CN102300321B - Power headroom reporting (PHR) method, system and device in multicarrier polymerization system - Google Patents
Power headroom reporting (PHR) method, system and device in multicarrier polymerization system Download PDFInfo
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Abstract
The invention discloses a power headroom reporting (PHR) method, system and device in a multilayer polymerization system, relating to the field of wireless communication and being used for improving accuracy of dispatching an uplink member carrier by a network side in the multicarrier polymerization system. In the invention, when a terminal receives an RRC (Radio Resource Control) reconfiguration signaling sent by a base station, triggering for carrying out PHR, determining a PH (Power Headroom) value needing to be reported, and reporting the determined PH value to the base station, wherein the RRC reconfiguration signaling carries information of the uplink member carrier newly added in the terminal. Therefore, by adopting the invention, when the terminal receives the RRC reconfiguration signaling, which is sent by the base station, of the uplink member carrier newly added in the terminal, the PHR is triggered to be reported, so that the network can more accurately schedule an uplink CC (Component Carrier) according to the reported PHR, and the system performance is further improved.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method, a system, and a device for reporting power headroom in a multi-carrier aggregation system.
Background
A Long Term Evolution (LTE) system has a Power Headroom Reporting (PHR) mechanism, which requires a terminal (UE) to report a Power Headroom (PH) under certain conditions.
The relevant definitions of PHR are presented below:
the PH is a difference between a maximum transmission power allowed to be used by the UE on the system bandwidth and an estimated transmission power, and the PH calculation formula is as follows:
PH＝PCMAX-PPUSCH；
wherein, PCMAXIs the maximum transmit power, P, allowed by the UE to use over the system bandwidthPUSCHIs the power used by the Physical Uplink Shared Channel (PUSCH) carrying the PH information.
The configuration of parameters related to the PHR is described below:
the purpose of the PHR is to inform the base station (eNB) of the difference between the UE maximum transmit power and the UE estimated uplink shared channel (UL-SCH) transmit power. Relevant parameters required for the UE to perform PHR are configured by a Radio Resource Control (RRC) layer, and the relevant parameters mainly include the following timer parameters: a length of a periodic PHR-Timer, a length of a forbidden PHR-Timer, and a path loss change parameter (dl-pathloss change) that triggers PHR. See table below:
phr-Config CHOICE{
release NULL，
setup SEQUENCE{
periodicPHR-Timer ENUMERATED{sf10，sf20，
sf50，sf100，sf200，sf500，sf1000，infinity}，
// description: sf10 indicates that the period of periodicPHR-Timer is 10 subframes,
in turn and so on
prohibitPHR-Timer ENUMERATED{sf0，sf10，
sf20，sf50，sf100，sf200，sf500，sf1000}，
// description: sf10 indicates that the period of prohibitPHR-Timer is 10 sub-frames, and so on
dl-PathlossChange ENUMERATED{dB1，dB3，dB6，
infinity}
// description: dB1 represents that dl-PathlossChange takes 1dB, and so on
}
The triggering mechanism of PHR is described below:
the terminal can be triggered to perform PHR as long as one of the following conditions is met:
the first condition is as follows: when UE has available uplink resources, the prohibitPHR-Timer is overtime and the reported path loss change from the nearest PHR exceeds dl-pathlossChange dB;
and a second condition: the periodicPHR-Timer times out;
and (3) carrying out a third condition: and the high level of the base station allocates the PHR function for the terminal for the first time or reallocates the PHR function for the terminal.
The reporting format of PHR is described below:
in the LTE system, PHR reporting uses one Medium Access Control (MAC) subheader and one PHR MAC CE (PHR MAC control element), where the MAC subheader is shown in fig. 1 and the PHR MAC CE is shown in fig. 2.
Wherein the meaning of each domain is as follows:
a Logical Channel Identification (LCID) field for identifying a Logical Channel number of the corresponding payload part, and for the PHR, the LCID for identifying the corresponding payload part as the PH.
E: an extension bit for indicating whether the next byte (byte) is a MAC subheader or a MAC payload.
R: the bits are reserved.
pH: and (4) uplink power allowance.
The reporting process of PHR is described as follows:
if the UE has an uplink available resource, once the PHR is triggered, if the uplink resource currently allocated to the UE can accommodate one PHR MAC CE and a MAC subheader corresponding to the PHR MAC CE, then: informing a physical layer to calculate a PH value; notifying a Multiplexing and assembling (Multiplexing and assembling) process to generate a PHR MAC CE, and sending the PHR MAC CE and a corresponding MAC subheader to a base station; starting/restarting periodicPHR-Timer; starting/restarting prohibitprr-Timer; all triggered PHRs are cancelled.
The CA system is described below:
the peak rate of a long term evolution Advanced (LTE-a) system is greatly improved compared with LTE, and is required to reach 1Gbps downlink and 500Mbps uplink. Meanwhile, the LTE-A system has good compatibility with the LTE system. LTE-a systems introduce Carrier Aggregation (CA) techniques based on the need to increase peak rates, be compatible with LTE systems, and fully utilize spectrum resources.
The carrier aggregation technique refers to a mode in which uplink and downlink in one cell each include a plurality of Component Carriers (CCs), instead of only one set of carriers in the LTE system and the previous wireless communication system. In a carrier aggregation system, each component carrier may be continuous or discontinuous, the bandwidth between component carriers may be the same or different, in order to maintain compatibility with the LTE system, the maximum bandwidth of each component carrier is limited to 20MHz, and currently, the maximum number of CCs is generally considered to be 5.
For a multi-carrier system, the UE may have one Power Amplifier (PA) or multiple PAs, and each PA may be configured with a maximum transmit Power PMAXMaximum transmission power P of a PAMAXAll CCs supported by the PA are shared, and different PAs can be configured with different maximum transmission power PMAX。
In the CA system, the base station configures/reconfigures the number of CCs actually aggregated by the UE according to the traffic of the UE, for example: if the traffic of the UE is increased and the current CC can not meet the transmission requirement, the number of the CCs configured for the UE can be increased through RRC reconfiguration signaling; if the traffic of the UE is reduced, the number of CCs configured for the UE can be reduced through RRC reconfiguration signaling. RRC reconfiguration typically employs delta configuration (delta configuration), i.e. some UE or CC specific configuration information that has been configured before does not need to be reconfigured if it does not need to be changed.
The following describes PHR parameter configuration in a CA system:
in the current CA system, the RRC layer may configure PHR parameters (including periodicPHR-Timer, prohibitPHR-Timer, dl-pathsschange) based on CC or UE. When configuring the PHR parameter based on the CC, each CC uses the PHR parameter configured for the CC. When configuring the PHR parameter based on the UE, all CCs of the UE use the configured set of PHR parameters.
The following describes the maintenance scheme of PHR parameters in CA system:
at present, two schemes are mainly adopted for PHR parameter maintenance in a CA system:
scheme 1: the PHR parameter is based on CC maintenance.
Namely, PHR triggering and reporting are carried out on each CC according to a PHR mechanism of LTE.
Scheme 2: the PHR parameter is based on UE maintenance.
That is, as long as there is a CC to trigger the PHR, the UE reports the PHR together, and starts/restarts the periodicPHR-Timer and the prohibitpyr-Timer.
In the process of implementing the invention, the inventor finds that the following technical problems exist in the prior art:
after the CA technology is introduced, when the traffic volume of the UE increases, the base station needs to increase the number of uplink CCs aggregated for the UE through the RRC reconfiguration process. If the RRC reconfiguration signaling for increasing the number of uplink CCs in the CA system adopts a delta configuration mode, that is, the newly added uplink CCs and some specific parameters thereof are configured for the terminal only through the RRC reconfiguration signaling, and the PHR function does not need to be reconfigured for the terminal through the RRC reconfiguration signaling, then according to the existing PHR trigger mechanism, the terminal does not need to trigger the PHR, which obviously affects the accuracy of scheduling on the uplink CCs.
Disclosure of Invention
The embodiment of the invention provides a PHR method, a PHR system and PHR equipment in a multi-carrier aggregation system, which are used for improving the accuracy of scheduling uplink member carriers by a network side in the multi-carrier aggregation system.
A PHR method in a multi-carrier aggregation system, the method comprising:
a terminal receives a Radio Resource Control (RRC) reconfiguration signaling which is sent by a base station and carries information of uplink member carriers newly added for the terminal;
the terminal triggers PHR and determines the PH value of the power headroom to be reported;
and the terminal reports the determined PH value to the base station.
A terminal, the terminal comprising:
a receiving unit, configured to receive a radio resource control RRC reconfiguration signaling sent by a base station and carrying information of an uplink component carrier newly added to the terminal;
the PHR triggering unit is used for triggering PHR and determining the PH value of the power headroom to be reported;
and the PH reporting unit is used for reporting the PH value determined by the PHR triggering unit to a base station.
A multi-carrier aggregation communication system, the system comprising:
the base station is used for sending a Radio Resource Control (RRC) reconfiguration signaling carrying information of the newly added uplink member carrier to the terminal after determining that the uplink member carrier needs to be newly added to the terminal according to the current service volume of the terminal;
the terminal is used for receiving the RRC reconfiguration signaling, triggering PHR and determining a power headroom PH value needing to be reported; and reporting the determined PH value to a base station.
In the invention, when the terminal receives the RRC reconfiguration signaling which is sent by the base station and adds the uplink component carrier wave to the terminal, the PHR is triggered, the PH value which needs to be reported is determined, and the determined PH value is reported to the base station.
Drawings
FIG. 1 is a diagram of a MAC subheader in the prior art;
FIG. 2 is a diagram of a PHR MAC CE in the prior art;
FIG. 3 is a schematic flow chart of a method provided by an embodiment of the present invention;
fig. 4A is a diagram illustrating a PHR MAC CE in an embodiment of the present invention;
fig. 4B is a diagram of another PHR MAC CE in an embodiment of the invention;
FIG. 5 is a schematic diagram of a system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In order to improve the accuracy of scheduling uplink CC by a network side in a multi-carrier aggregation system, an embodiment of the present invention provides a method for PHR in a multi-carrier aggregation system.
Referring to fig. 3, the PHR method in the multi-carrier aggregation system provided in the embodiment of the present invention specifically includes the following steps:
step 30: a terminal receives an RRC reconfiguration signaling which is sent by a base station and carries information of an uplink member carrier newly added for the terminal;
step 31: the terminal triggers PHR and determines the PH value to be reported;
step 32: and the terminal reports the determined PH value to the base station.
In step 30, the terminal determines the PH value to be reported, and the specific implementation may adopt the following three ways:
the first method comprises the following steps: the terminal calculates the PH value of the uplink member carrier newly added by the RRC reconfiguration signaling, and determines the PH value as the PH value to be reported;
and the second method comprises the following steps: the terminal respectively calculates the PH value of each uplink member carrier supported by the terminal, and determines each calculated PH value as the PH value to be reported;
and thirdly, the terminal calculates the total PH value of all the uplink member carriers supported by the terminal and determines the total PH value as the PH value to be reported.
In the first and second manners, the PH value of an uplink component carrier is calculated according to the following formula:
PH＝PCMAX-PCC，
wherein, PCMAXIs the maximum transmit power, P, configured for the PA corresponding to the uplink component carrierCCAnd transmitting the uplink transmission power of the PH subframe on the uplink component carrier.
In the third method, the total PH values of all uplink component carriers supported by itself are calculated according to the following formula:
PH＝PCMAX-∑PCC；
wherein, PCMAXFor the maximum transmit power, SIG P, that the terminal is allowed to use over the system bandwidthCCAnd sending the total uplink transmission power of the subframe used by the PH value to the base station for the terminal.
Preferably, after sending the calculated PH value of the newly added uplink component carrier to the base station, the terminal may also cancel all PHR triggered on the newly added uplink component carrier, and start a PHR prohibition timer and a periodic PHR timer set for the newly added uplink component carrier.
Preferably, after sending the calculated PH value of each uplink component carrier supported by the terminal or the total PH value of all uplink component carriers supported by the terminal to the base station, the terminal may also cancel the PHR triggered on all uplink component carriers supported by the terminal, and start the PHR prohibition timer and the periodic PHR timer set for the terminal.
In step 32, when the terminal reports the determined PH value to the base station, the terminal may carry the PH value in the PHR MAC CE, and send the PHR MAC CE and the corresponding MAC subheader to the base station, and the base station schedules the uplink CC according to the PH value after resolving the PH value in the PHR MAC CE.
The resources used when the terminal reports the PH value to the base station specifically have the following two conditions:
firstly, a terminal sends a determined PH value to a base station on a first uplink scheduling time-frequency resource; the first uplink scheduling time-frequency resource is a time-frequency resource which is used for bearing a PHR MAC CE carrying a PH value and a corresponding MAC subheader on a newly added uplink member carrier after a terminal triggers PHR;
secondly, the terminal sends the determined PH value to the base station on a second uplink scheduling time-frequency resource; and the second uplink scheduling time-frequency resource is the time-frequency resource which is used for bearing the PHR MAC CE carrying the PH value and the corresponding MAC subheader on the first aggregated member carrier after the terminal triggers PHR.
The following examples illustrate:
the first embodiment is as follows:
when the terminal maintains the PHR parameters based on the uplink member carrier, the terminal calculates the PH value of the newly added uplink member carrier and determines the PH value as the PH value needing to be reported; and then, sending the determined PH value to the base station through the newly added uplink component carrier. Specifically, the terminal sends the determined PH value to the base station on the first uplink scheduling time-frequency resource; the first uplink scheduling time-frequency resource is a time-frequency resource which is used for bearing a PHR MAC CE carrying a PH value and a corresponding MAC subheader on a newly added uplink member carrier after a terminal triggers PHR.
After the terminal sends the determined PH value to the base station, the terminal cancels all PHRs triggered on the newly added uplink component carrier, and starts a PHR prohibition timer and a PHR period timer which are set for the newly added uplink component carrier. And subsequently triggering the PHR of the newly added uplink component carrier when one of the following three conditions is met, namely reporting the PH value of the uplink component carrier to the base station through the newly added uplink component carrier:
the first condition is as follows: when UE has available uplink resources, the prohibitPHR-Timer is overtime and the reported path loss change from the nearest PHR exceeds dl-pathlossChange dB;
and a second condition: the periodicPHR-Timer times out;
and (3) carrying out a third condition: and the high level of the base station allocates the PHR function for the terminal for the first time or reallocates the PHR function for the terminal.
Example two:
when a terminal maintains PHR parameters based on the terminal, the terminal respectively calculates the PH values of each uplink member carrier supported by the terminal, and determines each calculated PH value as a PH value to be reported; and then, the terminal sends the determined PH value to the base station through the newly added uplink component carrier or other uplink component carriers supported by the terminal. Specifically, the terminal sends the determined PH value to the base station on the first uplink scheduling time-frequency resource; the first uplink scheduling time-frequency resource is a time-frequency resource which is used for bearing a PHR MAC CE carrying a PH value and a corresponding MAC subheader on a newly added uplink member carrier after a terminal triggers PHR; or the terminal sends the determined PH value to the base station on the second uplink scheduling time-frequency resource; and the second uplink scheduling time-frequency resource is the time-frequency resource which is used for bearing the PHR MAC CE carrying the PH value and the corresponding MAC subheader on the first aggregated member carrier after the terminal triggers PHR.
After the terminal sends the determined PH value to the base station, the terminal cancels the PHR triggered on all the supported uplink member carriers, and starts a PHR forbidding timer and a periodic PHR timer which are set for the terminal. And subsequently, when one of the following four conditions is met, triggering the terminal to perform PHR, namely reporting the PH value of each uplink member carrier supported by the terminal to the base station through any available uplink member carrier:
the first condition is as follows: when UE has available uplink resources, the prohibitPHR-Timer is overtime and the reported path loss change from the nearest PHR exceeds dl-pathlossChange dB;
and a second condition: the periodicPHR-Timer times out;
and (3) carrying out a third condition: and the high level of the base station allocates the PHR function for the terminal for the first time or reallocates the PHR function for the terminal.
And a fourth condition: the high layer is already configured with a PHR function and is triggered when an uplink CC is newly added for the terminal.
Example three:
when a terminal maintains PHR parameters based on the terminal, the terminal calculates the total PH values of all uplink member carriers supported by the terminal, and determines the calculated total PH value as the PH value to be reported; and then, the terminal sends the determined PH value to the base station through the newly added uplink component carrier or other uplink component carriers supported by the terminal. Specifically, the terminal sends the determined PH value to the base station on the first uplink scheduling time-frequency resource; the first uplink scheduling time-frequency resource is a time-frequency resource which is used for bearing a PHR MAC CE carrying a PH value and a corresponding MAC subheader on a newly added uplink member carrier after a terminal triggers PHR; or the terminal sends the determined PH value to the base station on the second uplink scheduling time-frequency resource; and the second uplink scheduling time-frequency resource is the time-frequency resource which is used for bearing the PHR MAC CE carrying the PH value and the corresponding MAC subheader on the first aggregated member carrier after the terminal triggers PHR.
After the terminal sends the determined PH value to the base station, the terminal cancels the PHR triggered on all the supported uplink member carriers, and starts a PHR forbidding timer and a periodic PHR timer which are set for the terminal. And subsequently, when one of the following four conditions is met, triggering the terminal to perform PHR, namely reporting the total PH value of all uplink component carriers supported by the terminal to the base station through any available uplink component carrier:
the first condition is as follows: when UE has available uplink resources, the prohibitPHR-Timer is overtime and the reported path loss change from the nearest PHR exceeds dl-pathlossChange dB;
and a second condition: the periodicPHR-Timer times out;
and (3) carrying out a third condition: and the high level of the base station allocates the PHR function for the terminal for the first time or reallocates the PHR function for the terminal.
And a fourth condition: the high layer is already configured with a PHR function and is triggered when an uplink CC is newly added for the terminal.
The invention is illustrated below with reference to specific examples:
the core idea of the invention is as follows: when a network side under the CA newly adds an uplink CC for the terminal, the power headroom report needs to be triggered even if the PHR function does not need to be reconfigured for the terminal.
Based on the core idea, if the terminal maintains the PHR parameter based on the CC, the PHR trigger condition on each uplink CC under the CA is as follows:
if the uplink CC has available uplink resources, setting a prohibitPHR-Timer aiming at the uplink CC to be overtime and reporting a path loss change more than dl-pathlossChange dB from the latest PHR; or,
setting periodicPHR-Timer overtime aiming at the uplink CC; or,
the high level of the base station primarily configures the PHR function for the terminal or reconfigures the PHR function for the terminal; or,
the high layer of the base station configures the PHR function for the terminal, and if an uplink CC is newly added for the terminal, the PHR on the uplink CC is triggered.
Based on the core idea, if the terminal maintains the PHR parameter based on the UE, the PHR trigger condition of the UE under CA is as follows:
UE has available uplink resources, a prohibitPHR-Timer set for the terminal is overtime, and the change of path loss reported by the PHR from the last time exceeds dl-pathlossChange dB; or,
setting periodicPHR-Timer timeout for the terminal; or,
the high level of the base station primarily configures the PHR function for the terminal or reconfigures the PHR function for the terminal; or,
the high level of the base station is configured with a PHR function, and if the base station is an uplink CC newly added to the terminal, the UE is triggered to perform PHR.
It should be noted that when the terminal maintains the PHR parameter based on the UE, there are two possible cases, as follows:
case 1: UE reports only one PH value at a time by PHR, and does not distinguish CC;
case 2: reporting a plurality of PH values by the UE through PHR once, wherein one PH value corresponds to one CC;
for case 1, the PHR MAC CE format does not need to be modified;
for case 2, once the UE has a PHR triggered, if the PHR MAC CE needs to carry PH values on all CCs, the format of the PHR MAC CE needs to be modified, for example, the modified format may be as shown in fig. 4A or fig. 4B.
The first embodiment is as follows:
in this embodiment, the base station configures the PHR parameter based on the UE, the terminal maintains the PHR parameter based on the CC, and when an uplink CC is newly added, the PHR on the CC needs to be triggered;
step 1: the base station configures PHR related parameters (including periodicPHR-Timer, prohibitPHR-Timer and dl-pathlength change) based on the UE, and informs the UE through RRC signaling;
step 2: the UE independently judges whether the CC triggers the PHR or not according to three PHR triggering conditions on each uplink CC, and the PH reporting on the CC is triggered as long as one of the following three triggering conditions is met on a certain uplink CC;
the first condition is as follows: if the uplink CC has available uplink resources, setting a prohibitPHR-Timer for the uplink CC to be overtime and reporting the change of the path loss to be more than dl-pathlossChange dB from the latest PH;
and a second condition: setting periodicPHR-Timer overtime for the uplink CC;
and (3) carrying out a third condition: the high level of the base station primarily configures the PHR function for the terminal or reconfigures the PHR function for the terminal;
and step 3: when the UE has data burst at a certain moment and the current CC can not meet the transmission requirement, the base station adds an uplink CC (UL CC) for the UE according to the traffic of the UE and informs the UE through RRC reconfiguration signaling (in a delta signaling mode);
and 4, step 4: after receiving the RRC reconfiguration signaling, the UE triggers the reporting of the PH on the newly added CC according to the following PHR triggering conditions;
and a fourth condition: the high layer of the base station configures a PHR function for the terminal, and if an uplink CC is newly added for the terminal, the PHR on the uplink CC is triggered;
and 5: at the moment that the first one of the newly added CCs can bear the PHR (including the PHR MAC CE and the PHR MAC subheader), the MAC layer of the UE generates the PHR MAC CE according to the PH value calculated by the physical layer, sends the PHR on the resource indicated by the UL grant which can bear the PHR on the first one of the CCs, and cancels all the PHRs triggered on the CC;
step 6: and starting or restarting prohibitPHR-Timer and periodicPHR-Timer set for the newly added CC.
Example two:
in this embodiment, the base station configures the PHR parameter based on the UE, the terminal maintains the PHR parameter based on the UE, and the PHs of all uplink CCs are reported at the same time as long as one uplink CC is triggered by the PHR parameter. When an uplink CC is newly added, UE needs to be triggered to perform PHR;
step 1: the base station configures PHR related parameters (periodicPHR-Timer, prohibitPHR-Timer and dl-pathlength change) based on the UE and informs the UE through RRC signaling;
step 2: the UE independently judges whether the CC triggers the PHR according to three PHR triggering conditions on each uplink CC, and triggers the UE to report the PH if one of the following three triggering conditions is met;
the first condition is as follows: the UE has available uplink resources, the prohibitPHR-Timer set for the UE is overtime, and the change of the path loss from the last PH report exceeds dl-pathlossChange dB;
and a second condition: setting periodicPHR-Timer timeout for UE;
and (3) carrying out a third condition: the high level of the base station primarily configures the PHR function for the terminal or reconfigures the PHR function for the terminal;
and step 3: when the UE has data burst at a certain moment and the current CC can not meet the transmission requirement, the base station adds an uplink CC (UL CC) for the UE according to the traffic of the UE and informs the UE through RRC reconfiguration signaling (in a delta signaling mode);
and 4, step 4: after receiving the RRC reconfiguration signaling, the UE triggers the UE to carry out PH reporting according to the following PHR triggering conditions;
and a fourth condition: the high layer of the base station configures a PHR function for the terminal, and if an uplink CC is newly added for the terminal, the UE is triggered to carry out PHR;
it should be noted that, in this embodiment, each uplink CC independently calculates a PH value according to a PH calculation method in the LTE system, and a PHR format of the UE needs to be modified, that is, one PHR MAC CE needs to include PH values on all CCs, as shown in fig. 4A or fig. 4B.
And 5: at the time when the first of the newly added CCs can carry the PHR (including the PHR MAC CE and the PHR MAC subheader) this time or the first of all available uplink CCs can carry the PHR, the MAC layer of the UE generates the PHR MAC CE according to the PH calculated by the physical layer, sends the PHR on the resource indicated by the UL grant which can contain the PHR on the selected CC first, and cancels the PHR triggered on all uplink CCs;
step 6: and starting or restarting prohibitPHR-Timer and periodicPHR-Timer set for the UE.
Example three:
in this embodiment, the base station configures the PHR parameter based on the UE, the terminal maintains the PHR parameter based on the UE, and the UE needs to be triggered to perform PHR when an uplink CC is newly added;
step 1: the base station configures PHR related parameters (periodicPHR-Timer, prohibitPHR-Timer and dl-pathlength change) based on the UE and informs the UE through RRC signaling;
step 2: the UE independently judges whether the CC triggers the PHR report according to three conditions triggered by the PHR on each uplink CC, and triggers the UE to carry out the PH report as long as one of the following three triggering conditions is met:
the first condition is as follows: the UE has available uplink resources, the prohibitPHR-Timer set for the UE is overtime, and the change of the path loss from the last PH report exceeds dl-pathlossChange dB;
and a second condition: setting periodicPHR-Timer timeout for UE;
and (3) carrying out a third condition: the high level of the base station primarily configures the PHR function for the terminal or reconfigures the PHR function for the terminal;
the PH was calculated according to the following formula:
PH＝PCMAX-∑PCC(Total uplink Transmission Power of subframe transmitting PHR)
And step 3: when the UE has data burst at a certain moment and the current CC can not meet the transmission requirement, the base station adds an uplink CC (UL CC) for the UE according to the traffic of the UE and informs the UE through RRC reconfiguration signaling (in a delta signaling mode);
and 4, step 4: after receiving the RRC reconfiguration signaling, the UE triggers the UE to carry out PH reporting according to the following PHR triggering conditions;
and a fourth condition: the high layer of the base station configures a PHR function for the terminal, and if an uplink CC is newly added for the terminal, the UE is triggered to carry out PHR;
and 5: at the moment that the first one of all available CCs of the UE can carry the PHR (including the PHR MAC CE and the PHR MAC subheader), the MAC layer of the UE generates the PHR MAC CE according to the PH calculated by the physical layer, and sends the PHR on the resource indicated by the UL grant on the selected CC, and cancels all triggered PHR of the UE;
step 6: and starting or restarting prohibitPHR-Timer and periodicPHR-Timer set for the UE.
Referring to fig. 5, an embodiment of the present invention further provides a wireless communication system, where the system includes:
the base station 50 is configured to send a radio resource control RRC reconfiguration signaling carrying information of a newly added uplink component carrier to the terminal after determining that the uplink component carrier needs to be newly added to the terminal according to the current traffic of the terminal;
the terminal 51 is configured to receive the RRC reconfiguration signaling, trigger PHR, and determine a power headroom PH value to be reported; and reporting the determined PH value to a base station.
The terminal 51 is configured to:
calculating the PH value of the newly added uplink member carrier, and determining the PH value as the PH value to be reported; or,
respectively calculating the PH values of the uplink member carriers supported by the user equipment, and determining the calculated PH values as the PH values to be reported; or,
and calculating the total PH value of all the uplink member carriers supported by the carrier self, and determining the total PH value as the PH value to be reported.
The terminal 51 is configured to:
on the first uplink scheduling time-frequency resource, sending the determined PH value to a base station; the first uplink scheduling time-frequency resource is a time-frequency resource which is used for bearing a PHR MAC CE carrying the PH value and a corresponding MAC subheader on a newly added uplink member carrier after the terminal triggers PHR; or,
on the second uplink scheduling time frequency resource, sending the determined PH value to the base station; and the second uplink scheduling time-frequency resource is the time-frequency resource which is used for bearing the PHR MAC CE carrying the PH value and the corresponding MAC subheader on the first aggregated member carrier after the terminal triggers PHR.
The RRC reconfiguration signaling is delta configuration signaling.
Referring to fig. 6, an embodiment of the present invention further provides a terminal, which may be applied to the foregoing wireless communication system, where the terminal includes:
a reconfiguration signaling receiving unit 60, configured to receive a radio resource control RRC reconfiguration signaling sent by the base station and carrying information of an uplink component carrier newly added to the terminal;
a PHR trigger unit 61, configured to trigger PHR, and determine a power headroom PH value to be reported;
a PH reporting unit 62, configured to report the PH value determined by the PHR trigger unit to a base station.
The PHR trigger unit 61 is configured to:
calculating the PH value of the newly added uplink member carrier, and determining the PH value as the PH value to be reported; or,
respectively calculating the PH values of the uplink member carriers supported by the user equipment, and determining the calculated PH values as the PH values to be reported; or,
and calculating the total PH value of all the uplink member carriers supported by the carrier self, and determining the total PH value as the PH value to be reported.
The terminal further includes:
a first timer unit 63, configured to, if the PHR trigger unit determines the calculated PH value of the newly added uplink component carrier as a PH value that needs to be reported, cancel all PHR triggered on the newly added uplink component carrier after the terminal sends the determined PH value to the base station, and start a PHR prohibition timer and a periodic PHR timer that are set for the newly added uplink component carrier.
The terminal further includes:
a second timer unit 64, configured to, if the PHR trigger unit determines the calculated PH value of each uplink component carrier supported by the terminal or the total PH value of all uplink component carriers supported by the terminal as a PH value that needs to be reported, cancel the PHR triggered on all uplink component carriers supported by the terminal after the terminal sends the determined PH value to the base station, and start a PHR prohibition timer and a periodic PHR timer set for the terminal.
The PHR trigger unit 61 is configured to:
calculating the total PH value of all the uplink component carriers supported by the carrier self according to the following formula:
PH＝PCMAX-∑PCC(Total uplink Transmission Power for transmitting PHR subframe)
Wherein, PCMAXFor the maximum transmit power, SIG P, that the terminal is allowed to use over the system bandwidthCCAnd sending the total uplink transmission power of the subframe used by the PH value to the base station for the terminal.
The PH reporting unit 62 is configured to:
on the first uplink scheduling time-frequency resource, sending the determined PH value to a base station; the first uplink scheduling time-frequency resource is a time-frequency resource which is used for bearing a PHR MAC CE carrying the PH value and a corresponding MAC subheader on a newly added uplink member carrier after the terminal triggers PHR; or,
on the second uplink scheduling time frequency resource, sending the determined PH value to the base station; and the second uplink scheduling time-frequency resource is the time-frequency resource which is used for bearing the PHR MAC CE carrying the PH value and the corresponding MAC subheader on the first aggregated member carrier after the terminal triggers PHR.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
In conclusion, the beneficial effects of the invention include:
in the scheme provided by the embodiment of the invention, when the terminal receives the RRC reconfiguration signaling which is sent by the base station and adds the uplink component carrier to the terminal, the PHR is triggered, the PH value which needs to be reported is determined, and the determined PH value is reported to the base station.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A method for reporting Power Headroom (PHR) in a multi-carrier aggregation system is characterized by comprising the following steps:
a terminal receives a Radio Resource Control (RRC) reconfiguration signaling which is sent by a base station and carries information of uplink member carriers newly added for the terminal;
the terminal triggers PHR and determines the PH value of the power headroom to be reported;
the terminal reports the determined PH value to the base station;
the PH value to be reported determined by the terminal is as follows: increasing the configured PH value of the uplink member carrier; or, the PH value of each uplink component carrier supported by the terminal; or, the total PH values of all uplink component carriers supported by the terminal;
if the PH value determined by the terminal to be reported is the PH value of the uplink component carrier with increased configuration, after the terminal sends the determined PH value to the base station, the method further includes: the terminal cancels all PHR triggered on the newly added uplink member carrier, and starts a PHR forbidding timer and a periodic PHR timer which are set aiming at the newly added uplink member carrier;
if the PH value determined by the terminal to be reported is the PH value of each uplink component carrier supported by the terminal or the total PH value of all uplink component carriers supported by the terminal, after the terminal sends the determined PH value to the base station, the method further includes: the terminal cancels the PHR triggered on all the supported uplink member carriers, and restarts the PHR forbidding timer and the periodic PHR timer set for the terminal.
2. The method of claim 1, wherein the terminal calculates the total PH of all uplink component carriers supported by itself according to the following formula:
PH＝PCMAX–∑PCC
wherein, PCMAXFor the maximum transmit power, SIG P, that the terminal is allowed to use over the system bandwidthCCAnd sending the total uplink transmission power of the subframe used by the PH value to the base station for the terminal.
3. The method of claim 1 or 2, wherein the reporting, by the terminal, the determined PH value to the base station comprises:
the terminal sends the determined PH value to the base station on the first uplink scheduling time-frequency resource; the first uplink scheduling time-frequency resource is a time-frequency resource which is used for bearing a PHR MAC CE carrying the PH value and a corresponding MAC subheader on a newly added uplink member carrier after the terminal triggers PHR; or,
the terminal sends the determined PH value to the base station on a second uplink scheduling time-frequency resource; and the second uplink scheduling time-frequency resource is the time-frequency resource which is used for bearing the PHR MAC CE carrying the PH value and the corresponding MAC subheader on the first aggregated member carrier after the terminal triggers PHR.
4. A terminal, characterized in that the terminal comprises:
a receiving unit, configured to receive a radio resource control RRC reconfiguration signaling sent by a base station and carrying information of an uplink component carrier newly added to the terminal;
the PHR triggering unit is used for triggering PHR and determining the PH value of the power headroom to be reported;
a PH reporting unit, configured to report the PH value determined by the PHR triggering unit to a base station;
wherein the PHR triggering unit is used for: calculating the PH value of the newly added uplink member carrier, and determining the PH value as the PH value to be reported; or respectively calculating the PH values of the uplink member carriers supported by the terminal, and determining the calculated PH values as the PH values to be reported; or, calculating the total PH value of all uplink member carriers supported by the terminal, and determining the total PH value as the PH value to be reported;
the terminal further includes: a first timer unit, configured to cancel all PHR triggered on a newly added uplink component carrier after a terminal sends a determined PH value to a base station if the calculated PH value of the newly added uplink component carrier is determined by the PHR trigger unit as a PH value that needs to be reported, and start a PHR prohibition timer and a periodic PHR timer that are set for the newly added uplink component carrier;
the terminal further includes: and a second timer unit, configured to, if the PHR trigger unit determines the calculated PH value of each uplink component carrier supported by the terminal or the total PH value of all uplink component carriers supported by the terminal as a PH value that needs to be reported, cancel the PHR triggered on all uplink component carriers supported by the terminal after the terminal sends the determined PH value to the base station, and restart a PHR prohibition timer and a periodic PHR timer set for the terminal.
5. The terminal of claim 4, wherein the PHR triggering unit is configured to:
calculating the total PH value of all the uplink component carriers supported by the carrier self according to the following formula:
PH＝PCMAX–∑PCC
wherein, PCMAXFor the maximum transmit power, SIG P, that the terminal is allowed to use over the system bandwidthCCAnd sending the total uplink transmission power of the subframe used by the PH value to the base station for the terminal.
6. The terminal of claim 4 or 5, wherein the PH reporting unit is configured to:
on the first uplink scheduling time-frequency resource, sending the determined PH value to a base station; the first uplink scheduling time-frequency resource is a time-frequency resource which is used for bearing a PHR MAC CE carrying the PH value and a corresponding MAC subheader on a newly added uplink member carrier after the terminal triggers PHR; or,
on the second uplink scheduling time frequency resource, sending the determined PH value to the base station; and the second uplink scheduling time-frequency resource is the time-frequency resource which is used for bearing the PHR MAC CE carrying the PH value and the corresponding MAC subheader on the first aggregated member carrier after the terminal triggers PHR.
7. A multi-carrier aggregation communication system, comprising:
the base station is used for sending a Radio Resource Control (RRC) reconfiguration signaling carrying information of the newly added uplink member carrier to the terminal after determining that the uplink member carrier needs to be newly added to the terminal according to the current service volume of the terminal;
the terminal is used for receiving the RRC reconfiguration signaling, triggering PHR and determining a power headroom PH value needing to be reported; reporting the determined PH value to a base station;
wherein the terminal is configured to: calculating the PH value of the newly added uplink member carrier, and determining the PH value as the PH value to be reported; or respectively calculating the PH values of the uplink member carriers supported by the terminal, and determining the calculated PH values as the PH values to be reported; or, calculating the total PH value of all uplink member carriers supported by the terminal, and determining the total PH value as the PH value to be reported;
the terminal is further configured to: if the PHR triggering unit determines the calculated PH value of the newly added uplink member carrier as the PH value to be reported, after the terminal sends the determined PH value to the base station, all PHRs triggered on the newly added uplink member carrier are cancelled, and a PHR forbidding timer and a periodic PHR timer which are set aiming at the newly added uplink member carrier are started;
the terminal is further configured to: and if the PHR triggering unit determines the calculated PH value of each uplink member carrier supported by the terminal or the total PH value of all uplink member carriers supported by the terminal as the PH value required to be reported, the PHR triggered on all the uplink member carriers supported by the terminal is cancelled after the terminal sends the determined PH value to the base station, and a PHR forbidding timer and a periodic PHR timer which are set for the terminal are restarted.
8. The system of claim 7, wherein the terminal is to:
on the first uplink scheduling time-frequency resource, sending the determined PH value to a base station; the first uplink scheduling time-frequency resource is a time-frequency resource which is used for bearing a PHR MAC CE carrying the PH value and a corresponding MAC subheader on a newly added uplink member carrier after the terminal triggers PHR; or,
on the second uplink scheduling time frequency resource, sending the determined PH value to the base station; and the second uplink scheduling time-frequency resource is the time-frequency resource which is used for bearing the PHR MAC CE carrying the PH value and the corresponding MAC subheader on the first aggregated member carrier after the terminal triggers PHR.
9. The system of claim 7 or 8, wherein the RRC reconfiguration signaling is delta configuration signaling.
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| CN201010217415.6A CN102300321B (en) | 2010-06-23 | 2010-06-23 | Power headroom reporting (PHR) method, system and device in multicarrier polymerization system |
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| CN201010217415.6A CN102300321B (en) | 2010-06-23 | 2010-06-23 | Power headroom reporting (PHR) method, system and device in multicarrier polymerization system |
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| WO2013113156A1 (en) * | 2012-01-31 | 2013-08-08 | 富士通株式会社 | Method and device for triggering power headroom report |
| CN104796940B (en) * | 2014-01-20 | 2019-08-23 | 中兴通讯股份有限公司 | Power headroom reporting (PHR) report method and device |
| CN105592539B (en) * | 2014-10-22 | 2019-01-01 | 普天信息技术有限公司 | The acquisition methods and macro base station of power headroom |
| CN106162853B (en) * | 2015-03-24 | 2020-09-15 | 中兴通讯股份有限公司 | Power Headroom Report (PHR) processing method, device, terminal and base station |
| CN107046728B (en) | 2016-02-06 | 2020-09-22 | 中兴通讯股份有限公司 | Information reporting method and device and discontinuous transmission method |
| CN108306718B (en) * | 2016-08-31 | 2020-11-24 | 中国电信股份有限公司 | Carrier aggregation method, system and base station |
| CN109219127B (en) * | 2017-06-30 | 2020-08-21 | 维沃移动通信有限公司 | Power headroom reporting method, base station and terminal |
| CN109788541B (en) * | 2017-11-10 | 2021-11-30 | 维沃移动通信有限公司 | PHR reporting method and user equipment |
| CN111357371B (en) | 2017-11-17 | 2024-01-26 | 中兴通讯股份有限公司 | Method and apparatus for uplink transmission in a multi-carrier system |
| WO2019126953A1 (en) * | 2017-12-25 | 2019-07-04 | 北京小米移动软件有限公司 | Power headroom report transmission method and apparatus |
| CN118575529A (en) * | 2022-12-30 | 2024-08-30 | 北京小米移动软件有限公司 | Method, device, equipment and storage medium for reporting power information |
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| US8315182B2 (en) * | 2008-11-03 | 2012-11-20 | Htc Corporation | Method and related communication device for parameter reconfiguration in a wireless communications system |
| TWI487416B (en) * | 2008-12-03 | 2015-06-01 | Interdigital Patent Holdings | Uplink power headroom reporting for carrier aggregation |
| JP4812887B1 (en) * | 2010-04-30 | 2011-11-09 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile communication method and mobile station |
| CN102300307B (en) * | 2010-06-22 | 2015-06-17 | 华为技术有限公司 | Reporting method for reporting power margin and user equipment |
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