CN108667571B - A kind of method and apparatus for realizing hybrid automatic repeat-request - Google Patents
A kind of method and apparatus for realizing hybrid automatic repeat-request Download PDFInfo
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- CN108667571B CN108667571B CN201710193545.2A CN201710193545A CN108667571B CN 108667571 B CN108667571 B CN 108667571B CN 201710193545 A CN201710193545 A CN 201710193545A CN 108667571 B CN108667571 B CN 108667571B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
- H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
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Abstract
The present invention provides a kind of method and apparatus for realizing hybrid automatic repeat-request, method include: when main plot PCell and the status secondary cell SCell it is identical using time domain and frequency domain resource when, if it is determined that being retransmitted, then according to cell parameter selected target cell, stop waiting the retransmission information of HARQ process and be forwarded to the Target cell in duplication source cell, by the Target cell in retransmission process, MAC PDU is retransmitted according to the retransmission information of HARQ processes such as stopping described in clone.It can be according to the channel quality of UE in each cell, optimal cell is chosen to be retransmitted, compared with prior art, improve the probability of successful retransmission of HARQ, due to improving the probability of successful retransmission of HARQ, therefore the data in original soft buffer of HARQ process be can make full use of in receiving end to merge, improves service efficiency of the HARQ process to data and the utilization rate to physical resource.
Description
Technical field
The present invention relates to carrier technology, particularly relate to a kind of method for realizing hybrid automatic repeat-request.
Background technique
Existing long term evolution (LTE, Long Term Evolution) system polymerize (CA, Carrier in carrier wave
Aggregation have the function of in) across cell scheduling.In multiple (service) cells of UE, there are a main plot (PCell,
Primary Cell), one or more secondary cell (SCell, Secondary Cell).No matter uplink or downlink, MAC
There can be independent hybrid automatic repeat-request (HARQ, Hybrid Automatic Repeat in each serving cell
ReQuest) entity.TB block and possible HARQ re-transmission are mapped to the same serving cell, that is to say, that protocol Data Unit
The re-transmission of (MAC PDU, MAC Protocol Data Unit) only occurs in and the MAC PDU is just passed in corresponding cell.
In existing LTE, since the differentiation of PCell and SCell is made a clear distinction between good and evil, the variation of PCell is caused centainly to need to pass through
Switching flow, this is because caused by the inequality of the status PCell and SCell.In addition to this, in existing carrier aggregation technology,
The HARQ of each serving cell be it is independent, HARQ re-transmission can only be in the corresponding cell of new biography.
The cell poor in channel condition occurs if just passed, may not can be transmitted correctly retransmitting, this also anticipates
Taste, since HARQ re-transmission can only occur in the corresponding cell of new biography, if the channel condition of the cell is deteriorated, have at this
The possibility for transmitting failure is transmitted several times in cell.If the corresponding confirmation of the RLC PDU of MAC PDU carrying (AM,
Acknowledged Mode) mode, then it is high-rise to trigger new re-transmission, until the PDU is properly received or reaches maximum
Number of retransmissions, still, this way are a kind of waste for time domain and frequency domain resource.
Summary of the invention
Technical problems to be solved of the embodiment of the present invention are to provide a kind of method for realizing hybrid automatic repeat-request and dress
It sets, the cell to choose optimal is retransmitted, and the probability of successful retransmission of HARQ is improved.
To realize that goal of the invention, the embodiment of the present invention provide a kind of method for realizing hybrid automatic repeat-request, method packet
Include: when main plot PCell and the status secondary cell SCell it is identical using time domain and frequency domain resource when, if it is determined that retransmitted,
Then according to cell parameter selected target cell, replicates the retransmission information for stopping equal HARQ process of source cell and be forwarded to the target
Cell；
By the Target cell in retransmission process, retransmitted according to the retransmission information of HARQ processes such as stopping described in duplication
MAC PDU。
In a preferred embodiment, include: according to cell parameter selected target cell
Channel quality and cell load parameter according to UE in different community, it is selected for each MAC PDU for needing to retransmit
Most suitable cell is as Target cell.
In a preferred embodiment, it replicates the retransmission information for stopping equal HARQ process of source cell and is forwarded to Target cell
Include:
HARQ such as stops at the HARQ process number of processes, the cell index transmitted for the first time, the number of transmissions, the redundancy in duplication source cell
Version is as retransmission information, and the entity information of MAC PDU transmitted, and is sent to the mesh that will be retransmitted
Mark cell.
In a preferred embodiment, centrostigma is that HARQ process number is distributed and safeguarded to each cell；
HARQ such as stops at the HARQ process number of the processes, cell index transmitted for the first time, the number of transmissions, superfluous in duplication source cell
Remaining version is as retransmission information, is that Target cell is coordinated point by centrostigma and after the entity information of MAC PDU that is transmitted
It is used in the HARQ process number of re-transmission, which is the process number of the retransmission process.
In a preferred embodiment, the HARQ process number and MAC PDU of each cell independent maintenance cell itself
Entity information；
HARQ such as stops at the HARQ process number of the processes, cell index transmitted for the first time, the number of transmissions, superfluous in duplication source cell
Remaining version selectes HARQ process number by Target cell as retransmission information, and after the entity information of MAC PDU that is transmitted
And assign the retransmission process；And it indicates to transmit for the first time in the corresponding Physical Downlink Control Channel of MAC PDU entity information
The cell ID of corresponding source cell.
A kind of device for realizing hybrid automatic repeat-request is applied to base station, main plot PCell and secondary cell SCell energy
Enough status are identical to use time domain and frequency domain resource；
Device includes:
Retransmission unit, for according to cell parameter selected target cell, replicating stopping for source cell when determining retransmitted
Equal HARQ process is simultaneously forwarded to the Target cell, by the Target cell in retransmission process, stops according to duplication
The retransmission information of HARQ process retransmits MAC PDU.
In a preferred embodiment, retransmission unit includes:
Target cell chosen module is each for the channel quality and cell load parameter according to UE in different community
The selected most suitable cell out of the MAC PDU for needing to retransmit is as Target cell.
In a preferred embodiment, retransmission unit includes:
Replication module, the HARQ process number for stopping etc. processes for replicating HARQ in source cell, the cell index transmitted for the first time,
The number of transmissions, redundancy versions are as retransmission information, and the entity information of MAC PDU transmitted, and being sent to will be into
The Target cell that row retransmits.
In a preferred embodiment, retransmission unit includes:
Point module is concentrated, for HARQ process number to be distributed and safeguarded for each cell；
And HARQ such as stops at the HARQ process number of processes, the cell index transmitted for the first time, the transmission time in duplication source cell
Number, redundancy versions are as retransmission information, and after the entity information of MAC PDU that is transmitted, for Target cell coordinated allocation
For the HARQ process number of re-transmission, which is the process number of the retransmission process.
In a preferred embodiment, further includes: the cell HARQ process maintenance unit in cell；
Cell HARQ process maintenance unit, for safeguarding the HARQ process number and MAC PDU of the cell itself, and,
HARQ such as stops at the HARQ process number of processes, the cell index transmitted for the first time, the number of transmissions, the redundancy versions conduct in duplication source cell
After retransmission information, and the entity information of MAC PDU that is transmitted, selected HARQ process number simultaneously assigns the retransmission process,
It indicates to transmit corresponding cell ID for the first time in the corresponding Physical Downlink Control Channel of MAC PDU entity information.
Compared with prior art, at least have the advantages that can according to the channel quality of UE in each cell,
It chooses optimal cell to be retransmitted, compared with prior art, improves the probability of successful retransmission of HARQ, on the other hand, due to mentioning
The high probability of successful retransmission of HARQ, therefore it is inner in receiving end to can make full use of original soft buffer of HARQ process (buffer)
Data merge, and improve service efficiency of the HARQ process to data and the utilization rate to physical resource.
Detailed description of the invention
Fig. 1 is that a kind of MAC stops waiting HARQ cloning process flow diagram；
Fig. 2 is the schematic diagram for cloning MAC HARQ；
Fig. 3 is the schematic diagram that centrostigma is each cell distribution and maintenance HARQ process number；
Fig. 4 is the schematic diagram of the HARQ process number of cell independent maintenance cell itself.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.In the following description, such as specific configuration is provided and the specific detail of component is only
In order to help comprehensive understanding the embodiment of the present invention.It therefore, it will be apparent to those skilled in the art that can be to reality described herein
Example is applied to make various changes and modifications without departing from scope and spirit of the present invention.In addition, for clarity and brevity, it is omitted pair
The description of known function and construction.
Carrier wave polymerization (CA, Carrier Aggregation): single terminal UE can polymerize different cells and carry out industry
Business.
Main plot (Primary Cell, PCell): main plot is cell of the work in main band.UE the cell into
Row initial connection is established, or is attached and is re-established；The cell is indicated as main plot in handoff procedure.
Secondary cell (Secondary Cell, SCell): secondary cell is cell of the work on auxiliary frequency band.Once wireless money
Source control protocol (RRC, Radio Resource Control) connection is established, and secondary cell may be configurable to provide additional
Radio resource.RRC handles the third layer information that plane is controlled between UE and UTRAN, and mainly include function: broadcast core net is non-to be connect
The information of layer offer is provided.
Serving cell (Serving Cell): the UE in RRC_CONNECTED state only has if not configuring CA
One Serving Cell, i.e. PCell；If being configured with CA, Serving Cell set is made of PCell and SCell.
The present invention proposes a kind of new across cell scheduling technology of MAC from the angle for improving physical resource utilization rate, right
Existing MAC PDU HARQ retransmission mechanism optimizes, the channel condition according to UE in multiple cells, adaptively selected cell weight
Pass MAC PDU.
In order to realize goal of the invention, needs to introduce and the technology of processes such as stop in MAC layer clone HARQ, the embodiment of the present invention mentions
Go out a kind of method for realizing hybrid automatic repeat-request, as shown in Figure 1, comprising:
Step 101, allow identical use time domain and the frequency domain resource of main plot PCell and the status secondary cell SCell；
Step 102, when determining retransmitted, according to cell parameter selected target cell, stopping for source cell is cloned
The retransmission information of HARQ process is simultaneously forwarded to the Target cell, by the Target cell in retransmission process, according to clone's
It is described to stop that the retransmission information of HARQ process being waited to retransmit MAC PDU.
Using provided technology, it can choose optimal cell according to the channel quality of UE in each cell and carry out
It retransmits, compared with prior art, improves the probability of successful retransmission of HARQ, and the probability of successful retransmission due to improving HARQ,
Can make full use of the inner data of original soft buffer of HARQ process (buffer) in receiving end to merge, improve HARQ into
Service efficiency of the journey to data and the utilization rate to physical resource.
As shown in Fig. 2, in the prior art, (intra-cell) MAC in cell occurs for the scheduling for UE more in cell
In layer, each cell has the function of this.In the embodiment of the present invention, MAC HARQ clone occurs in minizone (inter-
Cell) in MAC, there is a centrostigma on cell, centrostigma is the integrated of control function.MAC HARQ clone can root
According to UE in parameters such as channel quality, the cell loads of different community, the MAC PDU decision retransmitted for each needs is most suitable out
The processes such as serving cell (referred to as: cell) is used as Target cell, and the HARQ that then clone just passes corresponding source cell stops, clone's
Information includes: HARQ process number (HARQ ID), redundancy versions (RV), the number of transmissions, MAC PDU etc., and the HARQ after clone is stopped
Etc. processes be sent to the Target cell newly selected, HARQ re-transmission is carried out by new Target cell.
It in the prior art, is the independent maintenance HARQ in each cell, regardless of whether have the physical layer resources being more suitable for, weight
Biography can only occur in this cell.But as shown in Fig. 2, the invention proposes a kind of centralization HARQ processes, across the cell tune such as to stop
Degree MAC PDU technology include: according to cell parameter selected target cell in a preferred embodiment
Channel quality and cell load parameter according to UE in different community, it is selected for each MAC PDU for needing to retransmit
Most suitable cell is as Target cell out.
In a preferred embodiment, clone source cell stop equal HARQ process and be forwarded to Target cell include:
HARQ such as stops at the HARQ process number of processes, the cell index transmitted for the first time, the number of transmissions, the redundancy in clone source cell
Version is as retransmission information, and the entity information of MAC PDU transmitted, and is sent to the mesh that will be retransmitted
Mark cell.
In Target cell, the retransmission process in Target cell is retransmitted using HARQ retransmission information, if retransmit into
Journey is original HARQ process in Target cell, then does not need to distribute new HARQ process number, if retransmission process is newly to establish
Process, then need to assign new HARQ process number.Retransmission process in Target cell needs to retransmit using HARQ when retransmitting
Information is retransmitted, and needs to notify retransmission information to UE.
In a preferred embodiment, as shown in figure 3,
Centrostigma is that HARQ process number is distributed and safeguarded to each cell；
HARQ such as stops at the HARQ process number of the processes, cell index transmitted for the first time, the number of transmissions, superfluous in clone source cell
Remaining version is as retransmission information, is that Target cell is coordinated point by centrostigma and after the entity information of MAC PDU that is transmitted
It is used in the HARQ process number of re-transmission, which is the process number of the retransmission process.
Centrostigma can participate in the control of part HARQ entity, and HARQ process and dependent, need uniformly to receive in each cell
It is managed to centrostigma, centrostigma distribution and maintenance HARQ process number in each cell (Cell) are suitable for UE selection
Cell carries out HARQ, and multiple cell Optimized Operation retransmits PDU.For the embodiment of centrostigma distribution HARQ process number, according to
HARQ process number it is known that transmit corresponding cell ID for the first time.
In this way, the HARQ process number that can be used for retransmitting in each cell of centrostigma coordinated allocation, according to letter
The information such as road quality distribute suitable Target cell to UE and carry out HARQ re-transmission.When MAC PDU is retransmitted, centrostigma clone
HARQ after clone the processes such as is stopped and is sent to the Target cell that will be retransmitted by HARQ.
In a preferred embodiment, as shown in figure 4,
The HARQ process number of each cell independent maintenance cell itself and the entity information of MAC PDU；
HARQ such as stops at the HARQ process number of the processes, cell index transmitted for the first time, the number of transmissions, superfluous in clone source cell
Remaining version selectes HARQ process number by Target cell as retransmission information, and after the entity information of MAC PDU that is transmitted
And assign the retransmission process；
And it indicates to transmit corresponding source for the first time in the corresponding Physical Downlink Control Channel of MAC PDU entity information small
The cell ID in area.
The cell mark for just needing to indicate to transmit corresponding source cell for the first time when only each cell separately maintains HARQ information
Know.For the embodiment of centrostigma distribution HARQ process number, according to HARQ process number it is known that transmission for the first time corresponds to
Cell ID.
Carry the first MAC PDU transmission for passing cell instruction, it may not be necessary to which centrostigma distributes HARQ process number, it is only necessary to
It indicates to transmit corresponding cell ID for the first time accordingly in the corresponding PDCCH of MAC PDU.
The HARQ process number and new biography data of each cell independent maintenance itself, in case of retransmitting, by MAC HARQ gram
Grand module selects suitable Target cell, and HARQ corresponding in source cell stops to equal progress informations are cloned and notify will
The Target cell of re-transmission, it includes MAC PDU, HARQ process number, the cell index transmitted for the first time, transmission that HARQ, which stops equal progress informations,
Number and redundancy versions etc..
The embodiment of the present invention provides a kind of device for realizing hybrid automatic repeat-request, is applied to base station, main plot PCell
With secondary cell SCell can status it is identical use time domain and frequency domain resource；
Device includes:
Retransmission unit, for according to cell parameter selected target cell, cloning stopping for source cell when determining retransmitted
Equal HARQ process is simultaneously forwarded to the Target cell, by the Target cell in retransmission process, stops according to clone
The retransmission information of HARQ process retransmits MAC PDU.
In a preferred embodiment, retransmission unit includes:
Target cell chosen module is each for the channel quality and cell load parameter according to UE in different community
The selected most suitable cell out of the MAC PDU for needing to retransmit is as Target cell.
In a preferred embodiment, retransmission unit includes:
Cloning module, the HARQ process number for stopping etc. processes for cloning HARQ in source cell, the cell index transmitted for the first time,
The number of transmissions, redundancy versions are as retransmission information, and the entity information of MAC PDU transmitted, and being sent to will be into
The Target cell that row retransmits.
In a preferred embodiment, retransmission unit includes:
Point module is concentrated, for HARQ process number to be distributed and safeguarded for each cell；
And HARQ such as stops at the HARQ process number of processes, the cell index transmitted for the first time, the transmission time in clone source cell
Number, redundancy versions are as retransmission information, and after the entity information of MAC PDU that is transmitted, for Target cell coordinated allocation
For the HARQ process number of re-transmission, which is the process number of the retransmission process.
In a preferred embodiment, further includes: the cell HARQ process maintenance unit in cell；
Cell HARQ process maintenance unit, for safeguarding the HARQ process number and MAC PDU of the cell itself, and,
HARQ such as stops at the HARQ process number of processes, the cell index transmitted for the first time, the number of transmissions, the redundancy versions conduct in clone source cell
After retransmission information, and the entity information of MAC PDU that is transmitted, selected HARQ process number simultaneously assigns the retransmission process,
It indicates to transmit corresponding cell ID for the first time in the corresponding Physical Downlink Control Channel of MAC PDU entity information.
The optimization that the present invention carries out existing MAC PDU HARQ retransmission mechanism, by according to UE multiple cells channel
The adaptively selected cell of condition carries out the scheme of MAC PDU re-transmission.On the one hand the program can be improved compared with existing scheme
The probability of successful retransmission of HARQ, the data that on the other hand can use in the soft buffer of original HARQ are merged, are improved
Service efficiency of the HARQ process to data and the utilization rate to physical resource.
It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text mean it is related with embodiment
A particular feature, structure, or characteristic is included at least one embodiment of the present invention.Therefore, occur everywhere in the whole instruction
" in one embodiment " or " in one embodiment " not necessarily refer to identical embodiment.In addition, these specific features, knot
Structure or characteristic can combine in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be appreciated that the size of the serial number of following each processes is not meant to execute suitable
Sequence it is successive, the execution of each process sequence should be determined by its function and internal logic, the implementation without coping with the embodiment of the present invention
Process constitutes any restriction.
In addition, the terms " system " and " network " are often used interchangeably herein.
It should be understood that the terms "and/or", only a kind of incidence relation for describing affiliated partner, expression can deposit
In three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.
In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
In embodiment provided herein, it should be appreciated that " B corresponding with A " indicates that B is associated with A, can be with according to A
Determine B.It is also to be understood that determine that B is not meant to determine B only according to A according to A, it can also be according to A and/or other information
Determine B.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of method for realizing hybrid automatic repeat-request, which is characterized in that method includes:
When main plot PCell and the status secondary cell SCell it is identical using time domain and frequency domain resource when, if it is determined that carry out weight
It passes, then according to cell parameter selected target cell, comprising: channel quality and cell load parameter according to UE in different community,
The MAC PDU retransmitted is needed to select most suitable cell as Target cell to be each；
Stop waiting the retransmission information of HARQ process and be forwarded to the Target cell in duplication source cell；
By the Target cell in retransmission process, MAC is retransmitted according to the retransmission information of HARQ processes such as stopping described in duplication
PDU；Retransmission process in Target cell needs to be retransmitted using HARQ retransmission information when retransmitting, and needs to retransmit and believe
Breath notice is to UE.
2. the method as described in claim 1, which is characterized in that replicate the retransmission information for stopping equal HARQ process of source cell and turn
Being dealt into Target cell includes:
HARQ such as stops at the HARQ process number of processes, the cell index transmitted for the first time, the number of transmissions, the redundancy versions in duplication source cell
As retransmission information, and the entity information of MAC PDU transmitted, and it is small to be sent to the target that will be retransmitted
Area.
3. method according to claim 2, which is characterized in that
Centrostigma is that HARQ process number is distributed and safeguarded to each cell；
HARQ such as stops at the HARQ process number of processes, cell index, the number of transmissions, the redundancy version transmitted for the first time in duplication source cell
This, as retransmission information, and after the entity information of MAC PDU that is transmitted, is that Target cell coordinated allocation is used by centrostigma
In the HARQ process number of re-transmission, which is the process number of the retransmission process.
4. the method as described in claim 1, which is characterized in that
The HARQ process number of each cell independent maintenance cell itself and the entity information of MAC PDU；
HARQ such as stops at the HARQ process number of processes, cell index, the number of transmissions, the redundancy version transmitted for the first time in duplication source cell
This is selected HARQ process number by Target cell and is assigned as retransmission information, and after the entity information of MAC PDU that is transmitted
Give the retransmission process；And it indicates to transmit correspondence for the first time in the corresponding Physical Downlink Control Channel of MAC PDU entity information
Source cell cell ID.
5. a kind of device for realizing hybrid automatic repeat-request, it is applied to base station, which is characterized in that main plot PCell and auxiliary small
Area SCell being capable of identical use time domain and the frequency domain resource in status；
Device includes:
Retransmission unit, for according to cell parameter selected target cell, replicating stopping for source cell when determining retransmitted
HARQ process is simultaneously forwarded to the Target cell and stops according to duplication by the Target cell in retransmission process
The retransmission information of HARQ process retransmits MAC PDU；Wherein, the retransmission process in Target cell is needed when retransmitting using HARQ
Retransmission information is retransmitted, and needs to notify retransmission information to UE；
Retransmission unit includes: Target cell chosen module, is joined for the channel quality and cell load according to UE in different community
Number needs the selected most suitable cell out of the MAC PDU retransmitted as Target cell to be each.
6. device as claimed in claim 5, which is characterized in that retransmission unit includes:
Replication module, the HARQ process number for stopping etc. processes for replicating HARQ in source cell, the cell index transmitted for the first time, transmission
Number, redundancy versions are as retransmission information, and the entity information of MAC PDU transmitted, and are sent to and will carry out weight
The Target cell passed.
7. device as claimed in claim 6, which is characterized in that retransmission unit includes:
Point module is concentrated, for HARQ process number to be distributed and safeguarded for each cell；
And in duplication source cell HARQ stop etc. the HARQ process number of processes, the cell index transmitted for the first time, the number of transmissions,
Redundancy versions are used for as retransmission information, and after the entity information of MAC PDU that is transmitted for Target cell coordinated allocation
The HARQ process number of re-transmission, the HARQ process number are the process numbers of the retransmission process.
8. device as claimed in claim 6, which is characterized in that further include: the cell HARQ process in cell is safeguarded single
Member；
Cell HARQ process maintenance unit, for safeguarding the HARQ process number and MAC PDU of the cell itself, and, it is replicating
HARQ the HARQ process number of processes, the cell index transmitted for the first time, the number of transmissions, the redundancy versions such as stops as retransmitting in source cell
After information, and the entity information of MAC PDU that is transmitted, selected HARQ process number simultaneously assigns the retransmission process, in MAC
It indicates to transmit corresponding cell ID for the first time in the corresponding Physical Downlink Control Channel of PDU entity information.
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| CN201409228Y (en) * | 2007-09-28 | 2010-02-17 | 交互数字专利控股公司 | Wireless transmitting/receiving unit used for terminating message transmission on enhanced random access information channel |
| WO2014056198A1 (en) * | 2012-10-12 | 2014-04-17 | 华为技术有限公司 | Method and apparatus for transmitting harq feedback |
| CN105490789A (en) * | 2014-10-10 | 2016-04-13 | 电信科学技术研究院 | Data transmission method and device |
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