Sending Station, Relay Station, And Relay Method
First Claim
1. A relay station for receiving a packet transmitted from a sending station and relaying said packet to a receiving station, comprising:
- packet receiver configured to receive a packet fragmented in said sending station;
packet fragmenting unit configured to selectively further refragment said packet received by said packet receiver into a plurality of refragmented packets;
controller configured to add identification information to each of said refragmented packets and to a packet not refragmented in said packet fragmenting unit; and
packet transmitting unit configured to transmit to said receiving station each of said packets to which said identification information has been added by said controller.
1 Assignment
0 Petitions
Accused Products
Abstract
In a relay station, a packet fragmented by a sending station is received. The fragmented packet is selectively further fragmented into a plurality of refragmented packets. Identification information (FSN) is added to each of the refragmented packets and to a non-refragmented packet not fragmented. Each of the packets to which the identification information (FSN) has been added is transmitted to a receiving station. This makes it possible to prevent a confliction of information (FSN) between packets due to the packet refragmentation in the relay station.
27 Citations
17 Claims
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1. A relay station for receiving a packet transmitted from a sending station and relaying said packet to a receiving station, comprising:
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packet receiver configured to receive a packet fragmented in said sending station; packet fragmenting unit configured to selectively further refragment said packet received by said packet receiver into a plurality of refragmented packets; controller configured to add identification information to each of said refragmented packets and to a packet not refragmented in said packet fragmenting unit; and packet transmitting unit configured to transmit to said receiving station each of said packets to which said identification information has been added by said controller. - View Dependent Claims (2, 3, 4, 5)
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6. A relay station for receiving a packet transmitted from a sending station and relaying said packet to a receiving station, comprising:
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packet receiver configured to receive a fragmented packet which contains a fragment of said packet fragmented in said sending station, and also contains control information representing which part of said packet said fragment belongs to before fragmentation; packet fragmenting unit configured to selectively further refragment said packet received by said packet receiver into a plurality of refragmented packets; controller configured to add to said refragmented packets renewed control information which matches with said control information added before the refragmentation, based on said control information; and packet transmitter configured to transmit said refragmented packets to which said renewed control information has been added, and the packet not refragmented by said packet fragmenting unit, to said receiving station. - View Dependent Claims (7, 8)
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9. A sending station for transmitting a packet to a relay station that receives said packet and relays said packet to a receiving station, comprising:
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packet fragmenting unit configured to fragment a packet into a plurality of blocks that are used as a unit of fragmentation in said relay station; controller configured to add identification information to each of said blocks fragmented by said packet fragmenting unit; packet packing unit configured to pack some of said blocks to which said identification information has been added; and packet transmitter configured to transmit the packets packed by said packet packing unit to said relay station. - View Dependent Claims (10, 11, 12)
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13. A relay station for receiving a packet transmitted by a sending station and relaying said packet to a receiving station, comprising:
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packet receiver for receiving as a packet a plurality of blocks which have been fragmented in said sending station, assigned identification information, packed into one, and transmitted by said sending station; packet fragmenting unit which, if it is necessary to fragment and transmit said packet received by said packet receiver to said receiving station, separates said packet into said plurality of blocks to generate a plurality of fragmented packets; and packet transmitter configured to transmitting to said receiving station said plurality of fragmented packets generated by said packet fragmenting unit. - View Dependent Claims (14)
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15. A relay method for use in a relay station that receives a packet transmitted from a sending station and relays said packet to a receiving station, comprising the steps of:
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receiving a packet fragmented in said sending station; selectively further fragmenting said fragmented packet into a plurality of refragmented packets; adding identification information to each of the refragmented packets and to a non-refragmented packet not fragmented; and transmitting to said receiving station each of said packets to which said identification information has been added.
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16. A relay method for use in a relay station that receives a packet transmitted from a sending station and relays said packet to a receiving station, comprising the steps of:
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receiving a fragmented packet which contains a fragment of said packet fragmented in said sending station, and also contains control information representing which part of said packet said fragment belongs to before fragmentation; selectively further refragmenting said fragmented packet into a plurality of refragmented packets; adding to said refragmented packets renewed control information which matches with said control information added before the refragmentation, based on said control information; and transmitting said refragmented packets to which said renewed control information has been added, and a packet not refragmented, to said receiving station.
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17. A relay method for a relay station to receive a packet transmitted from a sending station and relay said packet to a receiving station,
wherein said sending station fragments a packet into a plurality of blocks that are used as a unit of fragmentation in said relay station; -
adds identification information to each of said plurality of blocks; packs some of said blocks to which said identification information has been added; and transmits the packed packet to said relay station, and wherein said relay station receives the packet from said sending station; if it is necessary to fragment and transmit said received packet to said receiving station, separates said packet into said plurality of blocks to generate a plurality of fragmented packets; and transmits said plurality of fragmented packets to said receiving station.
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Specification