CN100596099C - Radio access bear data transmission method - Google Patents
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Abstract
This invention discloses a transmission method for radio access load data including: sorting data packets on a RAB and putting a same kind of data packets in a same sending queue, setting a dispatch strategy to dispatch the queue according to the strategy and sending out the data packets in the queue, which can ensure different QoS requirements of different services.
Description
Technical field
The present invention relates to wireless communication technology, relate in particular to a kind of RAB (Radio AccessBearer, RAB) data transmission method.
Background technology
Along with developing rapidly of wireless communication technology, third generation wireless telecommunication system (3G) provides a large amount of colourful business for the user, as traditional speech business and become the Various types of data business that 3G serves maximum bright spot.In the R99 version, the dedicated channel RAB that can provide maximum rate can reach 2M, and along with R5, R6 version high speed downlink grouped inserts (High Speed DownlinkPacket Access, HSDPA) technology and high speed uplink packet insert (High Speed Uplink PacketAccess, HSUPA) introducing of technology, the up-downgoing speed of data service even can reach about 10M, this makes the user really experience wireless Internet access, wireless video, the enjoyment that many wireless data application services such as wireless downloading are brought, we can say that third generation wireless telecommunication system has been opened brand-new wireless digital epoch.
Data field (Packet Switched, PS) RAB can be divided into four kinds by transport-type, be conversation class, stream class, interactive class and background classes, wherein, preceding two kinds of types of service are real-time such as respective session, the Streaming Media business of having relatively high expectations respectively, the two kinds of types of service in back are called best results (Best Effort again, BE) business, just usually said Best-Effort service, corresponding delay requirement is lower but business that accuracy requirement is higher, downloads as web page browsing, file transfer protocol (FTP) (FTP) etc.
In actual applications, a common RAB will carry multiple application data, such as, the user is after setting up wireless access, may carry out web page browsing, FTP download or the operations such as (EMAIL) of sending and receiving e-mail simultaneously, in user's operating process, the packet of various application all can send or receive by this RAB.Because the difference of various application features, speed expectation to transfer of data also is not quite similar, how to guarantee to be based upon one between the different application on the RAB fairness, (Quality of Service QoS) has become the focus that industry each side pays close attention to embody separately service quality.Existing RAB data transmission method mainly contains following several:
One, the packet unification among RAB is mapped to a transmission channel by a logic channel and sends, as dedicated channel (Dedicated Channel, DCH) or the specialized media access control under HSDPA stream (Mac-d flow), that is to say that the packet among RAB sends according to arriving first the principle of sending out earlier fully.
Usually the user will carry out the operation of multiple application on a RAB, various application are had nothing in common with each other for the rate requirement of transfer of data, such as, the user carries out FTP simultaneously and downloads and web page browsing, generally speaking, the user wishes that obviously the webpage of asking is responded fast, and to the not special concern that whether slightly descends of FTP downloading rate.But, because the packet among the RAB is to dispatch according to arriving first the principle of sending out earlier fully, therefore, Chuan Shu FTP data download bag One's name is legion if desired, will certainly cause the web page browsing packet to be subjected to blocking up to a certain degree so, can't satisfy the QoS demand of miscellaneous service, also not satisfy the performance requirement of user's practical operation.
Two, (the interface buffer memory of just usually said cable network and wireless network is cached with the packet that spider lines transmits for Radio Network Controller, the RNC) buffer memory in by radio network controller.Radio Link is the bottleneck of whole end-to-end link, the interface buffer memory also is considered to the buffer memory of bottleneck usually, it can play packet, the certain paroxysmal effect of tolerance that is cached with spider lines and transmits, and can also guarantee the utilance of bandwidth of air-interface simultaneously to a certain extent.
Because the size of interface buffer memory is normally distributed when setting up wireless access, therefore, if it is less that buffer memory distributes, so the time in the face of higher paroxysmal packet or data traffic increase, will occur that buffer memory overflows and packet loss continuously, for the stream that response is arranged based on this class of transmission control protocol (TCP), packet loss can cause that congestion window sharply reduces, throughput reduces; If buffer memory distributes enough greatly, can guarantee not packet loss, this at first needs very big buffer memory, and the utilance of buffer memory is not high, can not effectively utilize resource, and big buffer memory can make the queue queue in the buffer memory very long, not only can increase the queuing delay of packet in buffer memory, cause the increase of end-to-end time delay, also the situation that a stream is monopolized buffer memory can occur, cause that other stream time delays increase greatly, throughput reduces, influence the fairness between the miscellaneous service.Such as, the user is on a link that is carrying out ftp file transmission, when using HTTP(Hypertext Transport Protocol) to carry out web page browsing, if ftp flow takies more buffer memory, will cause the very long queuing delay of packet experience of newly-established HTTP business so, not only reduced throughput, also can have a strong impact on interactivity, reduce user's business impression, can't satisfy professional QoS demand, even also might make initial connection set up request because overtime and fail.In addition, because the variability of the sudden and data traffic of packet can not just can be distributed a sizeable buffer memory when wireless access is set up.
Three, adopt active queue management (Active Queue Management, AQM) the docking port buffer memory manages, predict imminent congested by the observation that buffer memory is taken, and notify the transmitting terminal changing down by active packet loss or mark, to avoid congested, obtain the compromise of throughput and time delay.
Though adopt AQM can obtain the compromise of throughput and time delay,, for different business, what have may wish that bigger throughput is arranged, and what have may wish that lower time delay is arranged, and AQM can't handle respectively according to the QoS demand of business.Such as the not requirement of time delay of, ftp business itself, but throughput is had requirement, adopt AQM after, can reduce throughput to a certain extent and exchange lower time delay for, this is nonsensical for ftp business.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of radio access bear data transmission method, guarantee the different QoS requirements of different business.
For achieving the above object, technical scheme provided by the invention may further comprise the steps:
A, the packet that is carried on the RAB RAB is classified, the packet of same classification is put in the same transmit queue;
B, scheduling strategy is set, described formation is dispatched, the packet in the described formation is sent according to the scheduling strategy that is provided with.
Wherein, the described classification of steps A comprises: in the PDCP PDCP of RAB correspondence entity the packet that is carried on the RAB is classified.
Described in the PDCP entity packet classification comprises: the PDCP entity is resolved the packet packet header that is carried on the RAB, according to the classification of packet header specified data bag.
Described PDCP entity is resolved packet packet header and is comprised: the PDCP entity to network layer protocol packet header of packet or/and transport layer protocol packet header or/and application layer protocol packet header resolve.
The described classification of steps A comprises: according to the service quality QoS characteristic of packet, the packet that is carried on the RAB is classified.
When described QoS characteristic was the delay requirement characteristic, described classification comprised: video request program, Streaming Media are classified as high time delay grade class; Web page browsing, instant messaging are classified as middle time delay grade class; File transfer protocol (FTP) FTP is downloaded, and the EMAIL that sends and receive e-mail is classified as low time delay grade class.
Wherein, the described scheduling strategy that is provided with of step B comprises: priority is set;
The described scheduling according to the scheduling strategy that is provided with comprises: according to the priority that is provided with described formation is dispatched.
The described priority that is provided with comprises: the QoS characteristic according to packet in the formation is that formation is provided with priority.
When described QoS characteristic is the delay requirement characteristic, describedly according to the QoS characteristic priority is set and comprises: the delay requirement characteristic according to packet in the formation is that formation is provided with priority, and the delay requirement characteristic of packet just is directly proportional in the priority height of described formation and the formation.
The described scheduling strategy that is provided with of step B comprises: the fairness strategy is set;
The described scheduling according to the scheduling strategy that is provided with comprises: dispatch according to the time length that formation is not scheduled, the time length that the scheduling precedence and the formation of formation are not scheduled is directly proportional.
Before sending, packet further comprises: active queue management is carried out in described formation.
Describedly active queue management carried out in formation comprise: according to the packet QoS characteristic in the formation or/and service traffics or/and professional linking number, determine the active queue management parameter of formation, and active queue management is carried out in formation according to the active queue management parameter of determining.
Described QoS characteristic is the delay requirement characteristic, when described active queue management parameter is object queue length,
Describedly determine that according to the QoS characteristic active queue management parameter comprises: the delay requirement characteristic according to packet in the formation is determined object queue length, and the delay requirement characteristic of packet just is inversely proportional in the length of described object queue length and the formation.
When described active queue management parameter is the mark thresholding,
Describedly determine that according to service traffics the active queue management parameter comprises: determine the mark thresholding of formation according to the service traffics in the formation, the mark thresholding size of described formation is inversely proportional to the service traffics size in the formation;
Describedly determine that according to professional linking number the active queue management parameter comprises: determine the mark thresholding of formation according to the professional linking number in the formation, how many mark thresholding sizes of described formation is inversely proportional to the professional linking number in the formation.
When described active queue management parameter is marking probability,
Describedly determine that according to service traffics the active queue management parameter comprises: determine the marking probability of formation according to the service traffics in the formation, the marking probability height of described formation is directly proportional with the service traffics size in the formation;
Describedly determine that according to professional linking number the active queue management parameter comprises: determine the marking probability of formation according to the professional linking number in the formation, how many marking probability height of described formation is directly proportional with the professional linking number in the formation.
In the process of carrying out active queue management, further comprise: the active queue management parameter is dynamically adjusted.
This shows that the present invention is by classifying to the packet that is carried on the RAB, different classes of packet is put into respectively in the different transmit queues sends, realized a separately transmission that RAB goes up the miscellaneous service packet; And, go up the different QoS requirements of different business in order to guarantee a RAB, scheduling strategy can be set, and according to the scheduling strategy that is provided with each formation is dispatched, such as, by priority is set, realize the preferential transmission of delay requirement higher traffic data, guarantee the promptness that these data send; In addition, also can be by active queue management is carried out in each formation respectively, further guarantee professional QoS, such as, the length of delay requirement higher traffic data bag place formation is maintained short level,, guarantee the customer service impression to reduce end-to-end time delay, the length of the low business data packet place formation of delay requirement is maintained long level, to guarantee the throughput requirement.In brief, method provided by the present invention can guarantee that a RAB goes up the different QoS requirements of different business, guarantees user's business impression, improves quality of service.
Description of drawings
Fig. 1 is the radio access bear data transmission method flow chart among the present invention;
Fig. 2 is the radio access bear data transmission method flow chart in the embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, the embodiment that develops simultaneously with reference to the accompanying drawings is described in further detail the present invention.
Referring to shown in Figure 1, the radio access bear data transmission method among the present invention mainly may further comprise the steps:
Step 101: the packet that is carried on the RAB RAB is classified, the packet of same classification is put in the same transmit queue.
Step 102: scheduling strategy is set, described formation is dispatched, the packet in the described formation is sent according to the scheduling strategy that is provided with.
In the PS business, no matter be transmitting uplink data or downlink data transmission, data all can be passed through PDCP (Packet Data Convergence Protocol, PDCP), Radio Link control (Radio Link Control, RLC), specialized media access control protocol entities such as (Mac-d) delivers successively.Be example with descending packet data transmission below, the inventive method be elaborated that referring to shown in Figure 2, the RAB data transmission method in the present embodiment mainly comprises following step:
Step 201: downlink grouped data such as point-to-point protocol (Point to Point Protocol, PPP) message, the 4th edition (Internet Protocol version 4 of Internet Protocol, IPv4) message, or Internet Protocol sixth version (Internet Protocol version 6, IPv6) message etc., user plane part (User plane part of GPRS Tunneling Protocol by general packet wireless service tunnel protocol, GTPU) the encapsulation back is by GPRS Support Node (GPRS Support Node, GSN) send to RNC, Iu mouth user face (the Iu User Plane of PS business, IUUP) adopt transparent mode, the GTPU packet directly is delivered to the PDCP entity of RAB correspondence.
Step 202:PDCP entity is classified to the packet that is carried on the RAB.
Because the RAB in PS territory can only corresponding PDCP entity, therefore, can classify to the packet that is carried on the RAB in the PDCP of RAB correspondence entity.The PDCP entity is resolved the packet packet header that is carried on the RAB, according to the classification of packet header specified data bag, such as, network layer protocol packet header of packet or transport layer protocol packet header or application layer protocol packet header are resolved; Perhaps, the network layer protocol packet header and the transport layer protocol packet header of packet are resolved; Perhaps, network layer protocol packet header, transport layer protocol packet header and the application layer protocol packet header of packet are resolved.
Classification can be carried out according to the QoS characteristic of packet, such as, classify according to the delay requirement characteristic of each packet, the time delay grade of application such as video request program, Streaming Media is configured to height, be classified as high time delay grade class; During the time delay grade of application such as web page browsing, instant messaging is configured to, time delay grade class in being classified as; FTP is downloaded, and the time delay grade of application such as transmitting-receiving EMAIL is configured to low, is classified as low time delay grade class.
Step 203: different classes of packet is put into respectively in the different transmit queues.
Step 204: individual queue is carried out active queue management.
Can be according to the packet QoS characteristic in each formation or/and service traffics, are determined the active queue management parameter of each formation or/and professional linking number, and respectively active queue management is carried out in each formation according to the active queue management parameter of determining.Wherein, described active queue management parameter comprises object queue length, mark thresholding, marking probability etc.
Such as, determine the object queue length of each formation according to the delay requirement characteristic in each queuing data bag QoS characteristic, with the length of the object queue length of each formation be arranged to each formation in the delay requirement characteristic of packet just be inversely proportional to.That is to say, the object queue length of high time delay grade business data packet place formation is maintained short level,, guarantee the customer service impression to reduce end-to-end time delay; The object queue length of low time delay grade business data packet place formation is maintained long level, to guarantee the throughput requirement.
Can also determine the mark thresholding of formation according to service traffics or professional linking number, such as, with the mark thresholding size of formation be arranged to formation in the service traffics size be inversely proportional to, how much be inversely proportional to professional linking number in the formation.In addition, can also determine the marking probability of formation according to service traffics or professional linking number, such as, the marking probability of formation just is arranged to be directly proportional with service traffics size in the formation, how much be directly proportional with professional linking number in the formation.
In addition, in the process of active queue management, also can the active queue management parameter dynamically be adjusted according to the variation of physical condition.
Wherein, step 204 is optional steps.
Step 205: scheduling strategy is set, each formation is dispatched, the packet in the individual queue is sent according to the scheduling strategy that is provided with.
Described scheduling strategy can be the priority setting, such as, be respectively individual queue according to the QoS characteristic of packet in each formation transmission priority is set, according to the priority that is provided with each formation is dispatched.As for each formation priority being set according to the delay requirement characteristic in the QoS characteristic of packet in each formation, with the priority of each formation just be arranged to each formation in the delay requirement characteristic of packet just be directly proportional.That is to say that the priority of high time delay grade business data packet place formation is set to height, the priority of low time delay grade business data packet place formation is set to low, guarantees the timely transmission of high time delay business datum by the priority scheduling high-priority queue.
In addition, in order to guarantee the fairness between the various application, when scheduling, also should take all factors into consideration variety of issue, such as, have the scheduling problem between the formation of equal priority, prevent the problem that the formation of low priority can not be scheduled for for a long time.Here can solve by the fairness strategy is set, such as when dispatching, to dispatch according to the time length that formation is not scheduled, the time length that the scheduling precedence and the formation of formation are not scheduled is directly proportional, that is to say the formation that priority scheduling is not scheduled for for a long time.
Need to prove that method provided by the present invention is not only applicable to downlink data transmission, also be applicable to transmitting uplink data, processing procedures such as the classification in the transmitting uplink data, active queue management, scheduling are described consistent with Fig. 2, describe in detail no longer one by one here.
As seen, method provided by the present invention can guarantee that a RAB goes up the different QoS requirements of different business, guarantees user's business impression, improves quality of service.
The above has carried out further detailed description to purpose of the present invention, technical scheme and beneficial effect; institute is understood that; the above is not in order to restriction the present invention; within the spirit and principles in the present invention all; any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1, a kind of radio access bear data transmission method is characterized in that, this method may further comprise the steps:
A, according to the service quality QoS characteristic of packet, in the PDCP PDCP of RAB RAB correspondence entity, the packet that is carried on the RAB is classified, the packet of same classification is put in the same transmit queue;
B, according to the packet QoS characteristic in each formation or/and service traffics or/and professional linking number, determine the active queue management parameter of each formation, and active queue management is carried out in each formation respectively according to the active queue management parameter of each formation of determining; Scheduling strategy is set, described formation is dispatched, the packet in the described formation is sent according to the scheduling strategy that is provided with.
2, method according to claim 1 is characterized in that, described in the PDCP entity packet classification comprises: the PDCP entity is resolved the packet packet header that is carried on the RAB, according to the classification of packet header specified data bag.
3, method according to claim 2, it is characterized in that described PDCP entity is resolved packet packet header and comprised: the PDCP entity to network layer protocol packet header of packet or/and transport layer protocol packet header or/and application layer protocol packet header resolve.
4, method according to claim 1 is characterized in that, when described QoS characteristic was the delay requirement characteristic, described classification comprised: video request program, Streaming Media are classified as high time delay grade class; Web page browsing, instant messaging are classified as middle time delay grade class; File transfer protocol (FTP) FTP is downloaded, and the EMAIL that sends and receive e-mail is classified as low time delay grade class.
5, method according to claim 1 is characterized in that, the described scheduling strategy that is provided with of step B comprises: priority is set;
The described scheduling according to the scheduling strategy that is provided with comprises: according to the priority that is provided with described formation is dispatched.
6, method according to claim 5 is characterized in that, the described priority that is provided with comprises: the QoS characteristic according to packet in the formation is that formation is provided with priority.
7, method according to claim 6, it is characterized in that, when described QoS characteristic is the delay requirement characteristic, describedly according to the QoS characteristic priority is set and comprises: the delay requirement characteristic according to packet in the formation is that formation is provided with priority, and the delay requirement characteristic of packet just is directly proportional in the priority height of described formation and the formation.
8, method according to claim 1 is characterized in that, the described scheduling strategy that is provided with of step B comprises: the fairness strategy is set;
The described scheduling according to the scheduling strategy that is provided with comprises: dispatch according to the time length that formation is not scheduled, the time length that the scheduling precedence and the formation of formation are not scheduled is directly proportional.
9, method according to claim 1 is characterized in that, described QoS characteristic is the delay requirement characteristic, when described active queue management parameter is object queue length,
Describedly determine that according to the QoS characteristic active queue management parameter comprises: the delay requirement characteristic according to packet in the formation is determined object queue length, and the delay requirement characteristic of packet just is inversely proportional in the length of described object queue length and the formation.
10, method according to claim 1 is characterized in that, when described active queue management parameter is the mark thresholding,
Describedly determine that according to service traffics the active queue management parameter comprises: determine the mark thresholding of formation according to the service traffics in the formation, the mark thresholding size of described formation is inversely proportional to the service traffics size in the formation;
Describedly determine that according to professional linking number the active queue management parameter comprises: determine the mark thresholding of formation according to the professional linking number in the formation, how many mark thresholding sizes of described formation is inversely proportional to the professional linking number in the formation.
11, method according to claim 1 is characterized in that, when described active queue management parameter is marking probability,
Describedly determine that according to service traffics the active queue management parameter comprises: determine the marking probability of formation according to the service traffics in the formation, the marking probability height of described formation is directly proportional with the service traffics size in the formation;
Describedly determine that according to professional linking number the active queue management parameter comprises: determine the marking probability of formation according to the professional linking number in the formation, how many marking probability height of described formation is directly proportional with the professional linking number in the formation.
12, method according to claim 1 is characterized in that, further comprises in the process of carrying out active queue management: the active queue management parameter is dynamically adjusted.
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Cited By (1)
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| CN104581424A (en) * | 2013-10-25 | 2015-04-29 | 华为技术有限公司 | Method, related equipment and system for streaming media transmission |
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| WO2010107355A1 (en) * | 2009-03-20 | 2010-09-23 | Telefonaktiebolaget L M Ericsson (Publ) | Active queue management for wireless communication network uplink |
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| EP2713554A4 (en) * | 2011-06-28 | 2014-08-27 | Huawei Tech Co Ltd | Method, user equipment and base station for controlling uplink application layer service |
| US9473974B2 (en) * | 2012-05-30 | 2016-10-18 | The University Of Hong Kong | Enhancing AQM to combat wireless losses |
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| CN110290554A (en) * | 2019-06-28 | 2019-09-27 | 京信通信系统（中国）有限公司 | Data transmission processing method, device and communication equipment |
| CN110493822B (en) * | 2019-08-06 | 2021-08-24 | 京信网络系统股份有限公司 | Point-to-multipoint communication device and system |
| CN110519178B (en) * | 2019-08-07 | 2023-05-12 | 京信网络系统股份有限公司 | Low-delay data processing method, device and system |
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| CN104581424A (en) * | 2013-10-25 | 2015-04-29 | 华为技术有限公司 | Method, related equipment and system for streaming media transmission |
| CN104581424B (en) * | 2013-10-25 | 2018-11-30 | 华为技术有限公司 | A kind of flow-medium transmission method, relevant device and system |
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