CN103476065A - Transmission method for radio link control layer and device - Google Patents
Transmission method for radio link control layer and device Download PDFInfo
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- CN103476065A CN103476065A CN2012101843640A CN201210184364A CN103476065A CN 103476065 A CN103476065 A CN 103476065A CN 2012101843640 A CN2012101843640 A CN 2012101843640A CN 201210184364 A CN201210184364 A CN 201210184364A CN 103476065 A CN103476065 A CN 103476065A
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Abstract
The invention provides a transmission method for a radio link control (RLC) layer. the method comprises the following steps: a, the RLC layer establishes a transmission buffer pool with a certain priority for data to be transmitted at a packet data convergence protocol (PDCP) layer according to a notice from the PDCP layer; b, the PDCP layer sends the data and the priority of the transmission buffer pool for storing the data to the RLC layer, and the RLC layer stores the data in the transmission buffer pool with the priority; and c, when the RLC layer can issue a RLC protocol data unit to a lower layer, RLC service data units in the transmission buffer pool are successively read according to the priority of the transmission buffer pool in the high-to-lower order so as to construct the RLC protocol data unit, and the constructed RLC protocol data unit is sent to a media access control layer. By the adoption of the method, data transmission flexibility can be raised, and transmission requirements of different data can be satisfied.
Description
Technical field
The present invention relates to wireless communication technology, particularly relate to transmission method and device that a kind of wireless link is controlled (RLC) layer.
Background technology
In current TD-LTE, the function of rlc protocol is carried out by the RLC entity corresponding with rlc layer.There is respectively the RLC entity of an equity in base station (eNB) and subscriber equipment (UE).This RLC entity receives from upper strata or, to upper strata distribution RLC SDU, by lower floor, to reciprocity RLC entity, sends or receive RLC PDU from reciprocity RLC entity.
While carrying out transfer of data, at the rlc layer of sending direction, will receive from upper strata RLC service data unit (SDUs), then this RLC SDUs be carried out to segmentation and serial connection, generate rlc protocol data cell (PDU).A RLC PDU can carry at least one RLC SDU segmentation, also can carry a plurality of RLC SDU and one to two RLC SDU segmentation.The RLC SDU quantity of specifically carrying is determined jointly by the sent size of data of lower floor's indication and the size of RLC SDU itself.
According to existing rlc protocol, a RLC entity will dispose a transmission buffer pond (Transmit buffer), and this transmission buffer pond only has one for a RLC sending entity.During RLC SDU that rlc layer receives from upper strata, can leave in this transmission buffer pond according to the sequencing of its arrival.
Work as lower floor, be that medium access is controlled (MAC) layer, notified the chance of a transmission to rlc layer, and when rlc layer is prepared the transmission new data, rlc layer can carry out the segmentation serial connection to RLC SDU wherein according to the sequencing that deposits described Transmit buffer in to be processed, and add the RLC head to form RLC PDU, then this RLC PDU is indicated to lower floor, thereby complete the transmitting procedure of RLC entity new data.
Adopt the data transmission scheme of above-mentioned traditional rlc layer, the data that all needs are transmitted all will be stored in same Transmit buffer, like this, rlc layer can't carry out corresponding processed according to the significance level of data, therefore, in carrying out the process of by RLC SDU, constructing RLC PDU, can only insert successively in RLC PDU according to the sequencing that enters Transmit buffer.
As can be seen here, the data transmission scheme of above-mentioned traditional rlc layer can't be adjusted the transmission sequence of data neatly according to the importance of data, therefore, lacks the flexibility of transmission, can't meet the prioritised transmission needs of significant data.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of transmission method and device of rlc layer, and the flexibility that can improve transfer of data meets the transmission requirement of different pieces of information.
In order to achieve the above object, the technical scheme that the present invention proposes is:
A kind of transmission method of wireless chain control layer, the method comprises the following steps:
A, wireless link are controlled the notice of (RLC) layer according to PDCP (PDCP) layer, are the data that described PDCP layer will transmit, and set up the transmit buffering pond of assigned priority;
B, described PDCP layer send to described rlc layer by described data and the priority of preserving the transmit buffering pond of described data, and described rlc layer is kept at described data in the transmit buffering pond of described priority;
C, when described rlc layer can send the rlc protocol data cell to lower floor, priority order from high to low according to the transmit buffering pond, read the RLC service data unit successively from described transmit buffering pond and construct the rlc protocol data cell, and constructed rlc protocol data cell is sent to medium access control layer.
A kind of transmitting device of wireless chain control layer, is characterized in that, this device comprises
Buffer Pool is set up unit, for according to the PDCP layer, to wireless link, controlling the notice that rlc layer sends, is the data that described PDCP layer will transmit, and sets up the transmit buffering pond of assigned priority;
Data storage cell, after the priority receiving described PDCP the layer described data that send and the transmit buffering pond of preserving described data, be saved to described data in the transmit buffering pond of described priority;
Data transmission unit, for when medium access control layer, to described rlc layer, having sent a notice of transmission data downwards, and when described rlc layer is carried out the preparation of transmission new data, notice according to described downward transmission data, priority order from high to low according to the transmit buffering pond, read the RLC service data unit successively from described transmit buffering pond and construct the rlc protocol data cell, and constructed rlc protocol data cell is sent to described medium access control layer.
In sum, the data transmission method of the RLC entity that the present invention proposes, the data that different priorities is required are kept in the transmit buffering pond of different priorities, and according to the transmit buffering pond order from high to low reading out data construct RLC PDU therefrom successively.So, the order that can guarantee to construct RLC PDU and send RLC PDU can need to be determined by the transmission on upper strata, and is no longer dependent on the order that enters the transmit buffering pond, thereby can improve the flexibility of transfer of data, meets the transmission requirement of different pieces of information.
The accompanying drawing explanation
The method flow schematic diagram that Fig. 1 is the embodiment of the present invention one;
The device schematic flow sheet that Fig. 2 is the embodiment of the present invention one.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Core concept of the present invention is: the Transmit buffer to rlc layer is according to priority divided, the RLC SDU of different priorities deposits in the Transmit buffer of different priorities, correspondingly, also according to the priority order from high to low of Transmit buffer, get RLC SDU when structure RLC PDU, so, the RLC PDU high priority data that can guarantee high priority is transmitted.
The method flow schematic diagram that Fig. 1 is the embodiment of the present invention one, as shown in Figure 1, the method for this embodiment comprises the following steps:
Here, the PDCP layer is before the transmission data, need to first determine the priority of preserving the transmit buffering pond of the data that pass in rlc layer, and then determined priority is notified to rlc layer, like this, rlc layer can be set up the transmit buffering pond of respective priority in advance according to this notice, in order in subsequent process, data are saved in the Buffer Pool of respective priority.In this step, the transmit buffering pond of described assigned priority, be the priority of appointment in the notice of PDCP layer.
Preferably, before this step, described PDCP layer can be according to default Buffer Pool priority policy, determines the priority of preserving the needed transmit buffering of the described data that will transmit pond, and to notify described rlc layer be the transmit buffering pond that described data are set up described priority.
Here, described Buffer Pool priority policy can be arranged according to actual needs by those skilled in the art, needs etc. such as time of the importance that can consider data, transmission, determines the priority in transmit buffering pond, but is not limited to above-mentioned factor.
Here, described PDCP layer, when sending data, also will be preserved the priority in the transmit buffering pond of described data simultaneously and notify to rlc layer, and like this, rlc layer just can deposit data in the transmit buffering pond of corresponding priority.
Here, priority order from high to low according to the transmit buffering pond, read the RLC service data unit successively from described transmit buffering pond and construct the rlc protocol data cell, the order that can guarantee to construct RLC PDU and send RLC PDU can need to be determined by the transmission on upper strata, and be no longer dependent on the order that enters the transmit buffering pond, thereby can improve the flexibility of transfer of data, meet the transmission requirement of different pieces of information.
Particularly, described rlc layer can send the rlc protocol data cell to lower floor and is:
When medium access control layer has sent a notice of transmission data downwards to described rlc layer, and described rlc layer is while carrying out the preparation of transmission new data.
The described priority according to transmit buffering pond order from high to low reads the RLC service data unit successively and constructs the rlc protocol data cell, that is: from described transmit buffering pond
Described rlc layer reads the principle of RLC service data unit after all being run through according to the RLC service data unit in the high priority transfer Buffer Pool again from adjacent low priority transmit buffering pond, reads the RLC service data unit successively from described transmit buffering pond and constructs the rlc protocol data cell.
Fig. 2 has provided the transmitting device of a kind of wireless chain control layer in vain corresponding with said method, and as shown in Figure 2, this device mainly comprises following parts:
Buffer Pool is set up unit, for according to the PDCP layer, to wireless link, controlling the notice that rlc layer sends, is the data that described PDCP layer will transmit, and sets up the transmit buffering pond of assigned priority.
Data storage cell, after the priority receiving described the PDCP described data that send and the transmit buffering pond of preserving described data, be saved to described data in the transmit buffering pond of described priority.
Data transmission unit, for when medium access control layer, to described rlc layer, having sent a notice of transmission data downwards, and when described rlc layer is carried out the preparation of transmission new data, notice according to described downward transmission data, priority order from high to low according to the transmit buffering pond, read the RLC service data unit successively from described transmit buffering pond and construct the rlc protocol data cell, and constructed rlc protocol data cell is sent to described medium access control layer.
Above-mentioned three unit are arranged in rlc layer.
Preferably, described device further comprises:
Priority determining unit, be used for described PDCP layer according to default Buffer Pool priority policy, determine to preserve the priority in the needed transmit buffering of the described data that will transmit pond, and to notify described rlc layer be the transmit buffering pond that described data are set up described priority.
Above-mentioned priority determining unit is located in the PDCP layer.
Preferably, described data transmission unit is further used for having sent a notice of transmission data downwards when medium access control layer to described rlc layer, and, when described rlc layer is carried out the preparation of transmission new data, according to the notice of described downward transmission data, carry out described structure.
Preferably, described data transmission unit reads the principle of RLC service data unit after being further used for all being run through according to the RLC service data unit in the high priority transfer Buffer Pool again from adjacent low priority transmit buffering pond, reads the RLC service data unit successively from described transmit buffering pond and constructs the rlc protocol data cell.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. the transmission method of a wireless chain control layer, is characterized in that, the method comprises the following steps:
A, wireless link are controlled the notice of rlc layer according to PDCP PDCP layer, are the data that described PDCP layer will transmit, and set up the transmit buffering pond of assigned priority;
B, described PDCP layer send to described rlc layer by described data and the priority of preserving the transmit buffering pond of described data, and described rlc layer is kept at described data in the transmit buffering pond of described priority;
C, when described rlc layer can send the rlc protocol data cell to lower floor, priority order from high to low according to the transmit buffering pond, read the RLC service data unit successively from described transmit buffering pond and construct the rlc protocol data cell, and constructed rlc protocol data cell is sent to medium access control layer.
2. method according to claim 1, is characterized in that, before described step a, further comprises:
Described PDCP layer is according to default Buffer Pool priority policy, determines the priority of preserving the needed transmit buffering of the described data that will transmit pond, and to notify described rlc layer be the transmit buffering pond that described data are set up described priority.
3. method according to claim 1, is characterized in that, rlc layer described in step c can send the rlc protocol data cell to lower floor and be:
When medium access control layer has sent a notice of transmission data downwards to described rlc layer, and described rlc layer is while carrying out the preparation of transmission new data.
4. method according to claim 1, it is characterized in that, rlc layer described in step c reads the principle of RLC service data unit after all being run through according to the RLC service data unit in the high priority transfer Buffer Pool again from adjacent low priority transmit buffering pond, reads the RLC service data unit successively from described transmit buffering pond and constructs the rlc protocol data cell.
5. the transmitting device of a wireless chain control layer, is characterized in that, this device comprises
Buffer Pool is set up unit, for according to PDCP PDCP layer, to wireless link, controlling the notice that rlc layer sends, is the data that described PDCP layer will transmit, and sets up the transmit buffering pond of assigned priority;
Data storage cell, after the priority receiving described PDCP the layer described data that send and the transmit buffering pond of preserving described data, be saved to described data in the transmit buffering pond of described priority;
Data transmission unit, for when medium access control layer, to described rlc layer, having sent a notice of transmission data downwards, and when described rlc layer is carried out the preparation of transmission new data, notice according to described downward transmission data, priority order from high to low according to the transmit buffering pond, read the RLC service data unit successively from described transmit buffering pond and construct the rlc protocol data cell, and constructed rlc protocol data cell is sent to described medium access control layer.
6. device according to claim 5, is characterized in that, described device further comprises:
Priority determining unit, be used for described PDCP layer according to default Buffer Pool priority policy, determine to preserve the priority in the needed transmit buffering of the described data that will transmit pond, and to notify described rlc layer be the transmit buffering pond that described data are set up described priority.
7. device according to claim 5, it is characterized in that, described data transmission unit is further used for having sent a notice of transmission data downwards when medium access control layer to described rlc layer, and when described rlc layer is carried out the preparation of transmission new data, according to the notice of described downward transmission data, carry out described structure.
8. device according to claim 5, it is characterized in that, described data transmission unit reads the principle of RLC service data unit after being further used for all being run through according to the RLC service data unit in the high priority transfer Buffer Pool again from adjacent low priority transmit buffering pond, reads the RLC service data unit successively from described transmit buffering pond and constructs the rlc protocol data cell.
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| CN2012101843640A CN103476065A (en) | 2012-06-06 | 2012-06-06 | Transmission method for radio link control layer and device |
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| CN2012101843640A CN103476065A (en) | 2012-06-06 | 2012-06-06 | Transmission method for radio link control layer and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104935414A (en) * | 2014-03-21 | 2015-09-23 | 上海贝尔股份有限公司 | Method for transmitting information in dual connection system and device |
| CN108391287A (en) * | 2017-02-03 | 2018-08-10 | 华为技术有限公司 | The method and apparatus for being used for transmission PDU, being used to indicate PDU priority |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101267443A (en) * | 2008-05-09 | 2008-09-17 | 北京天碁科技有限公司 | A data processing method and communication device |
| CN101610541A (en) * | 2008-06-19 | 2009-12-23 | 鼎桥通信技术有限公司 | The method of transmitting RLC information and device in the HSDPA system |
| CN102291779A (en) * | 2010-06-17 | 2011-12-21 | 鼎桥通信技术有限公司 | User plane data dispatching method |
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- 2012-06-06 CN CN2012101843640A patent/CN103476065A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101267443A (en) * | 2008-05-09 | 2008-09-17 | 北京天碁科技有限公司 | A data processing method and communication device |
| CN101610541A (en) * | 2008-06-19 | 2009-12-23 | 鼎桥通信技术有限公司 | The method of transmitting RLC information and device in the HSDPA system |
| CN102291779A (en) * | 2010-06-17 | 2011-12-21 | 鼎桥通信技术有限公司 | User plane data dispatching method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104935414A (en) * | 2014-03-21 | 2015-09-23 | 上海贝尔股份有限公司 | Method for transmitting information in dual connection system and device |
| CN104935414B (en) * | 2014-03-21 | 2019-05-24 | 上海诺基亚贝尔股份有限公司 | A kind of method and apparatus for transmitting information in doubly-linked welding system |
| CN108391287A (en) * | 2017-02-03 | 2018-08-10 | 华为技术有限公司 | The method and apparatus for being used for transmission PDU, being used to indicate PDU priority |
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Application publication date: 20131225 |