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Time slot distribution method and device for adding new node into bus system

A time slot allocation and bus system technology, applied in the field of communication, can solve the problem that the time slot is not used by nodes, and achieve the effect of improving system performance and saving system resources

Active Publication Date: 2009-11-04
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] Through the allocation of the second step, it is possible that some time slots are not used by nodes

Method used

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  • Time slot distribution method and device for adding new node into bus system
  • Time slot distribution method and device for adding new node into bus system
  • Time slot distribution method and device for adding new node into bus system

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0112] A specific embodiment of the first time slot allocation method according to the present invention is shown below.

[0113] Step 1: The new node monitors the entire bus system, confirms clock synchronization, monitors the bus system, and joins the network by occupying free time slots.

[0114] When the bus system is stable, the nodes in the entire network keep communicating. After the new node is started, adjust the automatic gain control setting until the received signal reaches a reasonable level, and then adjust the clock phase-locked loop according to the received signal to achieve clock synchronization and frame synchronization with the entire network.

[0115] After the new node is synchronized with the entire network, it continuously monitors the entire network, and when there is an idle time slot detected according to the continuation command, the new node occupies this idle time slot. If there are multiple new nodes requesting to join the bus system and competi...

specific Embodiment 2

[0121] A specific embodiment of the first time slot allocation method according to the present invention is shown below.

[0122] Step 1: The new node monitors the entire bus system and determines clock synchronization.

[0123] Step 2: Send an interference message to the bus system for a period of time, then stop the interference and start monitoring.

[0124] After the new node and the bus system clock are synchronized, they send messages to the bus system continuously within several time slots. When the network nodes of the bus system detect several consecutive interference conflicts, they know that there is a new node to join, and the nodes in the network modify their own The continuation instruction enables the new node to listen to the free time slot as soon as possible and occupy the time slot. If the new node does not find a free time slot after monitoring for a period of time, it will continue to send interference messages to the bus system for a period of time, then...

specific Embodiment 3

[0129] A specific embodiment of the second time slot allocation method according to the present invention is shown below.

[0130] Step 1: The new node monitors the entire bus system to determine clock synchronization.

[0131] When the bus system is stable, the new node adjusts the automatic gain control setting until the received signal reaches a reasonable level, and then adjusts the clock phase-locked loop according to the received signal to achieve synchronization with the clock of the entire network.

[0132] Step 2: Send messages to the bus system according to certain rules.

[0133] After the new node and the entire bus system achieve clock synchronization, they send messages to the bus system according to certain rules and inform them of information such as the physical address of the node. When the master node of the bus system detects this message and sends a message to The new node sends a message to inform the new node of the available free time slots. When mult...

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Abstract

The present invention provides a time slot allocation method and device for adding a new node in a bus system. The method includes: step S802, the new node monitors the bus system and synchronizes with the clock of the bus system; step S804, the new node monitors the bus Whether the synchronization frames of other nodes in the system have idle time slots in the next or several time slices; Nodes occupy idle time slots for data transmission. The present invention also provides another time slot allocation method for adding a new node in the bus system, including: step S1002, the new node synchronizes with the clock of the bus system and sends a message to the bus system according to a certain rule; and step S1004, the bus system detects After finding the law of conflict occurrence, allocate time slots to new nodes according to the law. The present invention effectively and reasonably allocates system time slots to new nodes based on the TDMA mode when new nodes join.

Description

technical field [0001] The invention relates to the communication field, in particular to a time slot allocation method and device for adding new nodes in a bus system. Background technique [0002] The concept of a home network has been well known many years ago, but so far, there is no set of real home network-based products put into large-scale use. The main reason may be that there is no suitable physical layer protocol for home network. At the same time, due to the rapid development of communication technology and audio and video codec technology, the concept of home network is not only the control and security communication network that was previously concerned, nor is it a simple high-speed video stream or access communication network. It is an integrated and comprehensive network system. [0003] From the perspective of application, a home network should have the following characteristics: ease of use, compatibility, and robustness. From the perspective of communi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/40
Inventor 方李明李莹
Owner HUAWEI TECH CO LTD