Method for branching data in mobile communication terminal

• US 20050122924A1
• Filed: 01/06/2005
• Published: 06/09/2005
• Est. Priority Date: 10/01/1998
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Hwang, In Tae, Ok, Myoung Jin, Shin, Sang Rim
• Granted Patent: US 7,295,529 B2
• Time in Patent Office: Days
• US Class Current: 370/310
• CPC Class Codes: H04W 28/065 using assembly or disassembly of packets
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

A method for branching data in a mobile communication terminal to perform data communication between a mobile station and a network which have media access control sublayers. In a data sending mode, each of the media access control sublayers of the mobile station and network attaches logical channel types based on traffic characteristic information and a radio bearer status to a media access control header contained in data to be sent. Then, each of the media access control sublayers branches the data to be sent, to transport channels corresponding to the attached logical channel types. In a data receiving mode, each of the media access control sublayers determines logical channels corresponding to logical channel types of a media access control header contained in received data. Then, each of the media access control sublayers branches the received data to the determined logical channels. Each of the media access control sublayers performs mapping and muitiplexing/demultiplexing between logical channels and transport channels according to traffic characteristics to branch data. Therefore, it is possible to efficiently provide various multimedia and packet services.

Claims

1. A method of processing data in a medium access control (MAC) layer of a mobile communication device, comprising:

providing information indicative of logical channel types based on traffic characteristics information to a media access control header of data to be sent, in a data sending mode;

performing a one to one channel mapping or a multi to one channel mapping between the logical channels and transport channels to deliver the data to be sent to the transport channels, in the data sending mode;

determining logical channels from information indicative of logical channel types provided in a media access control header of received data, in a data receiving mode; and

performing a one to one channel mapping or a one to multi channel mapping between the logical channels and the transport channels to deliver the received data to the determined logical channels, in the data receiving mode.

2. A method comprising:

mapping a first set of channels with a second set of channels in a medium access control (MAC) layer of a mobile communication device, the first set of channels being between the MAC layer and at least one of upper layers, and the second set of channels being between the MAC layer and a lower layer, wherein

the mapping is performed in a multi to one manner or a one to multi manner, and

the first set of channels comprises a dedicated control channel and a dedicated traffic channel, and the second set of channels comprises a forward access channel, a random access channel, and a dedicated channel.

3. A method for processing data in a medium access control (MAC) layer of a mobile communication device, comprising:

receiving traffic characteristic information from at least one of upper layers;

identifying logical channel types based on the traffic characteristic information;

including information indicative of the logical channel types into a header of a medium access control protocol data unit (MAC PDU); and

delivering the medium access control protocol data unit (MAC PDU) to a lower layer.

4. A method of mapping between logical channels and transport channels, comprising:

(a) mapping a dedicated control channel (DCCH), which is a logical channel, to at least two transport channels; and

(b) mapping a dedicated traffic channel (DTCH), which is a logical channel, to said at least two transport channels, wherein the mapping is performed in a medium access control (MAC) layer.

5. The method of claim 4, wherein DCCH and DTCH is allowed for connection to either a random access channel (RACH) and a forward access channel (FACH), to RACH and a downlink shared channel (DSCH), to a dedicated channel DCH) and DSCH or to the DCH.

6. The method of claim 5, further comprising mapping a common control channel (CCCH), which is a logical channel, to RACH and FACH.

7. The method of claim 4, further comprising mapping synchronization control channel (SCCH), which is a logical channel, for connection to a synchronization channel (SCH), which is a transport channel.

8. The method of claim 4, further comprising mapping a broadcast control channel CCCH), which is a logical channel, for connection to a broadcast channel (BCH), which is a transport channel.

9. The method of claim 6, wherein

(a) DCCH is a point-to-point bi-directional channel that transmits dedicated control information between a mobile station and a communication network;

(b) DTCH is a point-to-point bi-directional channel that transmits user information and dedicated to one mobile station;

(c) CCCH is a bi-direction channel for transmitting control information between at least one mobile station and a communication network;

(d) RACH is an uplink channel for transmission of at least one of control information or small amount of data;

(e) FACH is a common downlink channel for transmission of at least one of control information or a small amount of data;

(f) DSCH is a downlink channel shared by several mobile stations for transmission of at least user data;

(g) DCH is a channel dedicated to one mobile station used in uplink and downlink

10. The method of claim 5, wherein a medium access control (MAC) protocol data unit comprises a header and data, wherein the header includes channel type information for mapping multiple logical channels on the same transport channel.

11. The method of claim 5, wherein the channel type information provides mapping at least one logical channel on FACH and RACH transport channels.

12. The method of claim 6, wherein a medium access control (MAC) protocol data unit comprises a header and data, wherein the header includes channel type information for mapping at least one logical channel on FACH and RACH transport channels.

13. The method of claim 11, wherein the channel type information is based on at least one of traffic characteristic information or radio bearer status from at least one of radio resource control (RRC) layer or other upper layers to a MAC layer.

14. The method of claim 13, wherein such mapping is used for at least one of transmission or reception of data in a communication device.

15. A method of performing data communication between a mobile station and a network, each having a medium access control (MAC) layer, the method comprising:

(a) mapping a dedicated control channel (DCCH), which is a logical channel, to at least two transport channels for MAC layer protocol; and

(b) mapping a dedicated traffic channel (DTCH), which is a logical channel, to said at least two transport channels for MAC layer protocol,

wherein during data transmission mode, providing a MAC protocol data unit (PDU), the MAC PDU having header and data, the header including at least one of logical channel type information which is indicative of the mapping, and

wherein during data reception mode,

determining logical channels based on the logical channel type information contained in the header of MAC protocol data unit, and branching the received data to corresponding MAC service access points based on the determined logical channels.