Apparatus for allocating transmission period in a wireless communication system

• US 7,688,768 B2
• Filed: 10/17/2006
• Issued: 03/30/2010
• Est. Priority Date: 10/18/2005
• Status: Active Grant

• Current Assignee: Sisvel International S.A. (Fineur International S.A.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jang, Kyung-Hun, Lee, Dong-Jun, Hwang, Hyo-Sun, Kim, Young-Soo, Park, Jong-Ae
• Primary Examiner(s): Afshar; Kamran
• Assistant Examiner(s): Fahnert; Marisol
• Application Number:
  US11/581,941
• Publication Number:
  US 20070086374A1
• Time in Patent Office: 1,260 Days
• Field of Search: 455/458, 455/574, 455450-454, 455509-517, 455/522, 455/69, 370/311, 370/318, 370/328, 370/338, 370/329, 370/341
• US Class Current: 370/311
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 1/0007 by modifying the frame length
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/26 using explicit feedback to the source, e.g. choke packets
• CPC Class Codes: H04L 47/33 using forward notification
• CPC Class Codes: H04L 47/365 Dynamic adaptation of the packet size
• CPC Class Codes: H04W 28/14 using intermediate storage
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• 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]
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

An apparatus is provided for efficiently allocating a transmission period in a wireless network system. An access point (AP) transmits a PSMP frame indicating a downlink period provided to each station (STA) and a minimum amount of an uplink period allocated to each STA, and at least one sub PSMP frame indicating an uplink period additionally provided for an STA that transmitted a resource request message for remaining queued data in the uplink period indicated by the PSMP frame. If the uplink period indicated by the PSMP frame is insufficient to transmit the queued data, the STA transmits a data unit including a part of the queued data and a resource request message for the remaining queued data in the uplink period. After transmitting the resource request message, the STA receives the sub PSMP frame after the full period indicated by the sub PSMP frame, and transmits the remaining queued data to the AP in the uplink period indicted by the sub PSMP frame.

Claims

1. An access point (AP) apparatus for allocating a transmission period in a frame period in a wireless network system, the apparatus comprising:

a processor which generates a first power save multi-poll (PSMP) frame allocating a downlink period and an uplink period to a station (STA), wherein;

the uplink period is provided for receiving queued data of the STA, and

after the downlink and uplink periods, and in response to a resource request message from the STA requesting allocation of an additional resource, the processor generates a subsequent PSMP frame allocating an additional uplink period to the STA, wherein the subsequent PSMP frame is an additional PSMP frame following the first PSMP frame; and

a transceiver which transmits to the STA the subsequent PSMP after the downlink and uplink periods and receives at least a portion of remaining queued data from the STA during the additional uplink period.

2. The apparatus of claim 1, wherein if the additional uplink period is insufficient for transmitting the remaining queued data by the STA:

the processor generates an additional subsequent PSMP frame allocating an additional uplink period in response to an additional resource request message from the STA; and

the transceiver receives at least an additional portion of the remaining queued data from the STA during the additional uplink period of the additional subsequent PSMP frame.

3. The AP apparatus of claim 1, wherein the uplink period is provided according to at least one of a required minimum data rate and a period required for transmission of a resource request message.

4. The AP apparatus of claim 1, wherein the resource request message comprises at least one of a size field defining the amount of the at least a portion of the remaining queued data and a duration request field defining a required quality of service (QoS).

5. The AP apparatus of claim 1, wherein the subsequent PSMP frame comprises:

an identifier (ID) of the STA;

a start offset indicating a start point of the additional uplink period provided by the subsequent PSMP frame; and

a duration field indicating a duration of the additional uplink period.

6. The AP apparatus of claim 1, wherein the downlink and uplink periods provided by the PSMP frame and the additional uplink period provided by the subsequent PSMP frame are included in one transmission frame period having a fixed length.

7. The AP apparatus of claim 2, wherein the generating of the additional subsequent PSMP frame to receive the at least an additional portion of the remaining queued data is repeated until all of the queued data is received or a preset duration of the frame period expires.

15. The AP apparatus of claim 1, wherein the first PSMP frame comprises:

an identifier (ID) of the STA;

a start offset indicating a start point of the downlink and uplink periods provided by the first PSMP frame; and

a duration field indicating a duration of the downlink and uplink periods provided by the first PSMP frame.

8. An access point (AP) apparatus for allocating a transmission period in a frame period in a wireless network system, the apparatus comprising:

a processor which generates a first power save multi-poll (PSMP) frame allocating a downlink period and an uplink period to a station (STA), wherein the uplink period is provided for queued data of the STA, and

after the downlink and uplink periods, and in response to a resource request message from the STA requesting allocation of an additional resource for at least a portion of remaining queued data of the STA, the processor generates a subsequent PSMP frame allocating an additional uplink period to the STA, wherein the subsequent PSMP frame is an additional PSMP frame to follow the first PSMP frames, in the frame period having a periodic duration; and

a transceiver which transmits to the STA the subsequent PSMP after the downlink and uplink periods and receives the at least a portion of the remaining queued data from the STA during the additional uplink period.

9. The apparatus of claim 8, wherein if the additional uplink period being insufficient for the remaining queued data by the STA:

the processor generates an additional subsequent PSMP frame allocating an additional uplink period in response to an additional resource request message from the STA; and

the transceiver receives at least an additional portion of the remaining queued data from the STA during the additional uplink period of the additional subsequent PSMP frame.

10. The AP apparatus of claim 8, wherein the uplink period is provided according to at least one of a required minimum data rate and a period required for transmission of a resource request message.

11. The AP apparatus of claim 8, wherein the resource request message comprises at least one of a size field defining the amount of the at least a portion of the remaining queued data and a duration request field defining a required quality of service (QoS).

12. The AP apparatus of claim 8, wherein the subsequent PSMP frame comprises:

an identifier (ID) of the STA;

a start offset indicating a start point of the additional uplink period provided by the subsequent PSMP frame; and

a duration field indicating a duration of the additional uplink period.

13. The AP apparatus of claim 8, wherein the downlink and uplink periods provided by the PSMP frame and the additional uplink period provided by the subsequent PSMP frame are included in one transmission frame period having a fixed length.

14. The AP apparatus of claim 9, wherein the generating of the additional subsequent PSMP frame to receive the at least an additional portion of the remaining queued data is repeated until all of the queued data is received or a preset duration of the frame period expires.

16. The AP apparatus of claim 8, wherein the first PSMP frame comprises:

an identifier (ID) of the STA;

a start offset indicating a start point of the downlink and uplink periods provided by the first PSMP frame; and

a duration field indicating a duration of the downlink and uplink periods provided by the first PSMP frame.