CN101964945B - Method and system for retransmitting enhanced multimedia broadcast multicast service (E-MBMS) - Google Patents
Method and system for retransmitting enhanced multimedia broadcast multicast service (E-MBMS) Download PDFInfo
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- CN101964945B CN101964945B CN200910157635.1A CN200910157635A CN101964945B CN 101964945 B CN101964945 B CN 101964945B CN 200910157635 A CN200910157635 A CN 200910157635A CN 101964945 B CN101964945 B CN 101964945B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0017—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy where the mode-switching is based on Quality of Service requirement
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1825—Adaptation of specific ARQ protocol parameters according to transmission conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1874—Buffer management
- H04L1/1877—Buffer management for semi-reliable protocols, e.g. for less sensitive applications like streaming video
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
- H04L2001/0093—Point-to-multipoint
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Multimedia (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method and a system for retransmitting E-MBMS (enhanced multimedia broadcast multicast service). The retransmitting method comprises that: a BS (base station) divides all UTs (user terminals) belonging to the BS into different user groups according to the QoS (quality of service) priority of the UTs, and sets retransmission strategies for the different user groups; after receiving the retransmission request of one or more UTs in a user group, the BS transmits the QoS priority, retransmission strategies and retransmission data of the user group; and the UTs receives the retransmission data according to the received QoS priority and the received retransmission strategies. The method and the system reduce the time delay of control signaling return in a system as much as possible, and further improve the E-MBMS retransmission efficiency under the condition of reducing the waiting time of other UTs or user groups and on the premise of ensuring certain fairness.
Description
Technical field
The present invention relates to wireless communication field, relates in particular to repeating method and the system of a kind of enhanced multimedia broadcast multicast services (Enhanced Multimedia Broadcast Multicast Service, E-MBMS).
Background technology
In follow-on broadband wireless communication network, there is many new mobile multi-media services of releasing recently and traditional broadcasting service, for example, by the sport information business of broadcast, television transmission match collection of choice specimens video clip, cellphone subscriber, by specific television program designing program, intercepts programme content etc. from existing television channel.Because mobile network's frequency spectrum is a kind of resource of finite sum costliness, so in the time that numerous recipients of same server use same mobile link, very easily cause bottleneck.Therefore, enhanced multimedia broadcast multicast services (E-MBMS) is also just arisen at the historic moment.
When there being base station (Base Station in E-MBMS, BS) with user terminal (User Terminal, UT) when interaction, download etc. are served, may relate to the re-transmission of data or signaling, now, control signal round-trip delay in how reduction system, and then the stand-by period of reducing other UT, improving retransmission efficiency, is the challenge of the wireless communication system to having E-MBMS service.
Summary of the invention
The technical problem to be solved in the present invention proposes a kind of repeating method of enhanced multimedia broadcast multicast services, can improve the retransmission efficiency of E-MBMS.
In order to solve the problems of the technologies described above, the invention provides a kind of repeating method of enhanced multimedia broadcast multicast services, comprising:
Base station BS is divided into different customer groups according to the service quality QoS priority of user terminal UT by the UT of all these BS of ownership, and for different customer groups, re-transmission policy is set;
Described BS receives after the repeat requests of one or more UT in customer group, sends the data of QoS priority, re-transmission policy and the re-transmission of described customer group;
Described UT receives according to receiving QoS priority and re-transmission policy the data that retransmit.
Further, above-mentioned repeating method also can have following characteristics:
Before described BS is divided into the step of different customer groups according to the QoS priority of UT by all UT, described BS is different types by delineation of activities, and the setting QoS priority corresponding with type of service.
Further, above-mentioned repeating method also can have following characteristics:
Described BS sends the data of QoS priority, re-transmission policy and the re-transmission of described customer group, specifically comprises:
Described BS is according to the QoS priority flag QoS type son field of customer group under the UT of initiation repeat requests;
Described BS specifies son field according to re-transmission policy mark re-transmission policy corresponding to the QoS priority of customer group under the UT of initiation repeat requests;
Described BS transmission repeat requests arranges the data of field and re-transmission, and wherein, described repeat requests arranges field and comprises QoS type son field and re-transmission policy appointment son field.
Further, above-mentioned repeating method also can have following characteristics:
Described BS sends the data that retransmit according to described re-transmission policy.
Further, above-mentioned repeating method also can have following characteristics:
Described UT receives according to receiving QoS priority and re-transmission policy the data that retransmit, and specifically refers to:
If described UT matches with the QoS type son field receiving, described UT specifies the re-transmission policy of son field instruction to receive the data that retransmit according to re-transmission policy;
If described UT does not match with the QoS type son field receiving, described UT waits within the time retransmitting.
In order to solve the problems of the technologies described above, the present invention also provides a kind of retransmission system of enhanced multimedia broadcast multicast services, comprises the UT of BS and the described BS of ownership, it is characterized in that,
Described BS is used for, according to the QoS priority of UT, the UT of all these BS of ownership is divided into different customer groups, and for different customer groups, re-transmission policy is set; And, for when receiving after the repeat requests of the one or more UT of customer group, send the data of QoS priority, re-transmission policy and the re-transmission of described customer group;
Described UT is used for sending after repeat requests, receives according to receive QoS priority and re-transmission policy from BS the data that retransmit.
Further, above-mentioned retransmission system also can have following characteristics:
It is different types that described BS is further used for delineation of activities, and the setting QoS priority corresponding with type of service.
Further, above-mentioned retransmission system also can have following characteristics:
Described BS is further used for according to the QoS priority flag QoS type son field of customer group under the UT of initiation repeat requests; For specifying son field according to re-transmission policy mark re-transmission policy corresponding to the QoS priority of customer group under the UT of initiation repeat requests; And, the data of field and re-transmission are set for sending repeat requests, wherein, described repeat requests arranges field and comprises that QoS type son field and re-transmission policy specify son field.
Further, above-mentioned retransmission system also can have following characteristics:
Described BS is further used for sending according to described re-transmission policy the data that retransmit.
Further, above-mentioned retransmission system also can have following characteristics:
Described UT is further used for, in the time that the priority of self matches with the QoS type son field receiving, specifying the re-transmission policy of son field instruction to receive the data that retransmit according to re-transmission policy; In the time that the priority of self does not match with the QoS type son field receiving, within the time retransmitting, wait for.
The present invention has following beneficial effect: according to service quality (Quality of Service, QoS) priority, UT is classified as to different customer groups, adopts different re-transmission policies for the UT under different classifications or customer group.By defining different QoS priority, realize the differentiation of different business is treated, control signal round-trip delay in reduction system as far as possible, and then reduce in the situation of stand-by period of other UT or customer group, ensureing, under the prerequisite of certain fairness, to improve E-MBMS retransmission efficiency.
Wherein, all UT in cordless communication network are classified in arranging of customer group, when re-transmission, only process meeting all UT that retransmit in the customer group requiring, and have reduced signaling consumption and round-trip delay;
Repeat requests arranges field different QoS types is provided with to different re-transmission policies, and arrange between BS and UT, BS sends data according to the specified re-transmission policy of QoS type, and UT receives the data that retransmit according to the re-transmission policy of constraint, has improved greatly the efficiency retransmitting.
Brief description of the drawings
Fig. 1 is the cordless communication network E-MBMS repeating method flow chart of the embodiment of the present invention;
Fig. 2 is the structure chart that the repeat requests of the E-MBMS re-transmission of the embodiment of the present invention arranges field.
Embodiment
In the present invention, BS is divided into different customer groups according to the QoS priority of UT by the UT of all these BS of ownership, and for different customer groups, re-transmission policy is set; BS receives after the repeat requests of one or more UT in customer group, sends the data of QoS priority, re-transmission policy and the re-transmission of described customer group; Described UT receives according to receiving QoS priority and re-transmission policy the data that retransmit.
Wherein, BS sends data according to the specified re-transmission policy of QoS type, and UT receives the data that retransmit according to re-transmission policy, improved the retransmission efficiency of E-MBMS.
Below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
As shown in Figure 1, the repeating method of embodiment of the present invention E-MBMS comprises the steps:
S101, BS determines QoS priority number;
BS can, according to system requirements, arrange the different priority corresponding from business, for example, all business is divided into five kinds, real-time polling service, non-real-time polling service and the Best-Effort service of unsolicited grant service, real-time polling service, expansion;
S102, BS is divided into different customer groups according to the QoS priority of UT by all UT;
The object of this step is that UT is distinguished according to QoS priority, in the time having repeat requests, only all UT in customer group in corresponding QoS priority are processed, and the UT of other QoS priority waits within the time retransmitting;
S103, BS is that different customer groups arranges re-transmission policy;
The object of this step is that the different corresponding re-transmissions of QoS priority is taked to different re-transmission modes, reduce the mutual and round-trip delay of signaling, for example, for Best-Effort service, in order to ensure its service quality, when re-transmission, all UT in the corresponding customer group of the guaranteed qos priority of need to trying one's best can both correctly receive the data of re-transmission, now, the number of retransmission that may need or mixed automatic retransfer request (Hybrid Automatic Repeat Request, HARQ) process number can be more, for example, 5 times, what need for unsolicited grant service is less, for example, 1 time.Certainly, in re-transmission policy, can also comprise other the content relevant to re-transmission, and be not limited to specified content herein;
S104, BS arranges repeat requests field is set, and this field comprises: QoS type son field, re-transmission policy are specified son field;
The structure that repeat requests arranges field as shown in Figure 2, wherein, the effect of QoS type son field is the data of indicating all UT in the customer group matching with QoS type son field to retransmit according to the content reception of re-transmission policy appointment, and other QoS type is not processed; It is to start data retransmission according to predetermined re-transmission policy of arranging between BS and UT that re-transmission policy is specified the effect of son field, and UT receives data according to this strategy;
S105, BS receives the repeat requests of UT or customer group;
Wherein, the repeat requests of described customer group refers to: the repeat requests that multiple UT of this customer group initiate;
S106, BS determines QoS type son field according to initiating the UT of repeat requests or the QoS priority of customer group;
S107, BS is according to predetermined re-transmission policy, and mark re-transmission policy is specified son field;
S108, BS transmission repeat requests arranges the data of field and re-transmission;
Wherein, BS uses the mode of broadcast, and transmission repeat requests arranges the data of field and re-transmission;
S109, UT receives repeat requests and field is set and receives the data that retransmit according to re-transmission policy.
In this step, if described UT matches with the QoS type son field receiving, described UT specifies the re-transmission policy of son field instruction to receive the data that retransmit according to re-transmission policy;
If described UT does not match with the QoS type son field receiving, described UT waits within the time retransmitting.
The retransmission system of the E-MBMS of the embodiment of the present invention, comprises BS and the UT that belongs to described BS,
Wherein, described BS is used for, according to the QoS priority of UT, the UT of all these BS of ownership is divided into different customer groups, and for different customer groups, re-transmission policy is set; And, for when receiving after the repeat requests of the one or more UT of customer group, send the data of QoS priority, re-transmission policy and the re-transmission of described customer group;
Described UT is used for sending after repeat requests, receives according to receive QoS priority and re-transmission policy from BS the data that retransmit.
It is different types that described BS is further used for delineation of activities, and the setting QoS priority corresponding with type of service.
Described BS is further used for according to the QoS priority flag QoS type son field of customer group under the UT of initiation repeat requests; For specifying son field according to re-transmission policy mark re-transmission policy corresponding to the QoS priority of customer group under the UT of initiation repeat requests; And, the data of field and re-transmission are set for sending repeat requests, wherein, described repeat requests arranges field and comprises that QoS type son field and re-transmission policy specify son field.
Described BS is further used for sending according to described re-transmission policy the data that retransmit.
Described UT is further used for, in the time that the priority of self matches with the QoS type son field receiving, specifying the re-transmission policy of son field instruction to receive the data that retransmit according to re-transmission policy; In the time that the priority of self does not match with the QoS type son field receiving, within the time retransmitting, wait for.
Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (6)
1. a repeating method for enhanced multimedia broadcast multicast services, comprising:
Base station BS is divided into different customer groups according to the service quality QoS priority of user terminal UT by the UT of all these BS of ownership, and for different customer groups, re-transmission policy is set;
Described BS receives after the repeat requests of one or more UT in customer group, sends the data of QoS priority, re-transmission policy and the re-transmission of described customer group; Described BS sends the data of QoS priority, re-transmission policy and the re-transmission of described customer group, specifically comprises: described BS is according to the QoS priority flag QoS type son field of customer group under the UT of initiation repeat requests; Described BS specifies son field according to re-transmission policy mark re-transmission policy corresponding to the QoS priority of customer group under the UT of initiation repeat requests; Described BS transmission repeat requests arranges the data of field and re-transmission, and wherein, described repeat requests arranges field and comprises QoS type son field and re-transmission policy appointment son field;
Described UT receives according to receiving QoS priority and re-transmission policy the data that retransmit, and specifically refers to: if described UT matches with the QoS type son field receiving, described UT specifies the re-transmission policy of son field instruction to receive the data that retransmit according to re-transmission policy; If described UT does not match with the QoS type son field receiving, described UT waits within the time retransmitting.
2. repeating method as claimed in claim 1, is characterized in that,
Before described BS is divided into the step of different customer groups according to the QoS priority of UT by all UT, described BS is different types by delineation of activities, and the setting QoS priority corresponding with type of service.
3. repeating method as claimed in claim 1 or 2, is characterized in that,
Described BS sends the data that retransmit according to described re-transmission policy.
4. a retransmission system for enhanced multimedia broadcast multicast services, comprises BS and the UT that belongs to described BS, it is characterized in that,
Described BS is used for, according to the QoS priority of UT, the UT of all these BS of ownership is divided into different customer groups, and for different customer groups, re-transmission policy is set; And, for when receiving after the repeat requests of the one or more UT of customer group, send the data of QoS priority, re-transmission policy and the re-transmission of described customer group; Described BS is further used for according to the QoS priority flag QoS type son field of customer group under the UT of initiation repeat requests; For specifying son field according to re-transmission policy mark re-transmission policy corresponding to the QoS priority of customer group under the UT of initiation repeat requests; And, the data of field and re-transmission are set for sending repeat requests, wherein, described repeat requests arranges field and comprises that QoS type son field and re-transmission policy specify son field;
Described UT is used for sending after repeat requests, receives according to receive QoS priority and re-transmission policy from BS the data that retransmit; Described UT is further used for, in the time that the priority of self matches with the QoS type son field receiving, specifying the re-transmission policy of son field instruction to receive the data that retransmit according to re-transmission policy; In the time that the priority of self does not match with the QoS type son field receiving, within the time retransmitting, wait for.
5. retransmission system as claimed in claim 4, is characterized in that,
It is different types that described BS is further used for delineation of activities, and the setting QoS priority corresponding with type of service.
6. the retransmission system as described in claim 4 or 5, is characterized in that,
Described BS is further used for sending according to described re-transmission policy the data that retransmit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN200910157635.1A CN101964945B (en) | 2009-07-21 | 2009-07-21 | Method and system for retransmitting enhanced multimedia broadcast multicast service (E-MBMS) |
| PCT/CN2009/075221 WO2011009254A1 (en) | 2009-07-21 | 2009-11-30 | Retransmission method and system for enhanced multimeia broadcast multicast service |
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| CN200910157635.1A CN101964945B (en) | 2009-07-21 | 2009-07-21 | Method and system for retransmitting enhanced multimedia broadcast multicast service (E-MBMS) |
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| CN101964945A CN101964945A (en) | 2011-02-02 |
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| CN1780255A (en) * | 2004-11-24 | 2006-05-31 | 大唐移动通信设备有限公司 | Wireless data transmission with nonuniform protection |
| CN101141158A (en) * | 2007-03-13 | 2008-03-12 | 中兴通讯股份有限公司 | Service types based power distribution method on reverse link power control channel |
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| KR20080018148A (en) * | 2006-08-23 | 2008-02-27 | 한국전자통신연구원 | Mbms data transmission and receiving in packet based on cellular system |
| KR20080052042A (en) * | 2006-12-07 | 2008-06-11 | 삼성전자주식회사 | Method and apparatus for multicasting data |
| KR20080086384A (en) * | 2007-03-21 | 2008-09-25 | 한국전자통신연구원 | Mbms data transmission and receiving in packet based on mobile communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1780255A (en) * | 2004-11-24 | 2006-05-31 | 大唐移动通信设备有限公司 | Wireless data transmission with nonuniform protection |
| CN101141158A (en) * | 2007-03-13 | 2008-03-12 | 中兴通讯股份有限公司 | Service types based power distribution method on reverse link power control channel |
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| CN101964945A (en) | 2011-02-02 |
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