METHOD AND APPARATUS FOR A MOBILE SELECTION BASED INITIAL ACCESS SCHEME IN A MULTICARRIER SYSTEM

• US 20100322174A1
• Filed: 06/17/2010
• Published: 12/23/2010
• Est. Priority Date: 06/17/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Ji, Hyoung Ju, Kim, Young Bum, Cho, Joon Young, Yeon, Myung Hoon
• Granted Patent: US 9,717,096 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

A method and apparatus for initial access of a mobile device in multi-carrier system. A base station transmits initial access resource information about the entire system band to the mobile device through a specific carrier to which the mobile device tries initial access. The mobile device determines an uplink initial access band by using received initial access resource information. The base station enables initial access through a predefined downlink response band.

Claims

1. A method for performing initial access by a mobile device in a multi-carrier system, the method comprising:

receiving, from a base station through a carrier trying initial access, initial access resource information about at least one carrier among carriers in an entire system band;

selecting an initial access resource by using the received initial access resource information; and

transmitting, to the base station, an initial access signal by using the selected initial access resource.

2. The method of claim 1, wherein the initial access resource information includes information about an uplink band corresponding to a downlink band, and

wherein transmitting the initial access signal comprises transmitting the initial access signal through a band that is predetermined using the information about the uplink band.

3. The method of claim 1, wherein the initial access resource information includes a master information block about the entire system band, and

wherein transmitting the initial access signal comprises transmitting the initial access signal to the base station, without receiving a broadcast channel, after selecting the initial access resource.

4. The method of claim 1, wherein the initial access resource information includes permission information about a band included in the entire system band.

5. A method for performing initial access by a base station in a multi-carrier system, the method comprising:

transmitting, to a mobile device through a carrier to which the mobile device tries the initial access, initial access resource information about at least one carrier from among carriers included in an entire system band;

receiving an initial access signal through an initial access resource selected by the mobile device; and

transmitting, to the mobile device, an initial access response signal in response to the received initial access signal.

6. The method of claim 5, wherein the initial access resource information includes information about an uplink band corresponding to a downlink band, and

wherein receiving the initial access signal comprises receiving the initial access signal through a band that is predetermined using the information about the uplink band.

7. The method of claim 5, wherein the initial access resource information includes a master information block about the entire system band, and

wherein receiving the initial access signal comprises receiving the initial access signal, without receiving a broadcast channel, after the mobile device selects the initial access resource.

8. The method of claim 5, wherein the initial access resource information includes permission information about a band included in the entire system band.

9. A mobile device for performing initial access to a base station in a multi-carrier system, the mobile device comprising:

a transceiver that transmits and receives a signal for the initial access; and

a controller that controls receiving, from the base station through a carrier trying the initial access, initial access resource information about at least one carrier from among carriers included in an entire system band, selects an initial access resource by using the received initial access resource information, and controls transmitting an initial access signal to the base station by using the selected initial access resource.

10. The mobile device of claim 9, wherein the initial access resource information includes information about an uplink band corresponding to a downlink band, and

wherein the controller controls transmitting the initial access signal through a band predetermined using the information about the uplink band.

11. The mobile device of claim 9, wherein the initial access resource information includes a master information block about the entire system band, and

wherein the controller controls transmitting the initial access signal to the base station, without receiving a broadcast channel, after selecting the initial access resource.

12. The mobile device of claim 9, wherein the initial access resource information includes permission information about a band included in the entire system band.

13. A base station for performing initial access with a mobile device in a multi-carrier system, the base station comprising:

a synchronized band initial access resource information generator that generates first initial access resource information about a carrier to which the mobile device tries the initial access;

a multi-band initial access resource information generator that generates second initial access resource information about remaining carriers other than the carrier to which the mobile device tries the initial access;

a controller that controls generating initial access resource information about an entire system band by using the first initial access resource information and the second initial access resource information;

a transmitter that transmits the initial access resource information through the carrier to which the mobile device tries the initial access; and

a receiver that receives an initial access signal through an initial access resource selected by the mobile device.

14. The base station of claim 13, wherein the initial access resource information includes information about an uplink band corresponding to a downlink band, and

wherein the receiver receives the initial access signal through a band that is predetermined using the information about the uplink band.

15. The base station of claim 13, wherein the initial access resource information includes a master information block about the entire system band, and

wherein the receiver receives the initial access signal, without receiving a broadcast channel, after the mobile device selects the initial access resource.

16. The base station of claim 13, wherein the initial access resource information includes permission information about a band included in the entire system band.