JP2012195850A5

JP2012195850A5 -

Info

Publication number: JP2012195850A5
Application number: JP2011059652A
Authority: JP
Filing date: 2011-03-17
Publication date: 2014-05-01
Anticipated expiration: 2031-03-17

Description

本発明は、１つの親ノードと複数の子ノードとを含み、前記親ノードによって生成されるスロット割当情報に基づいてフレームを複数の通信スロットに割り当てて通信を行う通信システムであって、
前記親ノードは、
前記スロット割当情報を生成する生成手段と、
前記スロット割当情報を送信した後、前記複数の子ノードから確認応答を受信する応答受信手段と、
前記確認応答を受信すると前記スロット割当情報を有効化するスロット割当有効化情報を前記複数の子ノードへ送信する送信手段とを有し、
前記複数の子ノードは、
前記親ノードから送信された前記スロット割当情報を受信すると、当該親ノードに確認応答を送信する応答送信手段と、
前記スロット割当有効化情報を受信する受信手段と、
所定の時間が経過するまでに前記親ノードから前記スロット割当有効化情報を受信できない場合に通信を制限する制限手段とを有することを特徴とする。
The present invention provides a single communication system includes a parent node and a plurality of child nodes, communicating by assigning frames to the plurality of communication slots based on the slot allocation information generated by the parent node,
The parent node is
Generating means for generating the slot allocation information;
A response receiving means for receiving an acknowledgment from the plurality of child nodes after transmitting the slot allocation information;
Transmission means for transmitting slot allocation validation information for validating the slot allocation information to the plurality of child nodes upon receiving the confirmation response ;
The plurality of child nodes are:
Upon receiving the slot allocation information transmitted from the parent node, a response transmission means for transmitting an acknowledgment to the parent node ;
Receiving means for receiving the slot allocation validation information;
And having a restricting means constant time Tokoro limits the communication when the said parent node until passage can not receive the slot allocation activation information.

Claims

Includes one parent node and a plurality of child nodes, a communication system for performing communication by assigning a frame into a plurality of communication slots based on the slot allocation information generated by the parent node,
The parent node is
Generating means for generating the slot allocation information;
A response receiving means for receiving an acknowledgment from the plurality of child nodes after transmitting the slot allocation information;
Transmission means for transmitting slot allocation validation information for validating the slot allocation information to the plurality of child nodes upon receiving the confirmation response ;
The plurality of child nodes are:
Upon receiving the slot allocation information transmitted from the parent node, a response transmission means for transmitting an acknowledgment to the parent node ;
Receiving means for receiving the slot allocation validation information;
Communication system, comprising a limiting means for the constant time Tokoro limits the communication when the said parent node until passage can not receive the slot allocation activation information.

The communication system according to claim 1, wherein the predetermined time is preset in the plurality of child nodes or included in the slot allocation information transmitted from the parent node.

The parent node further includes an activation generation means for generating an expiration date for validating the slot allocation information,
The activation generation means generates an expiration date of the slot allocation information every time the slot allocation information is updated ,
The transmitting means transmits the activation deadline;
The communication system according to claim 1, wherein the plurality of child nodes set the predetermined time based on the transmitted expiration date.

The parent node further includes detection means for detecting a child node whose communication is restricted by the restriction means ,
When detecting a child node that restricts communication, the transmission means transmits the slot allocation validation information to the child node,
The plurality of child nodes further include resuming means for resuming the restricted communication,
Wherein said reproducing means child nodes has restricted communications, said upon receiving the slot allocation activation information from the parent node, a communication system according to claim 1, characterized in that makes resume communication.

The child node further includes slot allocation validation request means for requesting retransmission of the slot allocation validation information,
The slot allocation validation request means transmits a slot allocation validation request to the parent node after the local node restricts communication ,
The communication system according to claim 1, wherein the transmission unit of the parent node transmits the slot allocation validation information in response to the slot allocation validation request from the child node.

The parent node further includes identifier generating means for generating an identifier of the slot allocation information,
The identifier generating means generates an identifier of the different slot allocation information each time the slot allocation information is updated, and adds it to the slot allocation information.
The plurality of child nodes further include resuming means for resuming the restricted communication ,
The restarting means transmits the child node when the identifier of the slot assignment information received before the node restricts communication matches the identifier of the slot assignment information received after restricting the communication. The communication system according to claim 1, wherein the communication system is resumed.

The generating means generates the slot allocation information in which a slot for retransmission is allocated at a predetermined position,
The communication system according to any one of claims 1 to 6, wherein the parent node and the plurality of child nodes perform communication using a slot for the retransmission.

A control method for a communication system that includes one parent node and a plurality of child nodes, and performs communication by assigning a frame to a plurality of communication slots based on slot assignment information generated by the parent node,
The parent node is
Generating step for generating the slot allocation information;
A response receiving step of receiving confirmation responses from the plurality of child nodes after transmitting the slot allocation information;
A step of transmitting slot assignment validation information for validating the slot assignment information upon reception of the confirmation response to the plurality of child nodes;
The plurality of child nodes are:
When receiving the slot allocation information transmitted from the parent node, a response transmission step of transmitting an acknowledgment to the parent node ;
Receiving the slot allocation validation information; and
Control method for a communication system, characterized in that to perform a limiting step of limiting a communication when the constant time Tokoro is unable to receive the slot allocation activation information from the parent node until elapse.