POWER CONTROL METHOD, ACTIVATION MANAGEMENT METHOD, USER EQUIPMENT, AND BASE STATION

• US 20160309417A1
• Filed: 06/27/2016
• Published: 10/20/2016
• Est. Priority Date: 08/30/2011
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: HAN, Guanglin, LIU, Jianqin
• Granted Patent: US 10,412,683 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 52/0206 in access points, e.g. base stations access point devices per se H04W88/08
• CPC Class Codes: H04W 52/146 Uplink power control
• 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 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

An embodiment of the present invention discloses a power control method, including: obtaining, by a UE, configuration information, where the configuration information includes a configuration parameter of at least one Scell configured by a base station for the UE; setting, by the UE, an initial power adjustment value of the Scell according to the configuration parameter of the Scell in the configuration information; and controlling, by the UE, transmit power on the Scell according to the set initial power adjustment value of the Scell. Correspondingly, an embodiment of the present invention further discloses an activation management method, a UE, and a base station. By using the present invention, transmit power of a UE on an Scell can be accurately controlled, thereby ensuring accuracy of data transmission.

Claims

1. An activation management method, comprising:

obtaining, by a user equipment(UE), configuration information, wherein the configuration information comprises a configuration parameter of at least one secondary carrier(Scell) configured by a base station for the UE; and

performing, by the UE, activation processing for the at least one Scell according to an activation management command delivered by the base station.

2. The method according to claim 1, wherein the configuration information further comprises grouping information of the at least one Scell, wherein the grouping information is used to indicate that the at least one Scell is subordinate to at least one Scell group;

and

the performing, by the UE, activation processing for the at least one Scell according to an activation management command delivered by the base station specifically comprises;

performing, by the UE, activation processing for Scells in the Scell group according to the activation management command delivered by the base station;

wherein the activation management command comprises any one or more of an activation command, an random access(RA) instruction, a deactivation command, a deactivation timer, and a synchronization timer.

3. The method according to claim 2, wherein the performing, by the UE, activation processing for Scells in the Scell group according to an activation management command delivered by the base station specifically comprises:

activating, by the UE, a downlink carrier and/or an uplink carrier of an SRCell that needs activation in the Scell group according to the activation command delivered by the base station, to cause the secondary access carrier(SRCell) to enter an active state.

4. The method according to claim 3, wherein the performing, by the UE, activation processing for Scells in the Scell group according to an activation management command delivered by the base station further comprises:

activating, by the UE, downlink carriers and/or uplink carriers of other Scells that need activation in the Scell group according to the activation command delivered by the base station at the same time when the SRCell enters the active state or after a preset time of delay, to cause the other Scells to enter the active state.

5. The method according to claim 4, wherein, if the UE activates an uplink carrier of the SRCell that needs activation in the Scell group to cause the SRCell to enter the active state, the performing, by the UE, activation processing for Scells in the Scell group according to an activation management command delivered by the base station further comprises:

initiating, by the UE, an RA on an uplink carrier of the SRCell according to an RA instruction delivered by the base station, wherein, at the same time when the RA is successful or after a preset time of delay, or at the same time when the UE receives an RAR message in the RA process or after a preset time of delay, the SRCell enters a synchronized state; and

at the same time when the SRCell enters the synchronized state or after a preset time of delay, the other Scells enter the synchronized state.

6. The method according to claim 5, wherein the initiating, by the UE, an RA on an uplink carrier of the SRCell according to an RA instruction delivered by the base station specifically comprises:

if the SRCell is subordinate to at least one Scell group, selecting, by the UE, one SRCell from each Scell group according to the RA instruction delivered by the base station, and initiating an RA on the selected SRCells according to a preset sequence;

or, selecting, by the UE, one SRCell from each Scell group according to the RA instruction, and initiating an RA on the selected SRCells concurrently,

wherein the preset sequence may comprise any one of an identity sequence of the Scell groups, a configuration sequence of the Scell groups, an identity sequence of the selected SRCells, a configuration sequence of the selected SRCells, and a channel quality sequence of the selected SRCells.

7. The method according to claim 2, wherein the performing, by the UE, activation processing for Scells in the Scell group according to an activation management command delivered by the base station specifically comprises:

deactivating, by the UE, an SRCell that needs deactivation in the Scell group according to a deactivation command delivered by the base station, and at the same time when the SRCell is deactivated or after a preset time of delay, performing deactivation for other Scells that need deactivation in the Scell group.

8. The method according to claim 2, wherein, if the base station configures a deactivation timer for each Scell group, the performing, by the UE, activation processing for Scells in the Scell group according to an activation management command delivered by the base station specifically comprises:

if it is detected that a deactivation timer configured by the base station for any one Scell group expires, deactivating, by the UE, Scells in the Scell group corresponding to the expired deactivation timer; and

re-starting, by the UE, the deactivation timer corresponding to the Scell group when the UE receives resource allocation on any one Scell of any one Scell group.

9. The method according to claim 2, wherein, if the base station configures deactivation timers respectively for all SRCells and all secondary ordinary carriers(SOCells) in each Scell group, the performing, by the UE, activation processing for Scells in the Scell group according to an activation management command delivered by the base station specifically comprises:

if it is detected that a deactivation timer configured by the base station for all SRCells in any one Scell group expires, deactivating, by the UE, the SRCell in the Scell group corresponding to the expired deactivation timer immediately or after a preset time of delay;

if it is detected that a deactivation timer configured by the base station for all SOCells in any one Scell group expires, deactivating, by the UE, the SOCell in the Scell group corresponding to the expired deactivation timer immediately or after a preset time of delay;

when the UE receives resource allocation on any one SRCell in each Scell group, re-starting, by the UE, the deactivation timer corresponding to the SRCell; and

when the UE receives resource allocation on any one SOCell in each Scell group, re-starting, by the UE, the deactivation timer corresponding to the SOCell.

10. The method according to claim 2, wherein, if the base station configures a deactivation timer for each Scell in each Scell group, the performing, by the UE, activation processing for Scells in the Scell group according to the activation management command delivered by the base station specifically comprises:

if it is detected that a deactivation timer configured by the base station for any one Scell in any one Scell group expires, deactivating, by the UE, the Scell corresponding to the expired deactivation timer immediately or after a preset time of delay; and

when the UE receives resource allocation on any one Scell in each Scell group, re-starting, by the UE, the deactivation timer corresponding to the Scell.

11. The method according to claim 2, wherein, if the base station configures a synchronization timer for each Scell group, the performing, by the UE, activation processing for Scells in the Scell group according to the activation management command delivered by the base station specifically comprises:

if it is detected that a synchronization timer configured by base station for any one Scell group expires, causing Scells in the Scell group corresponding to the expired synchronization timer to enter an out-of-synchronization state immediately or after a preset time of delay; and

when the UE receives a timing advance command sent by the base station, re-starting, by the UE, the synchronization timer corresponding to the Scell group.

12. The method according to claim 2, wherein, if the base station configures a synchronization timer for all SRCells in each Scell group, the performing, by the UE, activation processing for Scells in the Scell group according to the activation management command delivered by the base station specifically comprises:

if it is detected that a synchronization timer configured by the base station for all SRCells in any one Scell group expires, causing the SRCells in the Scell group corresponding to the expired synchronization timer to enter an out-of-synchronization state immediately or after a preset time of delay, and causing SOCells in the Scell group to enter the out-of-synchronization state at the same time when the SRCells enter the out-of-synchronization state or after a preset time of delay; and

when the UE receives a timing advance command sent by the base station, re-starting, by the UE, the synchronization timer corresponding to the SRCells in the Scell group.

13. The method according to claim 2, wherein, if the base station configures a deactivation timer for each Scell in each Scell group, the performing, by the UE, activation processing for Scells in the Scell group according to the activation management command delivered by the base station specifically comprises:

if it is detected that a synchronization timer configured by the base station for any one SRCell in any one Scell group expires, causing the SRCell corresponding to the expired synchronization timer to enter an out-of-synchronization state immediately or after a preset time of delay; and

when the UE receives a timing advance command sent by the base station, re-starting, by the UE, the synchronization timer corresponding to the SRCell.

14. A user equipment UE, comprising:

an obtaining module, adapted to obtain configuration information, wherein the configuration information comprises a configuration parameter of at least one Scell configured by a base station for the UE; and

a setting module, adapted to set an initial power adjustment value of the Scell according to the configuration parameter of the Scell in the configuration information obtained by the obtaining module; and

a control module, adapted to control a transmit power of the UE on the Scell according to the initial power adjustment value of the Scell set by the setting module.

15. The UE according to claim 14, wherein the Scell comprises an SRCell and/or an SOCell;

a configuration parameter of the SRCell comprises RA configuration information, or RA configuration information and a power control parameter; and

a configuration parameter of the SOCell comprises a power control parameter, wherein,

the power control parameter comprises a configuration parameter for uplink power calculation; and

the RA configuration information comprises any one or more of PRACH configuration information, a preamble initial received target power, preamble format information, and an RA power ramping step; and

the configuration information further comprises grouping information of the at least one Scell, wherein the grouping information is used to indicate that the at least one Scell is subordinate to at least one Scell group.

16. The UE according to claim 15, wherein the setting module is specifically adapted to, when the UE meets a setting condition, set an initial power adjustment value of the Scell according to the configuration parameter of the Scell in the configuration information obtained by the obtaining module,

wherein the setting condition may be any one or more of following conditions:

any one Scell in one Scell group is activated, wherein the one Scell being activated comprises;

a downlink carrier of the Scell and/or an uplink carrier of the Scell are/is activated;

an RA initiated by the UE on any one SRCell in one Scell group is successful;

the UE receives an RAR message for an RA initiated by the UE on any one SRCell in one Scell group; and

the UE is in an RA process initiated by the UE on any one SRCell in one Scell group before a first message is sent.

17. The UE according to claim 16, wherein the setting module comprises:

a first setting unit, adapted to, if the UE initiates an RA on any one SRCell in one Scell group, set a PUSCH initial power adjustment value of the SRCell where the RA is initiated in the Scell group to f_c(0)=Δ

P_rampup+δ

_msg2; and

/or set a PUCCH initial power adjustment value of the SRCell where the RA is initiated in the Scell group to g_c(0)=Δ

P_rampup+δ

_msg2;

a second setting unit, adapted to, if the UE initiates an RA on any one SRCell in one Scell group, set a PUSCH initial power adjustment value f_c(0) of an Scell where no RA is initiated in the Scell group to 0; and

/or set a PUCCH initial power adjustment value g_c(0) of an Scell where no RA is initiated in the Scell group to 0;

wherein the Scell where no RA is initiated in the Scell group comprises an SRCell and an SOCell where no RA is initiated in the Scell group;

wherein Δ

P_rampup is a total power ramping value of the UE obtained according to the RA configuration information of the SRCell in the RA process; and

δ

_msg2 is a power adjustment value represented by a transmit power control command TPC Command included in the RAR message received by the UE from the base station in the RA process.

18. The UE according to claim 16, wherein the setting module further comprises:

a judging unit, adapted to, if the obtaining module obtains configuration information again, compare a configuration parameter for uplink power calculation of the Scell in the obtained configuration information with a configuration parameter for uplink power calculation of the Scell in the last obtained configuration information, and judge whether the configuration parameter for uplink power calculation is changed; and

a third setting unit, adapted to, when the judging unit judges that the configuration parameter for uplink power calculation is changed, set a PUSCH initial power adjustment value f_c(0) of the Scell with the changed configuration parameter for uplink power calculation to 0, and/or set a PUCCH initial power adjustment value g_c(0) of the Scell with the changed configuration parameter for uplink power calculation to 0.

19. The UE according to claim 18, wherein the control module comprises:

a first calculating unit, adapted to calculate, according to the f_c(0) of the Scell set by the setting module 102 and based on a PUSCH transmit power calculation formula, a PUSCH transmit power value of the UE on the Scell;

a second calculating unit, adapted to calculate, according to the g_c(0) of the Scell set by the setting module and based on a PUCCH transmit power calculation formula, a PUCCH transmit power value of the UE on the Scell; and

a power control unit, adapted to control a PUSCH and/or PUCCH uplink transmit power(s) of the UE on the SCell according to the transmit power values obtained by the first calculating unit and the second calculating unit through calculation.