Patent ID: 9270483
Filing Date: 2016-02-23
CPC Classification: H04L

Claim Text:
1. A communication management apparatus that manages transmission of data in a network in which a plurality of communication nodes are connected by an Ethernet, the communication management apparatus comprising: a token-frame receiving unit that receives a token frame for acquiring a transmission right of data and determines whether the transmission right is acquired by analyzing the token frame; a token-frame transmitting unit that transmits the token frame which includes (i) first transmission right acquisition determination information indicating a sequence number of a communication node that can acquire the transmission right in a circulation order of the token frame in the network, (ii) second transmission right acquisition determination information indicating a specific number of frames that can be transmitted while the token frame circulates once, wherein the specific number is variable based on subtracting a number of transmitted data frames from a previously set number of transmittable frames, and (iii) information on another communication node that subsequently acquires the transmission right; and a data-frame-communication processing unit that performs reception processing for data frames from other communication nodes and, when the transmission right is acquired, transmits data in a frame unit, wherein