WO2010101449A2 - 멀티캐스트 및 브로드캐스트 서비스 시스템 및 방법 - Google Patents
멀티캐스트 및 브로드캐스트 서비스 시스템 및 방법 Download PDFInfo
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- WO2010101449A2 WO2010101449A2 PCT/KR2010/001441 KR2010001441W WO2010101449A2 WO 2010101449 A2 WO2010101449 A2 WO 2010101449A2 KR 2010001441 W KR2010001441 W KR 2010001441W WO 2010101449 A2 WO2010101449 A2 WO 2010101449A2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
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- 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
- H04W28/04—Error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
Definitions
- the present invention relates to a multicast and broadcast service (MCBCS) system and method, and more particularly, to support macro diversity using a synchronization rule in a wireless communication environment.
- MCBCS multicast and broadcast service
- Wireless communication systems are being developed to provide various services such as broadcasting, multimedia video, and multimedia messages.
- active research is being conducted to stably provide users with services of various QoS (Quality of Service) at high speed.
- QoS Quality of Service
- research is being actively conducted to ensure mobility and QoS and to provide high-speed services reliably in the next generation wireless communication system
- the representative communication system is IEEE (Institute of Electrical and Electronics Engineers) 802.16 standard / A portable Internet system or a WiMAX system based on the WiMAX (Worldwide Interoperability for Microwave Access) specification.
- the present invention has been made in accordance with the above-described needs, and an object of the present invention is to provide a multicast and broadcast service system and method capable of implementing macro diversity.
- Another object of the present invention is to include a GRE SN (Generic Routing Encapsulation Sequence Number) in the MBS synchronization rule to define the scope of the application of the synchronization rule, as well as multicast and broadcast service system that can efficiently recover when data loss; To provide a way.
- GRE SN Generic Routing Encapsulation Sequence Number
- an ASN-GW Access Service Network-Gateway sets a multicast and broadcast service (MBS) synchronization rule to a BS (BS). Transmitting to a base station; Requesting recovery of an unreceived MBS synchronization rule by the ASN-GW if the BS does not receive the next MBS synchronization rule by the next MBS synchronization rule expected arrival time included in the MBS synchronization rule; And retransmitting, by the ASN-GW, the unreceived MBS synchronization rule to the BS.
- MBS multicast and broadcast service
- an ASN-GW Access Service Network-Gateway sends MBS (Multicast and Broadcast Service) data to a BS (Base Station). Transmitting; The BS detects the loss of the MBS data with reference to the Generic Routing Encapsulation (GRE) sequence number included in the MBS synchronization rule, and if the loss of the MBS data is detected, the BS recovers the lost MBS data to the ASN-GW. Requesting; And retransmitting, by the ASN-GW, the lost MBS data to the BS.
- GRE Generic Routing Encapsulation
- the ASN-GW Access Service Network-Gateway receives the MCBCS data packet from the MCBCS server / controller for a predetermined period Accumulating;
- the ASN-GW assigning a Generic Routing Encapsulation (GRE) Sequence Number (MCS) to MCBCS data packets to configure Multicast and Broadcast Service (MBS) synchronization rules and transmitting them to a base station (BS);
- GRE Generic Routing Encapsulation
- MCS Generic Routing Encapsulation
- MCS Generic Routing Encapsulation
- MCS Generic Routing Encapsulation
- MCS Generic Routing Encapsulation
- MCS Generic Routing Encapsulation
- MBS Multicast and Broadcast Service
- a multicast and broadcast service (Multicast and Broadcast Service) system of one embodiment of the present invention includes an MBS Distribution Data Path Function (MBS) Distribution Data Path Function (DPF) for receiving and distributing MBS data from an MCBCS server / controller; An MBS Synchronization Controller (MBS Synchronization Controller) for generating a MBS synchronization rule by obtaining a Generic Routing Encapsulation (GRE) Sequence Number (MB) for MBS data from the MBS Distribution DPF; An MBS Synchronization Executer which receives the MBS synchronization rule from the MBS Synchronization Control and executes MBS Synchronization; And an MBS Data Path Function (MBS DPF) for receiving MBS data from the MBS distribution DPF, packaging the MBS data into an MBS burst, and transmitting the same to a mobile station (MS).
- MBS Distribution Data Path Function MBS Synchronization Controller
- GRE Generic Routing Encapsulation
- MB Generic Routing Encapsulation
- the multicast and broadcast service system receives an MCBCS data packet, distributes the MCBCS data packet to the corresponding MCBCS service flow, and distributes the GRE to the MCBCS data packets.
- MCBCS Data packet MBS Distribution MBS Distribution Data Path Function (DPF) to give a Sequence Number (SN);
- An MBS Synchronization Controller MBS Synchronization Controller
- MBS Synchronization Executer that receives the MBS synchronization rule and performs MBS synchronization on the MCBCS data packets according to the MBS synchronization rule, wherein the MBS distribution DPF and the MBS synchronization controller are ASNs. It is located in -GW.
- macro diversity and multicast and broadcast services can be efficiently implemented based on the IEEE 802.16e / WiMAX standard.
- the inclusion of the GRE SN in the MBS synchronization rule not only defines the scope of application of the synchronization rule, but also has an effect of efficiently recovering it when data is lost.
- the present invention by including the data size in the MBS synchronization rule, even if the data is lost, it is possible to provide a multicast and broadcast service without being affected by the lost MBS data packet.
- FIG. 1 illustrates a configuration diagram of an MCBCS system according to a first embodiment of the present invention.
- FIG. 2 illustrates a configuration diagram of an MCBCS system according to a second embodiment of the present invention.
- FIG. 3 illustrates a configuration diagram of an MCBCS system according to a third embodiment of the present invention.
- FIG. 4 illustrates a configuration diagram of an MCBCS system according to a fourth embodiment of the present invention.
- FIG. 5 is a diagram for explaining MBS synchronization rule transmission according to the first embodiment of the present invention.
- FIG. 6 is a diagram illustrating MBS synchronization rule execution time and MBS burst scheduling according to the first embodiment of the present invention.
- FIG. 7 is a diagram illustrating an MBS synchronization rule recovery procedure according to the first embodiment of the present invention.
- FIG. 8 is a diagram illustrating an MBS data recovery procedure according to the first embodiment of the present invention.
- FIG. 9 is a diagram illustrating an MCBCS method using an MBS synchronization rule according to a second embodiment of the present invention.
- a broadcast service is a unidirectional point-to-multipoint in which data is transmitted from a single source to a plurality of MSs within a relevant broadcast service area. to-multipoint) service.
- the multicast service is a one-way point-to-multipoint service in which data is transmitted from one source to a multicast group in an associated multicast service area.
- the multicast service differs from the broadcast service in that it is provided only to users who subscribe to a predetermined multicast service and participate in a multicast group associated with the predetermined multicast service.
- An IP Multicast Group refers to a set of MSs identified by the same single IP multicast destination address.
- the IP multicast group is assigned by the MCBCS server / controller, and the multicast datagram is sent to all members of the MS group.
- a multicast and broadcast service is divided into MBS and MCBCS according to a layer, and MBS is multicast provided by MAC and PHY layers.
- MCBCS refers to multicast and broadcast service provided at a network layer or higher.
- this distinction is not strictly applied, and both MBS and MCBCS should be understood as an abbreviation for multicast and broadcast service.
- MBS zone is a collection of BS using the same Connection Identifier (CID) and Services & System Aspects (SA) for a predetermined MCBCS content transmission. Therefore, the MBS zone can be identified by a uniquely assigned MBS zone ID (MBS zone ID). For example, for downlink multicast services in the same MBS zone, the same Multicast Connection Identifier (MCID) and SA are assigned to all MSs on the same air connection.
- MBS zone may include one or more Access Service Networks (ASNs) of the same Network Access Provider (NAP), and may be shared by one or more NSPs.
- ASNs Access Service Networks
- NAP Network Access Provider
- MCBCS multicast and broadcast service
- the MCBCS system according to the present invention supports an implementation on a WiMAX network.
- FIG. 1 is a configuration diagram of an MCBCS system according to a first embodiment of the present invention.
- a network configuration of an MCBCS system may include a mobile station (MS) 100, a base station (BS) 200, an access service network-gateway (ASN-GW) 300, and a CSN ( Connectivity Service Network) 400 and the like.
- the BS 200 includes an MBS Data Path Function (MBS DPF) 210 and an MBS Synchronization Executer 220
- the ASN-GW 300 includes an MBS Distribution Data Path. Function 310 and MBS Synchronization Controller 320.
- the CSN 400 may include an MCBCS server / controller, a subscriber profile database, authentications, authorizations, and accounting (AAA), and the like.
- FIG. 2 is a configuration diagram of an MCBCS system according to a second embodiment of the present invention.
- the network configuration of the MCBCS system is a mobile station (MS) 100, a base station (BS) 200, an Access Service Network-Gateway (ASN-GW) 300, CSN ( Connectivity Service Network) 400 and the like.
- the BS 200 includes an MBS Data Path Function (MBS DPF) 210 and an MBS Lower Synchronization Executer (240), and the ASN-GW 300 includes an MBS Distribution DPF (MBS Distribution Data).
- CSN 400 includes: It may include an MCBCS Server / Controller, Subscriber Profile Database, AAA (Authentications, Authorizations, and Accounting), and the like.
- FIG. 3 is a configuration diagram of an MCBCS system according to a third embodiment of the present invention.
- the network configuration of the MCBCS system includes a mobile station (MS) 100, a base station (BS) 200, an access service network-gateway (ASN-GW) 300, and a CSN ( Connectivity Service Network) 400 and the like.
- the BS 200 includes an MBS Data Path Function (MBS DPF) 210, an MBS Upper Synchronization Executer 230, and an MBS Lower Synchronization Executer 240.
- the ASN-GW 300 includes an MBS Distribution Data Path Function (DPF) 310 and an MBS Synchronization Controller 320.
- the CSN 400 may include an MCBCS Server / Controller, Subscriber Profile Database, AAA (Authentications, Authorizations, and Accounting), and the like.
- FIG. 4 is a configuration diagram of an MCBCS system according to a fourth embodiment of the present invention.
- the network configuration of the MCBCS system includes a mobile station (MS) 100, a base station (BS) 200, a stand-alone MBS SC 250, and an access service network (ASN-GW). Gateway (300), CSN (Connectivity Service Network) 400 and the like.
- the BS 200 includes an MBS Data Path Function (MBS DPF) 210, an MBS Upper Synchronization Executer 230, and an MBS Lower Synchronization Executer 240.
- the stand-alone MBS SC 250 includes an MBS Data Path Function (MBS DPF) 260 and an MBS Synchronization Controller 270
- the ASN-GW 300 includes an MBS Distribution DPF (MBS Distribution). Data Path Function) 310.
- the CSN 400 may include an MCBCS Server / Controller, Subscriber Profile Database, AAA (Authentications, Authorizations, and Accounting), and the like.
- MCBCS Server / Controller manages IP Multicast Groups, MCBCS Program Management, MCBCS Announcement Management (including MCBCS Guided Manipulation and Distribution), MCBCS Session Management, Data Encryption ( encryption support, application layer key management, security below the application layer (e.g. SRTP, IPSec), mapping information (e.g. mapping IP addresses of MCBCS content to MCIDs assigned to MBS zones) MCBCS components of the CSN (Connectivity Service Network) are controlled by transmitting the information, the MBS zone ID to the MCBCS transmission zone, and the like.
- the AAA is responsible for MCBCS authentication, authorizations, and accounting, and the Subscriber Profile Database stores and manages subscriber profiles.
- the MBS Distribution Data Path Function is a data plane entity in the MBS zone of the NAP, and is responsible for data plane bearer management and MBS data distribution.
- the MBS Distribution DPF includes MCBCS bearer control management, MCBCS bearer traffic classification and delivery, Generic Routing Encapsulation (GRE) key and sequence including DP establishment, maintenance, and release. It manages and distributes a number (SN), supports MCBCS charging, and transmits information such as GRE SN and MCBCS data packet size to the MBS synchronization controller.
- GRE Generic Routing Encapsulation
- the MBS distribution DPF may be classified into a primary MBS distribution DPF and a serving MBS distribution DPF.
- the primary MBS deployment DPF is uniquely assigned to each MBS zone, and when it receives a session start trigger from the MBS proxy, it acts as an Internet Group Management Protocol (IGMP) client to operate the IP multicast group tree (ASN and CSN).
- IGMP Internet Group Management Protocol
- ASN and CSN IP multicast group tree
- an IGMP report message is sent to the final MR between the ASN and the CSN. It also transmits information such as GRE SN and MCBCS data packet size to the MBS synchronization controller.
- the serving MBS distribution DPF then forwards the IP multicast packet. For reference, IP forwarding may be performed by unicast or multicast in the ASN.
- the MBS Data Path Function receives MCBCS data packets from the MBS Distribution DPF, packages them into MBS bursts, and sends them to the MS.
- MBS Synchronization Controller is a control entity that creates a synchronization rule with a timestamp that supports macro diversity or downlink frame level coordination in conjunction with MBS-distributed DPFs. .
- the MBS synchronization controller transmits a synchronization rule including a time stamp to the MBS synchronization executor, and there is one MBS synchronization controller in one MBS zone.
- the MBS synchronization controller is essentially provided in the ASN-GW, and may optionally be provided in the BS belonging to the corresponding MAB zone.
- the MBS Synchronization Executer executes MBS synchronization rules sent from the MBS Synchronization Controller for data synchronization.
- the MBS synchronization executor may be implemented by dividing into an MBS Upper Synchronization Executer and an MBS Lower Synchronization Executer.
- the MBS Top Synchronizer implements the MAC PDUs according to the synchronization rules sent from the MBS Synchronization Controller and packages them into MAC bursts.
- the MBS Lower Synchronizer implements the final PHY burst according to the synchronization rules sent from the MBS Synchronization Controller.
- a final MBS subframe is configured and transmitted to the MS. Then, mapping information for mapping the MCID to the MBS zone ID is transmitted, and the MBS_MAP_IE, MBS_MAP, and MBS_DATA_IE are broadcast including the MBS zone ID and the MCID.
- Table 1 illustrates the function of WiMAX NRM reference points associated with the MCBCS system according to the present invention (see FIG. 1).
- FIG. 5 is a diagram for explaining MBS synchronization rule transmission according to the first embodiment of the present invention.
- the MBS Synchronization Controller announces the MBS Synchronization Rule by sending an MBS Sync Rule Announcement message (see step S510). ).
- the MBS synchronization controller directly sends the MBS synchronization rule notification message to the unicast IP address (unicast IP address) of the MBS synchronization executor. And, if the multicast infrastructure (multicast infrastructure), the MBS synchronization controller transmits the MBS synchronization rule notification message to the multicast IP address (multicast IP address) allocated for the distribution of synchronization rules in the MBS zone.
- some parameters of the synchronization rule may be implemented to be preconfigured in the MBS synchronization executor.
- FIG. 6 is a diagram illustrating MBS synchronization rule execution time and MBS burst scheduling according to the first embodiment of the present invention.
- the MBS synchronization rule notification message includes the expected time of arrival of the next MBS synchronization rule, which is represented by the 'Next Sync Rule expected TOA TLV'.
- the MBS burst is transmitted through an air frame indicated by the MBS Burst Offset TLV based on the MBS synchronization rule expected arrival time.
- the time interval between the synchronization rule expected arrival time and the transmission time of the first MBS burst shown in the synchronization rule should be sufficient to recover the synchronization rule if the synchronization rule is not normally received.
- a particular MBS burst may be repeatedly scheduled at a predetermined period, and a plurality of MBS bursts may be defined in the same MBS synchronization rule.
- the MBS synchronization rule may include parameters for transmitting one or more MBS bursts.
- the MBS burst size and position are defined in the MBS MAP IE using, for example, an OFDMA subchannel offset, an OFDMA symbol offset, an OFDMA subchannel number, an OFDMA symbol number, and the like.
- 'Macro diversity enhanced field' is set to 0 in the MBS MAP IE.
- Data buffers of the MBS DPF / MBS synchronization executor are indicated by the MBS zone ID / MCID pair or the R6 data path tunnel ID.
- the MBS synchronization controller may omit these TLVs in subsequent MBS synchronization rule announcement messages.
- the TLV identifying the synchronization rule is an exception, which is included in every MBS synchronization rule notification message.
- Parameters for identifying a synchronization rule include a synchronization rule GPS timestamp and an MBS zone ID.
- Table 2 illustrates the format of the MBS synchronization rule notification message transmitted from the MBS synchronization controller to the MBS synchronization executor.
- FIG. 6 is a diagram illustrating an MBS synchronization rule recovery procedure according to an embodiment of the present invention.
- the MBS synchronization executor may know the arrival time of the next MBS synchronization rule by using next synchronization rule expected arrival time information (eg, Next Sync Rule expected TOA TLV) included in the current MBS synchronization rule.
- next synchronization rule expected arrival time information eg, Next Sync Rule expected TOA TLV
- the MBS Synchronizer executor uses a timer to track the expected arrival time of the next MBS synchronization rule, and if the MBS Synchronizer executor does not receive the next synchronization rule by the expected arrival time, the MBS Synchronizer executor indicates that the MBS synchronization rule is lost.
- the MBS Sync Rule Recovery Request message is transmitted to the MBS synchronization controller (see step S710).
- the MBS synchronization rule recovery request message includes a synchronization rule GPS timestamp indicating the lost MBS synchronization rule.
- the MBS synchronization controller finds the MBS synchronization rule requested by the MBS synchronization executor by referring to the synchronization rule GPS timestamp, and retransmits the MBS synchronization rule notification message including the requested synchronization rule to the MBS synchronization executor (see step S720). .
- Table 3 illustrates the format of the MBS synchronization rule recovery request message transmitted from the MBS synchronization executor to the MBS synchronization controller.
- FIG. 8 is a diagram illustrating an MBS data recovery procedure according to an embodiment of the present invention.
- the MBS DPF detects a loss of a service data unit (SDU) by referring to a GRE sequence number of packets received through the MBS data path. If the MBS DPF detects the loss of the SDU, the MBS DPF starts the data recovery procedure by sending an MBS Data Recovery Request message to the MBS distribution DPF (see step S810).
- the MBS data recovery mechanism may be negotiated in the process of establishing the MBS data path.
- the MBS Distribution DPF then sends an MBS Data Recovery Response message to the MBS DPF indicating the size of the lost SDU (see step S820).
- step S820 may be omitted, which may be negotiated during data path establishment.
- the MBS distribution DPF then retransmits the lost packet to the MBS DPF with reference to the GRE SN (see step S830).
- Table 4 below illustrates the format of the MBS data recovery request message
- Table 5 below illustrates the format of the MBS data recovery response message
- two timers are used for the synchronization rule transmission and recovery procedure.
- the first timer T MBS_Sync_Rule_Recovery_Request is started when the MBS synchronization executor transmits the MBS synchronization rule recovery request message, and stops when the MBS synchronization rule notification message is received from the MBS synchronization controller.
- the second timer T MBS_Data_Recovery_Request is started when the MBS DPF sends the MBS data recovery request message and ends when the MBS data recovery response message receives the MBS data recovery response message or the lost packet.
- the maximum timer value of the first timer and the second timer is preset to an appropriate value. If the timer exceeds the preset maximum value, the timer is reset and transmission of the recovery request message is repeated. When the transmission of the repair request message is repeated to reach the maximum number of retry, the MBS synchronization executor and the MBS DPF operate as follows.
- the MBS synchronization executor discards the previously received MBS data until the next MBS synchronization rule is successfully received.
- the MBS DPF discards the entire MBS data for the MBS frame or uses the MBS SDU packet size included in the received MBS synchronization rule notification message for lost packet recovery. Assigns an air resource and transmits an MBS frame.
- Table 6 shows definitions of messages used in the first embodiment
- Table 7 shows definitions of TLVs used in the first embodiment.
- FIG. 9 is a diagram illustrating an MBS synchronization rule transmission procedure according to a second embodiment of the present invention.
- MBS DPF and MBS synchronization executor are co-located in BS
- MBS distributed DPF and MBS synchronization controller are co-located in ASN-GW.
- the R6 data path between the ASN-GW and the BS uses a Type 1 payload and is classified by the MBS Distribution DPF as corresponding to a particular MBS service flow and has a corresponding GRE SN. Send raw IP packets.
- a complementary sync rule, control information, etc. are transmitted from the ASN-GW to the BS through the R6 control plane.
- the MBS synchronization controller sends a synchronization rule to the MBS synchronization executor every ⁇ .
- some parameters of the synchronization rule may be implemented to be preconfigured in the MBS synchronization executor.
- the MCBCS server / controller transmits one or more MCBCS data packets to the ASN-GW via the R3 data path (see step S910).
- the MBS distribution DPF of the ASN-GW has a preset period [To; T1] receive and accumulate MCBCS data packets.
- the MBS distribution DPF classifies incoming MCBCS data packets into an appropriate MCBCS service flow and applies a corresponding WiMAX Convergence Sublayer rule (eg, Packet Header Suppression).
- the MBS distributed DPF then allocates a GRE SN for each packet.
- the MBS synchronization controller of the ASN-GW collects information such as GRE SN and MCBCS data packet size from the MBS distribution DPF, and configures an MBS synchronization rule message applied to the MBS data to be transmitted by the MBS distribution DPF. (See step S920). At this time, the MBS synchronization rule message includes all synchronization rules for bearer processing.
- the MBS synchronization controller may exclude these TLVs in subsequent MBS synchronization rule messages.
- the TLV indicating MBS information is an exception, which is included in every MBS synchronization rule message.
- the MBS distribution DPF performs a preset period [To; T1] transfers the accumulated MCBCS data packets to each MBS DPF in the MBS zone (see step S930).
- the MBS DPF then provides multicast and broadcast services by packaging the MCBCS data packets into MBS bursts and sending them to the MS (see step S940).
- Table 8 illustrates the format of the MBS synchronization rule message transmitted from the MBS synchronization controller to the MBS synchronization executor.
- Table 9 shows the definition of the message used in the second embodiment
- Table 10 shows the definition of the TLV used in the second embodiment.
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Claims (23)
- 멀티캐스트 및 브로드캐스트 서비스(Multicast and Broadcast Service) 방법으로서,ASN-GW(Access Service Network - Gateway)가 MBS(Multicast and Broadcast Service) 동기화 룰을 BS(Base Station)로 전송하는 단계;상기 BS가 상기 MBS 동기화 룰에 포함되어 있는 다음 MBS 동기화 룰 예상 도착 시간까지 다음 MBS 동기화 룰을 수신하지 못하면, 상기 ASN-GW로 미수신된 MBS 동기화 룰의 복구를 요청하는 단계; 및상기 ASN-GW가 상기 미수신된 MBS 동기화 룰을 상기 BS로 재전송하는 단계를 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 제1항에 있어서,상기 ASN-GW는 미수신된 MBS 동기화 룰의 복구 요청에 포함된 동기화 룰 GPS 타임스탬프(Sync Rule GPS Timestamp)를 이용하여 상기 미수신된 동기화 룰을 식별하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 제1항 또는 제2항에 있어서,상기 BS는 상기 ASN-GW로부터 미수신된 MBS 동기화 룰을 재전송 받지 못하면 상기 ASN-GW로 미수신된 MBS 동기화 룰의 복구 요청을 재시도하고, 재시도 회수가 기 설정된 최대 재시도 회수에 도달하면 다음 MBS 동기화 룰이 성공적으로 수신될 때까지 기 수신된 MBS 데이터를 폐기하는 단계를 더 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 제1항 또는 제2항에 있어서,상기 ASN-GW는 MBS 동기화 룰을 생성하여 상기 BS로 전송하는 MBS 동기화 컨트롤러(MBS Synchronization Controller)를 포함하고, 상기 BS는 상기 MBS 동기화 컨트롤러로부터 MBS 동기화 룰을 수신하여 MBS 동기화를 실행하는 MBS 동기화 실행기(MBS Synchronization Executer)를 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 제1항 또는 제2항에 있어서,상기 MBS 동기화 룰은 하나 이상의 MBS 버스트 전송을 위한 파라미터들을 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 제1항 또는 제2항에 있어서,연속적인 MBS 동기화 룰에 포함될 적어도 하나의 파라미터의 값이 동일하게 유지될 경우, 상기 동일하게 유지되는 파라미터는 후속의 MBS 동기화 룰에서 생략되는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 멀티캐스트 및 브로드캐스트 서비스(Multicast and Broadcast Service) 방법으로서,ASN-GW(Access Service Network - Gateway)가 MBS(Multicast and Broadcast Service) 데이터를 BS(Base Station)로 전송하는 단계;상기 BS가 MBS 동기화 룰에 포함된 GRE(Generic Routing Encapsulation) SN(Sequence Number)를 참조하여 MBS 데이터의 분실을 검출하고, MBS 데이터의 분실이 검출되면 상기 ASN-GW로 분실된 MBS 데이터의 복구를 요청하는 단계; 및상기 ASN-GW가 상기 분실된 MBS 데이터를 상기 BS로 재전송하는 단계를 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 제7항에 있어서,상기 BS는 상기 ASN-GW로부터 분실된 MBS 데이터를 재전송 받지 못하면 상기 ASN-GW로 분실된 MBS 데이터 복구 요청을 재시도하고, 재시도 회수가 기 설정된 최대 재시도 회수에 도달하면 MBS 프레임을 위한 전체 MBS 데이터를 폐기하는 단계를 더 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 제7항에 있어서,상기 MBS 데이터 복구 요청 단계와 상기 MBS 데이터 재전송 단계 사이에,상기 ASN-GW가 분실된 MBS 데이터의 복구 요청에 응답하여 상기 BS에게 SDU(Service Data Unit) 크기를 알려주는 단계를 더 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 제9항에 있어서,상기 BS는 상기 ASN-GW로부터 분실된 MBS 데이터를 재전송 받지 못하면 상기 ASN-GW로 분실된 MBS 데이터 복구 요청을 재시도하고, 재시도 회수가 기 설정된 최대 재시도 회수에 도달하면 상기 SDU 크기를 이용하여 무선 자원(air resource)을 할당하고 MBS 프레임을 전송하는 단계를 더 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 제7항 내지 제10항 중 어느 한 항에 있어서,상기 ASN-GW는 MCBCS 서버/컨트롤러로부터 MBS 데이터를 수신하여 배포하는 MBS 배포 DPF(MBS Distribution Data Path Function)를 포함하고, 상기 BS는 상기 MBS 배포 DPF로부터 MBS 데이터를 수신하여 MBS 버스트로 패키징하는 MBS DPF(MBS Data Path Function)를 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 멀티캐스트 및 브로드캐스트 서비스(Multicast and Broadcast Service) 방법으로서,ASN-GW(Access Service Network - Gateway)가 기 설정된 주기 동안 MCBCS 서버/컨트롤러로부터 MCBCS 데이터 패킷을 수신하여 축적하는 단계;상기 ASN-GW가 MCBCS 데이터 패킷에 대해 GRE(Generic Routing Encapsulation) SN(Sequence Number)을 할당하여 MBS(Multicast and Broadcast Service) 동기화 룰을 구성하고 BS(Base Station)로 전송하는 단계;상기 BS가 MBS 동기화 룰을 정상적으로 수신하면, 상기 ASN-GW가 기 설정된 주기 동안 축적된 MCBCS 데이터 패킷을 상기 BS로 전송하는 단계; 및상기 BS가 상기 MBS 동기화 룰에 포함된 GRE SN을 참조하여 상기 MCBCS 데이터 패킷을 MBS 버스트로 패키징하고, 상기 MBS 버스트를 MS(Mobile Station)로 전송하는 단계를 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 제12항에 있어서,상기 BS로 MCBCS 데이터 패킷을 전송하는 단계 이전에,상기 BS가 상기 MBS 동기화 룰에 포함되어 있는 다음 MBS 동기화 룰 예상 도착 시간까지 다음 MBS 동기화 룰을 수신하지 못하면, 상기 ASN-GW로 미수신된 MBS 동기화 룰의 복구를 요청하는 단계; 및상기 ASN-GW가 상기 미수신된 MBS 동기화 룰을 상기 BS로 재전송하는 단계를 더 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 제13항에 있어서,상기 ASN-GW는 미수신된 MBS 동기화 룰의 복구 요청에 포함된 동기화 룰 GPS 타임스탬프(Sync Rule GPS Timestamp)를 이용하여 상기 미수신된 동기화 룰을 식별하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 제12항 내지 제14항 중 어느 한 항에 있어서,상기 MS로 MBS 버스트를 전송하는 단계 이전에,상기 BS가 MBS 동기화 룰에 포함된 GRE(Generic Routing Encapsulation) SN(Sequence Number)를 참조하여 MBS 데이터의 분실을 검출하고, MBS 데이터의 분실이 검출되면 상기 ASN-GW로 분실된 MBS 데이터의 복구를 요청하는 단계; 및상기 ASN-GW가 상기 분실된 MBS 데이터를 상기 BS로 재전송하는 단계를 더 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 방법.
- 멀티캐스트 및 브로드캐스트 서비스(Multicast and Broadcast Service) 시스템으로서,MBS 데이터를 수신하여 배포하는 MBS 배포 DPF(MBS Distribution Data Path Function);상기 MBS 데이터에 대한 GRE(Generic Routing Encapsulation) SN(Sequence Number)을 포함하는 MBS 동기를 위한 MBS 동기화 룰을 생성하여 전송하는 MBS 동기화 컨트롤러(MBS Synchronization Controller);상기 MBS 동기화 컨트롤로부터 상기 MBS 동기화 룰을 수신하여 MBS 동기화를 실행하는 MBS 동기화 실행기(MBS Synchronization Executer); 및상기 MBS 배포 DPF로부터 MBS 데이터를 수신하여 MBS 버스트로 패키징하여 MS(Mobile station)으로 전송하는 MBS DPF(MBS Data Path Function)를 포함하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 시스템.
- 제16항에 있어서,상기 MBS 동기화 실행기는 상기 MBS 동기화 룰에 포함되어 있는 다음 MBS 동기화 룰 예상 도착 시간까지 다음 MBS 동기화 룰을 수신하지 못하면, 상기 MBS 동기화 컨트롤러로 미수신된 MBS 동기화 룰의 복구를 요청하고,상기 MBS 동기화 컨트롤러는 상기 미수신된 MBS 동기화 룰을 상기 MBS 동기화 실행기로 재전송하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 시스템.
- 제17항에 있어서,상기 MBS 동기화 실행기는 상기 MBS 동기화 컨트롤러로부터 미수신된 MBS 동기화 룰을 재전송 받지 못하면 상기 MBS 동기화 컨트롤러로 미수신된 MBS 동기화 룰의 복구 요청을 재시도하고, 재시도 회수가 기 설정된 최대 재시도 회수에 도달하면 다음 MBS 동기화 룰이 성공적으로 수신될 때까지 기 수신된 MBS 데이터를 폐기하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 시스템.
- 제16항 내지 제18항 중 어느 한 항에 있어서,상기 MBS DPF는 MBS 동기화 룰에 포함된 GRE(Generic Routing Encapsulation) SN(Sequence Number)를 참조하여 MBS 데이터의 분실을 검출하고, MBS 데이터의 분실이 검출되면 상기 MBS 배포 DPF로 분실된 MBS 데이터의 복구를 요청하며,상기 MBS 배포 DPF는 상기 분실된 MBS 데이터를 상기 MBS DPF로 재전송하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 시스템.
- 제16항에 있어서,상기 MBS 동기화 컨트롤러는 연속적인 MBS 동기화 룰에 포함될 적어도 하나의 파라미터의 값이 동일하게 유지될 경우, 상기 동일하게 유지되는 파라미터는 후속의 MBS 동기화 룰에서 생략하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 시스템.
- 제16항에 있어서,상기 MBS 배포 DPF 및 상기 MBS 동기화 컨트롤러는 ASN-GW(Access Service Network - Gateway)에 구비되고,상기 MBS DPF 및 상기 MBS 동기화 실행기는 BS(Base Station)에 구비되는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 시스템.
- 멀티캐스트 및 브로드캐스트 서비스(Multicast and Broadcast Service) 시스템으로서,MCBCS 데이터 패킷를 수신하고, 해당 MCBCS 서비스플로우로 상기 MCBCS 데이터 패킷을 분배하고, 상기 MCBCS 데이터 패킷들에 GRE(Generic Routing Encapsulation) SN(Sequence Number)를 부여하는 MBS 배포 DPF(MBS Distribution Data Path Function);상기 MCBCS 데이터 패킷들에 적용하는 MBS 동기화 룰을 구성하는 MBS 동기화 컨트롤러(MBS Synchronization Controller); 및상기 MBS 동기화 룰을 수신하고, 상기 MBS 동기화 룰에 따라 상기 MCBCS 데이터 패킷들에 대해 MBS 동기를 수행하는 MBS 동기화 실행기(MBS Synchronization Executer)를 포함하고,상기 MBS 배포 DPF와 상기 MBS 동기화 컨트롤러는 ASN-GW에 위치하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 시스템.
- 제22항에 있어서,상기 MBS 동기화 실행기는 상기 MBS 동기화 룰에 포함되어 있는 다음 MBS 동기화 룰 예상 도착 시간까지 다음 MBS 동기화 룰을 수신하지 못하면, 상기 MBS 동기화 컨트롤러로 미수신된 MBS 동기화 룰의 복구를 요청하고,상기 MBS 동기화 컨트롤러는 상기 미수신된 MBS 동기화 룰을 상기 MBS 동기화 실행기로 재전송하는 것을 특징으로 하는 멀티캐스트 및 브로드캐스트 서비스 시스템.
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