WO2011017822A1 - e-MBMS系统中业务量修剪方法及实现该方法的BM-SC - Google Patents
e-MBMS系统中业务量修剪方法及实现该方法的BM-SC Download PDFInfo
- Publication number
- WO2011017822A1 WO2011017822A1 PCT/CN2009/000919 CN2009000919W WO2011017822A1 WO 2011017822 A1 WO2011017822 A1 WO 2011017822A1 CN 2009000919 W CN2009000919 W CN 2009000919W WO 2011017822 A1 WO2011017822 A1 WO 2011017822A1
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- WO
- WIPO (PCT)
- Prior art keywords
- service
- multiplexing
- abbr
- data
- multiplexed
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/1881—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast with schedule organisation, e.g. priority, sequence management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/18—Service support devices; Network management devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/40—Connection management for selective distribution or broadcast
Definitions
- the present invention relates to the field of mobile communications, and in particular to packet scheduling and traffic trimming in an evolved multimedia broadcast multicast service system (e-MBMS) that utilizes aggregate bit rate (ABBR) for statistical multiplexing.
- e-MBMS evolved multimedia broadcast multicast service system
- ABBR aggregate bit rate
- MBMS/e-MBMS refers to a point-to-multipoint service in which a data source sends data to multiple users to share network resources.
- the MBMS/e-MBMS defined by 3GPP can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service multicast and broadcast, which undoubtedly conforms to the trend of future mobile data development.
- e-MBMS For e-MBMS, in order to facilitate broadcast multicast single frequency network (MBSFN) operations, all behaviors of the base station (eNB) should be synchronized.
- the eNB shall send all packets within a specific synchronization period. If the amount of data in the buffer is more than the allocated resources, packet discarding is inevitable.
- the problem is where and how packet drops are made during scheduling without affecting synchronous MBSFN operations and how to make the system more robust to exceptions.
- the present invention proposes a centralized packet scheduling and traffic pruning scheme, thereby eliminating the need to standardize the scheduling algorithm at each eNB.
- a method for traffic pruning in an evolved multimedia broadcast multicast service (e-MBMS) system is provided, the e-MBMS system multiplexing a service usage set bit rate (ABBR), the method includes: a broadcast multicast service center BM-SC in the e-MBMS system determines a multiplexed ABBR; and a multimedia broadcast multicast service coordination entity MCE in the e-MBMS system allocates resources according to the determined ABBR; BM- The SC determines whether the amount of data to be transmitted in the synchronization period exceeds the resource allocated in the same period; and if the judgment result is exceeded, the BM-SC discards the tail data that cannot be transmitted in the synchronization period in the multiplexing service package.
- a broadcast multicast service center BM-SC in the e-MBMS system determines a multiplexed ABBR
- MCE multimedia broadcast multicast service coordination entity
- the method further comprises: before the determining step, the BM-SC actively discards a part of the data packets in the multiplexing service.
- the part of the data packet occupies at most 1% of all data packets of the multiplexed service plus a margin.
- the margin accounts for 0.1% of all data packets of the multiplexing service.
- the base station eNB in the e-MBMS system further discards the data packet according to a predefined rule.
- the predefined rules include: discarding data packets of services in the multiplexed service in an order reverse to a transmission order of services in the multiplexed service.
- a BM-SC in an e-MBMS system adopts ABBR multiplexing for services
- the BM-SC includes: processing means for determining a multiplexed ABBR; Determining means, determining whether the amount of data to be transmitted in the synchronization period exceeds a resource allocated in the synchronization period according to the determined ABBR; and outputting the stream shaping means configured to discard the multiplexing when the judgment result is exceeded A tail packet that cannot be sent in this synchronization cycle in a service.
- the BM-SC is configured to: firstly discard a portion of the data packets in the multiplexing service by the output data stream forming device, and then determine by the determining device.
- the part of the data packet occupies at most 1% of all data packets of the multiplexed service plus a margin.
- the margin accounts for 0.1% of all data packets of the multiplexing service.
- an e-MBMS system including the above BM-SC is provided.
- the e-MBMS system further includes a base station eNB, and the eNB is based on a predefined Rules to further drop packets.
- the predefined rules include: discarding data packets of services in the multiplexing service in an order reverse to a transmission order of services in the multiplexing service.
- Figure 1 shows a schematic diagram of an e-MBMS system.
- Figure 2 shows the statistical characteristics of the CBR service.
- FIG. 3 shows a flow diagram of a traffic pruning method incorporating active packet dropping and passive packet dropping in accordance with an embodiment of the present invention.
- FIG. 4 is a block diagram showing the structure of a BM-SC according to an embodiment of the present invention. Detailed Description of the Invention ABBR Reuse Introduction
- e-MBMS deductive multimedia broadcast multicast service
- ABBR aggregate bit rate
- multiple e-MBMS services share the same ABBR.
- Each e-MBMS service potentially utilizes the entire ABBR.
- the e-MBMS service sharing ABBR constitutes an ABBR group (bundle).
- Figure 1 shows a schematic diagram of an e-MBMS system.
- the e-MBMS system 100 shown in FIG. 1 includes one or more encoders 101-1, 10, ..., 101-n, Broadcast Multicast Service Center (BM-SC) 105, Gateway (GW) 110, MBMS Coordination Entity (MCE) 115, and one or more base stations (eNBs) 120.
- BM-SC Broadcast Multicast Service Center
- GW Gateway
- MCE MBMS Coordination Entity
- eNBs base stations
- the MCE 115 and the eNB 120 may be in a Radio Access Network (RAN).
- RAN Radio Access Network
- the encoders 101-1, 101-2, ..., 101-n receive content from the content provider server, encode it, and provide the encoded content to the BM-SC 105.
- the BM-SC 105 receives and transmits the encoded e-MBMS content.
- the BM-SC 105 performs the configuration of statistical multiplexing because the BM-SC 105 can know information about the service combination. For example, in the case of mobile television, the BM-SC 105 can know information about the desired combination of television channels. For example, the BM-SC 105 can know the service area and can know and possibly control the statistical characteristics of the user traffic stream, such as whether the code is a constant bit rate (CBR) or a variable bit rate (VBR), and whether the encoder is MPEG4 or H.264.
- CBR constant bit rate
- VBR variable bit rate
- the BM-SC 105 can be configured to obtain statistical parameters of the service to obtain information about the service combination; and can reuse the service accordingly. Specifically, the BM-SC 105 can set the ABBR for service multiplexing according to the acquired service parameters.
- the BM-SC 105 can also be configured for rate control coordination between application encoders for streaming traffic so that the encoder can generate VBR traffic, but the aggregate bit rate can be kept constant.
- the GW 110 establishes an EPS bearer of the service, and transmits related information of the ABBR group to the MCE 115.
- the MCE 115 allocates resources according to the ABBR information transmitted from the GW 110, and implements multiplexing between different services in the same ABBR group, gp , sharing resources with different businesses. Based on the allocated resources, the eNB 120 ultimately provides the services of interest to the user to the user equipment (UE) (not shown).
- UE user equipment
- the services belonging to the same ABBR group share the resources assigned to the group. According to the resource allocation scheme based on the ABBR group, different services are scheduled, g[], for multiplexing. Packet drop
- a considerable multiplex gain can be achieved by the above multiplexing mechanism.
- the bit rate of the multiplexing service is still variable.
- multiplexing is performed within the multicast channel (MCH), while resources are typically allocated to the MCH. Therefore, the multiplexed bit rate may still exceed the allocated bandwidth. Therefore, some numbers need to be discarded in a specific synchronization cycle. According to the package. Therefore, the passive packet discarding function is required.
- bit rate of the CBR service based on real-time statistics also varies, although this change is much smoother than the VBR service. Therefore, active packet discarding is also required.
- the BM-SC Since discarding more data is not a good choice, it is assumed here that up to 1% of packets can be dropped during transmission. According to the above discussion, it is necessary to discard the function, and the problem is where to implement the function. Since the traffic is transmitted from the BM-SC and the MBMS function such as the SYNC entity is provided at the BM-SC, the BM-SC is a suitable place to shape the traffic. As you can see from Figure 2, you only need to discard 1% of the packets at most.
- passive packet dropping is performed in the BM-SC.
- the BM-SC determines the service multiplexed ABBR and monitors the traffic; the MCE allocates resources according to the required ABBR, and when the traffic exceeds the allocated resources, the BM-SC discards some data packets.
- active packet dropping is also performed in the BM-SC.
- the BM-SC actively discards a portion of the data packets in the multiplexed service. This discarding considers, for example, the allocated resources, and also considers the latency requirements for data transmission (eg, packets that are delayed by more than 1 second are discarded). Through simulation, the percentage of discards can be 1%.
- a margin can be set on a 1% basis, that is, a packet of 1% + ⁇ is discarded. For example, the margin ⁇ can be 0.1%.
- FIG. 3 shows a flow chart of a traffic pruning method combining passive packet discarding and active packet discarding according to an embodiment of the present invention.
- ABR average bit rate
- step 304 the BM-SC shapes (actively discards) the output data stream by discarding the 1% + - fixed amount ⁇ packet. Where ⁇ is, for example, 0.1%.
- step 305 it is determined whether the amount of data to be transmitted is greater than the resource allocated in the synchronization period. If YES, then in step 306, the tail data packet that cannot be sent in the synchronization period is discarded (passive drop), and then proceeds to step 307, where the data packet is sent; otherwise, the process proceeds directly to the step 307.
- FIG. 4 is a block diagram showing the structure of a BM-SC according to an embodiment of the present invention.
- the BM-SC 400 includes: a processing device 405, which can be used to calculate an ABR, and configure an ABBR according to the above (refer to steps 301 to 303 above), and can also be used to perform various components in the BM-SC.
- a processing device 405 which can be used to calculate an ABR, and configure an ABBR according to the above (refer to steps 301 to 303 above), and can also be used to perform various components in the BM-SC.
- the buffer 410 is configured to receive and temporarily store the data received from the encoder; and the determining means 415 determines, according to the data stored in the buffer 410, Whether the amount of data transmitted during the synchronization period exceeds the resources allocated by the MCE according to the determined ABBR in the synchronization period; and the output stream shaping means 401 is configured to discard the multiplexing service when the judgment result is exceeded The tail packet sent during this synchronization cycle.
- the BM-SC 400 can also be configured to: first, a portion of the data packets in the multiplexed service are actively discarded by the output data stream shaping device 401, and then judged by the determining device 415.
- the traffic is shaped in the upstream node BM-SC of the eNB, so the eNB does not need a complicated distributed discarding function.
- the packet discarding algorithm in BM-SC is not ideal or MCE wants to save as much resources as possible, sometimes a few packets cannot occur. The situation of sending. Although this is rare, considering the robustness of the system, these anomalies need to be addressed.
- the eNB For these anomalies, the easiest way is for the eNB to discard packets of a particular service according to predefined rules. For example, such a rule can be: Always discard the last service in the transmission sequence, which has enough data to discard. Because this happens very rarely, it does not affect the QoS of the last service. More generally, in an abnormal situation, the data packets of the service are discarded in the reverse order of the transmission order. In this way, only after all the packets that sacrifice the service (that is, the traffic of the dropped packet) are discarded, will other services be affected.
- the embodiments described above are for illustrative purposes only and are not intended to limit the scope of the invention. It will be apparent to those skilled in the art that various modifications and changes in the form and details may be made without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims and their equivalents.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Mobile Radio Communication Systems (AREA)
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020127006146A KR20120043083A (ko) | 2009-08-11 | 2009-08-11 | E?mbms 시스템에서 트래픽을 트리밍하기 위한 방법 및 방법을 구현하기 위한 bm?sc |
US13/389,693 US20120140693A1 (en) | 2009-08-11 | 2009-08-11 | Method of trimming traffic in an e-mbms system and bm-sc for implementing the method |
CN2009801587532A CN102396256A (zh) | 2009-08-11 | 2009-08-11 | e-MBMS系统中业务量修剪方法及实现该方法的BM-SC |
BR112012002895A BR112012002895A2 (pt) | 2009-08-11 | 2009-08-11 | método de adaptar tráfego em um sistema e-mbms e bm-sc para implementar o método |
JP2012524072A JP2013502100A (ja) | 2009-08-11 | 2009-08-11 | e−MBMSシステム内でトラフィックをトリミングする方法およびその方法を実施するBM−SC |
RU2012108583/07A RU2490824C1 (ru) | 2009-08-11 | 2009-08-11 | СПОСОБ СОКРАЩЕНИЯ ТРАФИКА В СИСТЕМЕ e-MBMS И ЦЕНТР BM-SC ДЛЯ ОСУЩЕСТВЛЕНИЯ УПОМЯНУТОГО СПОСОБА |
EP09848152A EP2466948A1 (en) | 2009-08-11 | 2009-08-11 | Method for trimming traffic in e-mbms system and bm-sc for implementing method |
PCT/CN2009/000919 WO2011017822A1 (zh) | 2009-08-11 | 2009-08-11 | e-MBMS系统中业务量修剪方法及实现该方法的BM-SC |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2009/000919 WO2011017822A1 (zh) | 2009-08-11 | 2009-08-11 | e-MBMS系统中业务量修剪方法及实现该方法的BM-SC |
Publications (1)
Publication Number | Publication Date |
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WO2011017822A1 true WO2011017822A1 (zh) | 2011-02-17 |
Family
ID=43585831
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/CN2009/000919 WO2011017822A1 (zh) | 2009-08-11 | 2009-08-11 | e-MBMS系统中业务量修剪方法及实现该方法的BM-SC |
Country Status (8)
Country | Link |
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US (1) | US20120140693A1 (zh) |
EP (1) | EP2466948A1 (zh) |
JP (1) | JP2013502100A (zh) |
KR (1) | KR20120043083A (zh) |
CN (1) | CN102396256A (zh) |
BR (1) | BR112012002895A2 (zh) |
RU (1) | RU2490824C1 (zh) |
WO (1) | WO2011017822A1 (zh) |
Families Citing this family (4)
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KR20130135320A (ko) * | 2004-08-24 | 2013-12-10 | 셀라 세미컨덕터 엔지니어링 라보라토리스 리미티드 | 워크피스를 밀링하기 위해 이온빔을 지향시키고 다수회 편향시키고, 그 정도를 결정 및 제어하기 위한 방법 |
US9519490B2 (en) * | 2013-03-07 | 2016-12-13 | Microsoft Technology Licensing, Llc | Adaptive data synchronization |
KR101521969B1 (ko) * | 2013-04-23 | 2015-05-20 | 주식회사 케이티 | 브로드캐스트 멀티캐스트 서비스를 제공하는 분리된 장치 및 방법 |
CN113015107B (zh) * | 2019-12-20 | 2024-03-22 | 北京新岸线移动通信技术有限公司 | 一种无线通信系统的业务保障优化方法及装置 |
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2009
- 2009-08-11 BR BR112012002895A patent/BR112012002895A2/pt not_active IP Right Cessation
- 2009-08-11 EP EP09848152A patent/EP2466948A1/en not_active Withdrawn
- 2009-08-11 KR KR1020127006146A patent/KR20120043083A/ko not_active Application Discontinuation
- 2009-08-11 RU RU2012108583/07A patent/RU2490824C1/ru not_active IP Right Cessation
- 2009-08-11 WO PCT/CN2009/000919 patent/WO2011017822A1/zh active Application Filing
- 2009-08-11 CN CN2009801587532A patent/CN102396256A/zh active Pending
- 2009-08-11 US US13/389,693 patent/US20120140693A1/en not_active Abandoned
- 2009-08-11 JP JP2012524072A patent/JP2013502100A/ja not_active Ceased
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Also Published As
Publication number | Publication date |
---|---|
EP2466948A1 (en) | 2012-06-20 |
RU2490824C1 (ru) | 2013-08-20 |
KR20120043083A (ko) | 2012-05-03 |
US20120140693A1 (en) | 2012-06-07 |
JP2013502100A (ja) | 2013-01-17 |
BR112012002895A2 (pt) | 2017-08-08 |
CN102396256A (zh) | 2012-03-28 |
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