COMMUNICATION APPARATUS AND TRANSMISSION DATA GENERATION METHOD

• US 20110188464A1
• Filed: 02/04/2011
• Published: 08/04/2011
• Est. Priority Date: 08/08/2008
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: KUBOTA, Manabu, OBUCHI, Kazuhisa, OKAMOTO, Shinya, SHINOHARA, Chiaki, SOEJIMA, Yoshinori, YAMASAKI, Miki, OTONARI, Akihide
• Granted Patent: US 8,681,670 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04W 28/065 using assembly or disassembly of packets
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/1263 Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A communication apparatus includes an acquisition unit that acquires a size of free space provided in each of a plurality of data transmission units of a first layer; and an allocation unit that allocates to each of a plurality of pieces of data of a second layer a contiguous sequence of free space from among the free space whose size is acquired by the acquisition unit, the contiguous sequence of free space being equal in size to each piece of data and provided in one of the data transmission units among the plurality of data transmission units. The apparatus also includes a multiplexing unit that multiplexes the plurality of pieces of data of the second layer into the plurality of data transmission units of the first layer according to the allocation of the free space by the allocation unit.

Claims

1. A communication apparatus comprising:

an acquisition unit that acquires a size of free space provided in each of a plurality of data transmission units of a first layer;

an allocation unit that allocates to each of a plurality of pieces of data of a second layer a contiguous sequence of free space from among the free space whose size is acquired by the acquisition unit, the contiguous sequence of free space being equal in size to each piece of data and provided in one data transmission unit among the plurality of data transmission units; and

a multiplexing unit that multiplexes the plurality of pieces of data of the second layer into the plurality of data transmission units of the first layer according to the allocation of the free space by the allocation unit.

2. The communication apparatus according to claim 1, wherein the allocation unit allocates the contiguous sequence of free space to the data in descending order of priority when allocating the free space to each of the plurality of pieces of data of the second layer.

3. The communication apparatus according to claim 1, wherein the allocation unit allocates a free space across the plurality of data transmission units to the data when no contiguous sequence of the free space equal in size to one piece of data of the plurality of pieces of data of the second layer is available in one data transmission unit.

4. The communication apparatus according to claim 1, further comprising a plurality of allocation units, each allocation unit allocating a free space to a corresponding one piece of data from among the plurality of pieces of data of the second layer, the free space being allocated from among the free space notified from the acquisition unit, and

the acquisition unit acquires a new free space, each time an allocation unit allocates the free space to a piece of data, by excluding the allocated space from the free space, and the acquisition unit notifies an allocation unit not previously notified of the free space from among the plurality of allocation units, of the new free space.

5. The communication apparatus according to claim 1, wherein the allocation unit includes a layer processing unit provided corresponding to the first layer to decide allocation of the free space to each piece of data based on a collected data amount after collecting the data amount of the plurality of pieces of data of the second layer.

6. The communication apparatus according to claim 1, wherein the acquisition unit acquires the size of the free space of a plurality of data transmission units transmitted from mutually different antennas.

7. The communication apparatus according to claim 1, wherein the acquisition unit acquires the size of the free space of a plurality of data transmission units transmitted in different timing.

8. The communication apparatus according to claim 7, wherein the acquisition unit forecasts channel quality information in the future from the channel quality information to date to estimate the size of the free space in the data transmission units transmitted in the future based on a forecast result of the channel quality information.

9. A computer readable storage medium having stored therein a transmission data generation program for causing a computer to operate as a communication apparatus, the transmission data generation program causing the computer to execute a process comprising:

acquiring a size of free space provided in each of a plurality of data transmission units of a first layer;

allocating to each of a plurality of pieces of data of a second layer a contiguous sequence of free space from among the free space whose size is acquired, the contiguous sequence of free space being equal in size to each piece of data and provided in one of the data transmission units among the plurality of data transmission units; and

multiplexing the plurality of pieces of data of the second layer into the plurality of data transmission units of the first layer according to the allocation of the free space.

10. A transmission data generation method comprising:

acquiring a size of free space provided in each of a plurality of data transmission units of a first layer;

allocating to each of a plurality of pieces of data of a second layer a contiguous sequence of free space from among the free space whose size is acquired, the contiguous sequence of free space being equal in size to each piece of data and provided in one of the data transmission units from among the plurality of data transmission units; and

multiplexing the plurality of pieces of data of the second layer into the plurality of data transmission units of the first layer according to the allocation of the free space.

11. A communication system comprising:

an acquisition unit that acquires a size of free space provided in each of a plurality of data transmission units that can be allocated to pieces of data;

processing unit that allocates to each of a plurality of pieces of data a contiguous sequence of free space from among the free space whose size is acquired by the acquisition unit, the contiguous sequence of free space being equal in size to each piece of data and provided in one data transmission unit among the plurality of data transmission units; and

a multiplexing unit that multiplexes the plurality of pieces of data into the plurality of data transmission units according to the allocation of the free space by the allocation unit.

12. The communication system of claim 11 wherein, when a contiguous sequence of free space being equal in size to a piece of data and provided in one data transmission unit is no longer available, the processing unit further allocates a portion of a piece of data across free space among multiple data transmission units of the plurality of data transmission units.

13. The communication system of claim 11 wherein the processing unit further comprises a plurality of allocation units, each allocation unit allocating a free space to a corresponding one piece of data from among the plurality of pieces of data of a second communication protocol layer, the free space being allocated from among the free space notified from the acquisition unit that is provided in each of a plurality of data transmission units of a first communication protocol layer, and

the acquisition unit acquires a new free space, each time an allocation unit allocates the free space to a piece of data, by excluding the allocated space from the free space, and the acquisition unit notifies an allocation unit not previously notified of the free space from among the plurality of allocation units, of the new free space.

14. The communication system of claim 13, wherein each of the allocation units is notified of the free space in an order of priority of the one piece of data corresponding to the allocation unit, and wherein the acquisition unit acquires the size of the free space from at least one of a plurality of data transmission units transmitted from mutually different antennas and of a plurality of data transmission units transmitted at different timings.