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.
Claims20
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 a multiple access controlled uplink and a broadcasting downlink and is connected to at least one terminal, wherein each of the slave stations comprises:
- a transmission buffer for storing data received from a terminal as uplink transmission packets;
- a condition memory storing a transmission condition for packet concatenation;
- a packet concatenation section for concatenating a plurality of uplink transmission packets stored in the transmission buffer within a range satisfying the transmission condition, to produce a concatenated uplink transmission packet;
- and
- a transmitter for transmitting the concatenated uplink transmission packet to the master station.
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.
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 a multiple access controlled uplink and a broadcasting downlink and is connected to at least one terminal, wherein each of the slave stations transmits an uplink data packet and an uplink control information packet to the master station as an uplink transmission data packet, wherein each of the slave station comprise:
- a first buffer for storing uplink transmission data packets;
- a second buffer for storing uplink transmission data packet status information indicating a status of each of the uplink transmission data packets;
- and
- a buffer controller controlling such that, when an uplink transmission data packet is stored in the first buffer, a control flag is set to not-changeable and is added to uplink transmission data packet status information corresponding to the uplink transmission data packet, and the uplink transmission data packet status information with the control flag set to not-changeable is stored in the second buffer.
A data transceiver connected between a master station and at least one terminal to transfer data between the master station and the at least one terminal, comprising:
- a transmission buffer for storing data received from a terminal as uplink transmission packets;
- a condition memory storing a transmission condition for packet concatenation;
- a packet concatenation section for concatenating a plurality of uplink transmission packets stored in the transmission buffer within a range satisfying the transmission condition, to produce a concatenated uplink transmission packet;
- and
- a transmitter for transmitting the concatenated uplink transmission packet to the master station.
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.
A data transceiver connected between a master station and at least one terminal to transfer data between the master station and the at least one terminal, comprising:
- a first buffer for storing uplink transmission data packets;
- a second buffer for storing uplink transmission data packet status information indicating a status of each of the uplink transmission data packets;
- and
- a buffer controller controlling such that when an uplink transmission data packet is stored in the first buffer, a control flag is set to not-changeable and is added to uplink transmission data packet status information corresponding to the uplink transmission data packet, and the uplink transmission data packet status information with the control flag set to not-changeable is stored in the second buffer.
A method for transferring data between a master station and at least one fixed speed data terminal, comprising the steps of:
- storing data received from a terminal as uplink transmission packets;
- concatenating a plurality of uplink transmission packets stored in the transmission buffer within a range satisfying a transmission condition for packet concatenation, to produce a concatenated uplink transmission packet;
- and
- transmitting the concatenated uplink transmission packet to the master station.
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.
A method for transferring data between a master station and at least one terminal, comprising the steps of:
- storing uplink transmission data packets in a first buffer;
- storing uplink transmission data packet status information indicating a status of each of the uplink transmission data packets in a second buffer;
- when an uplink transmission data packet is stored in the first buffer, setting a control flag to not-changeable and adding it to uplink transmission data packet status information corresponding to the uplink transmission data packet;
- and
- storing the uplink transmission data packet status information with the control flag set to not-changeable in the second buffer.
A multiple access communication method between 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 terminal, comprising the steps of:
- at a slave stations
- generating a plurality of data packets from data received from the at least one terminal;
- transmitting a transmission request packet containing a total amount of data packets to be concatenated to the master station;
- at the master station,
- in response to the transmission request packet, transmitting a transmission permission packet containing a total amount of data packets permitted to be concatenated to the slave station;
- at the slave station,
- concatenating a plurality of uplink transmission data packets within a predetermined range to produce a concatenated uplink transmission data packet;
- and
- transmitting the concatenated uplink transmission data packet to the master station.
Dependencies are inferred from the claim text.