WO2009052758A1 - Procédé, système et station de base à garantie de qualité de service lorsqu'un réseau optique passif gigabit est une liaison terrestre du protocole 802.16 - Google Patents

Procédé, système et station de base à garantie de qualité de service lorsqu'un réseau optique passif gigabit est une liaison terrestre du protocole 802.16 Download PDF

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Publication number
WO2009052758A1
WO2009052758A1 PCT/CN2008/072738 CN2008072738W WO2009052758A1 WO 2009052758 A1 WO2009052758 A1 WO 2009052758A1 CN 2008072738 W CN2008072738 W CN 2008072738W WO 2009052758 A1 WO2009052758 A1 WO 2009052758A1
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Prior art keywords
protocol
gpon
mapping
base station
qos
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PCT/CN2008/072738
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English (en)
Chinese (zh)
Inventor
Ruobin Zheng
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Huawei Technologies Co., Ltd.
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Publication of WO2009052758A1 publication Critical patent/WO2009052758A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/462—LAN interconnection over a bridge based backbone
    • H04L12/4625—Single bridge functionality, e.g. connection of two networks over a single bridge
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0084—Quality of service aspects

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a QoS guarantee method, system, and base station when GPON is used as a backhaul connection based on the 802.16 protocol. Background technique
  • PON Passive Optical Network
  • FTTH Fiber To The Home
  • GPON Gigabit Passive Optical Network
  • the embodiment of the invention provides a QoS guarantee method, system and base station for GPON as a backhaul connection based on the 802.16 protocol, so as to establish a unified QoS framework and QoS parameters when the GPON is used as an 802.16 backhaul connection, and implement the 802.16 protocol and the GPON protocol. QoS mapping between.
  • an embodiment of the present invention provides a QoS guarantee method for GPON as a backhaul connection based on the 802.16 protocol, including the following steps: establishing a QoS mapping of the 802.16 protocol and the GPON protocol; according to the established QoS mapping, The QoS conversion of the 802.16 backhaul connection and the GPON protocol connection is implemented in a base station.
  • the embodiment of the present invention further provides a base station, where the base station uses GPON as a backhaul connection, and the base station includes an 802.16 processing module, a QoS mapping module, and a GPON processing module, where the 802.16 processing module is configured to perform corresponding The processing of the physical layer and the MAC layer of the 802.16 protocol; the GPON processing module is configured to perform corresponding GPON protocol processing; and the QoS mapping module is configured to implement QoS conversion of the connection between the 802.16 processing module and the GPON processing module.
  • the embodiment of the present invention further provides a GQoS as a QoS guarantee system for a backhaul connection based on the 802.16 protocol, including a base station, a serving node, and at least one user station, where the base station and the serving node are connected by using a GPON protocol, the base station The user station is connected to the 802.16 backhaul, and the base station is further configured to implement QoS conversion of the 802.16 backhaul connection and the GPON protocol connection.
  • a GQoS as a QoS guarantee system for a backhaul connection based on the 802.16 protocol, including a base station, a serving node, and at least one user station, where the base station and the serving node are connected by using a GPON protocol, the base station The user station is connected to the 802.16 backhaul, and the base station is further configured to implement QoS conversion of the 802.16 backhaul connection and the GPON protocol connection.
  • the embodiment of the invention has at least the following advantages:
  • the QoS mapping between the 802.16 protocol and the GPON protocol is adopted to realize the conversion of the 802.16 backhaul connection and the GPON protocol connection, so that the GPON can be used as the 802.16 backhaul connection.
  • FIG. 1 is a schematic diagram of a layered model of an 802.16 protocol according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a layered model of a GPON protocol according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a GEM multiplexing service flow according to an embodiment of the present invention.
  • FIG. 4 is a network diagram of a base station system when GPON is used as an 802.16 backhaul connection according to an embodiment of the present invention
  • FIG. 5 is a flowchart of a QoS guarantee method when a GPON is used as an 802.16 backhaul connection according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a connection mapping according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of Embodiment 1 of a connection mapping according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of Embodiment 2 of a connection mapping according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of Embodiment 3 of a connection mapping according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of mapping an SS to a GEM according to Embodiment 4 of the present invention
  • FIG. 11 is a schematic diagram of mapping a CID to a GEM according to Embodiment 4 of the present invention
  • FIG. 12 is a schematic diagram of Embodiment 5a of the present invention
  • Figure 13 is a schematic diagram of Embodiment 5 b) of the present invention.
  • FIG. 14 is a structural diagram of a QoS guarantee system when GPON is used as an 802.16 backhaul connection according to an embodiment of the present invention. detailed description
  • the IEEE proposes a range of complementary wireless technology standards for specific market needs and application models.
  • the widely adopted standard families include IEEE 802.15 for home interconnection and IEEE 802.11 for wireless LAN.
  • the proposed 802.16 protocol makes up for the gap in IEEE wireless metropolitan area network standards.
  • the 802.16 protocol also known as the IEEE Wireless MAN air interface standard, is an air interface specification for 2-66 GHz. Because it specifies a wireless access system with a coverage of 50 km, the 802.16 protocol system is mainly used in metropolitan area networks. It is considered a "last mile" broadband access solution that can compete with DSL.
  • FIG. 1 it is a schematic diagram of a layered model of an 802.16 protocol according to an embodiment of the present invention.
  • the 802.16 protocol defines a PHY layer (physical layer) and a MAC layer (Media Access Control, data link layer) of the 802.16 protocol, where The MAC layer is further divided into a service-oriented SSCS layer or a CS layer (Specific Service Convergence Sublayer), a MAC CPS layer (MAC Common Part Sublayer), and an SS layer (Security Sublayer). ), where the SS layer is optional.
  • the main function of the CS layer is to transfer the external network data received by its service access point.
  • the swap is mapped to a MAC Service Data Unit (SDU) and passed to the MAC Layer Service Access Point (SAP).
  • SDU MAC Service Data Unit
  • SAP MAC Layer Service Access Point
  • PHS payload suppression
  • the protocol provides multiple CS specifications as an interface to various external protocols.
  • the MAC CPS layer is the core part of the MAC. Its main functions include system access, bandwidth allocation, connection establishment and connection maintenance. It receives data from various CS layers through MAC SAP and classifies them into specific MAC connections, and implements QoS control on data transmitted and scheduled on the physical layer.
  • the main function of the SS layer is to provide authentication, key exchange, and encryption and decryption processing.
  • the 802.16 protocol bandwidth allocation and scheduling management is implemented at the MAC CPS layer.
  • One of the key features of the 802.16 protocol is support for multiple types of services.
  • the principle of implementing QoS at the MAC layer of the 802.16 protocol is to map the packets transmitted through the MAC to the service flow and to the connection identified by the CID (Connection Identifier), through the QoS provided by the Service Flow (SF). The parameters are scheduled to guarantee the QoS characteristics of the MAC.
  • the final step in the initialization process of the SS is to establish a pre-allocated traffic flow by signaling a dynamic traffic flow setup request.
  • Upstream and downstream are different traffic flows, and traffic flows are classified into three categories according to status: Active, Admitted, and Provisioned traffic.
  • the service flow is uniquely identified by the 32-bit SFID (Service Flow Index).
  • SFID Service Flow Index
  • the three service flows all have SFIDs.
  • resources are not reserved and data cannot be transmitted. Therefore, there is no corresponding CID. If data needs to be transmitted, the traffic flow must be activated by sending a signaling dynamic traffic change request.
  • the CID is assigned to the activated service flow base station (Base Station).
  • the reserved service flow system first reserves resources, and waits for the end-to-end negotiation to complete and then turns into the activated service flow.
  • the activated service flow can be used to transfer data. Therefore, the activated and permitted traffic flows have a corresponding CID indicating that the connection has been established.
  • the traffic flow contains the QoS parameters required for the connection, such as delay, jitter, throughput, and so on. According to no The same application can implement QoS in resource reservation or priority mode.
  • the 802.16 protocol MAC design combines a reservation or priority approach.
  • the 802.16 protocol divides services into five categories based on the characteristics of the service data.
  • the order of priority from high to low is:
  • UGS Unsolicited Grant Service
  • the UGS service is mainly used to support fixed-length data packets transmitted in periodic intervals, such as T1/E1 and Voice over Internet Protocol (VoIP).
  • VoIP Voice over Internet Protocol
  • the real-time data stream that is composed.
  • Rt-PS Real-time Polling Service
  • the rtPS service is mainly used to support real-time data streams composed of variable length data such as MPEG video transmitted at regular intervals.
  • Ert - PS Extended Real-Time Polling Service: Used to support real-time traffic flows that periodically generate variable-length packets, such as VoIP with silent compression.
  • Nrt - PS Non-real-time Polling Service
  • BE Best Effort Service: Provides the greatest possible service based on network conditions.
  • a connection is a service flow with QoS requirements.
  • the IETF defines some service models and mechanisms for QoS aspects of IP networks, including: Integrated Services (IntServ) model and Differentiated Services (DiffServ) model.
  • IntServ uses Resource Reservation Protocol (RSVP), and DiffServ can be seen as a relative priority policy.
  • RSVP Resource Reservation Protocol
  • the 802.16 protocol MAC QoS algorithm combines these two mechanisms, drawing on DiffServ's strategy (using the ToS field), and combining IntServ's reserved resources to improve flexibility and guarantee QoS.
  • the 802.16 protocol MAC has calculated the maximum bandwidth required for UGS and rtPS during admission control, ensuring that the system bandwidth meets the maximum bandwidth requirements of these two types of services. If the system capacity is exceeded, it will not be accessible.
  • FIG. 2 it is a schematic diagram of a layered model of a GPON protocol according to an embodiment of the present invention.
  • the GPON protocol can be divided into three layers, one of which is a GPON (GPON Transmission Convergence layer). Floor), It can be divided into two sub-layers: TC Adapter Sublayer and GTC Framing Sublayer.
  • the TC Adapter Sublayer is used to cut the service data received from the ATM Client (Asynchronous Transfer Mode Client) into ATM cells, which will be GEM Client (GPON Encapsulation Method Client, Gigabit).
  • the received traffic of the passive optical network encapsulation mode client is cut into GEM data blocks; and the ATM cells or GEM data blocks in the GTC frame are assembled into corresponding service data.
  • GTC Framing Sublayer is used to perform framing processing on TC frames in GTC. Specifically, before the ATM cell or GEM block, according to PLOAM (Physical Layer OAM, physical layer operation) The control information of the management and maintenance) adds the GTC TC frame header to form a complete GTC TC frame and sends it to the GPM (GPON Physical Media Dependent Layer), which is also used for receiving the GPM Physical Media Dependent Layer. The frame header information is removed from the GTC TC frame and submitted to the TC adaptation sublayer for processing.
  • PLOAM Physical Layer OAM, physical layer operation
  • the GPON protocol stack structure has a level. In addition to the ATM client and the GEM Client, this level includes: PLOAM: responsible for PON physical layer operation, management, and maintenance functions; OMCI (ONU Management and Control Interface, optical network unit management and control interface) ): The OLT can implement the control function of ⁇ through OMCI.
  • the data of OMCI can be encapsulated into ATM cell or GEM data block transmission, just like ordinary service data.
  • the GTC layer of the GPON protocol provides two types of service data encapsulation, namely ATM encapsulation and GEM encapsulation.
  • the ATM encapsulation method encapsulates the service data in a 53-byte ATM cell, and the ATM transmission mode is a fixed-length encapsulation method.
  • the GEM encapsulation mode is a variable-length encapsulation mode, which supports changing the GEM encapsulation frame according to the length of the service data.
  • the length, GEM encapsulation can support the encapsulation of TDM and Ethernet text.
  • FIG. 3 it is a schematic diagram of a GEM multiplexing service flow according to an embodiment of the present invention.
  • One OLT's GPON interface supports access to multiple ONTs (ONUs), and each ONT (ONU) supports one or more T-CONTs (traffic containers, Business Container), each T-CONT supports one or more GEM PORTs.
  • 0LT is 0NT to allocate the uplink transmission data time window, and 0NT completes the uplink data transmission in the allocated time window. .
  • 0LT Control The basic control unit of the ONT upstream traffic flow is T-CONT, and the OLT allocates a time window based on the T-CONT.
  • the T-CONT transmission time window macro indicates the T-CONT uplink transmission bandwidth. The longer the time window allocated by the OLT for the T-CONT, the higher the frequency and the larger the bandwidth of the T-CONT uplink transmission.
  • the GPON Ten Office has introduced DBA (Dynamic Bandwidth Assignment) management, which has powerful and flexible QoS scheduling capabilities, which lays the foundation for differentiating users and services for bandwidth management.
  • DBA Dynamic Bandwidth Assignment
  • the GPON protocol uses T-CONT as the traffic scheduling unit, and divides the T-CONT into five types. Different types of T-CONTs have different bandwidth allocation modes, which can meet the delay, jitter, and packet loss rate of different service flows. Different QoS requirements.
  • the GPON protocol divides the bandwidth into four types, namely fixed bandwidth, guaranteed bandwidth (Assured), non-assured bandwidth (Non-Assured), and best-effort bandwidth (BestEffort). The bandwidth allocation priority decreases in turn.
  • the correspondence between the T-CONT type and the bandwidth type is as follows:
  • T-CONT Type 4 Fixed Bandwidth
  • T-CONT Type 3 Guaranteed Bandwidth
  • T-CONT Type 2 Non-guaranteed bandwidth
  • T-CONT Type 1 Best-effort bandwidth
  • T-CONT Type 4 is characterized by fixed-bandwidth fixed time slots. Even if T-CONT has no traffic transmission, the OLT allocates bandwidth for T-CONT, which is suitable for delay-sensitive services such as voice services; T-CONT type 3 is in T. -CONT does not transmit data when bandwidth is allocated to T-CONT. T-CONT has transmission data to ensure bandwidth. It is characterized by fixed bandwidth but time slot uncertainty. It is suitable for fixed bandwidth services with low jitter requirements, such as video on demand services.
  • T-CONT Type 2 is characterized by minimum bandwidth guarantee and dynamic sharing of redundant bandwidth, and has the maximum bandwidth constraint.
  • T-CONT Type 1 It is suitable for services with service guarantee requirements and large burst traffic, such as subscription download service; T-CONT Type 1
  • the feature is best-effort, after the fixed bandwidth, guaranteed bandwidth, and non-guaranteed bandwidth allocation, the remaining bandwidth is used, which is suitable for services with low latency and jitter requirements, such as WEB browsing services.
  • the GPON protocol has both GEM-Port-based logical layer scheduling and T-CONT-based physical layer scheduling. The two-layer scheduling mechanism makes the service flow scheduling accurate and efficient, thus distinguishing user value and business value, and providing differentiated services. become possible.
  • the service transmission channel is negotiated first, and the service channel negotiation is implemented by using the OMCI control message.
  • the GEM mode service transmission channel is called GEM PORT.
  • the OLT allocates the PORT-ID of the service transmission channel GEM PORT to the ONT.
  • the PORT_ID is globally unique, and different service flows are assigned different PORT_IDs.
  • the downlink data of the OLT to the ONT is broadcasted to all ONTs.
  • the TC adaptation sublayer of the ONT in the protocol stack will receive the service data carried by all GEM PORTs sent by the OLT.
  • the GEM PORT carrying the service data is not necessarily allocated by the OLT for the ONT.
  • the ONT does not have the right to receive the traffic of the GEM PORT that is not allocated for the ONT. Therefore, the ONT filters the PORT_ID according to the GEM PORT at the TC adaptation sublayer. Only the OLT passes the OMCI channel. The data carried by the PORT_ID assigned to this ONT is received (corresponding to the port identification filtering function in the GPON protocol stack diagram).
  • the ONT Uplink unicast data transmission from the ONT to the OLT.
  • the ONT carries the user data in the GEM PORT according to the PORT_ID assigned by the OLT, and transmits data in the transmission time window of the T-CONT to which the GEM PORT belongs.
  • the embodiments of the present invention provide a plurality of methods for implementing QoS mapping between the 802.16 system and the GPON system.
  • the mapping may be performed separately according to the service type or the connection mode, or the service type mapping may be performed first, and then the connection manner is performed according to the service type mapping result.
  • the mapping can also be done by first mapping the connection mode and then mapping the service type.
  • the QoS parameters of the service type are taken as the standard.
  • the base station does not need to perform service type division, and the base station is corresponding to A T-CONT, which maps the SFID/CID of all subscriber stations to which the base station belongs to the T-CONT, and the SFID/CID maps to the corresponding GEM Port ID, thereby corresponding to one SF service flow for each 802.16 system.
  • the GEM service flow of the corresponding GPON system implements QoS mapping of the 802.16 system and the GPON system.
  • FIG. 4 it is a networking diagram of a base station system when a GPON is used as a backhaul connection based on an 802.16 protocol according to an embodiment of the present invention.
  • the base station can be regarded as an ONU in a GPON system, and the base station communicates with the service node through the GPON.
  • the process for sending a message from the user station SS to the serving node is as follows:
  • the base station receives the message from the 802.16 protocol air interface (ie, receives the message forwarded from the user station), and performs corresponding 802.16 protocol processing, according to the GPON protocol and 802.16.
  • the QoS mapping relationship of the protocol is processed by the corresponding GPON protocol, and finally transmitted to the OLT through the ODN.
  • the process of sending a message from the serving node to the user station is as follows: after the corresponding GPON protocol is processed for the packet from the OLT, according to the QoS mapping relationship between the GPON protocol and the 802.16 protocol, the corresponding 802.16 protocol is processed, and finally, the packet is processed.
  • the packet is processed.
  • the embodiment of the present invention further provides a QoS guarantee method for GPON as a backhaul connection based on the 802.16 protocol, and the flowchart thereof is as shown in FIG. 5, and includes the following steps:
  • Step S501 establishing a QoS mapping of the 802.16 protocol and the GPON protocol.
  • GPON is to be implemented as an 802.16 backhaul connection
  • a unified QoS framework and QoS parameters need to be established for the 802.16 protocol and the GPON protocol, so that GPON can be used as a QoS guarantee for 802.16 backhaul connections.
  • Embodiments of the present invention can pass
  • the 802.16 protocol and the GPON protocol service type and/or connection mode establish the QoS mapping of the 802.16 protocol and the GPON protocol. For example, QoS mapping is performed according to the connection mode, and the QoS mapping of the SFID/CID and the GEM port ID in the 802.16 protocol is established; or the service type mapping between the 802.16 protocol and the GPON protocol is directly established. You can also map according to the connection relationship and then perform QoS mapping according to the service type. Different mapping methods are needed for different situations of the base station itself. For example, for a base station that is only responsible for traditional services (internet, voice or IPTV), QoS mapping can be directly performed according to its connection, such as corresponding to each sector of the base station.
  • the T-CONT of the GPON protocol the SFID/CID of all service flows in the sector are mapped to the corresponding T-CONT, that is, all SFIDs/CIDs in the sector are mapped to the GEM Port ID of the corresponding T-CONT.
  • Step S502 Implement QoS conversion of the 802.16 backhaul connection and the GPON protocol connection in the base station according to the established QoS mapping. For example, after the base station receives the packet from the 802.16 protocol air interface and performs the corresponding 802.16 protocol processing, according to the QoS mapping relationship between the SFID/CID and the GEM Port ID, the CID of the service flow for the source is 11, and its corresponding The GEM Port ID is 41, and the base station sets the QoS parameters of the service flow (41) in the corresponding GPON protocol according to the QoS parameter of the service flow (11) in 802.16, thereby implementing the interconnection of the 802.16 backhaul connection and the GPON protocol connection, and implementing GPON as 802.16. QoS guarantee for backhaul connections.
  • the QoS mapping of the service type of the 802.16 protocol and the service container T-CONT type in the GPON protocol are established as follows. 802.16 support 5
  • T-CONT supports 4 business types
  • T-CONT Type 3 Guaranteed Bandwidth ert - PS nrt - PS T-CONT Type 2 : Non-guaranteed Bandwidth
  • BE T-CONT Type 1 Best-effort bandwidth Because the UGS service is mainly used to support real-time data streams consisting of fixed-length packets transmitted in periodic intervals such as T1/E1 and non-silent compressed VoIP;
  • the CONT type 4 is characterized by a fixed-bandwidth fixed time slot. Even if the T-CONT has no traffic transmission, the OLT allocates bandwidth for the T-CONT, which is suitable for delay-sensitive services, such as VoIP services. Therefore, the UGS service and T of the 802.16 protocol are established.
  • the embodiment of the present invention further provides a setting manner of a connection mapping.
  • FIG. 6 it is a schematic diagram of a connection mapping according to an embodiment of the present invention.
  • This method establishes different granularity connections in the 802.16 protocol (such as large pipes for base stations/sectors/frequency points, medium pipes for user stations SS, small pipes for service flow SFIDs or CIDs) and different granularities in the GPON protocol.
  • QoS mapping for connections such as large pipes for GPON interfaces/ONU/ONT, medium pipes for T-CONT, small pipes for GEM ports.
  • a plurality of QoS mapping modes of the 802.16 protocol and the GPON protocol are set for different scenarios of the base station application, and the connection mapping manners proposed by the embodiments of the present invention are separately described below.
  • Embodiment 1 The connection mapping between the base station/sector/frequency point and the GPON interface/ONU/ONT, one base station corresponding to one or more GPON interfaces/ONU/ONTs, or one sector or frequency point of the base station corresponding to one or more GPON interface / ONU / ONT. If the base station has more sectors or frequency points, and the number of user stations to which the base station belongs is relatively large, corresponding to one The GPON interface/ONU/ONT may cause the GPON interface to become a load bottleneck, and multiple GPON interfaces/ONU/ONTs may be used. For example, as shown in FIG.
  • Embodiment 2 Connection mapping of a base station/sector/frequency point and a single T-CONT, one base station/sector/frequency point corresponds to one T-CONT, and services of all user stations SS in the base station are mapped to the T-CONT
  • the SS maps to the GEM Port or the service type maps to the GEM Port or the SFID/CID maps to the GEM Port. As shown in FIG.
  • base station 1 corresponds to a T-CONT of ONU1, services of all subscriber stations SS belonging to base station 1 are mapped to this T-CONT, and subscriber station SS31/32 is mapped to GEM Port ID 31/32; base station 2
  • the sector/frequency 1 corresponds to T-CONT1 of ONU2, and the services of all subscriber stations SS belonging to the sector/frequency 1 are mapped to T-CONT1, ie the user station SS11/12 is mapped to the GEM in T-CONT1 Port ID11/12; or as shown in FIG. 9, base station 1 corresponds to a T-CONT of ONU1, all SSs belonging to base station 1 are mapped to this T-CONT, and service type 1/2 is mapped to GEM Port ID 31/ 32.
  • Embodiment 3 Base station/sector/frequency point connection and single for user station SS
  • one base station/sector/frequency point corresponds to multiple T-CONTs, and the base station/sector/frequency point allocates one T-CONT for each subscriber station SS, and all services of each subscriber station SS Both are mapped to the T-CONT corresponding to the subscriber station SS, and optionally the service type is mapped to the GEM Port.
  • base station 2 corresponds to T-CONT1 and T-CONT2 of ONU2
  • subscriber station SS1 corresponds to T-CONT1
  • subscriber station SS2 corresponds to T-CONT2
  • all service types of each subscriber station SS are mapped to the subscriber station.
  • the service type 1/2 of the subscriber station SS1 is mapped to the GEM Port ID 11/12 of the T-CONT1.
  • Embodiment 4 connection mapping of base station/sector/frequency point and multiple T-CONT, base station/ The sector/frequency point corresponds to a plurality of T-CONTs, and each T-CONT corresponds to a service type regardless of which subscriber station SS the service type comes from.
  • the subscriber station SS maps to the GEM Port (as in Figure 10) or the SFID/CID maps to the GEM Port ( Figure 11).
  • the base station corresponds to T-CONT1 and T-CONT2
  • T-CONT1 corresponds to service type 1
  • T-CONT2 corresponds to service type 2
  • SS1/2 under service type 1 maps to G-port ID 11/12 of T-CONT1.
  • SS1/2 under service type 2 is mapped to GEM Port ID 21/22 of T-CONT2; or as shown in Figure 11, CID 11/12 under service type 1 is mapped to GEM Port ID 11/12 of T-CONT1 , CID 21/22 under service type 2 is mapped to GEM Port ID 21/22 of T-CONT2.
  • Embodiment 5 The connection between the base station/sector/frequency point for the subscriber station SS and the multiple
  • the subscriber station SS corresponds to multiple T-CONTs, and each GEM Port corresponds to one type of service.
  • each GEM Port corresponds to one type of service.
  • FIG. 12 there are a subscriber station SS1 and a subscriber station SS2 under the base station, and the subscriber station SS1 corresponds to T-C0NT1 and T-C0NT2, and the service type 1/2 under the subscriber station SS1 is mapped to the GEM Port ID of the T-C0NT1.
  • 11/12, Service Type 3/4 under SSI is mapped to GEM Port ID 21/22 of T-C0NT2.
  • the subscriber station SS corresponds to multiple T-C0NTs, each T-C0NT corresponds to one service type, and the SFID/CID maps to the GEM Port.
  • the base station has a subscriber station SS1 and a subscriber station SS2, the subscriber station SS1 corresponds to T-C0NT1 and T-C0NT2, T-C0NT1 corresponds to the service type 1 of the subscriber station SS1, and T-C0NT2 corresponds to the subscriber station SS1.
  • Service Type 2 CID 11/12 under Service Type 1 of Subscriber Station SS1 is mapped to GEM Port ID 11/12 of T-C0NT1, CID 21/22 under Service Type 2 of Subscriber Station SSI is mapped to T-C0NT2 GEM Port ID 21/22.
  • connection mapping implementation manner can be used to set a corresponding connection mapping for the base stations of various application scenarios, and it should be noted that the foregoing five connection mapping manners in the embodiments of the present invention are only preferred implementation manners, and therefore any similar connection mapping. The manner should also be covered by the scope of protection of the embodiments of the present invention.
  • the GP0N is used as the QoS guarantee method for the backhaul connection based on the 802.16 protocol according to the embodiment of the present invention, because the QoS between the 802.16 protocol and the GP0N protocol is adopted.
  • Mapping which enables the conversion of 802.16 backhaul connections to GPON protocol connections, enabling GPON to act as a backhaul connection for 802.16.
  • an appropriate QoS mapping manner can be selected according to the service condition of the base station, thereby achieving a better QoS guarantee.
  • FIG. 14 is a structural diagram of a QoS guarantee system when a GPON is used as a backhaul connection based on an 802.16 protocol according to an embodiment of the present invention, including a base station 1, a serving node 2, and at least one subscriber station SS3, and the base station 1 and the serving node 2 pass a GPON protocol.
  • the base station 1 and the subscriber station SS3 are connected through an 802.16 backhaul, and the base station 1 is further configured to implement QoS conversion of the 802.16 backhaul connection and the GPON protocol connection.
  • Base station 1 uses GPON as a backhaul connection.
  • the base station 1 can be regarded as an ONU in the GPON system, and the base station 1 communicates with the service node through the GPON protocol connection.
  • the base station 1 includes an 802.16 processing module 11, a QoS mapping module 12, and a GPON processing module 13.
  • the 802.16 processing module 11 is used for processing the physical layer and the MAC layer of the corresponding 802.16 protocol;
  • the GPON processing module 13 is responsible for implementing the GPON protocol, and is composed of the TC layer function module 131 and the ODN interface function module 132.
  • the TC layer function module 131 is configured to implement the GPON transmission aggregation layer function in the GPON protocol, and performs GEM encapsulation or decapsulation processing on the GPON and 802.16 QoS mapping processed messages.
  • the ODN interface function module 132 is used to implement the GPON physical media related layer function in the GPON protocol.
  • the QoS mapping module 12 performs the QoS mapping function of the 802.16 and the GPON, thereby implementing the docking function of the 802.16 protocol connection and the GPON protocol connection.
  • the base station 1 receives the packet from the 802.16 protocol air interface, and after the 802.16 processing module 11 performs the corresponding 802.16 protocol processing, the QoS mapping module 12 performs QoS mapping, according to the QoS mapping relationship between the SFID/CID and the GEM Port ID, such as If the CID of the service flow is 11 and the corresponding GEM Port ID is 41, the base station 1 sets the QoS parameter of the service flow (41) in the corresponding GPON according to the QoS parameter of the service flow (11) in the 802.16 protocol, thereby The interconnection between the 802.16 backhaul connection and the GPON protocol connection is realized, and the QoS guarantee of the GPON as the 802.16 backhaul connection is realized.
  • the QoS mapping module 12 includes a service type mapping sub-module 121 and/or a connection mapping sub-module 122, and the service type mapping sub-module 121 is configured to
  • the 802.16 protocol service type and the characteristics of the GPON protocol service type establish a QoS mapping of the service type of the 802.16 protocol and the T-CONT type of the service container in the GPON protocol.
  • the QoS mapping establishment method is as shown in Table 1 above.
  • the connection mapping sub-module 122 is configured to establish different granularity connections in the 802.16 protocol (such as a large pipe for a base station/sector/frequency, a medium pipe for a subscriber station SS, a small pipe for a service flow SFID or a CID)
  • the QoS mapping of different granularity connections in the GPON protocol (such as large pipes for GPON interfaces/ONU/ONTs, medium pipes for T-CONT, small pipes for GEM ports), the mapping method is shown in Figure 7 - Figure 13. The embodiment described.
  • the QoS mapping module is described as a separate module in a base station.
  • the QoS mapping module may also be configured as a submodule in the 802.16 processing module 11 or in the GPON processing module 13. Therefore, changes in the structure similar to those described above should also be covered by the scope of protection of the embodiments of the present invention.
  • the GPON can be used as the backhaul connection of the 802.16 because the corresponding QoS mapping is set in the base station, thereby realizing the conversion of the 802.16 backhaul connection and the GPON protocol connection.
  • the present invention can be implemented by hardware, or can be implemented by means of software plus necessary general hardware platform, and the technical solution of the present invention. It can be embodied in the form of a software product that can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for making a computer device (may It is a personal computer, a server, or a network device, etc.) that performs the methods described in various embodiments of the present invention.
  • a non-volatile storage medium which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.
  • a computer device may It is a personal computer, a server, or a network device, etc.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé, un système et une station à garantie de qualité de service (QOS) lorsqu'un réseau optique passif gigabit (GPON) est une liaison terrestre du protocole 802.16. Le procédé comprend : le réglage du mappage QOS entre le protocole 802.16 et le protocole GPON ; la réalisation de la transformation QOS entre la liaison terrestre de protocole 802.16 et la connexion de protocole GPON dans la station de base selon le mappage QOS réglé. Par utilisation du mappage QOS entre les protocoles 802.16 et GPON par les modes de réalisation, la transformation entre la liaison terrestre de protocole 802.16 et la connexion de protocole GPON est réalisée, ainsi GPON pourrait être utilisé en tant que liaison terrestre de protocole 802.16.
PCT/CN2008/072738 2007-10-19 2008-10-17 Procédé, système et station de base à garantie de qualité de service lorsqu'un réseau optique passif gigabit est une liaison terrestre du protocole 802.16 WO2009052758A1 (fr)

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CN200710163225.9 2007-10-19

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