US 6,553,003 B1 · Device and method processing a radio link protocol in a mobile communication system

Abstract

A method for generating sequence numbers for an RLP frame in a mobile communication system is provided. The method includes the steps of generating a sequence number tree having a plurality of nodes each associated with frame information and a data rate; upon receipt of a sequence number request from an RLP controller, reading, at an RLP sequence number generator, frame information for a designated node from the sequence number tree and providing the read frame information to the RLP controller; and upon receipt of the frame information in response to the sequence number request, transmitting and receiving a frame at the RLP controller.

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Claims19

Dependent claims

A method for generating sequence numbers for a radio link protocol (RLP) frame in a mobile communication system, comprising the steps of:

generating a sequence number tree having a plurality of nodes each associated with frame information and an available data rate;
upon receipt of a sequence number request from an RLP controller, reading, at an RLP sequence number generator, frame information for a designated node from the sequence number tree and providing the read frame information to the RLP controller;
and
upon receipt of the frame information in response to the sequence number request, transmitting and receiving a frame at the RLP controller.

1 more element

A device for generating a sequence number for an RLP frame in a mobile communication system, comprising:

an RLP sequence number generator storing a sequence number tree having a plurality of nodes each associated with frame information and at least one data rate supportable by the mobile communication system, and upon receipt of a sequence number request, reading frame information for a designated node from the sequence number tree to provide the read frame information;
and
an RLP controller for transmitting and receiving an RLP frame according to the frame information provided in response to the sequence number request.

A device for generating a sequence number for an RLP frame, comprising:

a first RLP sequence number generator including a sequence number tree having a plurality of nodes associated with frame information and data rates, and upon receipt of a first sequence number request, reading frame information for a designated node from the sequence number tree to provide the read frame information for a frame to be transmitted;
a second RLP sequence number generator including a sequence number tree having a plurality of nodes associated with frame information and data rates, and upon receipt of a second sequence number request, reading frame information for a designated node from the sequence number tree to provide the read frame information for a frame to be received next in order;
a third RLP sequence number generator including a sequence number tree having a plurality of nodes associated with frame information and data rates, and upon receipt of a third sequence number request, reading frame information for a designated node from the sequence number tree to provide the read frame information for a frame to be retransmitted;
and
an RLP controller for transmitting, receiving and retransmitting an RLP frame according to frame information received in response to the first, second and third sequence number requests.

2 more elements

Dependencies are inferred from the claim text.

Description6,806 words

Summary825 words

#This application claims priority to an application entitled “Device and Method for Processing Radio Link Protocol in Mobile Communication System” filed in the Korean Industrial Property Office on Jun. 13, 1998 and assigned Serial No. 98-22216, the contents of which are incorporated herein by reference.

#1. Field of the Invention

#The present invention relates generally to a mobile communication system and in particular, to a device and method for processing a radio link protocol in a CDMA communication system. Specifically, the present invention relates to a device and method for processing a radio link protocol for packet data communication in a variable rate environment in a CDMA communication system.

Brief description of the drawings12 figures

#The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:

#FIG. 1 is a diagram illustrating a case where a frame being transmitted at a higher data rate is retransmitted at a lower data rate according to an embodiment of the present invention;

#FIG. 2 is a flow chart illustrating a method of generating sequence numbers required for respective data rates according to an embodiment of the present invention;

Detailed description5,628 words

#A preferred embodiment of the present invention will be described hereinbelow with reference to the accompanying drawings.

#For an effective data communication, a CDMA mobile communication system generally requires a new sequence number generation method capable of preventing a data loss in a radio environment with data rate being varied at any time. The present invention provides a new sequence number generation method which is compatible with an existing radio link protocol. Table 1 shows data rates and associated frame sizes (or lengths) which are supported by the IMT-2000 standard. The frame lengths represent the maximum frame lengths permissible at the associated data rates.

#TABLE 1 Data Rate Data Rate Order IMT-2000 IMT-2000 (i) System Frame Size System Frame Size 0 9.6 Kbps 21 Bytes 14.4 Kbps 33 Bytes 1 19.2 Kbps 45 Bytes 28.8 Kbps 69 Bytes 2 38.4 Kbps 93 Bytes 57.6 Kbps 141 Bytes 3 76.8 Kbps 189 Bytes 115.2 Kbps 285 Bytes 4 153.6 Kbps 381 Bytes 230.4 Kbps 573 Bytes 5 307.2 Kbps 765 Bytes 460.8 Kbps 1149 Bytes 6 614.4 Kbps 1533 Bytes 921.6 Kbps 2301 Bytes 7 1036.8 Kbps 2589 Bytes 1036.8 Kbps 2589 Bytes 8 1228.8 Kbps 3069 Bytes 1843.2 Kbps 4605 Bytes 9 2073.8 Kbps 5181 Bytes 2073.6 Kbps 5181 Bytes 10 2457.8 Kbps 6141 Bytes

Facts

Application

09/333,190Filed 14 Jun 1999

Priority

KR 98-2221613 Jun 1998

Granted

22 Apr 2003

Term ended

14 Jun 2019

Estimated · how

20 years from earliest known nonprovisional domestic filing. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination. Patent term adjustment is unavailable; no adjustment was added.

Classification11 codes

H04L 1/1867
Automatic repetition systems, e.g. Van Duuren systems: arrangements specially adapted for the transmitter end
H04L 47/10
Traffic control in data switching networks: flow control; Congestion control
H04L 47/34
Flow control; Congestion control: ensuring sequence integrity, e.g. using sequence numbers
H04W 8/04
Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of…:…

Device and method processing a radio link protocol in a mobile communication system

Life of this patent

Device and method processing a radio link protocol in a mobile communication system

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims19

Description6,806 words

Drawings

Classification11 codes

Life of this patent

Description6,806 words