TDMA communications apparatus
AssigneeFuruno Electric Co., Ltd.
InventorsYasushi Hiraoka, Kazuhiko Nobunaga
Life of this patent
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Abstract
If own station detects that a slot S2 previously reserved for own transmission has been occupied by another station when transmitting a message at a current slot S3, the own station sets the occupied slot to a time-out value of zero S0 upon transmitting the message at the current slot S3. At the same time, the own station re-reserves a new slot S5 within an SI in a succeeding frame so that transmission from the own station at the new slot S5 does not conflict with transmission from the other station at the occupied slot, now reserved by other station as slot A.
Claims7
A TDMA communications apparatus for carrying out communication using TDMA technology in which a frame is divided into a plurality of slots, a slot being treated as a unit of data transmission, and said TDMA communications apparatus performs TDMA communication while reserving slots for own transmission, said TDMA communications apparatus comprising:
- conflict avoidance means for avoiding slot allocation conflicts with other stations by transmitting a message indicating that own station will re-reserve another slot for own transmission within a predefined period upon detecting that a slot reserved for own use has been reserved by another station as well.
A TDMA communications apparatus for carrying out communication using TDMA technology in which a frame is divided into a plurality of slots, a slot being treated as a unit of data transmission, and said TDMA communications apparatus performs TDMA communication while reserving slots for own transmission, said TDMA communications apparatus comprising:
- means for evaluating the level of a signal received in each slot a plurality of times and judging a slot in which the level of the received signal is less than a threshold a specific number of times as a free slot which may be reserved for own transmission without causing a conflict with other stations.
A TDMA communications apparatus for carrying out communication using TDMA technology in which a frame is divided into a plurality of slots, a slot being treated as a unit of data transmission, and said TDMA communications apparatus performs TDMA communication while reserving slots for own transmission, said TDMA communications apparatus comprising:
- a violation information memory for storing violations of individual protocols, such as slot allocation-related violations and transmission-related violations of individual stations, in a manner that allows a comparison between the content of a slot allocation table and/or database of other stations storing slot allocation status of each station and received messages.
A TDMA communications apparatus for carrying out communication using TDMA technology in which a frame is divided into a plurality of slots, a slot being treated as a unit of data transmission, and said TDMA communications apparatus performs TDMA communication while reserving slots for own transmission, said TDMA communications apparatus comprising:
- means for recovering a report rate by allocating a new slot within a defined next selection interval(SI) using ITDMA protocol when the communication apparatus detects that the own slot within the next SI has been erased or overridden by other stations or is not found due to a traffic situation.
Dependencies are inferred from the claim text.