Multiple access communication system and data transceiver
AssigneeNEC Corporation
InventorYukinori Suda
Life of this patent
Estimating the term…
Abstract
A multiple access communications system achieving an improvement in transmission efficiency is disclosed. A slave station receives data from variable speed data terminals and generates a plurality of data packets. The slave station then transmits a transmission request packet containing a total amount of data packets to be concatenated to a master station. The master station transmits a transmission permission packet containing a total amount of data packets permitted to be concatenated through a broadcast line to the slave station. The slave station concatenates a plurality of uplink transmission data packets within a predetermined range, and transmits a concatenated uplink transmission data packet to the master station through the multiple access line network.
Claims9
1-6. (canceled)
A multiple access communications system comprising:
- a master station;
- and
- a plurality of slave stations, each of which is connected to the master station using an uplink and a downlink and is connected to at least one fixed speed data terminal, wherein the master station comprises a time synchronization packet transmitter for transmitting a time synchronization packet to the slave stations to obtain time synchronization with the slave stations, and
- each of the slave stations comprises:
- a converter for converting all fixed speed data received from the at least one fixed speed data terminal to uplink transmission data packets in synchronization with the time synchronization packet, and
- a transmitter for starting transmission processing of the uplink transmission data packets when the fixed speed data from all of the at least one fixed speed data terminal have been stored.
The multiple access communications system according to claim 1, wherein each of the slave stations further comprises:
- a detector for detecting at least one fixed speed data terminal that is in an active state,
- wherein the transmitter starts the transmission processing of the uplink transmission data packets when the fixed speed data from all of the at least one fixed speed data terminal that is in the active state has been stored.
The multiple access communication system according to claim 1, wherein the master station periodically transmits a transmission permission packet to the slave stations,
- wherein the converter converts the fixed speed data to uplink transmission data packets in synchronism with the transmission permission packet, and the transmitter performs transmission of the uplink transmission data packets according to timing designated by the transmission permission packet.
10-14. (canceled)
A data transceiver connected between a master station and at least one fixed speed data terminal to transfer data between the master station and the at least one terminal, comprising:
- a packet data generator for generating uplink transmission data packets from fixed speed data received from the at least one fixed speed data terminal, in synchronization with a time synchronization packet received from the master station to;
- and
- a data packet transmitter for performing transmission processing of the uplink transmission data packets when the fixed speed data from all of the at least one fixed speed data terminal have been received.
16-17. (canceled)
A method for transferring data between a master station and at least one fixed speed data terminal, comprising the steps of:
- generating uplink transmission data packets from fixed speed data received from the at least one fixed speed data terminal, in synchronization with a time synchronization packet received from the master station to;
- and
- performing transmission processing of the uplink transmission data packets when the fixed speed data from all of the at least one fixed speed data terminal have been received.
19-25. (canceled)
Dependencies are inferred from the claim text.