal, which is designated as, in high-rise indicated number distributes 3 to 5 entirely
In the case that bandwidth OFDM symbol is to carry DCI, correspondingly determine that PDCCH takes a son according to the CFI information identified
Preceding 4 full bandwidth OFDM symbols, preceding 5 full bandwidth OFDM symbols or preceding 3 full bandwidth OFDM symbols in frame, wherein, it is described
Redaction user terminal refers to the terminal of R10 versions and its above version, and legacy version user terminal refers to the terminal of below R10 versions.
10. the system that a kind of dynamic improves the PDCCH capacity upper limit, it is characterised in that including the network equipment and claim 7 to 9
Any one of mobile terminal.
11. the system that dynamic according to claim 10 improves the PDCCH capacity upper limit, it is characterised in that the network is set
The standby channel quality in uplink data feedback, which is more than in setting channel quality thresholds and/or cell, is currently at active state
Number of users be less than setting number of users in the case of, set high-rise indicated number to be designated as redaction user terminal and legacy version and use
Terminal distribution 1 to 3 full bandwidth OFDM symbol in family is carrying DCI；Be less than in the channel quality of uplink data feedback etc.
It is more than or equal to the feelings of setting number of users in the number of users that active state is currently in setting channel quality thresholds and/or cell
Under condition, set high-rise indicated number to be designated as redaction user terminal and distribute 3 to 5 full bandwidth OFDM symbols to carry DCI, be
Legacy version user terminal distributes 1 to 3 full bandwidth OFDM symbol to carry DCI；Wherein, the redaction user terminal refers to
The terminal of R10 versions and its above version, legacy version user terminal refer to the terminal of below R10 versions.
12. the system that dynamic according to claim 10 improves the PDCCH capacity upper limit, it is characterised in that the network is set
The standby change in response to high-rise indicated number, in the present sub-frame to be changed in high-rise indicated number and follow-up given sub-frame, weight
New configuration CFI information, to indicate 3 full bandwidth OFDM symbols before PDCCH occupancy.
13. the system that dynamic according to claim 10 improves the PDCCH capacity upper limit, it is characterised in that the network is set
The change of the standby channel quality fed back according to uplink data and/or the number of users that active state is currently in cell is adjusted
The whole configuration to CFI information.
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| CN105163334B (en) * | 2015-07-10 | 2018-11-16 | 北京拓明科技有限公司 | The dynamic adjusting method and system of LTE cell support maximum number of user ability |
| CN107872834B (en) | 2016-09-28 | 2023-10-24 | 华为技术有限公司 | Information transmission method and device |
| CN108633020B (en) * | 2017-03-23 | 2021-06-15 | 华为技术有限公司 | Control information sending and receiving method and related equipment |
| CN109217997B (en) * | 2017-07-07 | 2021-05-25 | 普天信息技术有限公司 | Method and device for dynamically adjusting CFI in subframe |
| CN110138521B (en) * | 2018-02-02 | 2021-10-19 | 中兴通讯股份有限公司 | eNB physical downlink control channel resource allocation method and device and eNB |
| CN111628852B (en) * | 2019-02-27 | 2021-11-19 | 大唐移动通信设备有限公司 | Resource allocation method and device |
| CN112019312B (en) * | 2019-05-31 | 2023-06-16 | 中兴通讯股份有限公司 | Service processing method and device and Internet of vehicles equipment |
| CN110138536B (en) * | 2019-06-11 | 2022-02-08 | 深圳市锐尔觅移动通信有限公司 | Method and device for sending physical downlink control channel and storage medium |
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