Method for selection and signaling of downlink and uplink bandwidth in wireless networks

• US 8,243,665 B2
• Filed: 01/30/2007
• Issued: 08/14/2012
• Est. Priority Date: 02/07/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Young-Dae, Chun, Sung-Duck, Jung, Myung-Cheul, Park, Sung-Jun
• Primary Examiner(s): Phillips, Hassan
• Assistant Examiner(s): Ebrahim, Anez
• Application Number:
  US12/278,558
• Publication Number:
  US 20090010219A1
• Time in Patent Office: 2,023 Days
• Field of Search: 370/277, 370/295, 370/345, 370/347, 370/349, 370/352, 370/389, 370/401, 370/252, 370/253, 370328-338, 370/468, 455/234.1, 455/422.1, 455/433, 455/445, 455/449, 455/561, 455/564, 455/565, 455450-453
• US Class Current: 370/329
• CPC Class Codes: H04B 17/24 with feedback of measurements to the transmitter
• CPC Class Codes: H04B 17/382 for resource allocation, admission control or handover
• CPC Class Codes: H04W 28/20 Negotiating bandwidth
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

In a wireless mobile communications system, a method of receiving data or signaling on a channel from a cell having a plural of divisions of cell bandwidth. Utilizing one or more sub-bandwidths to receive data or a signaling from the cell, thereby optimizing data or signaling transmission efficiency.

Claims

1. A method of handling mobile communications, the method comprising:

receiving, by a network, signaling from a mobile terminal to determine how to allocate at least one sub-bandwidth of a cell bandwidth to support uplink or downlink communications;

allocating, by the network, the at least one sub-bandwidth according to the received signaling from the mobile terminal;

transmitting, from the network to the mobile terminal, information associated with the allocation of the at least one sub-bandwidth;

performing, by the network, uplink or downlink communications via the at least one allocated sub-bandwidth,

wherein a bandwidth size of each of the at least one allocated sub-bandwidth is equal to a minimum bandwidth size of the mobile terminal;

transmitting, by the network, a measurement control message to request the mobile terminal to report measurement results;

measuring, by the mobile terminal, a channel quality of a cell after receiving the measurement control message; and

using the measured channel quality to decide which part of the cell bandwidth the mobile terminal should receive,

wherein measuring the channel quality comprises;

measuring, by the mobile terminal, a neighboring cell by obtaining frequency information regarding the neighboring cell; and

determining, by the mobile terminal, whether to perform an inter-frequency measurement or an intra-frequency measurement based on the obtained frequency information,

wherein it is determined to perform the intra-frequency measurement if the neighboring cell is located in a same frequency bandwidth as a current cell of the mobile terminal, and

wherein the intra-frequency measurement is performed without re-tuning of a receiver in the mobile terminal for switching from the current cell to the neighboring cell.

2. The method of claim 1, further comprising:

dividing, by the network, the cell bandwidth into multiple sub-bandwidths.

3. The method of claim 1, further comprising:

using the at least one allocated sub-bandwidth for at least an initial access, a response to the initial access, or a connection setup.

4. The method of claim 3, wherein the initial access is associated with random access procedures and the connection setup is associated with a radio resource control.

5. The method of claim 1, further comprising:

transmitting control channel information via the at least one allocated sub-bandwidth.

6. The method of claim 5, wherein the control channel information is associated with at least a synchronization channel, a paging channel (PCH), a broadcast channel (BCH), a paging message, or system information.

7. The method of claim 1, further comprising:

receiving, by the mobile terminal, system information including at least one designated sub-bandwidth of the cell bandwidth for at least an initial access response or a Radio Resource Control (RRC) connection setup.

8. The method of claim 1, wherein the cell bandwidth is contiguously connected to at least one other cell bandwidth when the at least one other cell bandwidth is controlled by a same network as the cell bandwidth.

9. A method of handling mobile communications, the method comprising:

transmitting, by a mobile terminal, signaling to a network to determine how allocation of at least one sub-bandwidth of a cell bandwidth should be performed;

receiving, by the mobile terminal, a measurement control message for performing a measurement;

measuring, by the mobile terminal, a channel quality of a cell in response to receiving the measurement control message;

reporting, by the mobile terminal, the channel quality of the cell to the network; and

receiving, by the mobile terminal, allocation of the at least one sub-bandwidth of the cell bandwidth to support uplink or downlink communications; and

performing, by the mobile terminal, uplink or downlink communications according to the at least one allocated sub-bandwidth,

wherein the allocation of the at least one sub-bandwidth is based on the reported channel quality of the cell, and

wherein a bandwidth size of each of the at least one sub-bandwidth is equal to a minimum bandwidth size of the mobile terminal,

wherein the reported channel quality is to be used to decide which part of the cell bandwidth the mobile terminal should receive,

wherein measuring the channel quality comprises;

measuring, by the mobile terminal, a neighboring cell by obtaining frequency information regarding the neighboring cell; and

determining, by the mobile terminal, whether to perform an inter-frequency measurement or an intra-frequency measurement based on the obtained frequency information,

wherein it is determined to perform the intra-frequency measurement if the neighboring cell is located in a same frequency bandwidth as a current cell of a mobile terminal, and

wherein the intra-frequency measurement is performed without re-tuning of a receiver in the mobile terminal for switching from the current cell to the neighboring cell.

10. The method of claim 9, wherein the signaling is associated with at least random access information, a measurement result, or system information.

11. The method of claim 9, wherein the measured channel quality includes at least a path loss or a power level.

12. The method of claim 9, wherein the allocation of the at least one sub-bandwidth is determined randomly when the signaling does not include any information.

13. The method of claim 9, wherein the signaling includes information to indicate at least one designated sub-bandwidth.

14. The method of claim 13, wherein the at least one designated sub-bandwidth is used for at least an initial access response or a Radio Resource Control (RRC) connection setup.

15. The method of claim 9, wherein it is determined to perform the inter-frequency measurement when the neighboring cell is located in a frequency bandwidth which is different from the current cell of the mobile terminal.

16. The method of claim 15, wherein the inter-frequency measurement is performed with re-tuning of the receiver in the mobile terminal for switching from the current cell to the neighboring cell.

17. The method of claim 9, wherein performing the intra-frequency measurement comprises performing the intra-frequency measurement without any gap of time interval.