Method and apparatus for managing power in a mobile communication system

• US 20030125069A1
• Filed: 12/27/2002
• Published: 07/03/2003
• Est. Priority Date: 12/28/2001
• Status: Active Grant

• Current Assignee: LG-Ericsson Company Limited (Telefonaktiebolaget LM Ericsson)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Jung Yun
• Granted Patent: US 7,035,662 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/36 with a discrete range or set of values, e.g. step size, ramping or offsets
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 74/00 Wireless channel access
• CPC Class Codes: H04W 76/10 Connection setup

Abstract

A method and apparatus can manage power in a mobile communication system according to a call setup in a user equipment. The method can include setting a radio link in response to a setup command, receiving a radio access bearer allocation request command to reset a down link power range, and performing a radio link reconfiguration with the base station; transmitting a down link power measurement request command to adjust the down link power range in response to a down link power measurement result; reconfiguring a radio link in response to the adjusted down link power range. The transmitting and reconfiguring can be repeatedly performed for user equipment. Accordingly, an excessive down link power allocation to a specific subscriber and an abrupt variation of a total down link power can be reduced, and a number of subscribers, who respective cells can accommodate by a call starting control, can be increased.

Claims

1. A method for managing power in a mobile communication system according to a call setup in a user equipment, the method comprising:

a) receiving a radio resource control access request command from the user equipment and calculating a down link initial power value and a down link power range;

b) transmitting a radio link setup command including the down link power value to a base station;

c) setting a radio link in response to the radio link setup command, receiving a radio access bearer allocation request command to reset the down link power range, and performing a radio link reconfiguration with the base station;

d) transmitting a down link power measurement request command to adjust the down link power range in response to a down link power measurement result of a base station modem;

e) reconfiguring a radio link in response to the adjusted down link power range; and

f) performing the d), e) steps repeatedly for the user equipment at a calling state.

2. The method according to claim 1, wherein the step comprises:

receiving the radio resource control access request command for the user equipment;

obtaining a received signal code power or a signal to noise ratio from MORIE (measurement on random access channel information element) contained in the received radio resource control access request command to calculate the down link initial power value; and

calculating the down link minimum/maximum value using the obtained down link initial power value and a service category.

3. The method according to claim 2, wherein the radio resource control access request command includes an identification number of the user equipment, request service category requested by the user, and MORIE.

4. The method according to claim 2, wherein the down link initial power value is calculated by a signal to noise ratio of a channel transmitting data from the base station modem to the user equipment, a signal to noise ratio received from the user equipment and an operation of a processing gain.

5. The method according to claim 1, wherein the down link power range is reset in response to QoS (Quality of Service) parameter of the radio access bearer allocation request command.

6. The method according to claim 1, wherein the step d) comprises:

measuring expected power value of the reset call and determining whether a value added to a current power is larger than a predetermined critical value;

if the measured power value is smaller than the predetermined critical value, adjusting the down link power range in consideration of a power level for a corresponding cell, and determining whether an available down link power exists in the cell; and

if the available down link power exists in the cell, transmitting the radio link reconfiguration command including a to-be-adjusted down link power range to a node B.

7. The method according to claim 6, further comprising reconfiguring a radio link in response to the asynchronous radio link reconfiguration command and transmitting the adjusted down link power range to the base station modem.

8. The method according to claim 1, wherein the radio resource control access request command comprises user information and communication service information.

9. The method according to claim 1, wherein the down link initial power value is calculated in accordance with data channel transmission and reception characteristics.

10. The method according to claim 1, wherein the down link power range is reset in response to a quality level.

11. A method for managing power in a mobile communication system, the method comprising:

a) receiving a radio resource control access request command from a user equipment by a base station, obtaining a received signal code power or a signal to noise ratio from MORIE contained in the received radio resource control access request command to calculate a down link initial power value and down link minimum/maximum power values;

b) transmitting a radio link setup command including the down link initial power value and the down link minimum/maximum power values to a node B;

c) receiving a radio access bearer allocation request command from the core network by the base station, resetting the down link minimum/maximum power values in response to QoS (Quality of Service) parameter of the radio access bearer allocation request command, and performing the radio link reconfiguration;

d) transmitting a down link power measurement request command from a RNC to a base station modem via the node B;

e) continuously measuring the down link power value in the base station modem and, if the down link power value is larger than a critical value of a down link measurement request, transmitting down link minimum/maximum power adjustment command to the RNC via the base station;

f) adjusting the down link minimum/maximum power values in consideration for a power level of a cell by the base station, and determining whether or not an available down link power exists in corresponding cell;

g) if the available down link power exists in the corresponding cell, adjusting the down link minimum/maximum power using an asynchronous radio link reconfiguration, and transmitting the adjusted down link minimum/maximum power values to the base station modem via the node B to thereby adjust the down link minimum/maximum power values; and

h) performing the d), e), f), g) steps repeatedly for the user equipment at a calling state.

12. The method according to claim 11, wherein a call is allowed only when, after an operation of a determined power value of a new call and a total transmission power value of a previous down link, a result value of the operation is smaller than a critical value previously defined according to each cell.

13. A method for managing power in a mobile communication system according to a traffic path setup after a call setup of a user equipment, the method comprising:

if a radio access bearer allocation request command is received from a core network, resetting minimum/maximum power values in response to the radio access bearer allocation request command;

measuring the reset minimum/maximum power values and determining whether the measured power value is larger than a predetermined critical value;

if the measured power value is larger than the critical value, adjusting the minimum/maximum power values in consideration for a power level of corresponding cell, and determining whether an available power exists in the cell; and

if the available power exists in the cell, transmitting an asynchronous radio link reconfiguration command including the adjusted minimum/maximum power values to a node B to reconfigure a radio link, and adjusting the down link minimum/maximum power values in a base station.

14. A system, comprising:

RNC for calculating a down link initial power value and down link power minimum/maximum values from a radio resource control access request command transmitted from user equipment, and resetting the down link minimum/maximum values in response to a parameter of a radio access bearer allocation request command transmitted from a core network;

a node B constituting a radio link in response to a radio link setup information or a radio link reconfiguration command, which are transmitted from the RNC; and

a base station modem for measuring a down link power value in response to a down link power measurement request command, determining whether the measured down link power value is larger than a predetermined critical value, and storing a down link initial power value and down link minimum/maximum power values, which are determined in the RNC.

15. The system according to claim 14, wherein the RNC performs an operation of the obtained down link initial power value and total down link transmission power value and determines whether the result value of the operation is larger than a predetermined critical value, and a call is allowed if the result value is smaller than the predetermined critical value.

16. The system according to claim 15, wherein the parameter is QoS (Quality of Service).

17. A method, comprising:

a) receiving a signal to initialize a power value and establish a power range related to said received signal;

b) transmitting a setup signal including said power value to a communication node;

c) setting a communication link in response to said setup signal, receiving an allocation signal to reset said power range, and performing a communication link reconfiguration with said communication node;

d) transmitting a power measurement signal to adjust said power range in response to a power measurement result of a communication node device;

e) reconfiguring a communication link in response to the adjusted said power range; and

f) performing the d) and e) steps repeatedly for user equipment at a communication state.

18. The method according to claim 17, wherein the step a) comprises:

receiving a signal for the user equipment;

obtaining a received signal power or a signal to noise ratio from other communication channel information to calculate an initial power value; and

calculating a minimum/maximum transmission value using said initial power value and a service category.