Packet communication system, network-side apparatus to be used therein, and time slot allocation control method

A packet communication system, wherein plural terminal-side apparatus and a network-side apparatus are connected, sharing physical media, said network-side apparatus allocating time slots to at least one said terminal-side apparatus, and said terminal-side apparatus transferring packets to the physical media by using said time slots, each of said terminal-side apparatus comprising:

• a buffer means for storing packets input from plural terminals connected and a packet number report means which monitors the number of packets presently stored in said buffer means and reports said packet number information to said network-side apparatus, and said network-side apparatus comprising a time slot allocation control means for allocating time slots to each said terminal-side apparatus on the basis of stored packet information from the packet number report means of said terminal devices, and said time slot allocation control means allocates time slots by allocating time slots so that the variance of the stored packet number minus the number of time slots allocated to each may be minimized.

A packet communication system, wherein plural terminal-side apparatus and a network-side apparatus are connected, sharing physical media, said network-side apparatus allocating time slots to at least one of said terminal-side apparatus, and said terminal-side apparatus transferring packets to the physical media by using said time slots, each of said terminal-side apparatus comprising:

• a buffer means for storing packets input from plural terminals connected and a packet number report means which monitors the number of packets presently stored in said buffer means and reports said packet number information to said network-side apparatus, and said network-side apparatus comprising a time slot allocation control means for allocating time slots to each said terminal-side apparatus on the basis of stored packet information from the packet number report means of said terminal device, and said time slot allocation control means divides the total time slots allocated for said terminal-side apparatus into time slot groups, allocating time slots so that in each said time slot group, the stored packet number in said terminal-side apparatus minus the number of time slots allocated to each may approach a specified value, adding each said allocated time slot in each said terminal-side apparatus to determine the allocated time slots in said terminal-side apparatus.

A packet communication system, wherein plural terminal-side apparatus and a network-side apparatus are connected, sharing physical media, said network-side apparatus allocating time slots to at least one said terminal-side apparatus, and said terminal-side apparatus transferring packets to the physical media by using said time slots, each of said terminal-side apparatus comprising:

• a buffer means for storing packets input from plural terminals connected and a packet number report means which monitors the number of packets presently stored in said buffer means and reports said packet number information to said network-side apparatus, and said network-side apparatus comprising a time slot allocation control means for allocating time slots to each said terminal-side apparatus on the basis of stored packet information from the packet number report means of said terminal devices, and said time slot allocation control means divides the total time slots allocated for said terminal-side apparatus into time slot groups, allocating time slots so that in each said time slot group, the variance of the stored packet number in said terminal-side apparatus minus the number of time slots allocated to each may be minimized, adding each of said allocated time slots in each said terminal-side apparatus to determine the allocated time slots in said terminal-side apparatus.

A network-side apparatus wherein it is provided with a stored packet number management table which manages the stored packet number information reported from plural terminal-side apparatus and updates the stored packet number information under management when new packet number information is reported from each said terminal-side apparatus, a circuit for determining terminal-side apparatus for allocation, which gets the stored packet information of each said terminal device with reference to said stored packet number management table when timing arrives for changing time slot allocation and limits terminal-side apparatus for allocation on the basis of the acquired stored packet number information, and a time slot allocation control circuit which when the information of the terminal-side apparatus for allocation is received from said circuit for determining terminal-side apparatus for allocation, gets the stored packet number information of the terminal-side apparatus for allocation with reference to said stored packet number management table, allocates time slots to the terminal-side apparatus for allocation based on the acquired stored packet number information, and reports the allocated time slot information to the terminal-side apparatus.

A time slot allocation control method wherein plural terminal-side apparatus and network-side apparatus are connected sharing physical media and said network-side apparatus determines the time slot numbers allocated to said terminal-side apparatus, said terminal-side apparatus seek the stored packet numbers in terminal-side apparatus, and said network-side apparatus seeks the time slot numbers for allocation, and time slots are so allocated that said stored packet number minus the time slot number allocated to each may approach a specified value.

A time slot allocation control method wherein plural terminal-side apparatus and a network-side apparatus are connected, sharing physical media and said network-side apparatus determines the time slot numbers allocated to said terminal-side apparatus, and said terminal-side apparatus seek the stored packet numbers in the terminal-side apparatus, and said network-side apparatus seeks the time slot numbers, and time slots are so allocated that the variance of said stored packet numbers minus the time slot numbers allocated to each may be minimized.

A time slot allocation control method wherein plural terminal-side apparatus and network-side apparatus are connected, sharing physical media, said network-side apparatus determining the time slot numbers allocated to said terminal-side apparatus, said terminal-side apparatus seek the stored packet numbers of terminal-side apparatus, and said network-side apparatus seeks the time slot numbers, and the total time slots are divided into plural time slot groups, and in each said time slot group, time slots are so allocated that the stored packet number of said terminal-side apparatus minus the time slot number allocated to each may approach a specified value, and the allocated time slots for said terminal-side apparatus are determined by adding each said time slot allocated to each said terminal device.

A time slot allocation control method wherein plural terminal-side apparatus and network-side apparatus are connected, sharing physical media, said network-side apparatus determining the time slot number allocated to said terminal-side apparatus, said terminal-side apparatus seek the stored packet numbers of terminal-side apparatus, and said network-side apparatus seeks the time slot numbers, and the total time slots are divided into plural time slot groups, and in each said time slot group, time slots are so allocated that the variance of the stored packet numbers of said terminal-side apparatus minus the time slot numbers allocated to each may be minimized, and the allocated time slots for said terminal-side apparatus are determined by adding each said time slot allocated to each said terminal device.

A time slot allocation control method wherein plural terminal-side apparatus and network-side apparatus are connected, sharing physical media, said network-side apparatus determining the time slot number allocated to said terminal-side apparatus, said terminal-side apparatus seek the stored packet numbers of terminal-side apparatus, and said network-side apparatus seeks the time slot numbers, and the total time slots are divided into plural time slot groups, and in at least one of said time slot groups, time slots are so allocated that stored packet number of said terminal-side apparatus minus the time slot number allocated to each may approach a specified value, and in the other time slot groups of said time slot groups, time slots are so allocated that the variance of stored packet numbers of said terminal-side apparatus minus the time slot numbers allocated to each may be minimized, and the allocated time slots for said terminal-side apparatus are determined by adding each said time slot allocated to each said terminal device.