CN106101285A - Distributed data transport method and device based on TM rlc protocol, TM RLC entity - Google Patents
Distributed data transport method and device based on TM rlc protocol, TM RLC entity Download PDFInfo
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- CN106101285A CN106101285A CN201610703419.2A CN201610703419A CN106101285A CN 106101285 A CN106101285 A CN 106101285A CN 201610703419 A CN201610703419 A CN 201610703419A CN 106101285 A CN106101285 A CN 106101285A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
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Abstract
The embodiment of the invention discloses a kind of based on transparent mode radio link control the distributed data transport method and device of TM rlc protocol, TM RLC entity, TM RLC entity arranges Central Transmission caching；Described method includes: after Central Transmission caching receives TM RLC service data unit SDU, is sent to corresponding wireless link with the form of TM RLC SDU burst cluster by described TM RLC SDU.The technical scheme of the embodiment of the present invention compatible can have TM rlc protocol stack function, it is possible to the time delay that compatible discontinuous transmission brings, and has good autgmentability, it is possible to quickly support mass users.
Description
Technical field
The present invention relates to wireless data Distributed Transmission technology, particularly relate to a kind of distributed data based on TM rlc protocol
Transmission method and device, TM RLC entity.
Background technology
Radio link layer controls the transparent mode radio link in (RLC, Radio Link Control) agreement and controls (TM
RLC, Transparent Mode Radio Link Control) protocol entity as a complete entity, carry out packet
Transmitting-receiving processes.The 5G network architecture proposes the distributed structure/architecture of access network, and air protocol stack is separately operable in different distributions
Formula physically, and is transmitted as non-ideal transmission between distributed entities.With RCC-RRS (RCC:Radio Cloud Center,
RRS:Remote Radio System) as a example by distributed structure/architecture, between RCC-RRS, it is transmitted as non-ideal transmission, so needing
Consider the segmentation reconstruct to protocol stack function under non-ideal transmission.
And be currently at PDCP (PDCP, Packet Data Convergence Protocol)/RLC
Between segmentation reconstruct, in PDCP function increase PDCP protocol element (PDCP PDU, Packet Data
Convergence Protocol Protocol Data Unit) reordering function, the function of RLC keeps constant.This side
Case there is problems in that 1, needs to increase the ranking function to packet in PDCP agreement, this mode obscured RLC and
The function of PDCP divides, and destroys only RLC and is responsible for the protocol stack function division principle of data packet sequencing；2, need to assist at PDCP
View increases a whole set of complete sequentially transmission and reception is reordered mechanism, PDCP protocol stack is changed the biggest；3, assist at present
In view, PDCP need not process, the data of transparent mode (TM, Transparent Mode) if PDCP supports number
After ranking function according to bag, for the completeness of protocol function, need to increase the process to TM pattern.4, PDCP passes through PDCP
When the serial number (SN, Serial Number) of PDU is ranked up, the PDCP PDU that will receive multiple RLC transmission is only possible to row
Sequence, causes complexity big, extends during sequence.When 5, re-establishing (reestablishment), because data between RLC and PDCP
Oversize through the time of non-ideal transmission with the information of control, cause the process of re-establishing to add new time delay.
Summary of the invention
For solving above-mentioned technical problem, embodiment of the present invention expectation provides a kind of distributed data based on TM rlc protocol
Transmission method and device, TM RLC entity, on the premise of not making any change PDCP function, increase TM RLC entity
The distribution function of service data unit (SDU, Service Data Unit), on each link, mesh is still continued to use in the transmitting-receiving of SDU
The function of front TM RLC, and ensure that the completely compatible property to current TM rlc protocol function.
The technical scheme is that and be achieved in that:
Embodiments provide a kind of distributed data controlling TM rlc protocol based on transparent mode radio link
Transmission method, arranges Central Transmission caching in TM RLC entity；Described method includes:
After described Central Transmission caching receives TM RLC service data unit SDU, by described TM RLC SDU with TM RLC
The form of SDU burst sends to corresponding wireless link.
In the embodiment of the present invention, all TM RLC SDU in described TM RLC SDU cluster are complete TM
RLC SDU。
In the embodiment of the present invention, the data volume of the TM RLC SDU comprised in described TM RLC SDU cluster can meet
The time that wireless link persistently sends is not less than preset duration.
In the embodiment of the present invention, described Central Transmission caches the form happened suddenly by described TM RLC SDU with TM RLC SDU
Send to corresponding wireless link by the mode of fifo fifo.
In the embodiment of the present invention, described method also includes:
Prop up wireless link to be sent in fifo fashion by the TM RLC SDU in TM RLC SDU cluster.
In the embodiment of the present invention, described method also includes:
After receiving the TM RLC SDU cluster that a wireless link sends, by described TM RLC SDU cluster
TM RLC SDU to high level send.
The embodiment of the present invention additionally provides a kind of distributed data transport device based on TM rlc protocol, and its feature exists
In, described device includes:
Central Transmission buffer unit, is used for receiving TM RLC service data unit SDU, and by described TM RLC SDU with TM
The form of RLC SDU burst sends to corresponding wireless link.
In the embodiment of the present invention, all TM RLC SDU in described TM RLC SDU cluster are complete TM
RLC SDU。
In the embodiment of the present invention, the data volume of the TM RLC SDU comprised in described TM RLC SDU cluster can meet
The time that wireless link persistently sends is not less than preset duration.
In the embodiment of the present invention, described Central Transmission buffer unit, it is additionally operable to described TM RLC SDU with TM RLC
The form of SDU burst (cluster) is pressed the mode of fifo fifo and is sent to corresponding wireless link.
In the embodiment of the present invention, described Central Transmission buffer unit, it is additionally operable to receive the TM that a wireless link sends
RLC SDU cluster, and the TM RLC SDU in described TM RLC SDU cluster is sent to high level.
The embodiment of the present invention additionally provides a kind of TM RLC entity, including aforesaid distributed number based on TM rlc protocol
According to transmitting device.
The technical scheme of the embodiment of the present invention, caches by arranging Central Transmission in TM RLC entity；In described central authorities
After transmission buffer receives TM RLC service data unit SDU, by described TM RLC SDU with TM RLC SDU burst cluster's
Form sends to corresponding wireless link.Wherein, the data volume of the TM RLC SDU comprised in TM RLC SDU cluster
Satisfied the time that wireless link persistently sends can be not less than preset duration.The technical scheme of the embodiment of the present invention can compatibility
There is TM rlc protocol stack function, it is possible to the time delay that compatible discontinuous transmission brings, there is good autgmentability, it is possible to quickly support
Mass users.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the TM RLC solid data transport protocol stack framework of the embodiment of the present invention；
Fig. 2 is the schematic flow sheet of the distributed data transport method based on TM rlc protocol of the embodiment of the present invention；
Fig. 3 is the composition structural representation of embodiment of the present invention distributed data transport based on TM rlc protocol device.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe wholely.
For the distributed structure/architecture of 5G access network, and the problem that current PDCP/RLC segmentation reconstruct exists.This
Bright embodiment provides a kind of Distributed T M rlc protocol data transmission method in mobile radio network, and the method is not to PDCP
Function makes any change, and only increases the distribution function of the SDU of TM RLC, and on each link, mesh is still continued to use in the transmitting-receiving of SDU
The function of front TM RLC, it is ensured that the completely compatible property to current TM rlc protocol function.
Fig. 1 is the schematic diagram of the TM RLC solid data transport protocol stack framework of the embodiment of the present invention, as it is shown in figure 1, TM
RLC Entity adds Centralized Transmission buffer function, and other function treatment existing are not sent out
Changing.Each TM RLC Enity can have multiple links (Branches of RL) simultaneously.
The Centralized Transmission buffer function of the embodiment of the present invention includes: receives high-rise transmission and comes
TM RLC SDU after, each community (Cell) provided according to medium education (MAC, Media Access Control)
Cell level eat dishes without rice or wine performance, several complete TM RLC SDU are sent with the form of TM RLC SDU burst (cluster)
In Transmission buffer on a corresponding wireless link.In the embodiment of the present invention, Centralized
Transmission buffer does not carries out any process to any one TM RLC SDU, in TM RLC SDU cluster
All TM RLC SDU are complete TM RLC SDU.The TM RLC SDU that each TM RLC SDU cluster comprises is permissible
Meet in wireless link long period the transmission demand of (5ms/10ms, the most long-time etc.), thus reduce RCC-
The delay requirement of transmission between RRS.It is to say, the data volume energy of the TM RLC SDU comprised in TM RLC SDU cluster
Satisfied the time that wireless link persistently sends is not less than preset duration.This preset duration be aforesaid 5ms, 10ms, 20ms or
50ms etc..
TM RLC concrete function on each wireless link still continues to use the function of current TM rlc protocol entity, different
Point is, during transmission, receives the TM RLC on total link for the TM RLC on a wireless link and sends the TM RLC SDU of coming
Cluster, different TM RLC SDU cluster are according to first in first out (FIFO, First Input First Output)
Mode sends, and the TM RLC SDU in each TM RLC SDU cluster also sends according to the mode of FIFO.During reception, will prop up
The TM RLC SDU that wireless link sends sends to high level.
Fig. 2 is the schematic flow sheet of the distributed data transport method based on TM rlc protocol of the embodiment of the present invention, as
Shown in Fig. 2, the distributed data transport method based on TM rlc protocol of the embodiment of the present invention comprises the following steps:
Step 201: Central Transmission caching receives TM RLC SDU.
In the embodiment of the present invention, Central Transmission buffer setting is in TM RLC entity.
Step 202: Central Transmission caching by described TM RLC SDU with TM RLC SDU burst (cluster) form to
Corresponding wireless link sends.
All TM RLC SDU in described TM RLC SDU cluster are complete TM RLC SDU.Described TM
The data volume of the TM RLC SDU comprised in RLC SDU cluster can meet the time that wireless link persistently sends and be not less than
Preset duration.
Specifically, described TM RLC SDU is pressed first by Central Transmission caching with the form of TM RLC SDU burst cluster
The mode entering first to go out FIFO sends to corresponding wireless link.
Prop up wireless link to be sent in fifo fashion by the TM RLC SDU in TM RLC SDU cluster.
Step 203: after Central Transmission caching receives the TM RLC SDU cluster that a wireless link sends, by described
TM RLC SDU in TM RLC SDU cluster sends to high level.
In the embodiment of the present invention, high level refers to PDCP protocol layer.
Fig. 3 is the composition structural representation of embodiment of the present invention distributed data transport based on TM rlc protocol device,
As it is shown on figure 3, embodiment of the present invention distributed data transport based on TM rlc protocol device includes:
Central Transmission buffer unit 30, is used for receiving TM RLC service data unit SDU, and by described TM RLC SDU with
The form of TM RLC SDU burst cluster sends to corresponding wireless link.
In the embodiment of the present invention, all TM RLC SDU in described TM RLC SDU cluster are complete TM
RLC SDU。
In the embodiment of the present invention, the data volume of the TM RLC SDU comprised in described TM RLC SDU cluster can meet
The time that wireless link persistently sends is not less than preset duration.
In the embodiment of the present invention, described Central Transmission buffer unit 30, it is additionally operable to described TM RLC SDU with TM RLC
The form of SDU burst cluster is pressed the mode of fifo fifo and is sent to corresponding wireless link.
In the embodiment of the present invention, described Central Transmission buffer unit 30, it is additionally operable to receive the TM that a wireless link sends
RLC SDU cluster, and the TM RLC SDU in described TM RLC SDU cluster is sent to high level.
In the embodiment of the present invention, high level refers to PDCP protocol layer.
The embodiment of the present invention has also stated that a kind of TM RLC entity, based on TM rlc protocol including shown in earlier figures 3
Distributed data transport device.
Between technical scheme described in the embodiment of the present invention, in the case of not conflicting, can be in any combination.
In several embodiments provided by the present invention, it should be understood that disclosed method and smart machine, Ke Yitong
The mode crossing other realizes.Apparatus embodiments described above is only schematically, such as, and the division of described unit, only
Being only a kind of logic function to divide, actual can have other dividing mode, such as when realizing: multiple unit or assembly can be tied
Close, or be desirably integrated into another system, or some features can be ignored, or do not perform.It addition, shown or discussed each group
The coupling each other of one-tenth part or direct-coupling or communication connection can be indirect by some interfaces, equipment or unit
Coupling or communication connection, can be electrical, machinery or other form.
The above-mentioned unit illustrated as separating component can be or may not be physically separate, shows as unit
The parts shown can be or may not be physical location, i.e. may be located at a place, it is also possible to be distributed to multiple network list
In unit；Part or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.
It addition, each functional unit in various embodiments of the present invention can be fully integrated in second processing unit,
Can also be that each unit is individually as a unit, it is also possible to two or more unit are integrated in a unit；
Above-mentioned integrated unit both can realize to use the form of hardware, it would however also be possible to employ the form that hardware adds SFU software functional unit is real
Existing.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.
Claims (12)
1. the distributed data transport method controlling TM rlc protocol based on transparent mode radio link, it is characterised in that
Central Transmission caching is set in TM RLC entity；Described method includes:
After described Central Transmission caching receives TM RLC service data unit SDU, described TM RLCSDU is dashed forward with TM RLC SDU
The form sent out sends to corresponding wireless link.
Method the most according to claim 1, it is characterised in that all TM RLC in described TM RLC SDU cluster
SDU is complete TM RLC SDU.
Method the most according to claim 1, it is characterised in that the TM RLC comprised in described TM RLC SDU cluster
The data volume of SDU can meet the time that wireless link persistently sends and be not less than preset duration.
Method the most according to claim 1, it is characterised in that described Central Transmission caches described TM RLC SDU with TM
The form of RLC SDU burst is pressed the mode of fifo fifo and is sent to corresponding wireless link.
5. according to the method described in claim 3 or 4, it is characterised in that described method also includes:
Prop up wireless link to be sent in fifo fashion by the TM RLC SDU in TM RLC SDU cluster.
Method the most according to claim 1, it is characterised in that described method also includes:
After receiving the TM RLC SDU cluster that a wireless link sends, by the TM in described TM RLC SDU cluster
RLC SDU sends to high level.
7. a distributed data transport device based on TM rlc protocol, it is characterised in that described device includes:
Central Transmission buffer unit, is used for receiving TM RLC service data unit SDU, and by described TM RLC SDU with TM RLC
The form of SDU burst sends to corresponding wireless link.
Device the most according to claim 7, it is characterised in that all TM RLC in described TM RLC SDU cluster
SDU is complete TM RLC SDU.
Device the most according to claim 7, it is characterised in that the TM RLC comprised in described TM RLC SDU cluster
The data volume of SDU can meet the time that wireless link persistently sends and be not less than preset duration.
Device the most according to claim 7, it is characterised in that described Central Transmission buffer unit, is additionally operable to described TM
RLC SDU sends to corresponding wireless link in the way of the form that TM RLC SDU happens suddenly presses fifo fifo.
11. devices according to claim 7, it is characterised in that described Central Transmission buffer unit, are additionally operable to receive and prop up
The TM RLC SDU cluster that wireless link sends, and by the TM RLC SDU in described TM RLC SDU cluster to height
Layer sends.
12. 1 kinds of TM RLC entities, it is characterised in that include assisting based on TM RLC according to any one of claim 7 to 11
The distributed data transport device of view.
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Cited By (1)
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| CN112399471A (en) * | 2020-10-23 | 2021-02-23 | 紫光展锐(重庆)科技有限公司 | Data caching method and related device |
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