WO2009052758A1

WO2009052758A1 - A QoS GUARANTEE METHOD, SYSTEM AND BASE STATION WHEN GPON BEING BACKHAUL OF 802.16 PROTOCOL

Info

Publication number: WO2009052758A1
Application number: PCT/CN2008/072738
Authority: WO
Inventors: Ruobin Zheng
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-10-19
Filing date: 2008-10-17
Publication date: 2009-04-30
Also published as: CN101415014B; CN101415014A

Abstract

A QoS guarantee method, system and base station when GPON being backhaul of 802.16 protocol. The method includes: setting the QoS mapping between 802.16 protocol and GPON protocol; realizing the QoS transformation between the 802.16 protocol's backhaul and the GPON protocol's connection in the base station according to the set QoS mapping. Through using the QoS mapping between the 802.16 protocol and the GPON protocol by the embodiments, the transformation between the 802.16 protocol's backhaul and the GPON protocol's connection is realized, thus GPON could be used as 802.16 protocol's backhaul.

Description

OPON guarantee method, system and base station when GPON is used as backhaul connection based on 802.16 protocol

Technical field

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

Compared with active optical access technology, PON (Passive Optical Network) eliminates the active equipment between the central office and the customer end, thus making maintenance orders simple, high reliability, and low cost. Moreover, it can save fiber resources and is the main solution for FTTH (Fiber To The Home). Among them, GPON (Gigabit Passive Optical Network) is mainly used for the backhaul connection of FTTII and wireless communication base stations.

In particular, with the rapid spread of 802.16 technology, how to use GPON as a backhaul connection for base stations using the 802.16 protocol has become an increasingly important focus.

And how to establish a unified QoS (Quality of Service) framework for the GPON protocol and the 802.16 protocol, that is, the implementation of the QoS mapping of the GPON protocol and the 802.16 protocol has become an urgent problem to be solved. Summary of the invention

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.

To achieve the above objective, 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.

On the other hand, 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.

Compared with the prior art, 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. DRAWINGS

1 is a schematic diagram of a layered model of an 802.16 protocol according to an embodiment of the present invention;

2 is a schematic diagram of a layered model of a GPON protocol according to an embodiment of the present invention;

3 is a schematic diagram of a GEM multiplexing service flow according to an embodiment of the present invention;

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;

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;

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;

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

In order to facilitate the understanding of the 802.16 protocol and the QoS mapping method and apparatus of the GPON protocol proposed by the embodiments of the present invention, the following describes the 802.16 protocol and the GPON protocol:

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.

As shown in 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). This includes performing classification on the external network data SDU and mapping to the appropriate MAC traffic flow and connection identifier (CID), and may even include functions such as payload suppression (PHS). 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.

Among them, 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.

As mentioned earlier, the final step in the initialization process of the SS (Su base station, the subscriber station) 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). The three service flows all have SFIDs. However, for the pre-assigned service flow system, 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). 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 rtPSertPS, 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): The nrtPS polls the connection in a certain period.

BE (Best Effort Service): Provides the greatest possible service based on network conditions.

In the 802.16 protocol, 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. 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.

As shown in 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.

(1) 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.

(2) 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.

Another level of the GPON protocol is the GPM, which is responsible for the transmission of GTC frames over the fiber. 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 ΟΝΤ 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. As shown in 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.

Because the ONT-to-OLT upstream service flow is transmitted by time division multiple access, only one 0NT uplink transmission data can be transmitted at the same time, 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. 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. 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.

Before the OLT and the ONT transmit data, 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).

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.

In summary, in the 802.16 system and the GPON system, different service types correspond to different QoS parameters, and different data flows also include different QoS parameters required for connection. Therefore, 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. When the QoS parameters of the service type conflict with the QoS parameters of the data flow, the parameters to be mapped later are subject to, for example, the connection mode mapping is performed first. When the service type mapping is performed, the QoS parameters of the service type are taken as the standard. This is advantageous for the base station to set a corresponding QoS mapping according to its own service situation. For example, when the base station is only for a certain type of traditional service (internet, voice or IPTV), 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.

The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings and embodiments.

As shown in 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. Give the subscriber station SS/mobile station MS.

According to the above network diagram, 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. If 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. There are different 802.16 protocols and GPON protocols. Service types and service flows, and different service types and service flows require different QoS parameters, such as delay, jitter, throughput, and so on. 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.

In the embodiment of the present invention, according to the characteristics of the 802.16 protocol service type and the GPON protocol service type, 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

UGS T-CONT Type 4 : Fixed Bandwidth rt - PS

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. -CONT Type 4 QoS mapping. Similarly, the QoS mapping of other service types is also set separately.

The embodiment of the present invention further provides a setting manner of a connection mapping. As shown in 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. In the embodiment of the present invention, 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. 7, sectors or frequencies 1 and 2 correspond to ONU2, and sectors or frequencies 1 and 2 are mapped to T-CONT 1 and T-CONT2 of ONU 2, respectively; and sector or frequency 3 is ONU1 corresponds. Therefore, the services of all subscriber stations SS in the sector or frequency point can be mapped into the corresponding T-CONT, for example, the services of all subscriber stations SS of the sector or frequency point 3 are mapped into the T-CONT of the ONU1, that is, The subscriber station SS31, which can set the sector or frequency point 3, corresponds to the GEM Port ID 31, and the subscriber station SS32 of the sector or frequency point 3 corresponds to the GEM Port ID 32.

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 Optionally, 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. 8, 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

T-CONT connection mapping, 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. As shown in Figure 9, 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, and all service types of each subscriber station SS are mapped to the subscriber station. In the corresponding T-CONT, for example, 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. Optionally, the subscriber station SS maps to the GEM Port (as in Figure 10) or the SFID/CID maps to the GEM Port (Figure 11). As shown in Figure 10, the base station corresponds to T-CONT1 and T-CONT2, T-CONT1 corresponds to service type 1, T-CONT2 corresponds to service type 2, and 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

T-CONT connection mapping:

(a) The subscriber station SS corresponds to multiple T-CONTs, and each GEM Port corresponds to one type of service. For example, as shown in 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.

(b) 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. For example, as shown in FIG. 13, 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.

The foregoing 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. In addition, according to the multiple QoS mapping modes proposed by the embodiments of the present invention, an appropriate QoS mapping manner can be selected according to the service condition of the base station, thereby achieving a better QoS guarantee.

As shown in FIG. 14, 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. In connection, 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. For example, 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.

Preferably, 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.

In the embodiment of the present invention, the QoS mapping module is described as a separate module in a base station. However, 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.

According to the foregoing base station 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.

Through the description of the above embodiments, those skilled in the art can clearly understand that 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.

In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

A QoS guarantee method for GPON as a backhaul connection based on the 802.16 protocol, characterized in that it comprises the following steps:

Establish QoS mapping of 802.16 protocol and GPON protocol according to the service type and/or connection mode of 802.16 protocol and GPON protocol;

According to the established QoS mapping, the 802.16 protocol backhaul connection and the GPON protocol connection QoS conversion are implemented in the base station.

2. The method according to claim 1, wherein the establishing the QoS mapping of the 802.16 protocol and the GPON protocol specifically includes:

Establishing 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 according to the service type of the 802.16 protocol and the service type of the GPON protocol; or

Establishing a QoS mapping of the service flow identifier SFID or the connection identifier CID in the 802.16 protocol and the GEM port ID of the Gigabit passive optical network encapsulation mode port identifier in the GPON protocol; or

Establishing a QoS mapping of the base station/sector/base station frequency point to the GPON interface/ONU/ONT.

The method according to claim 2, after the establishing the QoS mapping of the base station/sector/base station frequency point and the GPON interface/ONU/ONT, the method further includes: establishing the 802.16 protocol The mapping of the sector/frequency point to the T-CONT in the GPON protocol;

Establishing a mapping of the user station SS or service type in the sector/base station frequency to the GEM port of the corresponding ONU.

4. The method of claim 1, wherein the establishing the QoS mapping of the 802.16 protocol and the GPON protocol specifically includes:

Establish a mapping of the base station/sector/base station frequency point to a single T-CONT.

5. The method of claim 4, further comprising:

Establishing the subscriber station SS or service type or industry in the base station/sector/base station frequency The mapping of the service flow SFID or CID to the GEM port in the corresponding T-CONT.

The method of claim 1, wherein the establishing the QoS mapping of the 802.16 protocol and the GPON protocol specifically includes:

A connection map of the connection to the single T-CONT for each subscriber station SS in the base station/sector/frequency is established.

7. The method according to claim 6, further comprising: establishing a mapping of a service type in the subscriber station SS in the base station/sector/frequency to a GEM port in the corresponding T-CONT.

8. The method of claim 1, wherein the establishing the QoS mapping of the 802.16 protocol and the GPON protocol specifically includes:

Establishing a mapping of the base station/sector/frequency point to multiple T-CONTs;

And mapping the service type to the T-CONT according to the service type of the base station/sector/frequency.

The method according to claim 8, wherein after the mapping of the service type and the T-CONT is established, the method further includes:

Establishing a mapping between the user station SS and the GEM port in the corresponding T-CONT in the service type, or establishing a mapping between the service flow SFID or CID in the service type and the GEM port in the corresponding T-CONT.

A mapping of the connection to the multi-T-CONT for each subscriber station SS in the base station/sector/frequency is established.

The method according to claim 10, further comprising: after the mapping between the user station SS and the multi-T-CONT in the establishing the base station/sector/frequency point, the method further includes:

Establishing a mapping between the service type in the user station SS and the GEM port in the corresponding T-CONT, or establishing a mapping between the service type and the single T-CONT in the user station SS.

The method according to claim 10, further comprising: after the mapping of the service type and the single T-CONT in the user station SS is established,

Establishing a service flow SFID or CID in the service type and corresponding single T-CONT Mapping of GEM ports.

A base station, wherein 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.

The 802.16 processing module is configured to perform processing on a physical layer and a MAC layer of the corresponding 802.16 protocol according to a service type and/or a connection mode of the 802.16 protocol and the GPON protocol;

The GPON processing module is configured to perform corresponding GPON protocol processing according to the service type and/or connection mode of the 802.16 protocol and the GPON protocol;

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 base station according to claim 13, wherein the QoS mapping module includes a service type mapping sub-module, configured to establish the 802.16 according to the service type of the 802.16 protocol and the characteristics of the GPON protocol service type. The service type of the protocol is mapped to the QoS mapping of the service container T-CONT type in the GPON protocol.

The base station according to claim 13 or 14, wherein the QoS mapping module further comprises a connection mapping sub-module, configured to implement a backhaul connection of the 802.16 protocol and a QoS translation of the GPON protocol connection.

A QoS guarantee system for a GPON as an 802.16 backhaul connection, comprising: a base station, a serving node, and at least one user station, wherein the base station and the serving node are connected by using a GPON protocol, the base station and the user The station is connected through a backhaul of the 802.16 protocol, and the base station is further configured to implement a backhaul connection of the 802.16 protocol and a QoS transition of the GPON protocol connection.