Communication apparatus, communication system, and communication control program

• US 7,924,805 B2
• Filed: 04/21/2005
• Issued: 04/12/2011
• Est. Priority Date: 04/23/2004
• Status: Active Grant

• Current Assignee: Palmira Wireless AG
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Takeda, Daisuke, Takagi, Masahiro, Adachi, Tomoko, Utsunomiya, Yoriko, Nishibayashi, Yasuyuki, Nakajima, Tetsu
• Primary Examiner(s): Ngo; Ricky
• Assistant Examiner(s): PATEL, CHANDRAHAS B
• Application Number:
  US11/110,936
• Publication Number:
  US 20050238016A1
• Time in Patent Office: 2,182 Days
• Field of Search: 370/469, 370/338, 370/463, 370/471, 370/445, 370/462, 370/346
• 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 having a generating which generates a single physical frame for transmission and reception. The physical frame includes a first Quality of Service (QoS) data frame, a second Quality of Service (QoS) data frame, and a transmission request for requesting transmission of first acknowledgement information corresponding to the first QoS data frame and second acknowledgement information corresponding to the second QoS data frame. The communication apparatus includes a transmitting unit configured to transmit the physical frame and a receiving unit configured to receive acknowledgment information including a reception of the physical frame transmitted.

Claims

1. A communication apparatus, comprising:

a generating unit configured to generate a single physical frame including, a first data frame with a first traffic identifier for identifying a first priority thereof,

a second data frame with a second traffic identifier for identifying a second priority thereof, wherein the first traffic identifier and the second traffic identifier are different from each other, and

at least a transmission request for requesting transmission of first acknowledgement information corresponding to the first data frame and second acknowledgement information corresponding to the second data frame;

a transmitting unit configured to transmit the physical frame generated by the generating unit in a first communication period given by a polling frame; and

a receiving unit configured to receive the first and second acknowledgement information including a reception state of the physical frame transmitted in a second communication period given by a polling frame,

wherein the transmission request includes information for determining respective start sequence numbers of the first and second data frames to be acknowledged back to the transmitting unit, and

wherein the transmission request includes Block Ack starting sequence control fields corresponding to each of the first and second traffic identifiers, from which a reception status is required.

2. The apparatus according to claim 1, wherein the first data frame and the second data frame are arranged before the transmission request.

3. The apparatus according to claim 1, wherein the receiving unit is configured to receive said single physical frame including:

said first acknowledgement information with respect to the first data frame with the first traffic identifier; and

said second acknowledgement information with respect to the second data frame with the second traffic identifier.

4. The apparatus according to claim 1, wherein the transmission request includes Block Ack starting sequence control fields corresponding to each of the first and second traffic identifiers, from which a reception status is required.

5. The apparatus according to claim 1, wherein said respective start sequence numbers of the first and second data frames to be acknowledged back to the transmitting unit comprise:

a first frame transmission number in a consecutive sequence of the first and second data frames; and

a second frame transmission number in the consecutive sequence of the first and second data frames,

wherein the first frame transmission number is an initial frame in said consecutive sequence of the first data frames and the second frame transmission is an initial frame in said consecutive sequence of the second data frames.

6. A communication apparatus comprising:

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

a transmitting unit configured to transmit a single physical frame in which first acknowledgement information with respect to the first data frame corresponding to the first traffic identifier and second acknowledgement information with respect to the second data frame corresponding to the second traffic identifier are aggregated together with information for determining respective start sequence numbers of the first and second data frames to be acknowledged back to the transmitting unit, wherein the single physical frame is transmitted in a second communication period given by a polling frame.

7. The apparatus according to claim 6, wherein the first and second acknowledgement information are acknowledgement information for selective repeat.

8. The apparatus according to claim 6, wherein said respective start sequence numbers of the first and second data frames to be acknowledged back to the transmitting unit comprise:

a first frame transmission number in a consecutive sequence of the first and second data frames; and

a second frame transmission number in the consecutive sequence of the first and second data frames,

wherein the first frame transmission number is an initial frame in said consecutive sequence of the first data frames and the second frame transmission is an initial frame in said consecutive sequence of the second data frames.

9. A communication apparatus, comprising:

a generating unit configured to generate a single physical frame including,

a first data frame with a first traffic identifier for identifying a first priority thereof,

a second data frame with a second traffic identifier for identifying a second priority thereof, wherein the first traffic identifier and the second traffic identifier are different from each other, and

at least a transmission request for requesting transmission of first acknowledgement information corresponding to the first data frame and second acknowledgement information corresponding to the second data frame;

a transmitting unit configured to transmit the physical frame generated by the generating unit in a first communication period given by a polling frame; and

a receiving unit configured to receive the first and second acknowledgement information in a second communication period given by a polling frame, the first and second acknowledgement information including a reception state of the physical frame transmitted,

wherein

the transmission request includes information for determining respective start sequence numbers of the first and second data frames to be acknowledged back to the transmitting unit,

said respective start sequence numbers of the first and second data frames to be acknowledged back to the transmitting unit comprise a first frame transmission number in a consecutive sequence of the first and second data frames and a second frame transmission number in the consecutive sequence of the first and second data frames, and

the first frame transmission number is an initial frame in said consecutive sequence of the first data frames and the second frame transmission is an initial frame in said consecutive sequence of the second data frames.