CN106470497A - A kind of data transmission method, wireless spread-spectrum technology send and receiving entity - Google Patents
A kind of data transmission method, wireless spread-spectrum technology send and receiving entity Download PDFInfo
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- CN106470497A CN106470497A CN201510505550.3A CN201510505550A CN106470497A CN 106470497 A CN106470497 A CN 106470497A CN 201510505550 A CN201510505550 A CN 201510505550A CN 106470497 A CN106470497 A CN 106470497A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1221—Wireless traffic scheduling based on age of data to be sent
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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
- H04L1/1806—Go-back-N protocols
-
- 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
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1858—Transmission or retransmission of more than one copy of acknowledgement message
-
- 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
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/189—Transmission or retransmission of more than one copy of a message
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/30—Peripheral units, e.g. input or output ports
- H04L49/3009—Header conversion, routing tables or routing tags
Abstract
The invention provides a kind of data transmission method, wireless spread-spectrum technology send and receiving entity, solve the problems, such as that RLC data can not ensure the reliability receiving and compared with low time delay when being transmitted simultaneously.The present invention includes：Obtain the pending service data unit SDU information needing to strengthen reliability or reduce time delay, described pending SDU information includes at least one SDU initial data；Replication processes are carried out to the SDU initial data in described pending SDU information, obtains the copy of described SDU initial data；The copy of described SDU initial data and described SDU initial data is processed, obtains protocol Data Unit PDU information；Described PDU information is sent to RLC receiving entity.The present invention passes through to carry out replication processes to the SDU initial data needing to strengthen reception reliability or reduction time delay, while ensureing RLC data reliable reception, reduces due to retransmitting the time delay brought.
Description
Technical field
The present invention relates to the technical field of communications applications, particularly relate to a kind of data transmission method, wireless link
Control and send and receiving entity.
Background technology
Wireless spread-spectrum technology (Radio Link Control, RLC) entity is by one of 3 kinds of data-transmission modes
To configure：Transparent mode (TM), Unacknowledged Mode (UM) and affirmation mode (AM).
AM RLC provides two-way data transmission service, and its most important feature is to retransmit.Autonomous retransmission please
Ask for supporting error free transmission.AM RLC is used primarily in mistake sensitivity, the non real-time application of time delay tolerance
In.These applications include most of type of interaction business, such as web browsing and file download etc..
TM RLC entity is transparent to the protocol Data Unit (Protocol Data Unit, PDU) through it
, do not execute any operation without PDU information, RLC SDU maps directly to RLC PDU yet.
Therefore TM RLC, using very strict, does not only need the RRC information of RLC configuration just can use,
Such as broadcast system information message, beep-page message, there is no RRC information during Signaling Radio Bearer etc..
UM RLC be mainly used in delay sensitive and tolerance mistake real time business, especially VoIP business with
And other streaming media service to delay sensitive.Point multipoint message traffic such as multimedia broadcast multi-broadcasting business also uses
UM RLC, because the feedback approach that point multipoint message traffic is not suitable for, these business can not use AM RLC.
In existing LTE system and system in future, low time delay and highly reliable be two important performance indications,
But the two is opposed.The guarantee of reliability inevitably results in higher time delay, and the demand of low time delay
Tend not to ensure the reliable reception of data.For AM pattern, the reliability of data transfer can be led to
Cross HARQ ARQ and retransmit realization, but RLC retransmission processes can bring larger time delay；And for
Although can ensure that compared with low time delay for TM/UM pattern, but due to there is no the reasons such as feedback path it is impossible to
Ensure the reliable reception of data.
Content of the invention
It is an object of the invention to provide a kind of data transmission method, wireless spread-spectrum technology send and receiving entity,
The reliability receiving in order to solve RLC data can not ensure when being transmitted simultaneously and asking compared with low time delay
Topic.
To achieve these goals, the invention provides a kind of data transmission method, it is applied to wireless link control
RLC sending entity processed, including：
Obtain the pending service data unit SDU information needing to strengthen reliability or reduce time delay, described treat
Process SDU information and include at least one SDU initial data；
Replication processes are carried out to the SDU initial data in described pending SDU information, obtains described SDU
The copy of initial data；
The copy of described SDU initial data and described SDU initial data is processed, obtains agreement number
According to unit PDU information；
Described PDU information is sent to RLC receiving entity.
Wherein, the described copy to described SDU initial data and described SDU initial data is processed,
The step obtaining protocol Data Unit PDU information includes：
The copy of SDU initial data and described SDU initial data is carried out segmentation and cascade is processed, obtain
Multiple PDU to be sent；
According to the position relationship between described SDU initial data and this SDU initial data, described pending
Send increase RLC header messages in PDU, obtain described PDU information.
Wherein, described according to the position between described SDU initial data and the copy of this SDU initial data
Relation, increases RLC header messages in described PDU to be sent, obtains the step bag of described PDU information
Include：
If described SDU initial data is adjacent with the copy of this SDU initial data, original in described SDU
Add RLC header messages in residing for the copy of data first PDU to be sent, obtain described PDU
Information；
Wherein, described RLC header messages include：For identifying the copy of described SDU initial data
The first identification information and for identifying each SDU data slot length in the described first PDU to be sent
The second identification information.
Wherein, described according to the position between described SDU initial data and the copy of this SDU initial data
Relation, increases RLC header messages in described PDU to be sent, obtains the step bag of described PDU information
Include：
If described SDU initial data is non-conterminous with the copy of this SDU initial data, former in described SDU
Add the 2nd RLC header messages in residing for the copy of beginning data first PDU to be sent, obtain described PDU
Information；
Wherein, described 2nd RLC header messages include：For identifying the copy of described SDU initial data
The first identification information, for identifying each SDU data slot length in the described first PDU to be sent
The second identification information and for identifying the 3rd identification information of described SDU initial data present position, described
3rd identification information includes the primary importance information of the second PDU to be sent residing for described SDU initial data
And the second position information of described SDU initial data present position in the described second PDU to be sent.
Present invention also offers a kind of data transmission method, it is applied to wireless spread-spectrum technology RLC receiving entity,
Methods described includes：
Obtain the PDU information that RLC sending entity sends；
Described PDU information comprises simultaneously SDU initial data and this SDU initial data copy when,
Duplicate removal process is carried out to described PDU information, obtains the PDU information after duplicate removal；
Restructuring process is carried out to the PDU information after duplicate removal, and is sent to upper strata.
Wherein, described comprise SDU initial data and this SDU initial data in described PDU information simultaneously
Copy when, duplicate removal process is carried out to described PDU information, obtains the step bag of the PDU information after duplicate removal
Include：
Detect in described PDU information, whether there is SDU initial data and the pair of this SDU initial data simultaneously
This；
If exist simultaneously, abandon appointing in described SDU initial data and the copy of this SDU initial data
Meaning one, obtains the PDU information after duplicate removal.
Wherein, described PDU information includes multiple PDU and RLC header messages corresponding with each PDU,
And each described PDU includes at least one SDU data slot.
Wherein, whether there is SDU initial data in the described PDU information of described detection simultaneously and this SDU is former
The step of the copy of beginning data includes：
If the corresponding RLC header messages of described PDU include the copy for identifying SDU initial data
First identification information, then detect in a described PDU and upper PDU adjacent with this PDU whether comprise institute
State the copy corresponding SDU initial data of SDU initial data；
If the corresponding RLC header messages of described PDU include the copy for identifying SDU initial data
First identification information and for identifying residing for the copy corresponding SDU initial data of described SDU initial data
Whether the 3rd identification information of position, then detect described in comprising in the PDU that described 3rd identification information is identified
The copy corresponding SDU initial data of SDU initial data, wherein, described 3rd identification information includes described
The primary importance information of the residing for SDU initial data second PDU to be sent and described SDU initial data exist
The second position information of present position in described second PDU to be sent.
Wherein, described restructuring process is carried out to the PDU information after duplicate removal, and be sent to the step on upper strata and include：
Remove the RLC header messages in each described PDU, obtain PDU to be combined；
It is used in RLC header messages according to described PDU to be combined identifying each SDU data slot length
The second identification information, restructuring is carried out to the SDU data slot in described PDU to be combined and processes and send
To upper strata.
Wherein, said method also includes：
If comprising any in SDU initial data and the copy of this SDU initial data in described PDU information
One, then do not trigger RLC retransmission operation or hybrid automatic repeat-request HARQ retransmission operation.
Present invention also offers a kind of wireless spread-spectrum technology sending entity, including：
First acquisition module, for obtaining the pending service data list needing to strengthen reliability or reduce time delay
First SDU information, described pending SDU information includes at least one SDU initial data；
First processing module, for replicating to the SDU initial data in described pending SDU information
Process, obtain the copy of described SDU initial data；
Recombination module, at the copy to described SDU initial data and described SDU initial data
Reason, obtains protocol Data Unit PDU information；
Sending module, for being sent to RLC receiving entity by described PDU information.
Wherein, described recombination module includes：
Recomposition unit, for by the copy of SDU initial data and described SDU initial data carry out segmentation and
Cascade is processed, and obtains multiple PDU to be sent；
Adding device, for closing according to the position between described SDU initial data and this SDU initial data
System, increases RLC header messages in described PDU to be sent, obtains described PDU information.
Wherein, described adding device includes：
First interpolation subelement, if the copy phase for described SDU initial data and this SDU initial data
Neighbour, then add a RLC report in the first PDU to be sent residing in the copy of described SDU initial data
Head message, obtains described PDU information；
Wherein, described RLC header messages include：For identifying the copy of described SDU initial data
The first identification information and for identifying each SDU data slot length in the described first PDU to be sent
The second identification information.
Wherein, described adding device includes：
Second interpolation subelement, if for described SDU initial data and this SDU initial data copy not
Adjacent, then add the 2nd RLC in the first PDU to be sent residing in the copy of described SDU initial data
Header messages, obtain described PDU information；
Wherein, described 2nd RLC header messages include：For identifying the copy of described SDU initial data
The first identification information, for identifying each SDU data slot length in the described first PDU to be sent
The second identification information and for identifying the 3rd identification information of described SDU initial data present position, described
3rd identification information includes the primary importance information of the second PDU to be sent residing for described SDU initial data
And the second position information of described SDU initial data present position in the described second PDU to be sent.
Present invention also offers a kind of wireless spread-spectrum technology receiving entity, including：
Second acquisition module, for obtaining the PDU information of RLC sending entity transmission；
Second processing module, for comprising SDU initial data and this SDU in described PDU information simultaneously
During the copy of initial data, duplicate removal process is carried out to described PDU information, obtain the PDU information after duplicate removal；
3rd processing module, for carrying out restructuring process to the PDU information after duplicate removal, and is sent to upper strata.
Wherein, described Second processing module includes：
Detector unit, for detecting whether there is SDU initial data and this SDU in described PDU information simultaneously
The copy of initial data；
, if for there is SDU initial data in described PDU information and this SDU is original simultaneously in duplicate removal unit
The copy of data, then abandon any one in described SDU initial data and the copy of this SDU initial data
Individual, obtain the PDU information after duplicate removal.
Wherein, described PDU information includes multiple PDU and RLC header messages corresponding with each PDU,
And each described PDU includes at least one SDU data slot.
Wherein, described detector unit includes：
First detection sub-unit, if include for identifying for described PDU corresponding RLC header messages
First identification information of the copy of SDU initial data, then detect described PDU and adjacent with this PDU upper
The copy corresponding SDU initial data of described SDU initial data whether is comprised in one PDU；
Second detection sub-unit, if include for identifying for described PDU corresponding RLC header messages
First identification information of the copy of SDU initial data and the copy correspondence for identifying described SDU initial data
SDU initial data present position the 3rd identification information, then detect what described 3rd identification information was identified
The copy corresponding SDU initial data of described SDU initial data whether is comprised in PDU, wherein, described
3rd identification information includes the primary importance information of the second PDU to be sent residing for described SDU initial data
And the second position information of described SDU initial data present position in the described second PDU to be sent.
Wherein, described 3rd processing module includes：
Removal unit, for removing the RLC header messages in each described PDU, obtains PDU to be combined；
Processing unit, is used for identifying each SDU in the RLC header messages according to described PDU to be combined
Second identification information of data slot length, carries out weight to the SDU data slot in described PDU to be combined
Group processes and is sent to upper strata.
Wherein, above-mentioned wireless spread-spectrum technology receiving entity, also includes：
Fourth processing module, if for comprising SDU initial data in described PDU information and this SDU is original
Any one in the copy of data, then do not trigger RLC retransmission operation or hybrid automatic repeat-request HARQ
Retransmission operation.
The embodiment of the present invention has the advantages that：
The data transmission method of the embodiment of the present invention, obtains and needs to strengthen reliability or reduce the pending of time delay
Service data unit SDU information；SDU initial data in described pending SDU information is replicated
Process, obtain the copy of described SDU initial data；Original to described SDU initial data and described SDU
The copy of data is processed, and obtains protocol Data Unit PDU information and is sent to RLC receiving entity.
The present invention passes through the SDU initial data needing to strengthen reception reliability or reduction time delay is carried out at duplication
Reason, while ensureing RLC data reliable reception, reduces due to retransmitting the time delay brought.
Brief description
Fig. 1 is the first workflow diagram of the data transmission method of the embodiment of the present invention；
Fig. 2 is the second workflow diagram of the data transmission method of the embodiment of the present invention；
Fig. 3 is the first structure schematic diagram of SDU initial data and SDU position in the embodiment of the present invention；
Fig. 4 is the second structural representation of SDU initial data and SDU position in the embodiment of the present invention；
Fig. 5 is the 3rd workflow diagram of the data transmission method of the embodiment of the present invention；
Fig. 6 is the process schematic diagram to the PDU information receiving for the RLC receiving terminal in the embodiment of the present invention；
Fig. 7 is the 4th workflow diagram of the data transmission method of the embodiment of the present invention；
Fig. 8 is the 5th workflow diagram of the data transmission method of the embodiment of the present invention；
Fig. 9 is the operating diagram under TM pattern for the data transmission method of the embodiment of the present invention；
Figure 10 is the operating diagram under UM pattern for the data transmission method of the embodiment of the present invention；
Figure 11 is the operating diagram under AM pattern for the data transmission method of the embodiment of the present invention；
Figure 12 is the structural representation of RLC header in the data transmission method of the embodiment of the present invention；
Figure 13 is that the RLC transmitting terminal of the embodiment of the present invention interacts schematic diagram with the first of RLC receiving terminal；
Figure 14 is that the RLC transmitting terminal of the embodiment of the present invention interacts schematic diagram with the second of RLC receiving terminal.
Specific embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with tool
Body embodiment and accompanying drawing are described in detail.
The embodiment provides a kind of data transmission method, wireless spread-spectrum technology send and receiving entity,
Solve the problems, such as that RLC data can not ensure the reliability receiving and compared with low time delay when being transmitted simultaneously.
First embodiment：
As shown in figure 1, this data transmission method, including：
Step 11：Obtain the pending service data unit SDU information needing to strengthen reliability or reduce time delay,
Described pending SDU information includes at least one SDU initial data；
Step 12：Replication processes are carried out to the SDU initial data in described pending SDU information, obtains
The copy of described SDU initial data；
Step 13：The copy of described SDU initial data and described SDU initial data is processed, obtains
To protocol Data Unit PDU information；
Step 14：Described PDU information is sent to RLC receiving entity.
The data transmission method of the embodiment of the present invention, obtains and needs to strengthen reliability or reduce the pending of time delay
Service data unit SDU information；SDU initial data in described pending SDU information is replicated
Process, obtain the copy of described SDU initial data；Original to described SDU initial data and described SDU
The copy of data is processed, and obtains protocol Data Unit PDU information and is sent to RLC receiving entity.
The present invention passes through the SDU initial data needing to strengthen reception reliability or reduction time delay is carried out at duplication
Reason, while ensureing RLC data reliable reception, reduces due to retransmitting the time delay brought.
Second embodiment：
As shown in Fig. 2 this data transmission method, including：
Step 11：Obtain the pending service data unit SDU information needing to strengthen reliability or reduce time delay,
Described pending SDU information includes at least one SDU initial data；
Step 12：Replication processes are carried out to the SDU initial data in described pending SDU information, obtains
The copy of described SDU initial data；
Step 131：The copy of SDU initial data and described SDU initial data is carried out at segmentation and cascade
Reason, obtains multiple PDU to be sent；
Step 132：According to the position relationship between described SDU initial data and this SDU initial data,
Increase RLC header messages in described PDU to be sent, obtain described PDU information；
Step 14：Described PDU information is sent to RLC receiving entity.
In this embodiment, the position relationship between SDU initial data and this SDU initial data can be adjacent
Alternatively non-conterminous, as shown in figure 3, RLC SDU n is the SDU needing to strengthen the delay sensitive of reliability
Initial data, after being replicated, RLC SDU n+1 is the copy of RLC SDU n, and Fig. 3 show
RLC SDU n copy RLC SDU n+1 is close to the situation of initial data RLC SDU n；As shown in figure 4,
Copy can also be in non-conterminous position with original RLC SDU n, and RLC SDU n+2 is RLC herein
The copy of SDU n.
Further, described step 131 includes：
If described SDU initial data is adjacent with the copy of this SDU initial data, original in described SDU
Add RLC header messages in residing for the copy of data first PDU to be sent, obtain described PDU
Information；
Wherein, described RLC header messages include：For identifying the copy of described SDU initial data
The first identification information and for identifying each SDU data slot length in the described first PDU to be sent
The second identification information.
Further, described step 131 also includes：
If described SDU initial data is non-conterminous with the copy of this SDU initial data, former in described SDU
Add the 2nd RLC header messages in residing for the copy of beginning data first PDU to be sent, obtain described PDU
Information；
Wherein, described 2nd RLC header messages include：For identifying the copy of described SDU initial data
The first identification information, for identifying each SDU data slot length in the described first PDU to be sent
The second identification information and for identifying the 3rd identification information of described SDU initial data present position, described
3rd identification information includes the primary importance information of the second PDU to be sent residing for described SDU initial data
And the second position information of described SDU initial data present position in the described second PDU to be sent.
In the RLC header messages of embodiment in the present invention, also include：The fields such as I, E, SN, LI, wherein：
FI：2 bits, for indicating that first data segment of this PDU data part and last data segment be
SDU or SDU segmentation；
E：1 bit, the part for continued access after instruction is header structure or data；
SN：PDU serial number, 5 bits or 10 bits；
LI：11 bits, the Length Indication of each SDU or SDU segmentation.
In a particular embodiment of the present invention, if the copy of RLC SDU is non-conterminous with original RLC SDU,
Then need to add a field in the RLC PDU header that RLC SDU copy is located, for indicating RLC
The position of the original RLC SDU place RLC PDU corresponding to the copy of SDU.Additionally, in prior art
In, last segmentation does not need LI to indicate.And the embodiment of the present invention needs to indicate often in RLC header
The LI (section length) of one segmentation, that is, on the basis of existing technology, needs to add last segmentation
LI indicates.For RLC SDU copy, corresponding LI, needs to make special handling, to inform that RLC receives
This RLC SDU of entity is copy, and non-primary RLC SDU data.Alternatively, by copy RLC SDU
Corresponding LI is set to complete 1/0 or other particular values.
3rd embodiment：
As shown in figure 5, this data transmission method, including：
Step 21：Obtain the PDU information that RLC sending entity sends；
Step 22：Comprise SDU initial data and this SDU initial data in described PDU information simultaneously
During copy, duplicate removal process is carried out to described PDU information, obtain the PDU information after duplicate removal；
Step 23：Restructuring process is carried out to the PDU information after duplicate removal, and is sent to upper strata.
Further, this embodiment also includes：
If comprising any in SDU initial data and the copy of this SDU initial data in described PDU information
One, then do not trigger RLC retransmission operation or hybrid automatic repeat-request HARQ retransmission operation.
In this embodiment, as long as being properly received any one RLC SDU (original RLC SDU or RLC
SDU copy), just abandon the reception to another RLC SDU.If as shown in fig. 6, copy RLC SDU n+1
Receive successfully, then abandon receiving original RLC SDU n.
In this embodiment, RLC receiving entity carries out reordering, removes RLC to the RLC PDU receiving
Header, discarding repeat RLC SDU and the reorganization operation receiving, and reduce RLC re-transmission under AM pattern and send out
Raw probability and the probability of MAC layer HARQ re-transmission, and then reduce data processing time delay.Same with this
When, improve the probability of TM/UM RLC PDU reliable reception it is ensured that the reliability of data receiver.
Fourth embodiment：
As shown in fig. 7, this data transmission method, including：
Step 21：Obtain the PDU information that RLC sending entity sends；
Step 221：Detect whether there is SDU initial data in described PDU information and this SDU is former simultaneously
The copy of beginning data；
Step 222：If exist simultaneously, abandon the pair of described SDU initial data and this SDU initial data
Any one in this, obtains the PDU information after duplicate removal；
Step 23：Restructuring process is carried out to the PDU information after duplicate removal, and is sent to upper strata.
In this embodiment, described PDU information includes multiple PDU and RLC corresponding with each PDU
Header messages, and each described PDU includes at least one SDU data slot.
Further, described step 221 includes：
If the corresponding RLC header messages of described PDU include the copy for identifying SDU initial data
Whether the first identification information, then comprise described SDU in a detection upper PDU adjacent with described PDU former
The copy corresponding SDU initial data of beginning data；
If the corresponding RLC header messages of described PDU include the copy for identifying SDU initial data
First identification information and for identifying residing for the copy corresponding SDU initial data of described SDU initial data
Whether the 3rd identification information of position, then detect described in comprising in the PDU that described 3rd identification information is identified
The copy corresponding SDU initial data of SDU initial data, wherein, described 3rd identification information includes described
The primary importance information of the PDU residing for SDU initial data and described SDU initial data are treated described first
Send the second position information of present position in PDU.
5th embodiment：
As shown in figure 8, this data transmission method, including：
Step 21：Obtain the PDU information that RLC sending entity sends；
Step 22：Comprise SDU initial data and this SDU initial data in described PDU information simultaneously
During copy, duplicate removal process is carried out to described PDU information, obtain the PDU information after duplicate removal；
Step 231：Remove the RLC header messages in each described PDU, obtain PDU to be combined；
Step 232：It is used in RLC header messages according to described PDU to be combined identifying each SDU number
According to the second identification information of fragment length, the SDU data slot in described PDU to be combined is recombinated
Process and be sent to upper strata.
Because wireless spread-spectrum technology (RLC) entity to be configured by one of 3 kinds of data-transmission modes：Transparent mould
Formula (TM), Unacknowledged Mode (UM) and affirmation mode (AM).With reference to three kinds of data-transmission modes
To describe the data transmission method of the embodiment of the present invention in detail.
(1) for TM transmission mode
As shown in figure 9, RLC sending side includes：
Step 1a：Transmitting terminal UM-RLC entity is to the pending service needing enhancing reliability or reduce time delay
SDU initial data in data cell SDU information carries out replication processes, obtains the pair of SDU initial data
This, directly generate protocol Data Unit PDU information, and it is real that described PDU information is sent to RLC reception
Body；
RLC receiving side includes：
Step 2a：RLC receiving entity obtains the PDU information that RLC sending entity sends, in described PDU
Comprise in information simultaneously SDU initial data and this SDU initial data copy when, abandon and repeat to receive
Data, obtains the PDU information after duplicate removal, and is sent to upper strata.
(2) for UM transmission mode
As shown in Figure 10, RLC sending side includes：
Step 1b：Transmitting terminal UM-RLC entity is to the pending service needing enhancing reliability or reduce time delay
SDU initial data in data cell SDU information carries out replication processes, obtains the pair of SDU initial data
This；
Step 2b：Segmentation, cascade are carried out to the copy of described SDU initial data and this SDU initial data
Process, obtain multiple PDU to be sent；
Step 3b：Increase RLC header information in each PDU to be sent, obtain PDU information, concurrently
Give RLC receiving entity.
RLC receiving entity side, including：
Step 4b：RLC receiving entity receives the PDU information that RLC sending entity sends, and carries out HARQ
Reorder, abandon the process of repetition receiving data；
Step 5b：Remove RLC header messages, obtain PDU to be combined；
Step 6b：SDU data slot in described PDU to be combined is carried out on restructuring processes and be sent to
Layer.
(3) for AM transmission mode
As shown in figure 11, RLC sending side includes：
Step 1c：Transmitting terminal UM-RLC entity is to the pending service needing enhancing reliability or reduce time delay
SDU initial data in data cell SDU information carries out replication processes, obtains the pair of SDU initial data
This；
Step 2c：Segmentation, cascade are carried out to the copy of described SDU initial data and this SDU initial data
Process, obtain multiple PDU to be sent；
Step 3c：Increase RLC header information in each PDU to be sent, obtain PDU information, concurrently
Give RLC receiving entity.
RLC receiving entity side, including：
Step 4c：RLC receiving entity receives the PDU information that RLC sending entity sends, and carries out HARQ
Reorder, abandon the process of repetition receiving data, and the copy when SDU initial data and SDU initial data
When not all being properly received, instruction RLC retransmits；
Step 5c：Remove RLC header messages, obtain PDU to be combined；
Step 6c：SDU data slot in described PDU to be combined is carried out on restructuring processes and be sent to
Layer.
Further, above-mentioned steps 3b and 3c all specifically include two kinds of situations, are described as follows.
Situation one：The copy of RLC SDU is adjacent with SDU initial data
Figure 12 shows the RLC header structure of RLC PDU 2.RLC PDU 2 is by RLC SDU 1
Section, RLC SDU 2 and RLC SDU 3 fragment are constituted.LI1 indicates the length of RLC SDU 1 fragment, LI3
Indicate the length of RLC SDU 3 fragment.RLC SDU 2 is the copy of RLC SDU 1, therefore by RLC
The corresponding LI of SDU 2 is set to complete 1, to notify RLC receiving entity RLC SDU 2 for RLC SDU's 1
Copy, RLC SDU 2 is identical with the length of RLC SDU 1.
As shown in figure 13, during data transfer, RLC PDU 1 is probably due to wireless environment difference etc. is former
Because normally receiving, thus leading to RLC SDU 1 can not receive.But RLC PDU 2 normally receives,
And RLC PDU 2 comprises the copy of RLC SDU 1, i.e. RLC SDU 2, therefore without triggering following
The HARQ of RLC PDU 1 retransmits and RLC retransmission operation.Due to avoiding the generation of re-transmission, from very
Time delay is reduced in big degree.Thereby it is ensured that the low time delay high reliability of data transfer.
Situation two：The copy of RLC SDU is non-conterminous with SDU initial data
When the copy of RLC SDU is non-conterminous with original RLC SDU, adding RLC PDU header
When need additionally to add a field, for indicating original SDU location, that is, be in which RLC
Which data segment of PDU.As shown in figure 14, RLC SDU 3 is the copy of RLC SDU 1, RLC SDU
3 is a part of RLC PDU 3.When adding RLC PDU 3header, pair need to be indicated in header
Initial data (the i.e. RLC SDU 1) location of this RLC SDU 3, that is, RLC SDU 1 be in
Second data segment of RLC PDU 1.
During data transfer, RLC PDU 1 is probably due to the reason such as wireless environment difference cannot normally connect
Receive, thus leading to RLC SDU 1 can not receive.But RLC PDU 3 may normally receive, and RLC PDU
3 copies comprising RLC SDU 1, i.e. RLC SDU 3, therefore need not trigger the HARQ of RLC PDU 1
Retransmit and RLC retransmission operation.Due to avoiding the generation of re-transmission, from largely reducing time delay.
Thereby it is ensured that the low time delay high reliability of data transfer.
Sixth embodiment：
Embodiments of the invention additionally provide a kind of wireless spread-spectrum technology sending entity, including：
First acquisition module, for obtaining the pending service data list needing to strengthen reliability or reduce time delay
First SDU information, described pending SDU information includes at least one SDU initial data；
First processing module, for replicating to the SDU initial data in described pending SDU information
Process, obtain the copy of described SDU initial data；
Recombination module, at the copy to described SDU initial data and described SDU initial data
Reason, obtains protocol Data Unit PDU information；
Sending module, for being sent to RLC receiving entity by described PDU information.
Further, described recombination module includes：
Recomposition unit, for by the copy of SDU initial data and described SDU initial data carry out segmentation and
Cascade is processed, and obtains multiple PDU to be sent；
Adding device, for closing according to the position between described SDU initial data and this SDU initial data
System, increases RLC header messages in described PDU to be sent, obtains described PDU information.
Further, described adding device includes：
First interpolation subelement, if the copy phase for described SDU initial data and this SDU initial data
Neighbour, then add a RLC report in the first PDU to be sent residing in the copy of described SDU initial data
Head message, obtains described PDU information；
Wherein, described RLC header messages include：For identifying the copy of described SDU initial data
The first identification information and for identifying each SDU data slot length in the described first PDU to be sent
The second identification information.
Further, described adding device includes：
Second interpolation subelement, if for described SDU initial data and this SDU initial data copy not
Adjacent, then add the 2nd RLC in the first PDU to be sent residing in the copy of described SDU initial data
Header messages, obtain described PDU information；
Wherein, described 2nd RLC header messages include：For identifying the copy of described SDU initial data
The first identification information, for identifying each SDU data slot length in the described first PDU to be sent
The second identification information and for identifying the 3rd identification information of described SDU initial data present position, described
3rd identification information includes the primary importance information of the second PDU to be sent residing for described SDU initial data
And the second position information of described SDU initial data present position in the described second PDU to be sent.
7th embodiment：
Embodiments of the invention additionally provide a kind of wireless spread-spectrum technology receiving entity, including：
Second acquisition module, for obtaining the PDU information of RLC sending entity transmission；
Second processing module, for comprising SDU initial data and this SDU in described PDU information simultaneously
During the copy of initial data, duplicate removal process is carried out to described PDU information, obtain the PDU information after duplicate removal；
3rd processing module, for carrying out restructuring process to the PDU information after duplicate removal, and is sent to upper strata.
Further, described Second processing module includes：
Detector unit, for detecting whether there is SDU initial data and this SDU in described PDU information simultaneously
The copy of initial data；
, if for there is SDU initial data in described PDU information and this SDU is original simultaneously in duplicate removal unit
The copy of data, then abandon any one in described SDU initial data and the copy of this SDU initial data
Individual, obtain the PDU information after duplicate removal.
Further, described PDU information includes multiple PDU and RLC header corresponding with each PDU
Message, and each described PDU includes at least one SDU data slot.
Further, described detector unit includes：
First detection sub-unit, if include for identifying for described PDU corresponding RLC header messages
First identification information of the copy of SDU initial data, then detect described PDU and adjacent with this PDU upper
The copy corresponding SDU initial data of described SDU initial data whether is comprised in one PDU；
Second detection sub-unit, if include for identifying for described PDU corresponding RLC header messages
First identification information of the copy of SDU initial data and the copy correspondence for identifying described SDU initial data
SDU initial data present position the 3rd identification information, then detect what described 3rd identification information was identified
The copy corresponding SDU initial data of described SDU initial data whether is comprised in PDU, wherein, described
3rd identification information includes the primary importance information of the second PDU to be sent residing for described SDU initial data
And the second position information of described SDU initial data present position in the described second PDU to be sent.
Further, described 3rd processing module includes：
Removal unit, for removing the RLC header messages in each described PDU, obtains PDU to be combined；
Processing unit, is used for identifying each SDU in the RLC header messages according to described PDU to be combined
Second identification information of data slot length, carries out weight to the SDU data slot in described PDU to be combined
Group processes and is sent to upper strata.
Further, above-mentioned wireless spread-spectrum technology receiving entity, also includes：
Fourth processing module, if for comprising SDU initial data in described PDU information and this SDU is original
Any one in the copy of data, then do not trigger RLC retransmission operation or hybrid automatic repeat-request HARQ
Retransmission operation.
It should be noted that this wireless spread-spectrum technology sends and receiving entity is corresponding with said method embodiment
Transmission and receiving entity, in said method embodiment, all implementations are all applied to this transmission and receive real
In the embodiment of body, also can reach identical technique effect.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within bright spirit and principle, any modification, equivalent substitution and improvement made etc., should be included in this
Within bright protection domain.
Claims (20)
1. a kind of data transmission method, be applied to wireless spread-spectrum technology RLC sending entity it is characterised in that
Methods described includes：
Obtain the pending service data unit SDU information needing to strengthen reliability or reduce time delay, described treat
Process SDU information and include at least one SDU initial data；
Replication processes are carried out to the SDU initial data in described pending SDU information, obtains described SDU
The copy of initial data；
The copy of described SDU initial data and described SDU initial data is processed, obtains agreement number
According to unit PDU information；
Described PDU information is sent to RLC receiving entity.
2. data transmission method according to claim 1 it is characterised in that described to described SDU
The copy of initial data and described SDU initial data is processed, and obtains protocol Data Unit PDU information
Step include：
The copy of SDU initial data and described SDU initial data is carried out segmentation and cascade is processed, obtain
Multiple PDU to be sent；
According to the position relationship between described SDU initial data and this SDU initial data, described pending
Send increase RLC header messages in PDU, obtain described PDU information.
3. data transmission method according to claim 2 it is characterised in that described according to described SDU
Position relationship between the copy of initial data and this SDU initial data, increases in described PDU to be sent
Plus RLC header messages, the step obtaining described PDU information includes：
If described SDU initial data is adjacent with the copy of this SDU initial data, original in described SDU
Add RLC header messages in residing for the copy of data first PDU to be sent, obtain described PDU
Information；
Wherein, described RLC header messages include：For identifying the copy of described SDU initial data
The first identification information and for identifying each SDU data slot length in the described first PDU to be sent
The second identification information.
4. data transmission method according to claim 2 it is characterised in that described according to described SDU
Position relationship between the copy of initial data and this SDU initial data, increases in described PDU to be sent
Plus RLC header messages, the step obtaining described PDU information includes：
If described SDU initial data is non-conterminous with the copy of this SDU initial data, former in described SDU
Add the 2nd RLC header messages in residing for the copy of beginning data first PDU to be sent, obtain described PDU
Information；
Wherein, described 2nd RLC header messages include：For identifying the copy of described SDU initial data
The first identification information, for identifying each SDU data slot length in the described first PDU to be sent
The second identification information and for identifying the 3rd identification information of described SDU initial data present position, described
3rd identification information includes the primary importance information of the second PDU to be sent residing for described SDU initial data
And the second position information of described SDU initial data present position in the described second PDU to be sent.
5. a kind of data transmission method, be applied to wireless spread-spectrum technology RLC receiving entity it is characterised in that
Methods described includes：
Obtain the PDU information that RLC sending entity sends；
Described PDU information comprises simultaneously SDU initial data and this SDU initial data copy when,
Duplicate removal process is carried out to described PDU information, obtains the PDU information after duplicate removal；
Restructuring process is carried out to the PDU information after duplicate removal, and is sent to upper strata.
6. data transmission method according to claim 5 it is characterised in that described in described PDU
Comprise in information simultaneously SDU initial data and this SDU initial data copy when, to described PDU information
Carry out duplicate removal process, the step obtaining the PDU information after duplicate removal includes：
Detect in described PDU information, whether there is SDU initial data and the pair of this SDU initial data simultaneously
This；
If exist simultaneously, abandon appointing in described SDU initial data and the copy of this SDU initial data
Meaning one, obtains the PDU information after duplicate removal.
7. data transmission method according to claim 6 is it is characterised in that described PDU packet
Include multiple PDU and RLC header messages corresponding with each PDU, and each described PDU is included at least
One SDU data slot.
8. data transmission method according to claim 7 is it is characterised in that the described PDU of described detection
The step that whether simultaneously there is the copy of SDU initial data and this SDU initial data in information includes：
If the corresponding RLC header messages of described PDU include the copy for identifying SDU initial data
First identification information, then detect in a described PDU and upper PDU adjacent with this PDU whether comprise institute
State the copy corresponding SDU initial data of SDU initial data；
If the corresponding RLC header messages of described PDU include the copy for identifying SDU initial data
First identification information and for identifying residing for the copy corresponding SDU initial data of described SDU initial data
Whether the 3rd identification information of position, then detect described in comprising in the PDU that described 3rd identification information is identified
The copy corresponding SDU initial data of SDU initial data, wherein, described 3rd identification information includes described
The primary importance information of the residing for SDU initial data second PDU to be sent and described SDU initial data exist
The second position information of present position in described second PDU to be sent.
9. data transmission method according to claim 7 it is characterised in that described to the PDU after duplicate removal
Information carries out restructuring process, and is sent to the step on upper strata and includes：
Remove the RLC header messages in each described PDU, obtain PDU to be combined；
It is used in RLC header messages according to described PDU to be combined identifying each SDU data slot length
The second identification information, restructuring is carried out to the SDU data slot in described PDU to be combined and processes and send
To upper strata.
10. data transmission method according to claim 5 is it is characterised in that methods described also includes：
If comprising any in SDU initial data and the copy of this SDU initial data in described PDU information
One, then do not trigger RLC retransmission operation or hybrid automatic repeat-request HARQ retransmission operation.
A kind of 11. wireless spread-spectrum technology sending entities are it is characterised in that include：
First acquisition module, for obtaining the pending service data list needing to strengthen reliability or reduce time delay
First SDU information, described pending SDU information includes at least one SDU initial data；
First processing module, for replicating to the SDU initial data in described pending SDU information
Process, obtain the copy of described SDU initial data；
Recombination module, at the copy to described SDU initial data and described SDU initial data
Reason, obtains protocol Data Unit PDU information；
Sending module, for being sent to RLC receiving entity by described PDU information.
12. wireless spread-spectrum technology sending entities according to claim 11 are it is characterised in that described heavy
Group module includes：
Recomposition unit, for by the copy of SDU initial data and described SDU initial data carry out segmentation and
Cascade is processed, and obtains multiple PDU to be sent；
Adding device, for closing according to the position between described SDU initial data and this SDU initial data
System, increases RLC header messages in described PDU to be sent, obtains described PDU information.
13. wireless spread-spectrum technology sending entities according to claim 12 are it is characterised in that described add
Plus unit includes：
First interpolation subelement, if the copy phase for described SDU initial data and this SDU initial data
Neighbour, then add a RLC report in the first PDU to be sent residing in the copy of described SDU initial data
Head message, obtains described PDU information；
Wherein, described RLC header messages include：For identifying the copy of described SDU initial data
The first identification information and for identifying each SDU data slot length in the described first PDU to be sent
The second identification information.
14. wireless spread-spectrum technology sending entities according to claim 12 are it is characterised in that described add
Plus unit includes：
Second interpolation subelement, if for described SDU initial data and this SDU initial data copy not
Adjacent, then add the 2nd RLC in the first PDU to be sent residing in the copy of described SDU initial data
Header messages, obtain described PDU information；
Wherein, described 2nd RLC header messages include：For identifying the copy of described SDU initial data
The first identification information, for identifying each SDU data slot length in the described first PDU to be sent
The second identification information and for identifying the 3rd identification information of described SDU initial data present position, described
3rd identification information includes the primary importance information of the second PDU to be sent residing for described SDU initial data
And the second position information of described SDU initial data present position in the described second PDU to be sent.
A kind of 15. wireless spread-spectrum technology receiving entities are it is characterised in that include：
Second acquisition module, for obtaining the PDU information of RLC sending entity transmission；
Second processing module, for comprising SDU initial data and this SDU in described PDU information simultaneously
During the copy of initial data, duplicate removal process is carried out to described PDU information, obtain the PDU information after duplicate removal；
3rd processing module, for carrying out restructuring process to the PDU information after duplicate removal, and is sent to upper strata.
16. wireless spread-spectrum technology receiving entities according to claim 15 are it is characterised in that described
Two processing modules include：
Detector unit, for detecting whether there is SDU initial data and this SDU in described PDU information simultaneously
The copy of initial data；
, if for there is SDU initial data in described PDU information and this SDU is original simultaneously in duplicate removal unit
The copy of data, then abandon any one in described SDU initial data and the copy of this SDU initial data
Individual, obtain the PDU information after duplicate removal.
17. wireless spread-spectrum technology receiving entities according to claim 16 are it is characterised in that described PDU
Information includes multiple PDU and RLC header messages corresponding with each PDU, and each described PDU bag
Include at least one SDU data slot.
18. wireless spread-spectrum technology receiving entities according to claim 17 are it is characterised in that described inspection
Survey unit to include：
First detection sub-unit, if include for identifying for described PDU corresponding RLC header messages
First identification information of the copy of SDU initial data, then detect described PDU and adjacent with this PDU upper
The copy corresponding SDU initial data of described SDU initial data whether is comprised in one PDU；
Second detection sub-unit, if include for identifying for described PDU corresponding RLC header messages
First identification information of the copy of SDU initial data and the copy correspondence for identifying described SDU initial data
SDU initial data present position the 3rd identification information, then detect what described 3rd identification information was identified
The copy corresponding SDU initial data of described SDU initial data whether is comprised in PDU, wherein, described
3rd identification information includes the primary importance information of the second PDU to be sent residing for described SDU initial data
And the second position information of described SDU initial data present position in the described second PDU to be sent.
19. wireless spread-spectrum technology receiving entities according to claim 17 are it is characterised in that described
Three processing modules include：
Removal unit, for removing the RLC header messages in each described PDU, obtains PDU to be combined；
Processing unit, is used for identifying each SDU in the RLC header messages according to described PDU to be combined
Second identification information of data slot length, carries out weight to the SDU data slot in described PDU to be combined
Group processes and is sent to upper strata.
20. wireless spread-spectrum technology receiving entities according to claim 15 are it is characterised in that also include：
Fourth processing module, if for comprising SDU initial data in described PDU information and this SDU is original
Any one in the copy of data, then do not trigger RLC retransmission operation or hybrid automatic repeat-request HARQ
Retransmission operation.
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