Base station in wide-band wireless access-in system and method for realizing multi-cast business

一种接入系统、宽带无线的技术，应用在传输系统、无线通信、数字传输系统等方向，能够解决浪费空口带宽资源、不安全、增加处理负担等问题，达到节约带宽资源、保证安全性、工作简单的效果

Inactive Publication Date: 2006-10-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

This implementation method is relatively simple, but it also has certain disadvantages: it increases the processing burden of receivers who do not need multicast messages, and also increases the power consumption of SS equipment
In addition, hosts that have not joined the group can also receive multicast packets, which will lead to an unsafe situation
[0007] b. According to certain rules (for example, it can be manually configured), change the multicast message into a unicast message and send it to the SS in need, so that only the receiver (SS) who needs the multicast message will receive it However, in this implementation method, BS equipment or other equipment is required to implement the multicast replication function, which increases the complexity of the equipment. For example, if there are many SSs in the multicast group, they need to be copied one by one To each SS, this will increase the complexity of the BS equipment, and also greatly waste the bandwidth resources of the air interface. Due to traffic duplication, it will easily become the bottleneck of the network

Method used

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Embodiment Construction

[0027] The host referred to in the present invention refers to a node (non-router) that cannot forward IP data packets that are not explicitly addressed to itself. Typically, hosts are the source and destination of IP traffic. A host silently discards traffic it receives that is not explicitly addressed to itself, as in Figure 1 to Figure 3 The user in can be thought of as a form of host.

[0028] See Figure 4 As shown in the layered system of the multicast protocol, it can be seen that the Internet Group Management Protocol (Internet Group Management Protocol, IGMP) is at the bottom of the multicast protocol and is the basis of the entire multicast protocol. IGMP is used for routers to join hosts Or leave the multicast group for dynamic management, and establish a three-layer multicast address forwarding table. Among the multicast protocols, only the IGMP protocol directly communicates with on-demand hosts. The router running IGMP is responsible for managing the joining ...

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Abstract

In broadband wireless access system, base station with router and multiple user stations being connected to includes following parts: listening module in use for listening message between user station and router, or module of message proxy in use for intercepting message between user station and router; module for maintaining forwarding table of multicast address, module for executing multicast forwarding are in use for allotting an identical connection id for all user station in multicast group in order to manage adding or removed group of user station, or maintaining user data, and sending multicast data to user station. The invention also discloses relevant method. User stations in multicast group are not possible to receive multicast message by using the invention so as to reduce power consumption of user station, and raise safety. Moreover, equipment in base station does not need to carry out replication of multicast packet so as to save bandwidth resource of aerial port.

Description

technical field [0001] The present invention relates to a broadband wireless access system, in particular to a base station in the broadband wireless access system and a method for realizing multicast service. Background technique [0002] Traditional IP communication (such as IPv4 communication) is performed between a source IP host and a target IP host (unicast) or between a source IP host and all IP hosts in the network (broadcast). If we want to send information to multiple but not all IP hosts in the network, either broadcast or the source IP host sends IP packets to multiple target IP hosts in the network. The former method not only wastes bandwidth by sending information to unnecessary IP hosts, but may also cause a serious broadcast storm due to routing loopbacks; the latter method wastes a lot of bandwidth due to repeated sending of IP packets, and also Increased server load. It can be said that the traditional IP communication technology cannot effectively solve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/28H04L29/06H04W4/06H04W4/08H04W88/08
CPCH04L45/16H04W72/121H04W76/40H04W88/08Y02D30/70
Inventor 凌魏
Owner HUAWEI TECH CO LTD
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