Communication apparatus, communication system and communication control program

• US 8,228,889 B2
• Filed: 09/25/2006
• Issued: 07/24/2012
• Est. Priority Date: 04/23/2004
• Status: Active Grant

• Current Assignee: Palmira Wireless AG
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Nishibayashi, Yasuyuki, Takagi, Masahiro, Adachi, Tomoko, Nakajima, Tetsu, Utsunomiya, Yoriko, Takeda, Daisuke
• Primary Examiner(s): Patel, Chandrahas
• Application Number:
  US11/525,994
• Publication Number:
  US 20070014237A1
• Time in Patent Office: 2,129 Days
• Field of Search: 370/469, 370/338, 370/346, 370/463, 709/250, 709/230
• US Class Current: 370/346
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1835 Buffer management
• CPC Class Codes: H04L 47/24 Traffic characterised by specific attributes, e.g. priority or QoS
• CPC Class Codes: H04L 47/27 Evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets
• CPC Class Codes: H04L 47/28 in relation to timing considerations
• CPC Class Codes: H04L 47/34 ensuring sequence integrity, e.g. using sequence numbers
• CPC Class Codes: H04L 49/90 Buffering arrangements
• CPC Class Codes: H04L 49/9094 Arrangements for simultaneous transmit and receive, e.g. simultaneous reading/writing from/to the storage element
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/10 Flow control between communication endpoints
• CPC Class Codes: H04W 74/0816 with collision avoidance
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A communication apparatus which generates a single physical frame including a plurality of MAC frames, and which transmits the physical frame. The physical frame has variable-length bitmap information which includes bits corresponding to the plurality of MAC frames, respectively, and length information of the bitmap information. The communication apparatus can include a transmission scheme selecting device configured to select a transmission scheme of the physical frame to be transmitted as a response to the polling frame from a plurality of candidates in such a manner as to adapt to a channel estimate result estimated by the channel estimating device. The transmission scheme in this arrangement includes at least one of a modulation scheme and a coding ratio.

Claims

1. A communication apparatus, comprising:

a generator configured to generate a single first physical frame including a first data with a first traffic identifier for identifying a first priority of the first data and a second data with a second traffic identifier for identifying a second priority of the second data, wherein the first traffic identifier and the second traffic identifier are different from each other;

a transmitter configured to transmit the first physical frame in a communication period given by a polling frame; and

a receiver configured to receive a first acknowledgement information and a second acknowledgement information in a communication period given by a polling frame, the first acknowledgement information corresponding to the first traffic identifier and including a first reception state of at least the first data, the second acknowledgement information corresponding to the second traffic identifier and including a second reception state of at least the second data,

wherein

the receiver is configured to receive a single second physical frame including both the first acknowledgement information and the second acknowledgement information,

the second physical frame includes a MAC header, the first acknowledgement information, the second acknowledgement information, and a first frame check sequence,

the first acknowledgement information includes a first starting sequence number and a first bitmap, the first starting sequence number corresponding to the first traffic identifier, the first bitmap indicating at least the first reception state corresponding to the first traffic identifier, and

the second acknowledgement information includes a second starting sequence number and a second bitmap, the second starting sequence number corresponding to the second traffic identifier, the second bitmap indicating at least the second reception state corresponding to the second traffic identifier.

2. The apparatus according to claim 1,

wherein the first traffic identifier is related with a first delay bound for specifying a first maximum amount of time allowed to transmit the first data, and

the second traffic identifier is related with a second delay bound for specifying a second maximum amount of time allowed to transmit the second data.

3. The apparatus according to claim 1, further comprising a CPU that executes a firmware.

4. The apparatus according to claim 3, wherein the CPU includes at least part of MAC layer function.

5. The apparatus according to claim 1, wherein the generator, transmitter, and receiver are included in a semiconductor device, and

wherein the semiconductor device includes a CPU that executes a firmware.

6. A communication terminal, comprising:

the communication apparatus according to claim 1; and

an antenna,

wherein the transmitter transmits the first physical frame by using the antenna and the receiver receives the first acknowledgement information and the second acknowledgement information by using the antenna.

7. A communication apparatus, comprising:

a generator configured to generate a single first physical frame including a first data with a first traffic identifier for identifying a first priority of the first data and a second data with a second traffic identifier for identifying a second priority of the second data, wherein the first traffic identifier and the second traffic identifier are different from each other;

a transmitter configured to transmit the first physical frame in a communication period given by a polling frame; and

a receiver configured to receive a first acknowledgement information and a second acknowledgement information in a communication period given by a polling frame, the first acknowledgement information corresponding to the first traffic identifier and including a first reception state of at least the first data, the second acknowledgement information corresponding to the second traffic identifier and including a second reception state of at least the second data,

wherein the transmitter is configured to transmit a first acknowledgement request information and a second acknowledgement request information after transmission of the first physical frame in a communication period given by a polling frame, the first acknowledgement request information being for requesting transmission of the first acknowledgement information, the second acknowledgement request information being for requesting transmission of the second acknowledgement information,

wherein the transmitter is configured to transmit a single third physical frame after transmission of the first physical frame in a communication period given by a polling frame, the third physical frame including the first acknowledgement request information and the second acknowledgement request information.

8. The apparatus according to claim 7, wherein the third physical frame including a MAC header, the first acknowledgement request information, the second acknowledgement request information, and a second frame check sequence,

the first acknowledgement request information includes a third starting sequence number corresponding to the first traffic identifier, and

the second acknowledgement request information includes a fourth starting sequence number corresponding to the second traffic identifier.

9. A communication apparatus, comprising:

a generator configured to generate a single first physical frame including a first data with a first traffic identifier for identifying a first priority of the first data and a second data with a second traffic identifier for identifying a second priority of the second data, wherein the first traffic identifier and the second traffic identifier are different from each other;

a transmitter configured to transmit the first physical frame in a communication period given by a polling frame; and

a receiver configured to receive a first acknowledgement information and a second acknowledgement information in a communication period given by a polling frame, the first acknowledgement information corresponding to the first traffic identifier and including a first reception state of at least the first data, the second acknowledgement information corresponding to the second traffic identifier and including a second reception state of at least the second data,

wherein the first physical frame further includes a first acknowledgement request information and a second acknowledgement request information, the first acknowledgement request information being for requesting transmission of the first acknowledgement information, the second acknowledgement request information being for requesting transmission of the second acknowledgement information.

10. The apparatus according to claim 9,

wherein the first data and the second data are arranged before the first acknowledgement request information and the second acknowledgement request information.

11. The apparatus according to claim 9, wherein the first data is arranged before the second data, if a first priority corresponding to the first traffic identifier is higher than a second priority corresponding to the second traffic identifier.

12. A communication method, comprising:

generating a single first physical frame including a first data with a first traffic identifier for identifying a first priority of the first data and a second data with a second traffic identifier for identifying a second priority of the second data, wherein the first traffic identifier and the second traffic identifier are different from each other;

transmitting the first physical frame in a communication period given by a polling frame; and

receiving a first acknowledgement information and a second acknowledgement information in a communication period given by a polling frame, the first acknowledgement information corresponding to the first traffic identifier and including a first reception state of at least the first data, the second acknowledgement information corresponding to the second traffic identifier and including a second reception state of at least the second data; and

receiving a single second physical frame including both the first acknowledgement information and the second acknowledgement information,

wherein

the second physical frame includes a MAC header, the first acknowledgement information, the second acknowledgement information, and a first frame check sequence,

the first acknowledgement information includes a first starting sequence number and a first bitmap, the first starting sequence number corresponding to the first traffic identifier, the first bitmap indicating at least the first reception state corresponding to the first traffic identifier, and

the second acknowledgement information includes a second starting sequence number and a second bitmap, the second starting sequence number corresponding to the second traffic identifier, the second bitmap indicating at least the second reception state corresponding to the second traffic identifier.

13. A communication apparatus, comprising:

a receiver configured to receive a first physical frame in a communication period given by a polling frame, the first physical frame including a first data with a first traffic identifier for identifying a first priority of the first data and a second data with a second traffic identifier for identifying a second priority of the second data, wherein the first traffic identifier and the second traffic identifier are different from each other; and

a transmitter configured to transmit a first acknowledgement information and a second acknowledgement information in a communication period given by a polling frame, the first acknowledgement information corresponding to the first traffic identifier and including a first reception state of at least the first data, the second acknowledgement information corresponding to the second traffic identifier and including a second reception state of at least the second data,

wherein the transmitter is configured to transmit a single second physical frame including both the first acknowledgement information and the second acknowledgement information,

the second physical frame including a MAC header, the first acknowledgement information, the second acknowledgement information, and a first frame check sequence,

the first acknowledgement information includes a first starting sequence number and a first bitmap, the first starting sequence number corresponding to the first traffic identifier, the first bitmap indicating at least the first reception state corresponding to the first traffic identifier, and

the second acknowledgement information includes a second starting sequence number and a second bitmap, the second starting sequence number corresponding to the second traffic identifier, the second bitmap indicating at least the second reception state corresponding to the second traffic identifier.

14. A communication apparatus, comprising:

a receiver configured to receive a first physical frame in a communication period given by a polling frame, the first physical frame including a first data with a first traffic identifier for identifying a first priority of the first data and a second data with a second traffic identifier for identifying a second priority of the second data, wherein the first traffic identifier and the second traffic identifier are different from each other; and

a transmitter configured to transmit a first acknowledgement information and a second acknowledgement information in a communication period given by a polling frame, the first acknowledgement information corresponding to the first traffic identifier and including a first reception state of at least the first data, the second acknowledgement information corresponding to the second traffic identifier and including a second reception state of at least the second data,

wherein the receiver is configured to receive a first acknowledgement request information and a second acknowledgement request information after reception of the first physical frame in a communication period given by a polling frame, the first acknowledgement request information being for requesting transmission of the first acknowledgement information, the second acknowledgement request information being for requesting transmission of the second acknowledgement information.

15. The apparatus according to claim 14, further comprising a CPU that executes a firmware.

16. The apparatus according to claim 14, wherein the CPU includes at least part of MAC layer function.

17. The apparatus according to claim 14, wherein the receiver, and the transmitter are included in a semiconductor device, and

wherein the semiconductor device includes a CPU that executes a firmware.

18. A communication terminal, comprising:

the communication apparatus according to claim 14; and

an antenna,

wherein the receiver receives the first physical frame by using the antenna and the transmitter transmits the first acknowledgement information and the second acknowledgement information by using the antenna.

19. A communication apparatus, comprising:

a receiver configured to receive a first physical frame in a communication period given by a polling frame, the first physical frame including a first data with a first traffic identifier for identifying a first priority of the first data and a second data with a second traffic identifier for identifying a second priority of the second data, wherein the first traffic identifier and the second traffic identifier are different from each other; and

a transmitter configured to transmit a first acknowledgement information and a second acknowledgement information in a communication period given by a polling frame, the first acknowledgement information corresponding to the first traffic identifier and including a first reception state of at least the first data, the second acknowledgement information corresponding to the second traffic identifier and including a second reception state of at least the second data,

wherein the receiver is configured to receive a single third physical frame after reception of the first physical frame in a communication period given by a polling frame, the third physical frame including the first acknowledgement request information and the second acknowledgement request information.

20. The apparatus according to claim 19, wherein the third physical frame including a MAC header, the first acknowledgement request information, the second acknowledgement request information, and a second frame check sequence,

the first acknowledgement request information includes a third starting sequence number corresponding to the first traffic identifier, and

the second acknowledgement request information includes a fourth starting sequence number corresponding to the second traffic identifier.

21. A communication method, comprising:

receiving a first physical frame in a communication period given by a polling frame, the first physical frame including a first data with a first traffic identifier for identifying a first priority of the first data and a second data with a second traffic identifier for identifying a second priority of the second data, wherein the first traffic identifier and the second traffic identifier are different from each other;

transmitting a first acknowledgement information and a second acknowledgement information in a communication period given by a polling frame, the first acknowledgement information corresponding to the first traffic identifier and including a first reception state of at least the first data, the second acknowledgement information corresponding to the second traffic identifier and including a second reception state of at least the second data; and

receiving a first acknowledgement request information and a second acknowledgement request information after reception of the first physical frame in a communication period given by a polling frame, the first acknowledgement request information being for requesting transmission of the first acknowledgement information, the second acknowledgement request information being for requesting transmission of the second acknowledgement information.