METHOD AND APPARATUS FOR CONTROLLING A USER EQUIPMENT TO MEASURE INACTIVE DOWNLINK COMPONENT CARRIER

• US 20120281582A1
• Filed: 01/08/2010
• Published: 11/08/2012
• Est. Priority Date: 01/08/2010
• Status: Abandoned Application

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: Yang, Tao, Lim, Seau Sian
• Application Number:
  US13/520,664
• Publication Number:
  US 20120281582A1
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 17/327 Received signal code power [RSCP]
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The invention proposes a method and apparatus for a user equipment to decide by itself to measure an inactive downlink component carrier and a method and apparatus for a base station to control a user equipment to measure an inactive downlink component carrier. The invention further proposes a method and apparatus for a user equipment to request transmission of a sounding reference signal and a method and apparatus for a base station to control a user equipment to transmit a sounding reference signal. Both the user equipment and the base station are located in a wireless communication system based on carrier aggregation. The technical solutions of the invention can achieve a trade-off between low power consumption of the user equipment and the rapid and accurate response to the component carrier.

Claims

1. A method, in a network device of a wireless communication system based on a carrier aggregation technology, of controlling a user equipment to measure an inactive downlink component carrier, the method comprising the step of:

a. based upon a trigger condition, controlling the user equipment to open a downlink radio frequency of a target inactive downlink component carrier and to measure the target inactive downlink component carrier.

2. The method according to claim 1, wherein the network device is the user equipment, and the step a comprises the steps of:

m. based upon the trigger condition, opening the downlink radio frequency of the target inactive downlink component carrier and measuring the target inactive downlink component carrier; and

n. transmitting a measurement report to a base station.

3. The method according to claim 2, the method further comprising the steps of:

transmitting a fifth instruction message to the base station, wherein the fifth instruction message is used for instructing the base station to activate one or more inactive downlink component carriers; and

receiving a sixth instruction message from the base station, and according to the sixth instruction message, opening an uplink radio frequency of an inactive uplink component carrier paired with the target inactive downlink component carrier and transmitting a sounding reference signal to the base station.

4. The method according to claim 1, wherein the network device is a base station, and the step a comprises the steps of:

M. based upon the trigger condition, transmitting a first instruction message to the user equipment, wherein the first instruction message is used for instructing the user equipment to measure the target inactive downlink component carrier;

N. receiving a measurement report from the user equipment; and

O. activating one or more optimal downlink component carriers according to the measurement report.

5. The method according to claim 4, wherein before the step O, the method further comprising the steps of:

determining whether an uplink component carrier paired with the target inactive downlink component carrier is in an active status;

if not, transmitting a second instruction message to the user equipment, wherein the second instruction message is used for instructing the user equipment to open an uplink radio frequency of the inactive uplink component carrier paired with the target inactive downlink component carrier and to transmit a sounding reference signal; and

measuring the inactive uplink component carrier,

wherein the step O further comprises the step of;

according to the measurement report received from the user equipment and a measurement result of the base station, activating one or more pairs of optimal uplink and downlink component carriers.

6. A method, in a user equipment of a wireless communication system based on a carrier aggregation technology, of assisting a base station in controlling the user equipment to measure an inactive downlink component carrier, the method comprising the steps of:

I. receiving a first instruction message from the base station;

II. according to the first instruction message, opening a downlink radio frequency of a target inactive downlink component carrier and measuring the target inactive downlink component carrier; and

III. transmitting a measurement report to the base station.

7. The method according to claim 6, the method further comprising the steps of:

X. receiving a second instruction message from the base station; and

Y. according to the second instruction message, opening an uplink radio frequency of an inactive uplink component carrier paired with the target inactive downlink component carrier and transmitting a sounding reference signal to the base station.

8. A method, in a network device of a wireless communication system based on a carrier aggregation technology, of controlling a user equipment to transmit a sounding reference signal, the method comprises the step of:

i. based upon a trigger condition, controlling the user equipment to open an uplink radio frequency of a target inactive uplink component carrier and to transmit the sounding reference signal to a base station.

9. The method according to claim 8, wherein the network device is the user equipment, and the step i further comprises the steps of:

e. based upon the trigger condition, transmitting a seventh instruction message to the base station, wherein the seventh instruction message is used for instructing the base station to activate one or more inactive uplink component carriers; and

f. receiving an eighth instruction message from the base station, and according to the eighth instruction message, opening the uplink radio frequency of the target inactive uplink component carrier and transmitting the sounding reference signal to the base station.

10. The method according to claim 9, the method further comprising the steps of:

determining whether a downlink component carrier paired with the target inactive uplink component carrier is in an active status;

if not, opening a radio frequency of the inactive downlink component carrier paired with the target inactive uplink component carrier and measuring the inactive downlink component carrier; and

transmitting a measurement report to the base station.

11. The method according to claim 8, wherein the network device is the base station, and the step i further comprises the steps of:

E. based upon the trigger condition, transmitting a third instruction message to the user equipment, wherein the third instruction message is used for instructing the user equipment to open the uplink radio frequency of the target inactive uplink component carrier and to transmit the sounding reference signal;

F. measuring the target inactive uplink component carrier; and

G. activating one or more optimal uplink component carriers according to a measurement result.

12. The method according to claim 11, wherein before the step G, the method further comprising the steps of:

determining whether a downlink component carrier paired with the target inactive uplink component carrier is in an active status;

if not, transmitting a fourth instruction message to the user equipment, wherein the fourth instruction message is used for instructing the user equipment to measure the inactive downlink component carrier paired with the target inactive uplink component carrier; and

receiving the measurement report from the user equipment,

wherein the step G further comprises the step of;

according to the measurement report received from the user equipment and the measurement result of the base station, activating one or more pairs of optimal uplink and downlink component carriers.

13. A method, in a user equipment of a wireless communication system based on a carrier aggregation technology, of assisting a base station in controlling the user equipment to transmit a sounding reference signal, the method comprising the steps of:

A. receiving a third instruction message from the base station; and

B. according to the third instruction message, opening an uplink radio frequency of a target inactive uplink component carrier and transmitting the sounding reference signal to the base station.

14. A first control apparatus, in a network device of a wireless communication system based upon a carrier aggregation technology, for controlling a user equipment to measure an inactive downlink component carrier, wherein the first control apparatus is configured to control, based upon a trigger condition, the user equipment to open a downlink radio frequency of a target inactive downlink component carrier and to measure the target inactive downlink component carrier, and wherein the network device is a base station or the user equipment.

15. A second control apparatus, in a network device of a wireless communication system based upon a carrier aggregation technology, for controlling a user equipment to transmit a sounding reference signal, wherein the second control apparatus is configured to control, based upon a trigger condition, the user equipment to open an uplink radio frequency of a target inactive uplink component carrier and to transmit a sounding reference signal to a base station, and wherein the network device is the base station or the user equipment.