Wireless Internet Terminal and Packet Transmission Method for Improving Quality of Service

• US 20080267140A1
• Filed: 09/22/2004
• Published: 10/30/2008
• Est. Priority Date: 12/22/2003
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute, Hanaro Telecom., Inc., KT Corporation, Samsung Electronics Co. Ltd., SK Telecom Co., Ltd.
• Original Assignee: Samsung Electronics Limited (Samsung Electronics Co. Ltd.)
• Inventors: Ahn, Jee-Hwan, Park, Nam-Hoon, Lee, Seung-Que, Cho, Choong-Ho
• Granted Patent: US 8,588,189 B2
• Time in Patent Office: Days
• US Class Current: 370/337
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/2416 Real-time traffic
• CPC Class Codes: H04L 47/2433 Allocation of priorities to traffic types
• CPC Class Codes: H04L 47/2441 relying on flow classification, e.g. using integrated services [IntServ]
• CPC Class Codes: H04L 47/2458 Modification of priorities while in transit
• CPC Class Codes: H04L 47/2466 using signalling traffic
• CPC Class Codes: H04L 47/28 in relation to timing considerations
• CPC Class Codes: H04L 47/32 by discarding or delaying data units, e.g. packets or frames
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 28/065 using assembly or disassembly of packets
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS
• CPC Class Codes: H04W 72/569 of the traffic information
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

Disclosed are a terminal of an OFDMA-TDMA wireless Internet system capable of reducing transmission delay time a packet transmission method. A MAC layer of the terminal is divided into a MAC software part and a MAC hardware part to control priorities of data packets at a high level and low level. The high level priority controller carries out various fine control operations according to a QoS policy and the low level priority controller performs mechanical control operations based on a predetermined simple fixed priority policy.

Claims

1. An OFDMA-TDMA (Orthogonal Frequency Division Multiplex—

Time Division Multiple Access) based wireless Internet terminal comprising;

a QoS profile storing information about a QoS policy;

a classifier for classifying data packets to be transmitted according to the QoS policy;

a first module including a first priority controller that gives priorities to the classified data packets according to the QoS policy;

a PDU maker for generating PDUs from the data packets given the priorities;

a second priority controller for determining priorities of the PDUs according to a predetermined policy; and

a second module arranging the PDUs in an allocated bandwidth to transmit the PDUs.

2. The OFDMA-TDMA based wireless Internet terminal as claimed in claim 1, wherein the first module further includes an admission controller that determines admission or discard of the data packets classified by the classifier.

3. The OFDMA-TDMA based wireless Internet terminal as claimed in claim 2, wherein the first module further includes a QoS queue storing the data packets classified by the classifier, and a priority queue storing data packets admitted by the admission control based on their priorities.

4. The OFDMA-TDMA based wireless Internet terminal as claimed in claim 3, wherein the first module is constructed in a MAC layer by software.

5. The OFDMA-TDMA based wireless Internet terminal as claimed in claim 1, wherein the second module includes a sorting queue sequentially storing the PDUs based on priorities assigned by the second priority controller.

6. The OFDMA-TDMA based wireless Internet terminal as claimed in claim 5, wherein the PDUs are MAC PDUs, and the second priority controller gives priories to the MAC PDUS in the order of an ACK packet, a management message packet and a user data packet independently from the QoS profile.

7. The OFDMA-TDMA based wireless Internet terminal as claimed in claim 6, wherein the second module is constructed in a MAC layer by hardware.

8. A packet processing method in a wireless Internet terminal, comprising:

classifying and storing data packets based on a QoS policy;

providing first priories to the data packets classified based on the QoS policy;

storing the data packets given the first priorities in a queue and sequentially outputting the data packets based on their priories;

providing second priorities to the data packets based on characteristics of the data packets independently of the QoS policy; and

sequentially sorting the data packets based on the second priorities to arrange the data packets in an allocated bandwidth.

9. The packet processing method as claimed in claim 8, further comprising determining admission or discard of the classified data packets.

10. The packet processing method as claimed in claim 9, wherein the classifying and storing data packets, determining admission or discard of the classified data packets and giving first priories to the classified data packets are executed by software, and the giving second priorities to the data packets and the arranging the data packets are executed by hardware.

11. A recording medium storing a program used for a wireless terminal that gives first priories to data packets based on a QoS policy, gives second priories to the data packets based on packet information of the data packets given the first priories and uplink-transmits the data packets, the recording medium comprising:

storing the QoS policy as a QoS profile;

classifying and storing the data packets based on the QoS policy;

determining admission or discard of the classified data packets; and

providing the first priorities to data packets allowed to be admitted according to the QoS policy.