Scheduling Different Types of Receivers in a Radio Base Station

• US 20120099621A1
• Filed: 07/01/2009
• Published: 04/26/2012
• Est. Priority Date: 07/01/2009
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Karlsson, Patrik, Wigren, Torbjorn
• Granted Patent: US 8,743,839 B2
• Time in Patent Office: Days
• US Class Current: 375/148
• CPC Class Codes: H04B 2201/70702 Intercell-related aspects
• CPC Class Codes: H04W 52/283 Power depending on the position of the mobile
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

The invention relates to a method in a radio base station (110) of a radio 100 telecommunications network (100), wherein the radio base station (110) comprises at least two different types of receivers; a first type of receivers and a second type of receivers. The first type of receivers comprises a different receiving sensitivity than the second type of receivers. The method is for scheduling a first type of receiver to a user equipment (120) within a radio cell (115) served by the radio base station (110). The radio base station determines a distance (125) between the user equipment (120) and a radio cell boundary (127) of the radio cell (115), and schedules the first type of receiver to the user equipment (120) when the distance is determined to be within a distance range.

Claims

1. A method in a radio base station for scheduling a receiver of a first type to a user equipment within a radio cell served by the radio base station, wherein the radio base station comprises at least two different types of receivers;

the first type of receiver and a second type of receiver, the first type of receiver comprises a receiver with a different receiving sensitivity than a receiver of the second type, the method comprising;

determining a distance between the user equipment and a radio cell boundary of the radio cell, and

scheduling the receiver of the first type to the user equipment when the distance is determined to be within a distance range.

2. The method according to claim 1, wherein said first type of receiver comprises a receiver with higher receiving sensitivity by comprising an interference cancellation function.

3. The method according to claim 1, wherein said first type of receivers comprises a GRAKE+ receiver or a chip sequencer and the second type of receiver comprises a RAKE or a GRAKE receiver.

4. The method according to claim 1, further comprising

receiving a signal from the user equipment indicating the distance between the user equipment and the radio cell boundary.

5. The method according to claim 4, wherein said signal comprises an indication of the transmitted power of the user equipment.

6. The method according to claim 1, further comprising

retrieving location of the radio cell boundary, and

positioning the user equipment within the radio cell, wherein the step of determining the distance is based on the retrieved location of the radio cell boundary and the positioned user equipment.

7. The method according to claim 1, further comprising

receiving a signal from a network node over an interface, which signal comprises an indicator indicating distance to the radio cell boundary together with an ID of the user equipment.

8. the method according to claim 7, wherein the indicator comprises a boolean flag, a minimum distance, information of radio cell size, the radio cell polygon description of the radio cell boundary, and/or position of the user equipment.

9. The method according to claim 1, wherein

a second user equipment is comprised within the radio cell and the second user equipment is positioned a distance from the radio cell boundary and

the method further comprises sorting the user equipment and the second user equipment in a list based on the distances between respective user equipment and the radio cell boundary, and wherein the distance range is based on the list and the number of first type receivers available in the radio base station.

10. The method according to claim 1, wherein the distance range comprises a predetermined distance to the radio cell boundary.

11. An arrangement in a radio base station comprising:

at least two different types of receivers;

a first type of and a second type, wherein the first type comprises a receiver with different receiving sensitivity than a receiver of the second type,

a determining unit arranged to determine a distance between a user equipment and a radio cell boundary of a radio cell served by the radio base station, and

a scheduling unit arranged to schedule the receiver of the first type of receivers to the user equipment when the distance is within a distance range.

12. A method in a network node for assisting a radio base station in scheduling a receiver of a first type of receivers to a user equipment the method comprising:

signaling to the radio base station, an indicator indicating a distance between the user equipment and a radio cell boundary of a radio cell served by the radio base station, and an identity of the user equipment, wherein

the radio base station comprises at least two different types of receivers;

a first type and a second type, the first type comprises a receiver with a different receiving sensitivity than a receiver of the second type, and the distance is to be used when scheduling the receiver of the first type of receiver to the user equipment.

13. The method according to claim 12, further comprising

retrieving a location of the radio cell boundary of the radio cell,

positioning the user equipment within the radio cell, and

establishing the distance between the user equipment and the radio cell boundary based on the retrieved location of the radio cell boundary and the position of the user equipment.

14. The method according to claim 12, wherein the signaling is performed over a Node B Application Part interface or X2 interface.

15. The method according to claim 12, wherein the indicator comprises a boolean flag, a minimum distance, information of radio cell size, the radio cell polygon description of the radio cell boundary and/or position of the user equipment.

16. An arrangement in a network node comprising:

a signaling unit arranged to signal an indicator indicating a distance between a user equipment and a radio cell boundary of a radio cell served by the radio base station, wherein the radio base station comprises at least two different types of receivers;

a first type of receivers and a second type of receivers wherein the first type of receivers comprises a receiver with a different receiving sensitivity than a receiver of the second type of receivers, and the distance is to be used when scheduling a receiver of the first type of receivers to the user equipment and an identity of the user equipment to the radio base station over a network interface unit comprised in the arrangement.