Method for allocating transmission period in a wireless communication system

• US 20070086416A1
• Filed: 10/16/2006
• Published: 04/19/2007
• 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. (Samsung Group)
• Inventors: Jang, Kyung-Hun, Lee, Dong-Jun, Hwang, Hyo-Sun, Kim, Young-Soo, Park, Jong-Ae
• Granted Patent: US 7,656,832 B2
• Time in Patent Office: Days
• US Class Current: 370/347
• 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

A method is provided for efficiently allocating a transmission period in a WLAN system. An access point (AP) transmits a PSMP message providing a downlink period and an uplink period provided to each station (STA), and at least one sub PSMP frame indicating a period of at least one of a downlink and an uplink for an STA requiring additional resource allocation. After exchanging data with the AP in the downlink and uplink periods provided by the PSMP frame, if there is a need for additional resource allocation, the STA receives the at least one sub PSMP frame and exchanges data with the AP in the period provided by the each sub PSMP frame.

Claims

1. A method for receiving an allocated transmission period in a frame period in a wireless network system, said frame period having a preset duration, the method comprising the steps of:

receiving a power save multi-poll (PSMP) frame providing a downlink period and an uplink period provided by an access point (AP);

receiving data from the AP in the downlink period provided by the PSMP frame and transmitting data to the AP in the uplink period provided by the PSMP frame;

after expiration of the downlink and uplink periods provided by the PSMP frame, receiving in the frame period at least one sub-PSMP frame providing at least one of an additional downlink period and an additional uplink period; and

receiving data in the additional downlink period provided by the sub-PSMP frame if there is additional data to be received, and transmitting data in the additional uplink period provided by the sub-PSMP frame if there is additional data to be transmitted.

2. The method of claim 1, wherein the PSMP frame comprises:

an identifier (ID) of a station (STA);

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

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

3. The method of claim 1, wherein the downlink period provided by the PSMP frame is provided according to a required data rate.

4. The method of claim 1, wherein each sub-PSMP frame comprises:

an ID of a station (STA);

a start offset indicating a start point of each additional period provided by the sub-PSMP frame; and

a duration field indicating a length of each additional period provided by the sub-PSMP frame.

5. The method of claim 1, wherein all of the periods indicated by the PSMP frame and all of the periods indicated by the at least one sub-PSMP frame are included in one transmission frame period having a fixed length.