CN107770231B - Distributed data transport method and device, UM RLC entity based on UM rlc protocol - Google Patents
Distributed data transport method and device, UM RLC entity based on UM rlc protocol Download PDFInfo
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- CN107770231B CN107770231B CN201610704706.5A CN201610704706A CN107770231B CN 107770231 B CN107770231 B CN 107770231B CN 201610704706 A CN201610704706 A CN 201610704706A CN 107770231 B CN107770231 B CN 107770231B
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- rlc
- sdu
- rlc sdu
- cluster
- radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/02—Data link layer protocols
Abstract
The embodiment of the invention discloses a kind of distributed data transport method and device based on Unacknowledged Mode wireless spread-spectrum technology UM rlc protocol, UM RLC entity, it is arranged that Central Transmission caches and central service data cell SDU reorders unit in UM RLC entity；The described method includes: the UM RLC SDU is sent in the form of UM RLC SDU cluster to corresponding branch Radio Link after Central Transmission caching receives UM RLC service data unit SDU.The technical solution of the embodiment of the present invention can be compatible with existing UM rlc protocol stack function, can be compatible with discontinuous transmission bring time delay, have good scalability, can quickly support mass users.
Description
Technical field
The present invention relates to wireless data Distributed Transmission technology more particularly to a kind of distributed datas based on UM rlc protocol
Transmission method and device, UM RLC entity.
Background technique
Radio link layer controls the Unacknowledged Mode wireless spread-spectrum technology in (RLC, Radio Link Control) agreement
(UM RLC, Unacknowledged Mode Radio Link Control) protocol entity as a complete entity, into
The processing of row data pack receiving and transmitting.The 5G network architecture proposes the distributed structure/architecture of access network, and air protocol stack is separately operable not
In same distributed entities, and non-ideal transmission is transmitted as between distributed entities.With RCC-RRS (RCC:Radio Cloud
Center, RRS:Remote Radio System) for distributed structure/architecture, it is transmitted as non-ideal transmission between RCC-RRS,
So needing to consider to reconstruct the segmentation of protocol stack function under non-ideal transmission.
It and is currently in Packet Data Convergence Protocol (PDCP, Packet Data Convergence Protocol)/RLC
Between divide reconstruct, in PDCP function increase Packet Data Convergence Protocol protocol element (PDCP PDU, Packet Data
Convergence Protocol Protocol Data Unit) reordering function, the function of RLC remains unchanged.This side
Case has the following problems: 1, need to increase in PDCP agreement to the ranking function of data packet, this mode obscured RLC and
The function division of PDCP destroys the protocol stack function division principle that only RLC is responsible for data packet sequencing；2, it needs to assist in PDCP
Increase a whole set of in view and completely sequentially send and receive the mechanism of reordering, PDCP protocol stack is changed very big；3, it assists at present
PDCP does not need to handle the data of Unacknowledged Mode (UM, Transparent Mode) in view, if PDCP is supported
After the ranking function of data packet, for the completeness of protocol function, need to increase the processing to UM mode.4, PDCP passes through PDCP
When the sequence number (SN, Serial Number) of PDU is ranked up, to receive the PDCP PDU that multiple RLC are sent and be likely to arrange
Sequence causes complexity big, and when sequence extends.5, when re-establishing (reestablishment), because of data between RLC and PDCP
It is too long by the time of non-ideal transmission with control information, cause to re-establish process increasing new time delay.
Summary of the invention
In order to solve the above technical problems, an embodiment of the present invention is intended to provide a kind of distributed datas based on UM rlc protocol
Transmission method and device, UM RLC entity, do not make any change to PDCP function, increase the service data unit of UM RLC
The ranking function of (SDU, Service Data Unit) cluster (cluster) still continues to use current UM in SUD cluster
RLC ranking function ensure that the completely compatible property to current UM rlc protocol function.
The technical scheme of the present invention is realized as follows:
A kind of distributed number based on Unacknowledged Mode wireless spread-spectrum technology UM rlc protocol provided in an embodiment of the present invention
According to transmission method, Central Transmission cache unit is set in UM RLC entity and central service data cell SDU reorders unit；
The described method includes:
After the Central Transmission cache unit receives UM RLC service data unit SDU, by the UM RLC SDU with UM
The form of RLC SDU cluster is sent to corresponding branch Radio Link；
The center SDU reorder unit receive branch Radio Link transmission UM RLC SDU cluster after, to every
UM RLC SDU cluster on a branch Radio Link is ranked up, in order by the UM RLC SDU cluster after sequence
In UM RLC SDU to high level send.
In the embodiment of the present invention, all UM RLC SDU in the UM RLC SDU cluster are complete UM
RLC SDU。
In the embodiment of the present invention, the data volume for the UM RLC SDU for including in the UM RLC SDU cluster is able to satisfy
The time that branch Radio Link is persistently sent is not less than preset duration.
In the embodiment of the present invention, the Central Transmission cache unit is by the UM RLC SDU with the shape of UM RLC SDU cluster
Formula is sent in the way of fifo fifo to corresponding branch Radio Link.
In the embodiment of the present invention, the method also includes:
The center SDU reorders unit for the UM RLC SDU in the UM RLC SDU cluster in branch Radio Link
It sends in fifo fashion.
A kind of distributed data transport device based on UM rlc protocol provided in an embodiment of the present invention, described device packet
It includes:
Central Transmission cache unit, for receiving UM RLC service data unit SDU, and by the UM RLC SDU with UM
The form of RLC SDU cluster is sent to corresponding branch Radio Link；
Central SDU reorders unit, after the UM RLC SDU cluster for receiving the transmission of branch Radio Link, to every
UM RLC SDU cluster on a branch Radio Link is ranked up, in order by the UM RLC SDU cluster after sequence
In UM RLC SDU to high level send.
In the embodiment of the present invention, all UM RLC SDU in the UM RLC SDU cluster are complete UM
RLC SDU。
In the embodiment of the present invention, the data volume for the UM RLC SDU for including in the UM RLC SDU cluster is able to satisfy
The time that branch Radio Link is persistently sent is not less than preset duration.
In the embodiment of the present invention, the Central Transmission cache unit is also used to the UM RLC SDU with UM RLC
The form of SDU cluster is sent in the way of fifo fifo to corresponding branch Radio Link.
In the embodiment of the present invention, the center SDU reorders unit, is also used to the UM RLC SDU in branch Radio Link
UM RLC SDU in cluster is sent in fifo fashion.
The embodiment of the invention also provides a kind of UM RLC entities, including the distributed number above-mentioned based on UM rlc protocol
According to transmitting device.
The technical solution of the embodiment of the present invention, by the way that Central Transmission cache unit and center are arranged in UM RLC entity
SDU reorders unit；After the Central Transmission cache unit receives UM RLC service data unit SDU, by the UM RLC
SDU is sent in the form of UM RLC SDU cluster (cluster) to corresponding branch Radio Link.Wherein, UM RLC SDU
The data volume for the UM RLC SDU for including in cluster be able to satisfy time that branch Radio Link is persistently sent not less than it is default when
It is long.The technical solution of the embodiment of the present invention can be compatible with existing UM rlc protocol stack function, can be compatible with discontinuous transmission and bring
Time delay, have good scalability, can quickly support mass users.
Detailed description of the invention
Fig. 1 is the schematic diagram of the UM RLC solid data transport protocol stack framework of the embodiment of the present invention；
Fig. 2 is the flow diagram of the distributed data transport method based on UM rlc protocol of the embodiment of the present invention；
Fig. 3 is the composed structure schematic diagram of distributed data transport device of the embodiment of the present invention based on UM rlc protocol.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.
For the problem that the distributed structure/architecture of 5G access network, and current PDCP/RLC segmentation reconstruct exist.This hair
Bright embodiment provides one of mobile radio network distribution UM rlc protocol data transmission method, and this method is not to PDCP
Function makes any change, and increases the ranking function of the SDU cluster of UM RLC, still continues to use in SUD cluster at present
UM RLC ranking function, ensure that the completely compatible property to current UM rlc protocol function.
Fig. 1 is the schematic diagram of the UM RLC solid data transport protocol stack framework of the embodiment of the present invention, as shown in Figure 1, UM
RLC Entity increases Centralized Transmission buffer and Centralized SDU reassembly function
Can, there is no variations for existing other function processing.Each UM RLC Enity can possess multiple links simultaneously
(Branches of RL)。
The Centralized Transmission buffer function of the embodiment of the present invention includes: Centralized
Transmission buffer function are as follows: after receiving the UM RLC SDU that PDCP is sent, the UE provided according to MAC is each
Several complete UM RLC SDU are sent to correspondence with the line of UM RLC SDU cluster by the handling capacity eated dishes without rice or wine on CC
In Transmission buffer on branch Radio Link.Centralized Transmission buffer is not to any one
A UM RLC SDU carries out any segment processing, and all UM RLC SDU in UM RLC SDU cluster are complete UM
RLC SDU.The UM RLC SDU that each UM RLC SDU cluster includes can satisfy in the branch Radio Link long period
The transmission demand of (5ms/10ms, or even longer time etc.), to reduce the delay requirement transmitted between RCC-RRS.
That is the data volume for the UM RLC SDU for including in UM RLC SDU cluster is able to satisfy branch Radio Link and persistently sends
Time is not less than preset duration.The preset duration is 5ms, 10ms, 20ms or 50ms above-mentioned etc..
In the embodiment of the present invention, Centralized SDU reassembly function: complete to send out on each Radio Link
After the UM RLC SDU cluster sent up, the UM RLC SDU cluster on each Radio Link is ranked up,
Then it is sent in order to PDCP.
In the embodiment of the present invention, the UM RLC concrete function on each Radio Link still continues to use current UM rlc protocol
The function of entity, the difference lies in that receiving the UM RLC on total link when sending for the UM RLC on branch Radio Link and sending
The UM RLC SDU cluster come, different UM RLC SDU cluster is according to first in first out (FIFO, First Input
First Output) mode send, the UM RLC SDU in each UM RLC SDU cluster is also in the way of FIFO
It sends.When reception, the UM RLC SDU that branch Radio Link is sent is sent to high level.
Fig. 2 is the flow diagram of the distributed data transport method based on UM rlc protocol of the embodiment of the present invention, such as
Shown in Fig. 2, the distributed data transport method based on UM rlc protocol of the embodiment of the present invention the following steps are included:
Step 201: after Central Transmission cache unit receives UM RLC service data unit SDU, by the UM RLC SDU
It is sent in the form of UM RLC SDU cluster to corresponding branch Radio Link.
In the embodiment of the present invention, Central Transmission cache unit is set in UM RLC entity.
All UM RLC SDU in the UM RLC SDU cluster are complete UM RLC SDU.State UM RLC
The data volume for the UM RLC SDU for including in SDU cluster is able to satisfy time that branch Radio Link is persistently sent not less than default
Duration.
Specifically, Central Transmission cache unit presses the UM RLC SDU first in the form of UM RLC SDU cluster
It is sent into the mode for first going out FIFO to corresponding branch Radio Link.
Branch Radio Link sends the UM RLC SDU in UM RLC SDU cluster in fifo fashion.
Step 202: central SDU reorder unit receive branch Radio Link transmission UM RLC SDU cluster after,
UM RLC SDU cluster on each Radio Link is ranked up, in order by the UM RLC SDU after sequence
UM RLC SDU in cluster is sent to high level.
In the embodiment of the present invention, it is additionally provided with central SDU in UM RLC entity and reorders (Centralized SDU
Reassembly) unit.
In the embodiment of the present invention, high level refers to PDCP protocol layer.
Fig. 3 is the composed structure schematic diagram of distributed data transport device of the embodiment of the present invention based on UM rlc protocol,
As shown in figure 3, distributed data transport device of the embodiment of the present invention based on UM rlc protocol includes:
Central Transmission cache unit 30, for receiving UM RLC service data unit SDU, and by the UM RLC SDU with
The form of UM RLC SDU cluster is sent to corresponding branch Radio Link；
Central SDU reorders unit 31, right after the UM RLC SDU cluster for receiving the transmission of branch Radio Link
UM RLC SDU cluster on each Radio Link is ranked up, in order by the UM RLC SDU after sequence
UM RLC SDU in cluster is sent to high level.
In the embodiment of the present invention, all UM RLC SDU in the UM RLC SDU cluster are complete UM
RLC SDU。
In the embodiment of the present invention, the data volume for the UM RLC SDU for including in the UM RLC SDU cluster is able to satisfy
The time that branch Radio Link is persistently sent is not less than preset duration.
In the embodiment of the present invention, the Central Transmission cache unit 30 is also used to the UM RLC SDU with UM RLC
The form of SDU cluster is sent in the way of fifo fifo to corresponding branch Radio Link.
In the embodiment of the present invention, high level refers to PDCP protocol layer.
The embodiment of the present invention also describes a kind of UM RLC entity, including aforementioned shown in Fig. 3 based on UM rlc protocol
Distributed data transport device.
It, in the absence of conflict, can be in any combination between technical solution documented by the embodiment of the present invention.
In several embodiments provided by the present invention, it should be understood that disclosed method and smart machine, Ke Yitong
Other modes are crossed to realize.Apparatus embodiments described above are merely indicative, for example, the division of the unit, only
Only a kind of logical function partition, there may be another division manner in actual implementation, such as: multiple units or components can be tied
It closes, or is desirably integrated into another system, or some features can be ignored or not executed.In addition, shown or discussed each group
Can be through some interfaces at the mutual coupling in part or direct-coupling or communication connection, equipment or unit it is indirect
Coupling or communication connection, can be electrical, mechanical or other forms.
Above-mentioned unit as illustrated by the separation member, which can be or may not be, to be physically separated, aobvious as unit
The component shown can be or may not be physical unit, it can and it is in one place, it may be distributed over multiple network lists
In member；Some or all of units can be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, each functional unit in various embodiments of the present invention can be fully integrated into a second processing unit,
It is also possible to each unit individually as a unit, can also be integrated in one unit with two or more units；
Above-mentioned integrated unit both can take the form of hardware realization, can also add the form of SFU software functional unit real using hardware
It is existing.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.
Claims (11)
1. a kind of distributed data transport method based on Unacknowledged Mode wireless spread-spectrum technology UM rlc protocol, feature exist
In Central Transmission cache unit and central service data cell SDU are arranged in UM RLC entity and reorders unit；The method
Include:
After the Central Transmission cache unit receives UM RLC service data unit SDU, by the UM RLC SDU with UM RLC
The form of SDU cluster is sent to corresponding branch Radio Link；
The center SDU reorder unit receive branch Radio Link transmission UM RLC SDU cluster after, to each radio chains
The UM RLC SDU cluster of road is ranked up, in order by the UM RLC SDU in the UM RLC SDU cluster after sequence to high level
It sends.
2. the method according to claim 1, wherein all UM RLC SDU in the UM RLC SDU cluster
It is complete UM RLC SDU.
3. the method according to claim 1, wherein the UM RLC SDU for including in the UM RLC SDU cluster
Data volume be able to satisfy time that branch Radio Link is persistently sent not less than preset duration.
4. the method according to claim 1, wherein the Central Transmission cache unit is by the UM RLC SDU
It is sent in a manner of pressing fifo fifo in the form of UM RLC SDU cluster to corresponding branch Radio Link.
5. the method according to claim 3 or 4, which is characterized in that the method also includes:
The center SDU reorder unit by the UM RLC SDU in the UM RLC SDU cluster in branch Radio Link with FIFO's
Mode is sent.
6. a kind of distributed data transport device based on UM rlc protocol, which is characterized in that described device includes:
Central Transmission cache unit, for receiving UM RLC service data unit SDU, and by the UM RLC SDU with UM RLC
The form of SDU cluster is sent to corresponding branch Radio Link；
Central SDU reorders unit, wireless to each after the UM RLC SDU cluster for receiving the transmission of branch Radio Link
The UM RLC SDU cluster of chain road is ranked up, in order by the UM RLC SDU in the UM RLC SDU cluster after sequence to height
Layer is sent.
7. device according to claim 6, which is characterized in that all UM RLC SDU in the UM RLC SDU cluster
It is complete UM RLC SDU.
8. device according to claim 6, which is characterized in that the UM RLC SDU for including in the UM RLC SDU cluster
Data volume be able to satisfy time that branch Radio Link is persistently sent not less than preset duration.
9. device according to claim 6, which is characterized in that the Central Transmission cache unit is also used to the UM
RLC SDU is sent in a manner of pressing fifo fifo in the form of UM RLC SDU cluster to corresponding branch Radio Link.
10. device according to claim 7, which is characterized in that the center SDU reorders unit, be also used to by branch without
The UM RLC SDU in UM RLC SDU cluster in wired link is sent in fifo fashion.
11. a kind of UM RLC entity, which is characterized in that including being assisted described in any one of claim 6 to 10 based on UM RLC
The distributed data transport device of view.
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| CN201610704706.5A CN107770231B (en) | 2016-08-22 | 2016-08-22 | Distributed data transport method and device, UM RLC entity based on UM rlc protocol |
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| CN107770231B true CN107770231B (en) | 2019-11-26 |
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| CN101682864A (en) * | 2007-06-18 | 2010-03-24 | 高通股份有限公司 | Method and apparatus for pdcp reordering at handoff |
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