CN106211093B - Group service transmission method and device based on PRACH - Google Patents
Group service transmission method and device based on PRACH Download PDFInfo
- Publication number
- CN106211093B CN106211093B CN201510230879.3A CN201510230879A CN106211093B CN 106211093 B CN106211093 B CN 106211093B CN 201510230879 A CN201510230879 A CN 201510230879A CN 106211093 B CN106211093 B CN 106211093B
- Authority
- CN
- China
- Prior art keywords
- group
- prach
- cqi
- base station
- nack message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a kind of group service transmission method and device for being based on Physical Random Access Channel (Physical Random Access Channel, hereinafter referred to as: PRACH).This method comprises: base station is pre-configured with PRACH resource, PRACH resource includes: the corresponding relationship of each PRACH and CQI grade in N group PRACH and every PRACH group.Group UE of the base station into group sends a notification message, notification message includes: group RNTI, the configuration information of carrying and PRACH resource, nack message is fed back to by base station by PRACH resource for group UE, base station is when having detected that UE feeds back nack message, the desired CQI of UE of feedback nack message, the MCS that base station carries out retransfer scheduling according to the desired CQI of at least one UE of acquisition and adjustment just passes next time are obtained by the corresponding CQI grade of PRACH of the feedback nack message detected.The accuracy of group service transmission can be improved in group service transmission method and device provided by the invention based on PRACH, also dispersible to interfere caused by this cell and adjacent cell.
Description
Technical field
The present invention relates to trunking communicating technology field more particularly to a kind of group service transmission method based on PRACH and
Device.
Background technique
With the fast development of cluster communication, in long term evolution (Long Term Evolution, hereinafter referred to as: LTE) public affairs
Net system supports cluster communication to have become trend of the times.Basic service in cluster communication is group call, in a group
There is multiple user equipmenies (User Equipment, hereinafter referred to as: UE).In current LTE public network system, multimedia broadcast multicast
Business (Multimedia Broadcast Multicast Service, hereinafter referred to as: MBMS) is sent out in the following way
It send: in a multicast/multicast single-frequency network network (Multimedia Broadcast Multicast Service Single
Frequency Network, hereinafter referred to as: MBSFN) all cells in region, are carried on MBMS business channel (MBMS
Traffic Channel, referred to as: MTCH) MBMS business, pass through Physical Multicast Channel in identical MBSFN sub-frame
(Physical Multicast Channel, referred to as: PMCH) sends identical transmission block.But the group that cluster communication provides
Group business is different from MBMS business, if sending one in the entire region MBSFN exists only in several cells in the region MBSFN
Group service, then waste of resource.Therefore, much communication manufacturer proposes group service passing through Physical Downlink Shared Channel
(Physical Downlink Shared Channel, hereinafter referred to as: PDSCH) is sent by the way of point-to-multipoint.The party
Cell where formula can only select that group UE in a wide region MBSFN is sent, to save other without group
The interface-free resources of the cell of UE.
Due to being point-to-multipoint transmission, when a group UE is not properly received the transmission block of PDSCH transmission
When, if to base station, base station is feedback negative confirmation (Negative Acknowledgement, hereinafter referred to as: NACK) information
It is no retransmit and how to retransmit needs being defined.Currently, some manufacturers are directed to wireless heterogeneous networks (Radio
Resource Control, hereinafter referred to as: RRC) the group UE under connected state (CONNECTED) proposes a kind of following group service
Transmission method:
Base station configures hybrid automatic repeat-request (Hybrid automatic to the logic channel of carrying group service
Repeat request, referred to as: HARQ) ACK/NACK indication feedback channel.HARQ ACK/NACK indication feedback channel is
PRACH, for the nack message of group UE to be fed back to base station.When transmission block of the base station in transmission group service, pass through use
The scrambled Physical Downlink Control Channel of the RNTI of group service (Physical Downlink Control Channel, it is simple below
Claim: PDCCH) scheduling information is sent to group UE, transmission block is sent to by group UE by PDSCH.Group UE passes through monitoring
Scheduling information obtained by the scrambled PDCCH of the RNTI of group service, and is received according to the instruction of scheduling information and is carried on PDSCH
Transmission block.When to transmission block decoding error, nack message is generated.Group UE passes through preconfigured PRACH for nack message
Feed back to base station.Finally, base station after sending transmission block, receives feedback channel PRACH.By detection, determine that group UE is
It is no by PRACH feed back nack message, when determine have group UE feed back nack message after, base station initiate HARQ retransmit.
In the transmission process of above-mentioned group service, since the transmission between base station and group UE is point-to-multipoint hair
It send, reports resource for channel quality instruction (channel quality indication, hereinafter referred to as: CQI) is not configured
For RRC connected state group UE and group UE in Idle state, how base station obtains its CQI, thus according to the CQI of group UE
It carries out retransfer scheduling and adjusts subsequent just transmission, be a problem to be solved.
Summary of the invention
The present invention provides a kind of group service transmission method and device based on PRACH, and base station can obtain and be not configured on CQI
The CQI of the RRC connected state group UE of resource and the CQI in Idle state group UE are reported, so as to carry out according to the CQI of group UE
Retransfer scheduling and the subsequent just transmission of adjustment, improve the accuracy that group service transmits.
In a first aspect, the present invention provides a kind of group service transmission method based on Physical Random Access Channel PRACH, packet
It includes:
Base station is pre-configured with PRACH resource, and the PRACH resource includes: each in N group PRACH and every PRACH group
The corresponding relationship of PRACH and channel quality indicator (CQI) grade, the CQI grade be CQI value range or a CQI it is poor
The range of value；
Group UE of the base station into group sends a notification message, and the notification message includes: that group's wireless network faces
When mark RNTI, carrying configuration information and the PRACH resource, for the group UE by the PRACH resource general
Nack message feeds back to the base station, when the group RNTI is that core net indicates that the base station is that the group establishes carrying,
The base station is the group allocation；
Scheduling information is sent to institute by the scrambled physical downlink control channel PDCCH of group RNTI by the base station
Group UE is stated, further includes the PRACH group mark that the group UE is distributed in the base station in the scheduling information, the base station is logical
It crosses Physical Downlink Shared Channel PDSCH and transmission block is sent to the group UE, believed for the group UE according to the scheduling
Breath obtains the PRACH group mark and receives the transmission block on the PDSCH, and when to the transmission block decoding error, root
It is corresponding with CQI grade that each PRACH in corresponding PRACH group is identified according to the CQI of the group UE itself and the PRACH group
Relationship selects a PRACH to feed back nack message；
The base station passes through PRACH pairs of the feedback nack message detected when having detected that UE feeds back nack message
The CQI grade answered obtains the desired CQI of UE of feedback nack message；
The tune that the base station carries out retransfer scheduling according to the desired CQI of at least one UE of acquisition and adjustment just passes next time
Coding mode MCS processed.
Further, when the base station is pre-configured with PRACH resource, further includes:
It presets: when group's UE decoding error, being only greater than or equal to the first BLER in the block error rate BLER that measurement obtains
Again to the base station feedback nack message when threshold value.
Further, the PRACH resource further includes period and the biasing of every PRACH group, and the base station is pre-configured with
When PRACH resource, further includes:
Preset: when group's UE decoding error, group UE is in the corresponding subframe of specified biasing of each period according to
The newest CQI of group UE itself and the PRACH group identify the pass corresponding with CQI grade each PRACH in corresponding PRACH group
System selects a PRACH to feed back nack message.
Further, the base station carries out retransfer scheduling according to the desired CQI of at least one UE of acquisition, comprising:
The base station sends the scheduling information retransmitted by the PDCCH and gives group UE, and will be transmitted by the PDSCH
Block is sent to group UE.
Further, when the base station is pre-configured with PRACH resource, further includes:
The timing relationship between subframe that the PRACH subframe and PDSCH for presetting feedback nack message retransmit；
The base station carries out retransfer scheduling according to the desired CQI of at least one UE of acquisition, comprising:
The base station does not send PDCCH in the subframe that PDSCH is retransmitted, according to just pass identical scheduling information and pass through
PDSCH sends transmission block, receives the PDSCH according to the scheduling information just passed in the subframe that PDSCH is retransmitted for the UE
Transmission block；
Alternatively,
When the base station is pre-configured with PRACH resource, further includes:
Prespecified: the base station is only once retransmitted, and feeds back the UE of nack message to the transmission block decoding received
The transmission block is abandoned when mistake.
Further, when the base station is pre-configured with PRACH resource, further includes:
It presets the PRACH subframe of group UE feedback nack message and is sent by Physical HARQ Indicator Channel PHICH
Confirm the timing relationship between the PHICH subframe of ACK information, presets the PRACH group mark and PHICH of feedback nack message
The mapping relations of code channel；
The base station carries out retransfer scheduling according to the desired CQI of at least one UE of acquisition, comprising:
The base station sends ACK information by PHICH when defined PDSCH re-transmission subframe downlink resource is inadequate to lead to
Group UE is known without non-adaptive re-transmission, and the UE for feeding back nack message receives PHICH according to the timing relationship.
Second aspect, the present invention provide a kind of group service transmission method based on Physical Random Access Channel PRACH, packet
It includes:
User equipment in group UE receives the notification message that the base station is sent, and the notification message includes: group's wireless network
Network temporary identifier RNTI, the configuration information of carrying and PRACH resource, the PRACH resource include: N group PRACH and each
The corresponding relationship of each PRACH and channel quality indicator (CQI) grade in PRACH group, the CQI grade are the model of a CQI value
It encloses or the range of a CQI difference；
The group UE receives the base station and is sent by the scrambled physical downlink control channel PDCCH of the group RNTI
Scheduling information, further include the PRACH group mark that the group UE is distributed in the base station in the scheduling information, described in reception
The transmission block that base station is sent by Physical Downlink Shared Channel PDSCH；
The group UE obtains the PRACH group according to the scheduling information and identifies, to the transmission block decoding error
When, each PRACH and CQI grade in corresponding PRACH group are identified according to the CQI of the group UE itself and the PRACH group
Corresponding relationship select PRACH to feed back nack message, for the base station when having detected that UE feeds back nack message, lead to
The corresponding CQI grade of PRACH for crossing the feedback nack message detected obtains the desired CQI of UE of feedback nack message, and root
Retransfer scheduling and the adjustment first modulation coding scheme MCS passed next time are carried out according to the desired CQI of at least one UE of acquisition.
Further, described to be identified in corresponding PRACH group according to the CQI of the group UE itself and the PRACH group
Each PRACH and the corresponding relationship of CQI grade select a PRACH to feed back nack message, comprising:
The group UE is only when the obtained block error rate BLER of measurement is greater than or equal to the first BLER threshold value, according to the group
The CQI of group UE itself and the PRACH group identify each PRACH and the corresponding relationship of CQI grade in corresponding PRACH group and select
One PRACH feeds back nack message.
Further, the PRACH resource further includes period and the biasing of every PRACH group, described according to the group
The CQI of UE itself and the PRACH group identify each PRACH and the corresponding relationship of CQI grade selection one in corresponding PRACH group
A PRACH feeds back nack message, comprising:
The group UE is in the corresponding subframe of specified biasing of each period according to the newest CQI of the group UE itself and institute
It states PRACH group and identifies one PRACH feedback NACK of each PRACH and the selection of the corresponding relationship of CQI grade in corresponding PRACH group
Information.
The third aspect, the present invention provide a kind of base station, comprising:
Configuration module, for being pre-configured with PRACH resource, the PRACH resource includes: N group PRACH and every PRACH
The corresponding relationship of each PRACH and channel quality indicator (CQI) grade in group, the CQI grade are the range or one of a CQI value
The range of a CQI difference；
First sending module sends a notification message for the group UE into the first group, and the notification message includes: group
Group radio network temporary identifier RNTI, the configuration information of carrying and the PRACH resource, pass through described for the group UE
Nack message is fed back to the base station by PRACH resource, and the group RNTI is that core net indicates that the base station is the first group
When establishing carrying, the base station is first group allocation；
Second sending module, for being believed scheduling by the scrambled physical downlink control channel PDCCH of group RNTI
Breath is sent to the group UE, further includes the PRACH group mark that the group UE is distributed in the base station in the scheduling information,
Transmission block is sent to the group UE by Physical Downlink Shared Channel PDSCH by the base station, for the group UE according to
The scheduling information obtains the PRACH group mark and receives the transmission block on the PDSCH, and to the transmission block decoding
When mistake, each PRACH and CQI in corresponding PRACH group is identified according to the CQI of the group UE itself and the PRACH group
The corresponding relationship of grade selects a PRACH to feed back nack message；
Module is obtained, for passing through the feedback nack message detected when having detected that UE feeds back nack message
The corresponding CQI grade of PRACH obtains the desired CQI of UE of feedback nack message；
Processing module carries out retransfer scheduling and adjustment next time just for the desired CQI of at least one UE according to acquisition
The modulation coding scheme MCS of biography.
Fourth aspect, the present invention provide a kind of user equipment, comprising:
First receiving module, the notification message sent for receiving the base station, the notification message includes: that group is wireless
Network Temporary Identifier RNTI, the configuration information of carrying and PRACH resource, the PRACH resource include: N group PRACH and each
The corresponding relationship of each PRACH and channel quality indicator (CQI) grade in PRACH group, the CQI grade are the model of a CQI value
It encloses or the range of a CQI difference；
Second receiving module passes through the scrambled Physical Downlink Control Channel of group RNTI for receiving the base station
The scheduling information that PDCCH is sent further includes that the base station is distributed to the PRACH group of the group UE and marked in the scheduling information
Know, receives the transmission block that the base station is sent by Physical Downlink Shared Channel PDSCH；
Module is obtained, is identified for obtaining the PRACH group according to the scheduling information；
Processing module, for when to the transmission block decoding error, according to the CQI of the group UE itself and described
PRACH group identifies each PRACH and the corresponding relationship of CQI grade in corresponding PRACH group and selects a PRACH feedback negative true
Recognize nack message, for the base station when having detected that UE feeds back nack message, passes through the feedback nack message detected
The corresponding CQI grade of PRACH obtains the desired CQI of UE of feedback nack message, and desired according at least one UE of acquisition
The modulation coding scheme MCS that CQI carries out retransfer scheduling and adjustment just passes next time.
Group service transmission method and device provided by the invention based on PRACH, is pre-configured with by base station for group
Nack message is fed back to the N group PRACH of base station by group UE, and presets each PRACH and CQI grade in every PRACH group
Corresponding relationship, base station can obtain be not configured CQI report resource RRC connected state group UE CQI and in Idle state group
The CQI of UE improves group service and passes so as to the MCS for carrying out retransfer scheduling according to the CQI of group UE and adjustment just passes next time
Defeated accuracy.Moreover, above-mentioned configuration according to the present invention, group UE can feed back NACK by the wherein one group of PRACH configured
Information, therefore can be dispersed and interfered caused by this cell and adjacent cell.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the present invention or technical solution in the prior art
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is of the invention one
A little embodiments for those of ordinary skill in the art without any creative labor, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is that the present invention is based on the flow charts of the group service transmission method embodiment one of PRACH；
Fig. 2 is that the present invention is based on the flow charts of the group service transmission method embodiment two of PRACH；
Fig. 3 is the structural schematic diagram of base station embodiment one of the present invention；
Fig. 4 is the structural schematic diagram of UE embodiment one of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the attached drawing in the present invention, to this
Technical solution in invention is clearly and completely described, it is clear that and described embodiments are some of the embodiments of the present invention,
Instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative labor
Every other embodiment obtained under the premise of dynamic, shall fall within the protection scope of the present invention.
Fig. 1 is that the present invention is based on the flow charts of the group service transmission method embodiment one of PRACH, as shown in Figure 1, this reality
The method for applying example may include:
S100, base station are pre-configured with PRACH resource, and PRACH resource includes: each in N group PRACH and every PRACH group
The corresponding relationship of PRACH and channel quality instruction (Channel Quality Indicator, hereinafter referred to as: CQI) grade, CQI
Grade is the range an of CQI value or the range of a CQI difference.
In N group PRACH, every group of PRACH includes different PRACH, and the PRACH number in every group can be identical or different.
Different PRACH uses different leader sequences.The leader sequence that this N group PRACH is used is to be exclusively used in group UE feedback NACK
Information, therefore can not be influenced by public network user random access.
This N group PRACH is shared by the group of subsequent access base station.
The group UE of S101, base station into group sends a notification message, and notification message includes: that group's wireless network is temporarily marked
Know (Radio Network Temporary Identifier, hereinafter referred to as: RNTI), the configuration information of carrying and PRACH money
Nack message is fed back to base station by PRACH resource for group UE by source, and group RNTI is that core net instruction base station is group
When establishing carrying, base station is group allocation, specifically, when core net instruction base station is that a group establishes carrying, base
Standing is one group RNTI of the group allocation, and establishes corresponding carrying.
When group UE feeds back nack message by one configured dedicated PRACH in the prior art, multiple UE pass through same
A code channel feedback will cause the superposition of multiple UE power on the code channel, cause bursty interference to this cell and adjacent cell, according to
Above-mentioned configuration of the invention makes group UE that can feed back nack message by one group of PRACH in the N group PRACH that configures, when the group
When the PRACH for including in PRACH is greater than 1, UE selects a PRACH to feed back nack message according to default rule, therefore can divide
It dissipates and is interfered caused by this cell and adjacent cell.
Wherein, if with spectrum efficiency/Signal to Interference plus Noise Ratio (Signal to Interference plus
Noise Ratio, hereinafter referred to as: SINR) quality of wireless channel of/CQI value characterization UE when, CQI grade is a spectrum efficiency
Range/SINR range/CQI value range, alternatively, CQI grade be a spectrum efficiency difference range/SINR difference
Range/CQI difference range.
When CQI grade is the range of a CQI value, UE, which is first measured, obtains the spectral efficiency values/SINR value/CQI of itself
Value, then according to range/SINR range/CQI value range of each PRACH in preset PRACH group and spectrum efficiency
Corresponding relationship, select the SINR value/spectral efficiency values/CQI value of itself corresponding PRACH feedback nack message.Tool
Body are as follows: when itself SINR value/spectral efficiency values/CQI value a certain spectrum efficiency range/SINR range/CQI value model
When within enclosing, UE selects the feedback NACK letter of PRACH corresponding to range/SINR range/CQI value range of the spectrum efficiency
Breath.
When CQI grade is the range of a CQI difference, the difference for the CQI that UE asks the CQI of itself and transmission block to use.
Specifically, UE asks modulation coding scheme (Modulation and Coding Scheme, hereinafter referred to as: MCS) institute of transmission block
Corresponding spectral efficiency values/SINR value/CQI value and own spectrum efficiency value/SINR value/CQI value difference, obtain the first difference.
Then, according to range/SINR difference range/CQI difference of each PRACH and spectrum efficiency difference in preset PRACH group
Range corresponding relationship, select a PRACH corresponding to above-mentioned first difference to feed back nack message.Specifically: when first
When difference is within the scope of the range of a certain spectrum efficiency difference/SINR difference range/CQI difference, UE selects the frequency spectrum
PRACH corresponding to the range of efficiency difference/SINR difference range/CQI difference range feeds back nack message.PRACH group
The corresponding relationship of interior PRACH and CQI grade is exemplified below:
The PRACH representative value that every group of PRACH includes is 1,2 or 4.When one group of PRACH includes 4 PRACH, each
PRACH corresponds to a CQI grade, and 4 CQI grades respectively correspond the range an of CQI value or the range of a CQI difference.When
When the quality of wireless channel and CQI grade for using CQI value to characterize UE is the ranges of CQI value, this four CQI grades are as follows: [1,2],
[3,4], [5], [6,7].
Scheduling information is sent to group UE by the scrambled PDCCH of group RNTI by S102, base station, is also wrapped in scheduling information
Include the PRACH group mark that group UE is distributed in base station.Transmission block is sent to group UE by PDSCH by base station.Group UE according to
Scheduling information obtains PRACH group mark and receives the transmission block on PDSCH.When in group some UE to transmission block decoding error
When, which identifies the corresponding relationship of each PRACH and CQI grade in corresponding PRACH group according to CQI the and PRACH group of itself
A PRACH is selected, according to the timing relationship between pre-set PDCCH and PRACH, passes through selection in corresponding subframe
PRACH feeds back nack message.
Wherein, PRACH group mark for example can be PRACH group subscript, can indicate PRACH by domain specific on PDCCH
Group subscript or by PDCCH use first control channel unit (Control Channel Element, hereinafter referred to as:
CCE subscript) indicates PRACH group subscript.CCE subscript can be arranged by base station in advance with the lower target mapping relations of PRACH group.
Specifically, group UE monitors the scrambled PDCCH of group RNTI, receives PDSCH according to the scheduling information on PDCCH
On transmission block and obtain the PRACH group of distribution and identify, such as divided according to the subscript of special domain or CCE on PDCCH
The PRACH group subscript matched.When group's UE decoding error, group UE obtains what current transmission block used according to scheduling information first
CQI value is, for example, CQI1, and then being measured according to itself and obtaining itself desired CQI value is, for example, CQI2.Seek difference CQI1-CQI2
=DELTA_CQI.When CQI grade is the range of a CQI difference, UE selects DELTA_CQI institute from the PRACH group of distribution
Nack message is fed back to base station by the corresponding PRACH of the difference range by the CQI difference range of category.When CQI grade is one
When the range of CQI value, UE selects the range of CQI value belonging to CQI2 from the PRACH group of distribution, corresponding by the range
NACK is fed back to base station by PRACH.
S103, base station pass through PRACH pairs of the feedback nack message detected when having detected that UE feeds back nack message
The CQI grade answered obtains the desired CQI of UE of feedback nack message.
Specifically, the channel quality of UE is time-varying and different in group.In the group UE of decoding error, UE
PRACH is selected according to the channel quality of itself, it may appear that: CQI etc. different UE different since respective channel quality belongs to
Grade (that is: belonging to different CQI value range or CQI difference range) and select different PRACH to feed back nack message.But
Will appear: the channel quality of some UE belongs to same CQI grade by chance, and the PRACH of selection is identical.
Each PRACH in the PRACH group of UE is distributed in base station detection.When detecting: passing through a PRACH in group without any UE
When feeding back nack message, it is believed that current transmission block is properly received by each user.When detected UE by group in some
When PRACH feeds back nack message, the corresponding CQI grade of PRACH by detecting nack message is obtained anti-by the PRACH
Present those of the nack message desired CQI of UE.When base station detects the nack message of multiple PRACH Shang You group UE feedback,
The desired CQI of group UE that nack message is fed back on each PRACH can be obtained.Base station can pass through multiple desired CQI
It carries out retransfer scheduling and adjustment just passes.
It is also wrapped to better disperse the interference caused by this cell and adjacent cell when base station is pre-configured with PRACH resource
It includes:
Preset: when group's UE decoding error, only measurement obtain Block Error Rate (Block Error Rate, below
Referred to as: BLER) it is greater than or equal to the first BLER threshold value Shi Zaixiang base station feedback nack message.First BLER threshold value is to be less than or wait
In the BLER target value of group service.
Further, in order to reduce the PRACH resource for distributing to group UE, the present invention is proposed by the way of frame division multiplexing
PRACH resource is configured, specific as follows:
PRACH resource further includes that the period of every PRACH group and biasing are also wrapped when base station is pre-configured with PRACH resource
It includes:
Preset: the period of PRACH and biasing, when group's UE decoding error, group UE is in the specified biasing of each period
Corresponding subframe identifies each PRACH and CQI etc. in corresponding PRACH group according to the newest CQI and PRACH group of group UE itself
The corresponding relationship of grade selects a PRACH to feed back nack message.
Specifically, it is T when the period, when sub-frame offset is OFFSET, group UE feeds back nack message in following subframe.
SFN MOD T=OFFSET
In above formula, SFN indicates subframe number, and the unit of T and OFFSET are subframe.
Can also further limit, when group UE in nearest a cycle BLER desired value of the BLER close to group service
Or when desired value more than or equal to BLER, then feed back nack message.
S104, base station just pass next time according to the desired CQI progress retransfer scheduling of at least one UE of acquisition and adjustment
MCS。
Specifically, when there is more than one group UE decoding error, base station passes through each in detection PRACH group
PRACH knows the distribution situation of the desired CQI of group UE of feedback nack message.
Base station can select a minimum value in the desired CQI of multiple UE, carry out retransfer scheduling according to the minimum value.This
Sample can guarantee: the group UE of all feedback nack messages can correctly be translated by receiving re-transmission transmission block in group
Code.
Base station can also adjust the MCS just passed according to the minimum value, guarantee that the transmission just passed can be owned in group fastly
UE correct decoding.
Specifically, according to the desired CQI progress retransfer scheduling of at least one UE of acquisition, there are three types of can be real for base station in S104
The mode applied is as follows:
One, base station sends the scheduling information retransmitted by PDCCH and gives group UE, and is sent to transmission block by PDSCH
Group UE.Using adaptive retransmission, group UE monitors the PDCCH that base station is sent for base station at this time, when receiving group RNTI
When scrambled PDCCH, indicate to receive the transmission block sent on PDSCH according to PDCCH.
Two, non-adaptive re-transmission is supported in base station.Specifically, when base station is pre-configured with PRACH resource, further includes:
The timing relationship between subframe that the PRACH subframe and PDSCH for presetting feedback nack message retransmit；
Base station carries out retransfer scheduling according to the desired CQI of at least one UE of acquisition, comprising:
Base station does not send PDCCH in the subframe that PDSCH is retransmitted, according to just pass identical scheduling information pass through PDSCH send out
Transmission block is sent, the group UE for feeding back nack message is received on PDSCH in the subframe that PDSCH is retransmitted according to the scheduling information just passed
Transmission block.Alternatively,
When base station is pre-configured with PRACH resource, further includes:
Prespecified: base station is only once retransmitted, and the group UE for feeding back nack message is wrong to the transmission block decoding of re-transmission
It mistakes and abandons the transmission block.
Base station is only once retransmitted, and feeds back the nack message of the group UE of nack message not repeat request transmission block, instead
The group UE of feedback nack message is in defined subframe according to the transmission block on the scheduling information reception PDSCH just passed.
Three, when base station is pre-configured with PRACH resource, further includes:
Preset the PRACH subframe of group UE feedback nack message and by Physical HARQ Indicator Channel (Physical
The timing relationship between the PHICH subframe of ACK information HARQ Indicator Channel, hereinafter referred to as: PHICH) is sent, in advance
The first mapping relations of PRACH the group mark and PHICH code channel of setting feedback nack message.Group UE is after feeding back nack message
PHICH is received in pre-set PHICH subframe.By on PHICH whether loading ACK information determine whether to carry out it is non-adaptive
It retransmits.
Base station carries out retransfer scheduling according to the desired CQI of at least one UE of acquisition at this time, comprising:
Base station sends ACK information when defined re-transmission subframe downlink resource is inadequate, through PHICH to notify feedback NACK
The group UE of information is without non-adaptive re-transmission.
The group UE for feeding back nack message receives PHICH according to timing relationship, when PHICH instruction is without retransmitting, no
It receives and retransmits in regulation subframe, do not feed back nack message, otherwise receive and retransmit in regulation subframe.Preferably, pre-set hair
Send PDCCH subframe and group UE to feed back the timing relationship between the PRACH subframe of nack message can be according to sending out in 3GPP agreement
Timing relationship between the PDCCH subframe and feeding back ACK/nack message PUCCH subframe of transmitting scheduling information is defined.
Preferably, when supporting non-adaptive re-transmission, the PRACH subframe of pre-set group UE feedback nack message with
The timing relationship that PDSCH retransmits subframe can retransmit subframe according to 3GPP feeding back ACK/nack message PUCCH subframe and PDSCH
Between timing relationship be defined.
Group service transmission method provided in this embodiment based on PRACH, is pre-configured with by base station for group UE
Nack message is fed back to the N group PRACH of base station, and presets pair of each PRACH and CQI grade every PRACH group Nei
Should be related to, base station can obtain be not configured CQI report resource RRC connected state group UE CQI and in RRC Idle state group UE
CQI, thus base station can according to the CQI of group UE carry out retransfer scheduling and adjustment next time just pass MCS, improve group service
The accuracy of transmission.Moreover, above-mentioned configuration according to the present invention, group UE can be fed back by the wherein one group of PRACH configured
Nack message, therefore can be dispersed and interfered caused by this cell and adjacent cell.
Fig. 2 is the present invention is based on the flow chart of the group service transmission method embodiment two of PRACH, and the present embodiment is with group
UE for executing subject as being illustrated, as shown in Fig. 2, the method for the present embodiment may include:
S201, group UE receive the notification message that base station is sent, notification message include: group RNTI, carrying with confidence
Breath and PRACH resource, PRACH resource, which includes: that each PRACH is corresponding with CQI grade in N group PRACH and every PRACH group, closes
System, CQI grade are the range an of CQI value or the range of a CQI difference.
Wherein, in N group PRACH, every group of PRACH includes different PRACH, the PRACH number in every group can it is identical or
It is different.Different PRACH uses different leader sequences.
The leader sequence (preamble) that each PRACH is used in the N group PRACH of base station configuration is dedicated feedback NACK letter
The leader sequence of breath, therefore can not be influenced by public network user random access.
Wherein, if CQI grade is a frequency spectrum when with spectrum efficiency/SINR/CQI value characterization UE quality of wireless channel
Range/SINR range/CQI value range of efficiency, alternatively, CQI grade is poor for range/SINR of a spectrum efficiency difference
The range of value/CQI difference range.
When CQI grade is the range of a CQI value, UE, which is first measured, obtains the SINR value/spectral efficiency values/CQI of itself
Value.Then, according to range/SINR range/CQI value range of each PRACH in preset PRACH group and spectrum efficiency
Corresponding relationship selects a PRACH feedback nack message corresponding to the SINR value/spectral efficiency values/CQI value of itself.Specifically
Are as follows: when itself SINR value/spectral efficiency values/CQI value a certain spectrum efficiency range/SINR range/CQI value range
Within when, UE select PRACH corresponding to range/SINR range/CQI value range of the spectrum efficiency feedback NACK letter
Breath.
When CQI grade is the range of a CQI difference, the difference for the CQI that UE asks the CQI of itself and transmission block to use.
Specifically, UE ask spectral efficiency values/SINR value/CQI value corresponding to the MCS of transmission block and own spectrum efficiency value/SINR value/
The difference of CQI value obtains the first difference.Then, according to the range of each PRACH in preset PRACH group and spectrum efficiency difference/
The corresponding relationship of the range of SINR difference/CQI difference range selects a PRACH feedback corresponding to above-mentioned first difference
Nack message.Specifically: when the first difference is in range/SINR difference range/CQI difference model of a certain spectrum efficiency difference
When within enclosing, UE selects PRACH corresponding to range/SINR difference range/CQI difference range of the spectrum efficiency difference
Feed back nack message.
S202, group UE receive the scheduling information that base station is sent by the scrambled PDCCH of group RNTI, go back in scheduling information
The PRACH group mark that group UE is distributed to including base station, receives the transmission block that base station is sent by PDSCH.
Wherein, PRACH group mark for example can be PRACH group subscript, can indicate PRACH by domain specific on PDCCH
Group subscript indicates PRACH group subscript by the subscript of PDCCH first CCE used.Target under CCE subscript and PRACH group
Mapping relations can be arranged by base station in advance.
S203, group UE obtain PRACH group mark according to scheduling information, when to transmission block decoding error, according to group
CQI the and PRACH group of UE itself identifies each PRACH and the corresponding relationship of CQI grade in corresponding PRACH group and selects one
PRACH feeds back nack message, for base station when having detected that UE feeds back nack message, passes through the feedback nack message detected
The corresponding CQI grade of PRACH obtain the desired CQI of UE of feedback nack message, and it is expected according at least one UE of acquisition
CQI carry out retransfer scheduling and adjustment next time just pass modulation coding scheme MCS.
Specifically, group UE monitors the scrambled PDCCH of group RNTI, receives PDSCH according to the scheduling information on PDCCH
On transmission block and obtain the PRACH group of distribution and identify, such as divided according to the subscript of special domain or CCE on PDCCH
The PRACH group subscript matched.When group's UE decoding error, group UE obtains what current transmission block used according to scheduling information first
CQI value is, for example, CQI1, and then obtaining itself desired CQI value according to measurement is, for example, CQI2.Seek difference CQI1-CQI2=
DELTA_CQI.When CQI grade is the range of a CQI difference, UE is selected belonging to DELTA_CQI from the PRACH group of distribution
CQI difference range, nack message is fed back to by base station by the corresponding PRACH of the difference range.When CQI grade is one
When the range of CQI value, UE selects the range of CQI value belonging to CQI2 from the PRACH group of distribution, corresponding by the range
NACK is fed back to base station by PRACH.
When group UE feeds back nack message by one configured dedicated PRACH in the prior art, multiple UE pass through same
A code channel feedback will cause the superposition of multiple UE power on the code channel, cause bursty interference to this cell and adjacent cell, according to
Above-mentioned transmission method of the invention makes group UE that can feed back nack message by the wherein one group of PRACH configured, when the group
When the PRACH for including in PRACH is greater than 1, UE selects a PRACH to feed back nack message according to default rule, therefore can divide
It dissipates and is interfered caused by this cell and adjacent cell.
In order to better disperse the interference caused by this cell and adjacent cell, according to being pre-configured with for base station, group UE is only
When the block error rate BLER that measurement obtains is greater than or equal to the first BLER threshold value, just according to CQI the and PRACH group of group UE itself
It identifies each PRACH and the corresponding relationship of CQI grade in corresponding PRACH group and selects a PRACH feedback nack message.
Further, in order to reduce the PRACH resource for distributing to group UE, the present invention is proposed by the way of frame division multiplexing
PRACH resource is configured, the PRACH resource of base station configuration further includes period and the biasing of every PRACH group, and group UE is every at this time
The corresponding subframe of one period specified biasing identifies every in corresponding PRACH group according to the newest CQI and PRACH group of group UE itself
A PRACH and the corresponding relationship of CQI grade select a PRACH to feed back nack message.
Specifically, it is T when the period, when sub-frame offset is OFFSET, group UE feeds back nack message in following subframe.
SFN MOD T=OFFSET
In above formula, SFN indicates subframe number, and the unit of T and OFFSET are subframe.
Can also further limiting according to base station, when group UE in nearest a cycle BLER of the BLER close to business
Desired value or desired value more than or equal to BLER, then feed back nack message.
Specifically, according to the desired CQI progress retransfer scheduling of at least one UE of acquisition, there are three types of enforceable sides for base station
Formula is as follows:
One, base station sends the scheduling information retransmitted by PDCCH and gives group UE, and is sent to transmission block by PDSCH
Group UE.Using adaptive retransmission, group UE monitors the PDCCH that base station is sent for base station at this time, when receiving group RNTI
When scrambled PDCCH, indicate to receive the transmission block sent on PDSCH according to PDCCH.
Two, non-adaptive re-transmission is supported in base station.Specifically, when base station is pre-configured with PRACH resource, further includes:
The timing relationship between subframe that the PRACH subframe and PDSCH for presetting feedback nack message retransmit；
Base station carries out retransfer scheduling according to the desired CQI of at least one UE of acquisition, comprising:
Base station does not send PDCCH in the subframe that PDSCH is retransmitted, according to just pass identical scheduling information pass through PDSCH send out
Transmission block is sent, the UE of nack message is fed back and receives according to the scheduling information just passed transmission block on PDSCH in the subframe of re-transmission.Or
Person,
When base station is pre-configured with PRACH resource, further includes:
Prespecified: base station is only once retransmitted, and feeds back the group UE of nack message to the transmission block decoding received
The transmission block is abandoned when mistake.
Base station is only once retransmitted, and feeds back the nack message of the group UE of nack message not repeat request transmission block, instead
The group UE of feedback nack message is in defined subframe according to the transmission block on the scheduling information reception PDSCH just passed.
Three, when base station is pre-configured with PRACH resource, further includes:
It presets the PRACH subframe of group UE feedback nack message and sends PHICH of ACK information by PHICH
Timing relationship between frame presets the mapping relations of PRACH the group mark and PHICH code channel of feedback nack message.UE exists
It feeds back nack message and receives PHICH in pre-set PHICH subframe later.By on PHICH, whether loading ACK information is determined
Whether non-adaptive re-transmission is carried out.
Base station carries out retransfer scheduling according to the desired CQI of at least one UE of acquisition at this time, comprising:
It is anti-to notify to send ACK information by PHICH when defined PDSCH re-transmission subframe downlink resource is inadequate for base station
The group UE of nack message is presented without non-adaptive re-transmission.
The group UE for feeding back nack message receives PHICH according to timing relationship, when PHICH instruction is without retransmitting, no
It receives and retransmits in regulation subframe, do not feed back nack message, otherwise receive and retransmit in regulation subframe.Preferably, pre-set hair
Timing relationship between the PRACH subframe of PDCCH subframe and group UE the feedback nack message of transmitting scheduling information can be according to
The timing relationship between the PDCCH subframe and feeding back ACK/nack message PUCCH subframe of scheduling information is sent in 3GPP agreement
It is defined.
Preferably, when supporting non-adaptive re-transmission, the subframe and PDSCH of pre-set group UE feedback nack message
Subframe can be retransmitted according to 3GPP feeding back ACK/nack message PUCCH subframe and PDSCH by retransmitting the timing relationship between subframe
Between timing relationship be defined.
Group service transmission method provided in this embodiment based on PRACH, group UE are translated to the transmission block received
When code mistake, according to each PRACH in the PRACH group in the preconfigured one group of PRACH of the CQI of group UE itself and base station and
The corresponding relationship of CQI grade selects a PRACH to feed back nack message, so that base station can be by the feedback nack message that detects
The corresponding CQI grade of PRACH obtain the desired CQI of UE of feedback nack message, and according to the desired CQI of at least one UE into
The MCS that row retransfer scheduling and adjustment just pass next time.Therefore base station can obtain the CQI of RRC connected state group UE simultaneously and be in
The CQI of RRC Idle state group UE, so that base station can carry out what retransfer scheduling was just passed with adjustment according to the CQI of group UE next time
MCS improves the accuracy of group service transmission.Moreover, above-mentioned configuration according to the present invention, group UE can be by configuring wherein
One group of PRACH feeds back nack message, therefore can be dispersed and interfere caused by this cell and adjacent cell.
Fig. 3 is the structural schematic diagram of base station embodiment one of the present invention, as shown in figure 3, the base station of the present embodiment may include:
Configuration module 11, the second sending module 13, obtains module 14 and processing module 15 at first sending module 12, wherein configuration module
11 for being pre-configured with PRACH resource, and PRACH resource includes: each PRACH and CQI etc. in N group PRACH and every PRACH group
The corresponding relationship of grade, CQI grade are the range an of CQI value or the range of a CQI difference.First sending module 12 be used for
Group UE in first group sends a notification message, and notification message includes: group RNTI, the configuration information of carrying and PRACH money
Nack message is fed back to base station by PRACH resource for group UE by source, and group RNTI is that core net instruction base station is first
When group establishes carrying, base station is the first group allocation.Second sending module 13 is used to pass through the scrambled PDCCH of group RNTI
Scheduling information is sent to group UE, further includes the PRACH group mark that group UE is distributed in base station in scheduling information, base station passes through
Transmission block is sent to group UE by PDSCH, is obtained PRACH group mark according to scheduling information for group UE and is received PDSCH
Transmission block corresponding PRACH group is identified according to CQI the and PRACH group of group UE itself and when to transmission block decoding error
Interior each PRACH and the corresponding relationship of CQI grade select a PRACH to feed back nack message.Module 14 is obtained for detecting
To when having UE to feed back nack message, feedback NACK is obtained by the corresponding CQI grade of PRACH of the feedback nack message detected
The desired CQI of the UE of information.Processing module 15 is used to carry out retransfer scheduling and tune according to the desired CQI of at least one UE of acquisition
The whole modulation coding scheme MCS just passed next time.
Further, configuration module 11 is also used to preset: when group's UE decoding error, only measuring obtained mistake block
Rate BLER is greater than or equal to the first BLER threshold value Shi Zaixiang base station feedback nack message.
Further, PRACH resource further includes period and the biasing of every PRACH group, and configuration module 11 is also used in advance
Setting: when group's UE decoding error, group UE is newest according to group UE itself in the corresponding subframe of specified biasing of each period
CQI and PRACH group identifies each PRACH and the corresponding relationship of CQI grade in corresponding PRACH group and a PRACH is selected to feed back
Nack message.
Further, processing module 15 is specifically used for sending the scheduling information retransmitted to UE by PDCCH, and passes through
Transmission block is sent to UE by PDSCH.
Further, configuration module 11 be also used to preset feedback nack message PRACH subframe and PDSCH retransmit
Timing relationship between subframe；Processing module 15 is specifically used for base station and in the subframe that PDSCH is retransmitted does not send PDCCH, according to
It just passes identical scheduling information and transmission block is sent by PDSCH, the UE for feeding back nack message is pressed in the subframe that PDSCH is retransmitted
The transmission block on PDSCH is received according to the scheduling information just passed.
Alternatively,
Configuration module 11 is also used to prespecified: base station is only once retransmitted, and feeds back the UE of nack message to re-transmission
Transmission block decoding error when abandon the transmission block.
Further, configuration module 11 is also used to preset the PRACH subframe of group UE feedback nack message and passes through
PHICH send ACK information PHICH subframe between timing relationship, preset feedback nack message PRACH group mark and
The mapping relations of PHICH code channel.Processing module 15 is specifically used for base station when defined re-transmission subframe downlink resource is inadequate, passes through
PHICH sends ACK information to notify group UE without non-adaptive re-transmission, receives for group UE according to timing relationship
PHICH。
The base station of the present embodiment can be used for executing the technical solution of embodiment of the method shown in Fig. 1, realization principle class
Seemingly, details are not described herein again.
Base station provided in this embodiment is pre-configured with by configuration module and nack message is fed back to base station for group UE
N group PRACH, and preset the corresponding relationship of each PRACH and CQI grade every PRACH group Nei, obtaining module can obtain
CQI and CQI in Idle state group UE that CQI reports the RRC connected state group UE of resource is not configured, so that base station can basis
The MCS that the CQI of group UE carries out retransfer scheduling and adjustment just passes next time improves the accuracy of group service transmission.Moreover, root
According to above-mentioned configuration of the invention, group UE can feed back nack message by the wherein one group of PRACH configured, therefore dispersible to this
It is interfered caused by cell and adjacent cell.
Fig. 4 is the structural schematic diagram of group UE embodiment one of the present invention, as shown in figure 4, the group UE of the present embodiment includes:
First receiving module 21, obtains module 23 and processing module 24 at second receiving module 22, wherein the first receiving module 21 is used for
The notification message that base station is sent is received, notification message includes: group RNTI, the configuration information of carrying and PRACH resource, PRACH
Resource includes: the corresponding relationship of each PRACH and CQI grade in N group PRACH and every PRACH group, and CQI grade is a CQI
The range of the range of value or a CQI difference.Second receiving module 22 passes through the scrambled PDCCH of group RNTI for receiving base station
The scheduling information of transmission further includes the PRACH group mark that group UE is distributed in base station in scheduling information, receives base station and pass through
The transmission block that PDSCH is sent.Module 23 is obtained to be used to obtain PRACH group mark according to scheduling information.Processing module 24 is used for
When to transmission block decoding error, according to CQI the and PRACH group of group UE itself identify in corresponding PRACH group each PRACH and
The corresponding relationship of CQI grade selects a PRACH to feed back nack message, is detecting UE feedback nack message for base station
When, the desired CQI of UE of feedback nack message is obtained by the corresponding CQI grade of PRACH of the feedback nack message detected,
And retransfer scheduling and the adjustment first modulation coding scheme MCS passed next time are carried out according to the desired CQI of at least one UE of acquisition.
Further, processing module 24 is specifically used for the block error rate BLER only obtained in measurement and is greater than or equal to the first BLER
When threshold value, pair of each PRACH and CQI grade in corresponding PRACH group are identified according to CQI the and PRACH group of group UE itself
It should be related to one PRACH feedback nack message of selection.
Further, PRACH resource further includes period and the biasing of every PRACH group, and processing module 24 is specifically used for
The corresponding subframe of specified biasing of each period identifies in corresponding PRACH group according to the newest CQI and PRACH group of group UE itself
Each PRACH and the corresponding relationship of CQI grade select a PRACH to feed back nack message.
The UE of the present embodiment can be used for executing the technical solution of embodiment of the method shown in Fig. 2, and realization principle is similar,
Details are not described herein again.
Group UE provided in this embodiment, through processing module when to the transmission block decoding error received, according to group
It is corresponding with the interior each PRACH and CQI grade of the PRACH group in the CQI and the preconfigured one group of PRACH in base station of group UE itself
Relationship selects a PRACH to feed back nack message, so that base station can be corresponding by the PRACH of the feedback nack message detected
CQI grade obtains the desired CQI of UE of feedback nack message, and according to the desired CQI of at least one UE carry out retransfer scheduling and
The MCS that adjustment just passes next time.Therefore base station can obtain be not configured CQI report resource RRC connected state group UE CQI and place
In the CQI of Idle state group UE, so that base station can carry out what retransfer scheduling was just passed with adjustment according to the CQI of group UE next time
MCS improves the accuracy of group service transmission.Moreover, above-mentioned configuration according to the present invention, group UE can be by configuring wherein
One group of PRACH feeds back nack message, therefore can be dispersed and interfere caused by this cell and adjacent cell.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (11)
1. a kind of group service transmission method based on Physical Random Access Channel PRACH characterized by comprising
Base station is pre-configured with PRACH resource, and the PRACH resource includes: each PRACH in N group PRACH and every PRACH group
With the corresponding relationship of channel quality indicator (CQI) grade, the CQI grade is the range an of CQI value or the model of a CQI difference
It encloses；
Group UE of the base station into group sends a notification message, and the notification message includes: that group's wireless network is temporarily marked
Know RNTI, the configuration information of carrying and the PRACH resource, it is by the PRACH resource that negative is true for the group UE
Recognize nack message and feed back to the base station, the group RNTI is that core net indicates that the base station is that the group establishes carrying
When, the base station is the group allocation；
Scheduling information is sent to the group by the scrambled physical downlink control channel PDCCH of group RNTI by the base station
UE is organized, further includes the PRACH group mark that the group UE is distributed in the base station in the scheduling information, the base station passes through object
It manages DSCH Downlink Shared Channel PDSCH and transmission block is sent to the group UE, obtained for the group UE according to the scheduling information
The PRACH group is taken to identify and receive the transmission block on the PDSCH, and when to the transmission block decoding error, according to institute
The CQI and the PRACH group that state group UE itself identify the corresponding relationship of each PRACH and CQI grade in corresponding PRACH group
Select a PRACH feedback nack message；
When having detected that UE feeds back nack message, the PRACH by the feedback nack message detected is corresponding for the base station
CQI grade obtains the desired CQI of UE of feedback nack message；
The base station carries out retransfer scheduling and adjusts the modulation just passed next time to compile according to the desired CQI of at least one UE of acquisition
Code mode MCS.
2. the method according to claim 1, wherein when the base station is pre-configured with PRACH resource, further includes:
It presets: when group's UE decoding error, being only greater than or equal to the first BLER threshold value in the block error rate BLER that measurement obtains
Base station feedback nack message described in Shi Zaixiang.
3. the method according to claim 1, wherein the PRACH resource further includes the period of every PRACH group
And biasing, when the base station is pre-configured with PRACH resource, further includes:
Preset: when group's UE decoding error, group UE is in the corresponding subframe of specified biasing of each period according to the group
The newest CQI of UE itself and the PRACH group identify each PRACH and the corresponding relationship of CQI grade in corresponding PRACH group and select
Select a PRACH feedback nack message.
4. described in any item methods according to claim 1~3, which is characterized in that the base station according to acquisition at least one
The desired CQI of UE carries out retransfer scheduling, comprising:
The base station sends the scheduling information retransmitted by the PDCCH and gives group UE, and is sent out transmission block by the PDSCH
Give group UE.
5. described in any item methods according to claim 1~3, which is characterized in that the base station is pre-configured with PRACH resource
When, further includes:
The timing relationship between subframe that the PRACH subframe and PDSCH for presetting feedback nack message retransmit；
The base station carries out retransfer scheduling according to the desired CQI of at least one UE of acquisition, comprising:
The base station does not send PDCCH in the subframe that PDSCH is retransmitted, according to just pass identical scheduling information pass through PDSCH send out
Transmission block is sent, the UE for feeding back nack message receives the PDSCH according to the scheduling information just passed in the subframe that PDSCH is retransmitted
On transmission block；
Alternatively,
When the base station is pre-configured with PRACH resource, further includes:
Prespecified: the base station is only once retransmitted, when feeding back the transmission block decoding error of the UE of nack message to re-transmission
Abandon the transmission block.
6. described in any item methods according to claim 1~3, which is characterized in that the base station is pre-configured with PRACH resource
When, further includes:
It presets the PRACH subframe of group UE feedback nack message and confirmation is sent by Physical HARQ Indicator Channel PHICH
Timing relationship between the PHICH subframe of ACK information presets the PRACH group mark and PHICH code channel of feedback nack message
Mapping relations；
The base station carries out retransfer scheduling according to the desired CQI of at least one UE of acquisition, comprising:
The base station sends ACK information by PHICH when defined PDSCH re-transmission subframe downlink resource is inadequate to notify group
For group UE without non-adaptive re-transmission, the UE for feeding back nack message receives PHICH according to the timing relationship.
7. a kind of group service transmission method based on Physical Random Access Channel PRACH characterized by comprising
User equipment in group UE receives the notification message that base station is sent, and the notification message includes: that group's wireless network is temporarily marked
Know the configuration information and PRACH resource of RNTI, carrying, the PRACH resource includes: every in N group PRACH and every PRACH group
The corresponding relationship of a PRACH and channel quality indicator (CQI) grade, the CQI grade are the range or a CQI of a CQI value
The range of difference；
The group UE receives the tune that the base station is sent by the scrambled physical downlink control channel PDCCH of the group RNTI
Information is spent, further includes the PRACH group mark that the group UE is distributed in the base station in the scheduling information, receives the base station
The transmission block sent by Physical Downlink Shared Channel PDSCH；
The group UE obtains the PRACH group according to the scheduling information and identifies, when to the transmission block decoding error, root
It is corresponding with CQI grade that each PRACH in corresponding PRACH group is identified according to the CQI of the group UE itself and the PRACH group
Relationship selects a PRACH to feed back negative confirmation nack message, for the base station when having detected that UE feeds back nack message,
The desired CQI of UE of feedback nack message is obtained by the corresponding CQI grade of PRACH of the feedback nack message detected, and
Retransfer scheduling and the adjustment first modulation coding scheme MCS passed next time are carried out according to the desired CQI of at least one UE of acquisition.
8. the method according to the description of claim 7 is characterized in that the CQI according to the group UE itself and described
PRACH group identifies each PRACH and the corresponding relationship of CQI grade in corresponding PRACH group and selects a PRACH feedback NACK letter
Breath, comprising:
The group UE is only when the obtained block error rate BLER of measurement is greater than or equal to the first BLER threshold value, according to the group UE
The CQI of itself and the PRACH group identify each PRACH and the corresponding relationship of CQI grade in corresponding PRACH group and select one
PRACH feeds back nack message.
9. the method according to the description of claim 7 is characterized in that the PRACH resource further includes the period of every PRACH group
And biasing, it is described according to the CQI of the group UE itself and the PRACH group identify in corresponding PRACH group each PRACH and
The corresponding relationship of CQI grade selects a PRACH to feed back nack message, comprising:
The group UE is in the corresponding subframe of specified biasing of each period according to the newest CQI of the group UE itself and described
PRACH group identifies each PRACH and the corresponding relationship of CQI grade in corresponding PRACH group and selects a PRACH feedback NACK letter
Breath.
10. a kind of base station characterized by comprising
Configuration module, for being pre-configured with PRACH resource, the PRACH resource includes: in N group PRACH and every PRACH group
The corresponding relationship of each PRACH and channel quality indicator (CQI) grade, the CQI grade be CQI value range or one
The range of CQI difference；
First sending module sends a notification message for the group UE into the first group, the notification message include: group without
Line Network Temporary Identifier RNTI, the configuration information of carrying and the PRACH resource pass through the PRACH for the group UE
Negative confirmation nack message is fed back to the base station by resource, and the group RNTI is that core net indicates that the base station is first group
When group establishes carrying, the base station is first group allocation；
Second sending module, for being sent out scheduling information by the scrambled physical downlink control channel PDCCH of group RNTI
The group UE is given, further includes the PRACH group mark that the group UE is distributed in the base station in the scheduling information, it is described
Transmission block is sent to the group UE by Physical Downlink Shared Channel PDSCH by base station, for the group UE according to
Scheduling information obtains the PRACH group mark and receives the transmission block on the PDSCH, and to the transmission block decoding error
When, each PRACH and CQI grade in corresponding PRACH group are identified according to the CQI of the group UE itself and the PRACH group
Corresponding relationship select PRACH to feed back nack message；
Module is obtained, for passing through PRACH pairs of the feedback nack message detected when having detected that UE feeds back nack message
The CQI grade answered obtains the desired CQI of UE of feedback nack message；
Processing module carries out what retransfer scheduling just passed next time with adjustment for the desired CQI of at least one UE according to acquisition
Modulation coding scheme MCS.
11. a kind of user equipment characterized by comprising
First receiving module, for receiving the notification message of base station transmission, the notification message includes: that group's wireless network is interim
The configuration information and PRACH resource of RNTI, carrying are identified, the PRACH resource includes: in N group PRACH and every PRACH group
The corresponding relationship of each PRACH and channel quality indicator (CQI) grade, the CQI grade be CQI value range or one
The range of CQI difference；
Second receiving module passes through the scrambled physical downlink control channel PDCCH of group RNTI for receiving the base station
The scheduling information of transmission further includes the PRACH group mark that the group UE is distributed in the base station in the scheduling information, receives
The transmission block that the base station is sent by Physical Downlink Shared Channel PDSCH；
Module is obtained, is identified for obtaining the PRACH group according to the scheduling information；
Processing module is used for when to the transmission block decoding error, according to the CQI and the PRACH of the group UE itself
Group identifies each PRACH and the corresponding relationship of CQI grade in corresponding PRACH group and a PRACH is selected to feed back negative confirmation
Nack message passes through the feedback nack message detected for the base station when having detected that UE feeds back nack message
The corresponding CQI grade of PRACH obtains the desired CQI of UE of feedback nack message, and desired according at least one UE of acquisition
The modulation coding scheme MCS that CQI carries out retransfer scheduling and adjustment just passes next time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510230879.3A CN106211093B (en) | 2015-05-07 | 2015-05-07 | Group service transmission method and device based on PRACH |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510230879.3A CN106211093B (en) | 2015-05-07 | 2015-05-07 | Group service transmission method and device based on PRACH |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106211093A CN106211093A (en) | 2016-12-07 |
| CN106211093B true CN106211093B (en) | 2019-07-16 |
Family
ID=57459684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510230879.3A Active CN106211093B (en) | 2015-05-07 | 2015-05-07 | Group service transmission method and device based on PRACH |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106211093B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106954275A (en) * | 2017-03-02 | 2017-07-14 | 中国电子科技集团公司第七研究所 | Single one-to-many communication means of cell and system |
| CN108990098B (en) * | 2017-06-05 | 2021-09-24 | 成都鼎桥通信技术有限公司 | Retransmission method in cluster system |
| CN109286467B (en) * | 2017-07-19 | 2020-05-15 | 大唐移动通信设备有限公司 | Method and device for acquiring CQI (channel quality indicator) of shared channel and reporting method and device |
| CN109391372B (en) * | 2017-08-11 | 2021-08-13 | 华为技术有限公司 | Communication method and device |
| CN108174356B (en) * | 2017-12-26 | 2021-05-25 | 海能达通信股份有限公司 | Uplink feedback method and device for users in group calling service of broadband cluster system |
| WO2019126985A1 (en) * | 2017-12-26 | 2019-07-04 | 海能达通信股份有限公司 | Uplink feedback method and device for user in group call service of wideband system |
| US10863548B2 (en) * | 2018-04-06 | 2020-12-08 | Qualcomm Incorporated | Group CSI feedback for multicast/broadcast transmission |
| CN115499114A (en) * | 2019-06-14 | 2022-12-20 | Oppo广东移动通信有限公司 | Wireless communication method, receiving end equipment and transmitting end equipment |
| CN113518466B (en) * | 2020-04-09 | 2023-02-28 | 展讯通信（上海）有限公司 | Feedback method and device of multicast broadcast service |
| CN113872736B (en) * | 2020-06-30 | 2023-08-18 | 成都鼎桥通信技术有限公司 | Data transmission method, device, equipment and storage medium |
| CN113938843B (en) * | 2021-09-23 | 2023-04-18 | 广州世炬网络科技有限公司 | Response feedback method, device, terminal and system for multicast service of 5G system |
| CN114143725A (en) * | 2021-12-13 | 2022-03-04 | 中信科移动通信技术股份有限公司 | Broadband cluster call processing method and system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013070029A1 (en) * | 2011-11-11 | 2013-05-16 | Pantech Co., Ltd. | Apparatus and method of performing power headroom report in wireless communication system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130083739A1 (en) * | 2011-10-04 | 2013-04-04 | Sharp Laboratories Of America, Inc. | Devices for random access response scheduling |
-
2015
- 2015-05-07 CN CN201510230879.3A patent/CN106211093B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013070029A1 (en) * | 2011-11-11 | 2013-05-16 | Pantech Co., Ltd. | Apparatus and method of performing power headroom report in wireless communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106211093A (en) | 2016-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106211093B (en) | Group service transmission method and device based on PRACH | |
| CN106211086B (en) | Group service transmission method based on PUCCH | |
| US11510236B2 (en) | Method and apparatus of requesting resource for sidelink retransmission in a wireless communication system | |
| US11729843B2 (en) | Method and apparatus of handling device-to-device resource selection with consideration on discontinuous reception operation in a wireless communication system | |
| CN110999335B (en) | System and method for side-line feedback | |
| US11265132B2 (en) | Enhancing utilization efficiency of radio resources in MBMS | |
| EP2704458B1 (en) | Method and apparatus for semi-persistent scheduling, sps, transmissions | |
| EP2880943B1 (en) | Signaling and channel designs for d2d communications | |
| JP2021503775A (en) | Acknowledgment signaling for radio access networks | |
| US8934393B2 (en) | Local selection of retransmitting device in cooperative cluster to enhance cellular multicast | |
| US20100232373A1 (en) | Resource Allocation in Wireless Communication Systems | |
| CN106560011A (en) | Response message sending, receiving method, and receiving device and transmission equipment | |
| EP2661147A1 (en) | Method and apparatus for determining harq mode | |
| CN107295677B (en) | Feedback method and device for performing idle channel assessment | |
| CN111656722A (en) | Control signaling for radio access networks | |
| KR20160040263A (en) | Method and device for information configuration and data receiving | |
| JP6458736B2 (en) | Method, UE and base station | |
| JP2021503219A (en) | Acknowledgment signaling process for radio access networks | |
| US20220232613A1 (en) | RELIABLE DATA TRANSMISSION OVER MULTIPLE TRPs | |
| CN106034013B (en) | A kind of method and apparatus for device-to-device communication | |
| EP2524472A1 (en) | Multicast service | |
| CN111130723B (en) | Method and device for realizing flexible feedback in V2X transmission and user equipment | |
| CN103096438B (en) | Communication method of periodic service, effective noise bandwidth (eNB) and user experience (UE) | |
| WO2022235377A1 (en) | Activation for semi-persistent scheduling group-common downlink shared channels | |
| CN106301717B (en) | The method of adjustment and device of MCS in group service transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |