CN102104916A - Data scheduling method and system - Google Patents
Data scheduling method and system Download PDFInfo
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- CN102104916A CN102104916A CN200910258179XA CN200910258179A CN102104916A CN 102104916 A CN102104916 A CN 102104916A CN 200910258179X A CN200910258179X A CN 200910258179XA CN 200910258179 A CN200910258179 A CN 200910258179A CN 102104916 A CN102104916 A CN 102104916A
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Abstract
The invention discloses a data scheduling method and system. The method comprises the following steps: an RNC (Radio Network Controller) configures the priority of an RLC PDU (Radio Link Control Protocol Data Unit) according to the data packet attribute of the RLC PDU; and the RNC transmits the RLC PDU with a priority indication to a base station so that the base station can determine the sequence of data packet scheduling in an MAC (Medium Access Control) layer according to the priority of the RLC PDU. Through the invention, the base station can determine the sequence of data packet scheduling in the MAC layer according to the priority attribute of the RLC PDU, and thus the time delay of RTT (Radio Transmission Technology) is reduced.
Description
Technical field
The present invention relates to communication field, relate in particular to a kind of data dispatching method and system.
Background technology
WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) and TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, TD SDMA) system evolved arrives HSPA+ after the stage, agreement has defined three kinds of HS-DSCH (High-Speed Downlink Shared Channel at Iub interface, high-speed downlink shared channel) data frame structure, be respectively applied for HSDPA (High Speed Downlink Packet Access), the non-CELL_PCH/URA_PCH attitude of HSPA+, the HS-DSCH transmission of HSPA+CELL_PCH/URA_PCH attitude, wherein, three kinds of HS-DSCH data frame structures are with reference to shown in Figure 1.
RTT (Round Trip Time, round-trip delay) is one of important indicator of weighing wireless network performance, comprises Access Layer time delay and Non-Access Stratum time delay.The time delay that the main finger speech sound coding of Non-Access Stratum time delay is introduced; The Access Layer time delay comprises that grand diversity merges time delay, MAC (Medium Access Control, medium access control) layer scheduling time delay, retransmission delay time, wave point propagation delay, processing delay that time delay, convolution code and Turbo code interweave and introduce.For the non real-time Packet Service, the transformable part in Yanzhong is MAC layer scheduling time delay and retransmission delay time during RTT.
Consider from the angle that reduces the RTT time delay, the MAC scheduler can be according to RNC (RadioNetwork Controller, radio network controller) the RLC PDU that issues (Radio Link ControlProtocol Data Unit, protocol data unit of wireless links control layer) priority characteristic priority scheduling high priority RLC PDU, to reduce MAC layer scheduling time delay and retransmission delay time, and then reduce the RTT time delay, need in the HS-DSCH of Iub interface Frame, indicate the priority attribute of RLC PDU for supporting this function.
Queue priority, packet size are only distinguished in existing Iub interface HS-DSCH data frame structure definition, do not consider the priority of data packets characteristic, promptly in the HS-DSCH data frame structure, can't distinguish retransmission data packet may, status poll bag, signaling packet, new biography packet etc.
In sum, exist the HS-DSCH data frame structure not consider the problem that influences the RTT time delay that the priority of data packets characteristic causes as can be known in the prior art, so do not propose effective solution in the correlation technique as yet.
Summary of the invention
Because prior art exists the HS-DSCH data frame structure not consider the problem that influences the RTT time delay that the priority of data packets characteristic causes, for this reason, the invention provides a kind of data dispatching method and system, wherein:
Data dispatching method provided by the invention comprises: RNC is a RLC PDU configuration preference level according to the packet attribute of RLC PDU; The RLC PDU that RNC will carry the priority indication is sent to the base station, so that the order of MAC layer data packet scheduling is determined in the base station according to the priority of RLC PDU.
Preferably, the packet attribute of RLC PDU comprise following one of at least: formation under retransmission packet, status poll bag, signaling packet, new transmission packet, data packet length, the packet.
Preferably, the RLC PDU that RNC will carry the priority indication is sent to the base station, and further comprise: RNC determines the priority of MAC-d/c PDU according to the priority of RLC PDU; RNC will have the MAC-d/c PDU composition HS-DSCH Frame of equal priority by Iub interface or the different pieces of information piece of HS-DSCH Frame is sent to the base station, wherein, uses the priority of the idle bit indication MAC-d/c PDU of HS-DSCH Frame.
Preferably, use the priority of the idle bit indication MAC-d/c PDU of HS-DSCH Frame, further comprise: the priority of using the idle bit indication MAC-d/c PDU of HS-DSCH data frame header part or payload user data part.
Preferably, use the priority of the idle bit indication MAC-d/c PDU of HS-DSCH data frame header part or payload user data part, comprise that further following mode one of at least: the priority of using the idle bit of HS-DSCH Frame to indicate each Mac-d/c PDU; Or the idle bit that uses the HS-DSCH Frame priority of indicating every group of Mac-d/c PDU; Or the idle bit that uses the HS-DSCH Frame priority of indicating whole Mac-d/c PDU.
Data dispatch provided by the invention system comprises: RNC, and the packet attribute that is used for according to RLC PDU is a RLC PDU configuration preference level, and the RLC PDU that will carry the priority indication is sent to the base station; The base station is used to receive the RLC PDU from RNC, and determines the order of MAC layer data packet scheduling according to the priority that RLC PDU carries.
Preferably, the packet attribute of RLC PDU comprise following one of at least: formation under retransmission packet, status poll bag, signaling packet, new transmission packet, data packet length, the packet.
Preferably, RNC further comprises: the priority configuration module, and the packet attribute that is used for according to RLC PDU is a RLC PDU configuration preference level, and determines the priority of MAC-d/cPDU according to the priority of RLC PDU; Molded tissue block is used for having the MAC-d/c PDU composition HS-DSCH Frame of equal priority or the different pieces of information piece of HS-DSCH Frame, wherein, uses the priority of the idle bit indication MAC-d/c PDU of HS-DSCH Frame; Sending module is used for by Iub interface the HS-DSCH Frame of molded tissue block structure or the different pieces of information piece of HS-DSCH Frame being sent to the base station.
Preferably, molded tissue block uses the priority of the idle bit indication MAC-d/c PDU of HS-DSCH data frame header part or payload user data part.
Preferably, molded tissue block uses the priority of the idle bit indication MAC-d/c PDU of HS-DSCH Frame, comprises that further following mode one of at least: the priority of using the idle bit of HS-DSCH Frame to indicate each Mac-d/c PDU; Or the idle bit that uses the HS-DSCH Frame priority of indicating every group of Mac-d/c PDU; Or the idle bit that uses the HS-DSCH Frame priority of indicating whole Mac-d/c PDU.
Compared with prior art, according to technique scheme of the present invention, is this RLC PDU configuration preference level attribute that issues by RNC according to the packet attribute of RLC PDU, make the base station can determine the order of MAC layer data packet scheduling, thereby reach the technique effect that reduces the RTT time delay according to the priority attribute of RLC PDU.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Figure 1A, 1B, 1C are three kinds of structural representations of Iub interface HS-DSCH Frame in the prior art;
Fig. 2 is the schematic diagram according to the data dispatching method of the embodiment of the invention;
Fig. 3 is a kind of structural representation according to the Iub interface HS-DSCH Frame Type1 of the embodiment of the invention;
Fig. 4 is another structural representation according to the Iub interface HS-DSCH Frame Type1 of the embodiment of the invention;
Fig. 5 is a kind of structural representation according to the Iub interface HS-DSCH Frame Type2 of the embodiment of the invention;
Fig. 6 is a kind of structural representation according to the Iub interface HS-DSCH Frame Type3 of the embodiment of the invention;
Fig. 7 is the block diagram according to the data dispatch system of the embodiment of the invention.
Embodiment
Main thought of the present invention mainly is, RNC is this RLC PDU configuration preference level attribute that issues according to the packet attribute of RLC PDU, and send to NodeB by the RLCPDU that Iub interface will carry priority indication, make that the base station can be according to the RLC PDU of the priority attribute priority scheduling high priority of RLC PDU, thereby reach the technique effect that reduces the RTT time delay.
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 drawings and the specific embodiments.
According to embodiments of the invention, a kind of data dispatching method has been proposed.
Fig. 2 is the schematic diagram according to the data dispatching method of the embodiment of the invention, and as shown in Figure 2, this method comprises:
Step S202, RNC is a RLC PDU configuration preference level according to the packet attribute of RLC PDU;
The RLC PDU that step S204, RNC will carry the priority indication is sent to the base station, so that the order of MAC layer data packet scheduling is determined in the base station according to the priority of RLC PDU.
Below above-mentioned processing is described in detail.
One, step S202
RNC is according to the priority attribute of the packet attribute configuration RLC PDU of RLC PDU, wherein, the packet attribute of RLC PDU includes but not limited to following information: retransmission packet, status poll bag, signaling packet, new transmission packet, data packet length, the affiliated formation of packet etc., RNC is divided into the priority attribute of RLC PDU multiple, and the priority attribute of RLC PDU and packet attribute exist one to one or the mapping relations of one-to-many.
Enumerating two kinds of configuration modes below illustrates, configuration mode one: RNC is that the RLC PDU of retransmission packet, status poll bag, signaling packet is configured to the high priority attribute with the packet attribute, is that the RLC PDU of new transmission packet is configured to the low priority attribute with the packet attribute; Configuration mode two: RNC is that the RLC PDU of signaling packet is configured to the limit priority attribute with the packet attribute, with the packet attribute is that the RLC PDU of status poll bag is configured to time high priority attribute, with the packet attribute is that the RLCPDU of retransmission packet is configured to the medium priority attribute, is that the RLC PDU of new transmission packet is configured to the low priority attribute with the packet attribute.Only for illustrating, do not limit to range of application of the present invention at this with this.
Two, step S204
By Iub interface the RLC PDU that has the priority indication is sent to NodeB.RNC determines the priority attribute of MAC-d/c (MAC layer special use/control) PDU according to the priority attribute of RLC PDU, and the different pieces of information piece of the MAC-d/c PDU of equal priority formation, equal length, identical MAC-d/c PDU priority attribute being formed HS-DSCH Frame or HS-DSCH Frame respectively sends.MAC-d/c PDU priority can use any idle bit and the combination in any thereof of HS-DSCH data frame header or payload user data part to represent, and, the indication of MAC-d/c PDU priority can act on whole MAC-d/c PDU or part MAC-d/c PDU, specifically includes but not limited to following mode:
Mode one, the priority attribute that the idle bit of use HS-DSCH Frame is indicated each Mac-d/c PDU;
Mode two, the priority attribute that the idle bit of use HS-DSCH Frame is indicated every group of Mac-d/c PDU;
Mode three, the priority attribute that the idle bit of use HS-DSCH Frame is indicated whole Mac-d/c PDU.
Can better understand the present invention in conjunction with Fig. 3 to Fig. 6, Fig. 3 illustrates HS-DSCH Frame Type1 structure and uses the priority attribute that the header idle bit is indicated all MAC-d PDU; Fig. 4 illustrates the priority attribute that idle bit is indicated corresponding MAC-d PDU that HS-DSCH Frame Type1 structure is used each MAC-d PDU field of payload user data part; Fig. 5 illustrates HS-DSCH Frame Type2 structure and uses an idle bit in each data block control information in the header, the priority attribute of all MAC-d/c PDU of indication respective data blocks; Fig. 6 illustrates HS-DSCH Frame Type3 structure and uses an idle bit in each data block control information in the header, the priority attribute of all MAC-c PDU of indication respective data blocks.
Be example with RNC to the framing process of HS-DSCH Frame Type2 below, describe specific implementation process of the present invention in detail.
1, RNC determines the priority attribute of MAC-d/c PDU according to the priority attribute of RLC PDU, if the RLC PDU of MAC-d/c PDU carrying is the high priority attribute, then MAC-d/c PDU is the high priority attribute, otherwise is the low priority attribute.The RLCPDU priority attribute that is mapped to same MAC-d/c PDU must be identical.
2, RNC will form data block respectively according to priority attribute from the MAC-d/c PDU of the same logic channel equal length of same priority formation, the MAC-d/c PDU that is a plurality of low priorities forms a lower-priority data piece, and the MAC-d/c PDU of a plurality of high priorities forms a high-priority data piece;
3, RNC selects high-priority data piece framing according to rule of specialty (the packet number that comprises as the high-priority data piece is greater than default thresholding), otherwise selects lower-priority data piece framing;
If 4 participation framings is the high-priority data piece, the priority indication of the respective data blocks control information of the frame processing module HS-DSCH Frame Type2 header of RNC is set to 1, otherwise is 0.
Then, be example with NodeB to the processing procedure of HS-DSCH Frame Type2 below, describe specific implementation step of the present invention in detail.
1, the frame processing module of NodeB is carried out CRC check according to new HS-DSCH Frame Type2 definition extraction header;
2, judge whether the header CRC check is correct, the frame processing module of correct then NodeB is extracted the priority indication bit PRI1～PRIn of each data block according to new HS-DSCH Frame Type2 definition, otherwise abandons the Frame that receives;
3, the frame processing module of NodeB is carried out payload user data partial C RC verification;
4, whether judgment data payload CRC check is correct, correct then extract the MAC-d/c PDU of each data block according to header fields, otherwise abandons the Frame that receives;
5, data block for each data block, is carried out following steps from 1 to n circulation;
If the priority indication bit position PRIm of 6 data block m is 1, then execution in step 7, otherwise skip to step 8;
7, the MAC-ehs entity of NodeB is put into special buffering area with the MAC-d/c PDU of data block m, the special processing of the row major of going forward side by side scheduling;
8, the MAC-ehs entity of NodeB is put into the buffering area of queue priority indication with the MAC-d/c PDU of data block m, handles according to the routine scheduling.
According to embodiments of the invention, also provide a kind of data dispatch system.
Fig. 7 is the block diagram according to the data dispatch system of the embodiment of the invention, and as shown in Figure 7, this system comprises: RNC10 and base station 20, wherein:
RNC10, the packet attribute that is used for according to RLC PDU is a RLC PDU configuration preference level, and the RLC PDU that will carry the priority indication is sent to the base station, wherein, the packet attribute of RLC PDU comprise following one of at least: formation under retransmission packet, status poll bag, signaling packet, new transmission packet, data packet length, the packet.
Base station 20 is used to receive the RLC PDU from RNC, and determines the order of MAC layer data packet scheduling according to the priority that RLC PDU carries.
As shown in Figure 7, RNC10 may further include: priority configuration module 110, and the packet attribute that is used for according to RLC PDU is a RLC PDU configuration preference level, and determines the priority of MAC-d/c PDU according to the priority of RLC PDU; Molded tissue block 120, with be connected with priority configuration module 110, in the MAC-d/c PDU composition HS-DSCH Frame that will have equal priority or the different pieces of information piece of HS-DSCH Frame, wherein, use the priority of the idle bit indication MAC-d/c PDU of HS-DSCH Frame; Sending module 130 is connected with molded tissue block 120, is used for by Iub interface the HS-DSCH Frame of molded tissue block 120 structures or the different pieces of information piece of HS-DSCH Frame being sent to base station 20.
And molded tissue block 120 uses the priority of the idle bit indication MAC-d/c PDU of HS-DSCH data frame header part or payload user data part.Further, molded tissue block 120 uses the priority that the idle bit of HS-DSCH Frame is indicated each Mac-d/c PDU; Or the idle bit that uses the HS-DSCH Frame priority of indicating every group of Mac-d/c PDU; Or the idle bit that uses the HS-DSCH Frame priority of indicating whole Mac-d/c PDU.
To sum up, the technique scheme according to the present invention, is this RLC PDU configuration preference level attribute that issues by RNC according to the packet attribute of RLC PDU, make the base station can determine the order of MAC layer data packet scheduling, thereby reach the technique effect that reduces the RTT time delay according to the priority attribute of RLC PDU
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (10)
1. a data dispatching method is characterized in that, comprising:
Radio network controller (RNC) is described RLC PDU configuration preference level according to the packet attribute of protocol data unit of wireless links control layer RLC PDU;
The described RLC PDU that described RNC will carry the priority indication is sent to the base station, so that the order of medium access control MAC layer data packet scheduling is determined in described base station according to the priority of described RLC PDU.
2. method according to claim 1 is characterized in that, the packet attribute of described RLC PDU comprise following one of at least: formation under retransmission packet, status poll bag, signaling packet, new transmission packet, data packet length, the packet.
3. method according to claim 2 is characterized in that, the described RLC PDU that described RNC will carry the priority indication is sent to the base station, further comprises:
Described RNC determines the priority of MAC layer special use/control MAC-d/cPDU according to the priority of described RLC PDU;
Described RNC will have the MAC-d/c PDU composition HS-DSCH Frame of equal priority by Iub interface or the different pieces of information piece of HS-DSCH Frame is sent to described base station, wherein, the priority of using the idle bit of HS-DSCH Frame to indicate described MAC-d/c PDU.
4. method according to claim 3 is characterized in that, the priority that the idle bit of described use HS-DSCH Frame is indicated described MAC-d/c PDU further comprises:
The priority of using HS-DSCH data frame header part or payload user data idle bit partly to indicate described MAC-d/c PDU.
5. method according to claim 4 is characterized in that, the priority of using the idle bit of HS-DSCH data frame header part or payload user data part to indicate described MAC-d/c PDU comprises that further following mode is one of at least:
The priority that the idle bit of use HS-DSCH Frame is indicated each Mac-d/c PDU; Or
The priority that the idle bit of use HS-DSCH Frame is indicated every group of Mac-d/c PDU; Or
The priority that the idle bit of use HS-DSCH Frame is indicated whole Mac-d/c PDU.
6. a data dispatch system is characterized in that, comprising:
RNC, the packet attribute that is used for according to RLC PDU is described RLC PDU configuration preference level, and the described RLC PDU that will carry priority indication is sent to the base station;
Described base station is used to receive the RLC PDU from described RNC, and determines the order of MAC layer data packet scheduling according to the priority that described RLC PDU carries.
7. system according to claim 6 is characterized in that, the packet attribute of described RLC PDU comprise following one of at least: formation under retransmission packet, status poll bag, signaling packet, new transmission packet, data packet length, the packet.
8. system according to claim 7 is characterized in that, described RNC further comprises:
The priority configuration module, the packet attribute that is used for according to RLC PDU is described RLC PDU configuration preference level, and determines the priority of MAC-d/c PDU according to the priority of described RLC PDU;
Molded tissue block is used for having the MAC-d/c PDU composition HS-DSCH Frame of equal priority or the different pieces of information piece of HS-DSCH Frame, wherein, and the priority that the idle bit of use HS-DSCH Frame is indicated described MAC-d/c PDU;
Sending module is used for by Iub interface the HS-DSCH Frame of described molded tissue block structure or the different pieces of information piece of HS-DSCH Frame being sent to described base station.
9. system according to claim 8 is characterized in that, the priority that described molded tissue block uses the idle bit of HS-DSCH data frame header part or payload user data part to indicate described MAC-d/cPDU.
10. system according to claim 9 is characterized in that, the priority that described molded tissue block uses the idle bit of HS-DSCH Frame to indicate described MAC-d/c PDU comprises that further following mode is one of at least:
The priority that the idle bit of use HS-DSCH Frame is indicated each Mac-d/c PDU; Or
The priority that the idle bit of use HS-DSCH Frame is indicated every group of Mac-d/c PDU; Or
The priority that the idle bit of use HS-DSCH Frame is indicated whole Mac-d/c PDU.
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Application publication date: 20110622 |