CN101895923B - Power headroom reporting (PHR) method and user equipment in carrier aggregation communication system - Google Patents
Power headroom reporting (PHR) method and user equipment in carrier aggregation communication system Download PDFInfo
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Abstract
The invention discloses a power headroom reporting (PHR) method in a carrier aggregation communication system. The method comprises the following steps that: an eNodeB (eNB) configures PHR triggering carrier groups and PHR carrier groups for user equipment (UE) respectively and configures one downlink path loss change threshold parameter for each PHR triggering carrier group respectively; the UE selects one measuring carrier from each PHR triggering carrier group; and if the measured path loss change of the carrier is more than or equal to the downlink path loss change threshold parameter configured by the eNB for the PHR triggering carrier group where the carrier is positioned, the PHR is triggered by all carriers in the PHR triggering carrier group where the carrier is positioned, and the UE selects one carrier from each PHR carrier group for the PHR. The invention also discloses the UE in the carrier aggregation communication system. Though the power headroom reporting method and the UE, the PHR can be accurately and efficiently performed, and the wireless resources of the system are saved.
Description
Technical field
The present invention relates to mobile communication technology, particularly relate to power headroom reporting (PHR) method and subscriber equipment (UE) in a kind of carrier aggregation communication system.
Background technology
In Long Term Evolution (LTE) system, base station (eNodeB, eNB) distributes the maximum transmission power that generally can not surpass UE to the ascending power resource of subscriber equipment (UE), and in order to ensure this point, UE need to be to the eNB reporting power margin.
In the LTE standard of existing third generation partner program (3GPP) Release 8, in the power headroom reporting (PHR) process, UE provides the different information between the through-put power estimated value of UE maximum transmission power and current Physical Uplink Shared Channel (PUSCH) to service eNB.Radio Resource is controlled (RRC) and by two timers of configuration and downlink path loss variation threshold parameter (dl-PathlossChange), the power headroom reporting (PHR) process is controlled.Wherein, with the threshold value of dl-PathlossChange as the triggering power headroom reporting (PHR).Two timers of above-mentioned configuration are respectively: Cyclical power headroom reporting timer (periodicPHR-Timer) and forbid power headroom reporting (PHR) timer (prohibitPHR-Timer).
In the LTE of 3GPP Release 8 standard, the event that should trigger power headroom reporting (PHR) (PHR) comprising: UE has the ascending resource of transmission new data, prohibitPHR-Timer is overtime or overtime, and after last time through-put power headroom reporting the changing value of path loss greater than dl-PathlossChange dB; PeriodicPHR-Timer is overtime; Receive from the non-of high level and forbid the configuration of this function or reshuffle power headroom reporting (PHR).Wherein, there is ascending resource to be used for transmitting under the prerequisite of new data at UE at this Transmission Time Interval (TTI), control if this is medium access the ascending resource distribution that (MAC) resets and transmit for the first time new data afterwards, start periodicPHR-Timer.There is ascending resource to be used for transmitting under the prerequisite of new data at UE at this TTI, if the judgement of power headroom reporting process is after transmitting PHR last time, at least triggered a PHR, perhaps this is the PHR that triggers for the first time, and if the ascending resource that distributes can hold the transmission of PHR and MAC head thereof in the priority of logical channels processing procedure, obtain the numerical value of power headroom from physical layer; Notify the multiplexed combinations process to generate and transmit the PHR MAC Control Element based on the numerical value that physical layer reports; Start or restart periodicPHR-Timer; Start or restart prohibitPHR-Timer; Cancel the PHR that all triggers.
Fig. 1 is the structural representation that is used for the MAC Control Element that PHR reports in the LTE standard.In the LTE standard of present 3GPP Release 8, structure as shown in Figure 1 to be used for MAC Control Element (MAC Control Element) that PHR reports.Referring to Fig. 1, the MAC Control Element total length that PHR reports is 1 byte, represents byte with Oct in Fig. 1; PH represents power headroom (Power Headroom, PH), takies 6 bits; R represents reservation bit, uses in Release 8 standards, and in Release 8 standards, the MAC Control Element that reports for PHR comprises 2 reservation bit R.
At present, in follow-up evolution (LTE-A) system of Long Term Evolution, in order to obtain higher peak data rate, 3GPP is discussing at Release 10 and is introducing LTE-A carrier aggregation technology, the i.e. Multicarrier Transmission Technologies of LTE.In the communication system that adopts this technology, UE supports one or more member carriers (CC) to carry out transfer of data, obtains larger bandwidth, and maximum bandwidth can reach 100MHz.Said method is called member carrier polymerization or bandwidth polymerization.In order to realize the asymmetrical member carrier polymerization of up-downgoing, for UE defines respectively specific up CC collection and descending CC collection.Up CC collection is two independently CC collection with different sizes from descending CC collection, configures by dedicated signaling.UE sends PUSCH on the CC that up CC concentrates, receive Physical Downlink Shared Channel (PDSCH) on the CC that descending CC concentrates.
In carrier aggregation communication system, when UE is operated in a plurality of carrier wave, allow eNB scheduling UE to carry out simultaneously uplink on all or part of carrier wave.In this case, for eNB reasonably dispatches, need UE to report its power headroom.After the LTE-A carrier aggregation technology was introduced, new problem was how to be operated in simultaneously in the situation of a plurality of carrier waves reporting power margin as UE.At present, for the power headroom reporting of carrier aggregation communication system, the report method of discussing in the 3GPP meeting comprises two kinds, and a kind of is that the PHR of carrier level reports, another kind be the UE level PHR report.Carrier level PHR reports and can accurately report the power headroom of each carrier wave to eNB, but in the situation that the carrier number of UE configuration is more, adopts carrier level PHR to report can to cause reporting too frequent, thereby has consumed too much Radio Resource.What UE level PHR reported reports number of times less, is conducive to save Radio Resource, but adopting UE level PHR to report is difficult to allow eNB know exactly the UPH of each carrier wave, therefore can affect the efficient of eNB scheduling.In a word, two kinds of power headroom reporting (PHR) methods of existing carrier aggregation communication system respectively have pluses and minuses, but all can't reach the power headroom reporting (PHR) result of precise and high efficiency.
Summary of the invention
The invention provides the power headroom reporting (PHR) method in a kind of carrier aggregation communication system, adopt the report power headroom that the method UE can precise and high efficiency.
The present invention also provides the UE in a kind of carrier aggregation communication system, adopts the report power headroom that this UE can precise and high efficiency.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention discloses the power headroom reporting (PHR) method in a kind of carrier aggregation communication system, the method comprises:
A, base station eNB to user equipment (UE) respectively allocating power headroom reporting PHR trigger carrier wave set and PHR reports carrier wave set, and configure respectively a downlink path loss variation threshold parameter for each PHR triggers carrier wave set;
B, UE trigger carrier wave set according to the PHR of configuration, select one to measure carrier wave in each PHR triggers carrier wave set, and the descending path loss of measuring carrier wave is measured;
Whether the path loss of the carrier wave that measures of C, UE judgement changes more than or equal to eNB and changes threshold parameter for the downlink path loss that the PHR at this carrier wave place triggers the carrier wave set configuration, if so, and execution in step D, otherwise, return to step B;
D, UE should measure carrier wave as triggering carrier wave, all carrier waves in the PHR triggering carrier wave set that triggers the carrier wave place are triggered PHR report;
E, UE report carrier wave set according to the PHR of configuration, report in carrier wave set at each PHR and select one and report carrier wave, report the PHR of carrier wave to report eNB this.
The dividing mode that the described PHR of steps A triggers carrier wave set comprises:
All colocation sites are divided into a PHR with the carrier wave of frequency range trigger carrier wave set;
The described PHR of steps A reports the dividing mode of carrier wave set to comprise:
All carrier waves of combined dispatching are divided into a PHR report carrier wave set;
And/or,
Inter-related all carrier waves of PHR are divided into a PHR report carrier wave set.
The described eNB of steps A configures respectively to UE that PHR triggers carrier wave set and PHR reports carrier wave set to comprise:
ENB controls the RRC signaling procedure by dedicated radio resources and configures respectively to UE that PHR triggers carrier wave set and PHR reports carrier wave set.
Steps A further comprises:
ENB triggers the specified measurement carrier wave of carrier wave set to UE configuration PHR;
The described UE of step B selects a measurement carrier wave to comprise in each PHR triggers carrier wave set:
UE selects the specified measurement carrier wave of eNB configuration as measuring carrier wave.
Described the reporting in carrier wave set at each PHR of step e selected one and reported carrier wave to comprise:
UE is set reports carrier wave priority, UE selects carrier wave as reporting carrier wave according to the order of this priority successively, if there is no available ascending resource in the carrier wave of a upper priority, selects to report carrier wave to report in the carrier wave of next priority;
The described carrier wave priority that reports comprises: PHR triggers carrier wave and other carrier wave;
The described carrier wave priority that reports is configured UE by eNB, or the described carrier wave priority that reports is stipulated by communication standard.
The described structure with this PHR media access control MAC unit that reports that the PHR of carrier wave reports that eNB adopts of step e comprises:
PHR reports carrier wave set identify label CGID, takies 2 bits;
Power headroom PH takies 6 bits.
The invention also discloses the user equipment (UE) in a kind of carrier aggregation communication system, this UE comprises: dispensing unit, measuring unit, trigger element and report the unit;
Described dispensing unit, the power headroom reporting (PHR) PHR triggering carrier wave set and the PHR that are used for the configuration of preservation base station eNB report carrier wave set, and preserve base station eNB and trigger for each PHR the downlink path loss variation threshold parameter that carrier wave set configures respectively;
Described measuring unit, the PHR that is used for preserving according to dispensing unit triggers carrier wave set, selects one to measure carrier wave in each PHR triggers carrier wave set, and the descending path loss of measuring carrier wave is measured, and measurement result is sent to trigger element;
Described trigger element, the downlink path loss that is used for preserving according to dispensing unit changes threshold parameter and from the measurement result of measuring unit, whether the path loss of the carrier wave that measures of judgement changes more than or equal to eNB and changes threshold parameter for the downlink path loss that the PHR at this carrier wave place triggers the carrier wave set configuration, if, should measure carrier wave as triggering carrier wave, all carrier waves in the PHR triggering carrier wave set that triggers the carrier wave place are triggered PHR report, and with the carrier wave notice reporting unit that triggers;
The described unit that reports is used for reporting carrier wave set and from the triggering carrier wave notice of trigger element according to the PHR that dispensing unit is preserved, and reports at each PHR and selects one in carrier wave set and report carrier wave, reports the PHR of carrier wave to report eNB this.
Described dispensing unit is used for all colocation sites of preservation with the PHR triggering carrier wave set of the carrier wave composition of frequency range, and reports carrier wave set for the PHR of all carrier waves of preserving combined dispatching and/or inter-related all carrier waves compositions of PHR.
Described dispensing unit, the PHR that is further used for preserving the eNB configuration triggers the specified measurement carrier wave of carrier wave set;
Described measuring unit, the specified measurement carrier wave that the eNB that is further used for that dispensing unit is preserved configures is as measuring carrier wave.
Described dispensing unit, be further used for preservation and report carrier wave priority, the described carrier wave priority that reports comprises: PHR triggers carrier wave and other carrier wave, and the described carrier wave priority that reports is configured UE by eNB, or the described carrier wave priority that reports is stipulated by communication standard;
The described unit that reports, be further used for reporting carrier wave priority according to what dispensing unit was preserved, select successively carrier wave as reporting carrier wave according to the order of this priority, if there is no available ascending resource in the carrier wave of a upper priority, select to report carrier wave in the carrier wave of next priority.
The described unit that reports is used for reporting the PHR of carrier wave to report eNB by PHR media access control MAC unit, and the structure of described PHR MAC unit comprises:
PHR reports carrier wave set identify label CGID, takies 2 bits;
Power headroom PH takies 6 bits.
By above summary of the invention as seen, the carrier wave that the path loss of UE in carrier aggregation communication system is consistent is divided into same PHR and triggers carrier wave set, the carrier wave of the combined dispatching of UE or the PHR carrier wave that is mutually related is divided into PHR and reports carrier wave set, and therefore, the method can realize exactly that PHR reports.Selecting a carrier wave to measure and determine whether to trigger PHR in each PHR triggers carrier wave set reports, if determining to trigger PHR reports, the PHR at this carrier wave place being triggered all carrier waves in carrier wave set triggers PHR and reports, reporting at each PHR after triggering selects a carrier wave to report in carrier wave set, therefore reduce the number of times that PHR triggers and reports, saved Radio Resource.
Description of drawings
Fig. 1 is the structural representation that is used for the MAC Control Element that PHR reports in the LTE standard;
Fig. 2 is the basic scene schematic diagram of the carrier aggregation in LTE-A;
Fig. 3 is the flow chart of the power headroom reporting (PHR) method in carrier aggregation communication system in the embodiment of the present invention;
Fig. 4 is the structural representation that is used for the MAC Control Element that PHR reports in the embodiment of the present invention in carrier aggregation communication system;
Fig. 5 is the UE structural representation in carrier aggregation communication system in the embodiment of the present invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
Basic thought of the present invention is, in carrier aggregation communication system, carrier wave division PHR triggering carrier wave set and PHR to UE report carrier wave set, in triggering carrier wave set, each PHR select a carrier wave to measure, if changing, its path loss reaches the threshold value that the downlink path loss changes threshold parameter, the PHR at this carrier wave place is triggered all carrier waves in carrier wave set and trigger PHR and report, give the correct time on PHR, report at each PHR and select a carrier wave to report in carrier wave set.
At present, stipulated the carrier aggregation scene in the LTE-A system during 3GPP discusses, the power headroom reporting method in the embodiment of the present invention is completed under carrier aggregation scene in existing LTE-A system.Fig. 2 is the basic scene schematic diagram of the carrier aggregation in LTE-A.As shown in Figure 2, three kinds of basic scenes of carrier aggregation in LTE-A have been shown in Fig. 2.Wherein, with band region representation carrier wave 1, be designated as F1, with vertical line region representation carrier wave 2, be designated as F2.The basic scene 1 of carrier aggregation in Fig. 2 (a) expression LTE-A is the situation of colocation site with covering; The basic scene 2 of carrier aggregation in Fig. 2 (b) expression LTE-A is the different situations about covering of colocation site; The basic scene 3 of carrier aggregation in Fig. 2 (c) expression LTE-A, for comprising the situation of repeater, i.e. the situation of colocation site not.
For above-mentioned basic scene 1 and 2, and the colocation site part in basic scene 3, when UE is operated in these zones and has configured a plurality of carrier wave, can think that generally the path loss of base station down signal arrival UE experience is identical.Therefore, in this case, the thresholding dl-PathlossChange that the path loss that on different carrier waves, triggering PHR reports changes should be also identical, and different carrier waves generally can trigger simultaneously.If the carrier wave of these colocation sites is divided into one group, UE only need to measure any one carrier wave in this group so, just can obtain the path loss of other carrier wave in this group, and the descending path loss of the carrier wave of measuring as UE changes and just triggers a PHR when surpassing thresholding and report.PHR reports and triggers take carrier wave set as unit, can effectively reduce UE to the measurement number of times of descending path loss and the number of times of PHR triggering, thereby reduce the UE power consumption.For the basic scene 1 of carrier aggregation shown in Fig. 2 (a), the mode that triggers take group as unit is identical with the triggering of UE level, can merge the mode of the descending path loss change triggers of UE level.
In carrier aggregation communication system, sometimes eNB selects the part member carrier of UE is carried out the constant power combined dispatching, eNB distributes identical power resource to a plurality of different carriers of combined dispatching at every turn, therefore, all carrier waves of combined dispatching can be formed a PHR and report carrier wave set.And in carrier aggregation communication system, eNB can derive the PHR of another one or several carrier waves from the PHR of a carrier wave sometimes, therefore, inter-related all carrier waves of PHR can be formed a PHR and report carrier wave set.In above two kinds of situations, UE can report the PHR that only reports a carrier wave in carrier wave set at each, and needn't report the PHR of all carrier waves in this carrier wave set, thereby reduces the number of times that PHR reports.
The method that below by a specific embodiment, above-mentioned power headroom take carrier wave set as unit is triggered and report describes in detail.Fig. 3 is the flow chart of the power headroom reporting (PHR) method in carrier aggregation communication system in the embodiment of the present invention.Referring to Fig. 3, the method comprises the steps:
Wherein, eNB completes by the special RRC signaling procedure PHR of UE is triggered the configuration that carrier wave set and PHR report carrier wave set.
PHR triggers carrier wave set and is used for the triggering that UE side PHR reports, and its dividing mode is, all colocation sites is divided into a PHR with the carrier wave of frequency range triggers carrier wave set.
PHR reports carrier wave set to trigger the inner Further Division of carrier wave set at a PHR and obtains, and is configured according to scheduling strategy by eNB.PHR reports carrier wave set that two kinds of dividing mode can be arranged, and first kind of way forms a PHR by all carrier waves of combined dispatching and reports carrier wave set, and the second way forms a PHR by inter-related all carrier waves of PHR and reports carrier wave set.Above-mentioned two kinds of dividing mode can individualism, also can exist simultaneously, for example, trigger carrier wave set for some PHR, all carrier waves of combined dispatching in this triggering carrier wave set can be divided into a PHR and report carrier wave set, simultaneously, inter-related all carrier waves of the PHR in this triggering carrier wave set are divided into the 2nd PHR and report carrier wave set.
Further, in step 301, eNB can also trigger the specified measurement carrier wave of carrier wave set simultaneously to UE configuration PHR when triggering carrier wave set to UE configuration PHR, that is, specify PHR to trigger some carrier waves in carrier wave set as measuring carrier wave by eNB to UE.
In this step, UE only need to carry out the path loss variation monitoring to one of them carrier wave and get final product in each triggers carrier wave set.
Further, if in step 301, eNB has configured the specified measurement carrier wave of PHR triggering carrier wave set to UE, and in step 302, UE selects the specified measurement carrier wave of eNB configuration to trigger the measurement carrier wave of carrier wave set as the PHR of correspondence.
In this step, report all carrier waves in carrier wave set for same PHR, UE only need report a PHR to get final product.
In step 305, when UE has triggered after PHR reports at a carrier wave, whether a problem that needs to consider allows UE to report the PHR of triggering by other carrier wave.In LTE R8 of the prior art system, owing to there not being the multicarrier characteristic, so there is not this problem.In embodiments of the present invention, allow UE to report PHR by other carrier wave, namely introduce PHR and report across carrier wave.And the embodiment of the present invention is that the UE carrier wave that adopts that carries out giving the correct time on PHR has defined priority, UE is set reports carrier wave priority, reports carrier wave priority to comprise that PHR triggers carrier wave and other carrier wave, that is, allow to report across carrier wave.Report carrier wave priority to be configured UE by eNB and obtain, also can stipulate in communication standard, in actual applications, UE obtains reporting carrier wave priority according to communication standard.Give the correct time on PHR carrying out, UE selects PHR to report the carrier wave of employing according to the order of this priority successively, in the situation that there is no available ascending resource in the carrier wave of previous priority, considers to use the carrier wave of next priority to report.Prioritization can arrange according to the needs of network configuration, has multiple embodiment, in embodiments of the present invention, only take a kind of execution mode wherein as example, the sequence of priority is described.In embodiments of the present invention, prioritization is specific as follows: the first priority, trigger the carrier wave that PHR reports, and namely trigger carrier wave; The second priority and triggers carrier wave and reports carrier wave in carrier wave set at same PHR; The 3rd priority is with the carrier wave of triggering carrier wave in same PHR triggers carrier wave set; The 4th priority, other any carrier wave.For example, at first should consider that carrying out PHR on the carrier wave that triggers PHR reports, if but this carrier wave does not have the ascending resource mandate on certain nearest subframe, and other several carrier waves have the ascending resource mandate, UE is in the carrier wave that the ascending resource mandate is arranged so, and preferential the selection reports the carrier wave of carrier wave set to report PHR with PHR.
Power headroom reporting (PHR) method in the carrier aggregation communication system of the employing embodiment of the present invention, the MAC Control Element structure that reports for PHR in existing LTE standard shown in Figure 1 can't be distinguished carrier wave set, therefore, also need the structure that is used for the MAC Control Element that PHR reports is improved.Fig. 4 is the structural representation that is used for the MAC Control Element that PHR reports in the embodiment of the present invention in carrier aggregation communication system.Referring to Fig. 1 and Fig. 4, improve forming on the structure of structure MAC Control Element in existing LTE standard shown in Figure 1 shown in Figure 4.The MAC Control Element total length that PHR shown in Figure 4 reports is still 1 byte, represents byte with Oct in Fig. 4.As shown in Figure 1 in the structure of MAC Control Element, also have 2 reservation bit R except power headroom value PH, therefore, in the embodiment of the present invention shown in Figure 4, MAC Control Element in carrier aggregation communication system represents that with these 2 reservation bits PHR reports the identify label (ID) of carrier wave set.Referring to Fig. 4, in the structure of the MAC Control Element in the embodiment of the present invention in carrier aggregation communication system, PH represents power headroom, takies 6 bits; CGID represents that PHR reports carrier wave set identify label (CarrierGroup ID, CGID), takies 2 bits.The structure of this MAC Control Element can be called power headroom reporting medium access control unit type 2 (PHR MAC CE Type 2).2 bits can represent at most 4 group ID.In present 3GPP LTE-A Release 10 carrier aggregation system planning, maximum carrier number is 5, and namely UE can configure at most 5 carrier waves, and 2 reservation bits can't represent 5 carrier waves.Propose in the embodiment of the present invention these 5 carrier waves are divided into carrier wave set, the number of carrier wave set is less than or equal to 4.By the introducing of carrier wave set concept, carrier aggregation system can allow to report across carrier wave PHR.Therefore, adopt the structure of the PHR MAC CE Type 2 of embodiment of the present invention proposition, can solve well the problem that PHR reports across carrier wave, UE needn't by the time trigger the ascending resource mandate arrival of the carrier wave of PHR and just can adopt other carrier wave to report PHR, thereby further shortened the stand-by period that PHR reports, improved link efficiency and resource utilization ratio.
Above power headroom reporting method in the carrier aggregation communication system of the embodiment of the present invention is illustrated, below by an embodiment, the UE that adopts the method is described.
Fig. 5 is the UE structural representation in carrier aggregation communication system in the embodiment of the present invention.Referring to Fig. 5, the UE of the embodiment of the present invention comprises: dispensing unit 501, measuring unit 502, trigger element 503 and report unit 504.
Power headroom reporting (PHR) PHR triggering carrier wave set and PHR that dispensing unit 501 is preserved the base station eNB configuration report carrier wave set, and base station eNB triggers for each PHR the downlink path loss variation threshold parameter that carrier wave set configures respectively.
Wherein, dispensing unit 501 is preserved all colocation sites with the PHR triggering carrier wave set of the carrier wave composition of frequency range; And preserve all carrier waves of combined dispatching and/or the PHR of inter-related all carrier waves compositions of PHR and report carrier wave set.
Further, dispensing unit 501 is also preserved the specified measurement carrier wave of the PHR triggering carrier wave set of eNB configuration.
Further, dispensing unit 501 is preserved and is reported carrier wave priority.This reports carrier wave priority to comprise: PHR triggers carrier wave and other carrier wave.Report carrier wave priority to be configured UE by eNB and obtain, also can stipulate to obtain in communication standard.In a specific embodiment of the present invention, this reports carrier wave priority to comprise: the first priority, trigger carrier wave; The second priority and triggers carrier wave and reports carrier wave in carrier wave set at same PHR; The 3rd priority is with the carrier wave of triggering carrier wave in same PHR triggers carrier wave set; The 4th priority, other any carrier wave.
Measuring unit 502 triggers carrier wave set according to the PHR that preserves in dispensing unit 501, selects one to measure carrier wave in each PHR triggers carrier wave set, the path loss of measuring carrier wave is changed measure, and measurement result is sent to trigger element 503.
Further, if dispensing unit 501 has been preserved the specified measurement carrier wave that the PHR of eNB configuration triggers carrier wave set, the specified measurement carrier wave of measuring unit 502 eNB configuration that dispensing unit 501 is preserved is as measuring carrier wave.
The PHR that reports unit 504 to preserve according to dispensing unit 501 reports carrier wave set and from the triggering carrier wave notice of trigger element 503, reports at each PHR and selects one in carrier wave set and report carrier wave, reports the PHR of carrier wave to report eNB this.
Wherein, report unit 504 will report the PHR of carrier wave to report eNB by PHR MAC unit, the structure of the PHR MAC unit that adopts comprises: PHR reports carrier wave set identify label CGID, takies 2 bits; Power headroom PH takies 6 bits.
Further, report unit 504 to report carrier wave priority according to what dispensing unit was preserved, select successively carrier wave as reporting carrier wave according to the order of this priority, in the situation that there is no available ascending resource in the carrier wave of a upper priority, select to report carrier wave in the carrier wave of next priority.
By above embodiment as seen, PHR triggers carrier wave set and PHR reports carrier wave set by the carrier wave of the UE in carrier aggregation communication system is divided, selecting a carrier wave to measure and determine whether to trigger PHR in each PHR triggers carrier wave set reports, if determining to trigger PHR reports, the PHR at this carrier wave place is triggered all carrier waves in carrier wave set and trigger PHR and report, report at each PHR after triggering and select a carrier wave to report in carrier wave set.Because it is consistent that same PHR triggers the path loss of the carrier wave in carrier wave set, it is combined dispatching that same PHR reports the carrier wave in carrier wave set, perhaps same PHR reports the PHR of the carrier wave in carrier wave set to derive mutually to draw, and therefore, the method can realize exactly that PHR reports; And, because carrier wave has been carried out the division of carrier wave set, only a carrier wave is detected and reports in each group, therefore reduced the PHR triggering times and reported number of times, thereby having saved Radio Resource.PHR trigger the introducing of carrier wave set can decrease UE to the measurement number of times of descending path loss, thereby reduce the UE power loss, be conducive to energy-saving and emission-reduction.The PHR that PHR reports the introducing of carrier wave set can reduce repetition reports number of times, thereby improves resource utilization, and eliminates the obstacle that PHR reports across carrier wave.And PHR makes when there is no available ascending resource on the carrier wave that PHR triggers across the introducing of carrier dispatching, and UE can report by other carrier wave, has further effectively reduced the stand-by period that PHR reports, and has improved link efficiency and resource utilization ratio.
The above is only preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (7)
1. the power headroom reporting (PHR) method in a carrier aggregation communication system, is characterized in that, the method comprises:
A, base station eNB to user equipment (UE) respectively allocating power headroom reporting PHR trigger carrier wave set and PHR reports carrier wave set, and configure respectively a downlink path loss variation threshold parameter for each PHR triggers carrier wave set;
B, UE trigger carrier wave set according to the PHR of configuration, select one to measure carrier wave in each PHR triggers carrier wave set, and the descending path loss of measuring carrier wave is measured;
Whether the path loss of the carrier wave that measures of C, UE judgement changes more than or equal to eNB and changes threshold parameter for the downlink path loss that the PHR at this carrier wave place triggers the carrier wave set configuration, if so, and execution in step D, otherwise, return to step B;
D, UE should measure carrier wave as triggering carrier wave, all carrier waves in the PHR triggering carrier wave set that triggers the carrier wave place are triggered PHR report;
E, UE report carrier wave set according to the PHR of configuration, report in carrier wave set at each PHR and select one and report carrier wave, report the PHR of carrier wave to report eNB this;
Wherein,
The dividing mode that the described PHR of steps A triggers carrier wave set comprises:
All colocation sites are divided into a PHR with the carrier wave of frequency range trigger carrier wave set;
The described PHR of steps A reports the dividing mode of carrier wave set to comprise:
All carrier waves of combined dispatching are divided into a PHR report carrier wave set;
And/or,
Inter-related all carrier waves of PHR are divided into a PHR report carrier wave set;
Described the reporting in carrier wave set at each PHR of step e selected one and reported carrier wave to comprise:
UE is set reports carrier wave priority, UE selects carrier wave as reporting carrier wave according to the order of this priority successively, if there is no available ascending resource in the carrier wave of a upper priority, selects to report carrier wave to report in the carrier wave of next priority;
The described carrier wave priority that reports comprises: PHR triggers carrier wave and other carrier wave;
The described carrier wave priority that reports is configured UE by eNB, or the described carrier wave priority that reports is stipulated by communication standard.
2. power headroom reporting (PHR) method according to claim 1, is characterized in that, the described eNB of steps A configures respectively to UE that PHR triggers carrier wave set and PHR reports carrier wave set to comprise:
ENB controls the RRC signaling procedure by dedicated radio resources and configures respectively to UE that PHR triggers carrier wave set and PHR reports carrier wave set.
3. power headroom reporting (PHR) method according to claim 1, is characterized in that,
Steps A further comprises:
ENB triggers the specified measurement carrier wave of carrier wave set to UE configuration PHR;
The described UE of step B selects a measurement carrier wave to comprise in each PHR triggers carrier wave set:
UE selects the specified measurement carrier wave of eNB configuration as measuring carrier wave.
4. power headroom reporting (PHR) method according to claim 1, is characterized in that, the described structure with this PHR media access control MAC unit that reports that the PHR of carrier wave reports that eNB adopts of step e comprises:
PHR reports carrier wave set identify label CGID, takies 2 bits;
Power headroom PH takies 6 bits.
5. the user equipment (UE) in a carrier aggregation communication system, is characterized in that, this UE comprises: dispensing unit, measuring unit, trigger element and report the unit;
Described dispensing unit, the power headroom reporting (PHR) PHR triggering carrier wave set and the PHR that are used for the configuration of preservation base station eNB report carrier wave set, and preserve base station eNB and trigger for each PHR the downlink path loss variation threshold parameter that carrier wave set configures respectively;
Described measuring unit, the PHR that is used for preserving according to dispensing unit triggers carrier wave set, selects one to measure carrier wave in each PHR triggers carrier wave set, and the descending path loss of measuring carrier wave is measured, and measurement result is sent to trigger element;
Described trigger element, the downlink path loss that is used for preserving according to dispensing unit changes threshold parameter and from the measurement result of measuring unit, whether the path loss of the carrier wave that measures of judgement changes more than or equal to eNB and changes threshold parameter for the downlink path loss that the PHR at this carrier wave place triggers the carrier wave set configuration, if, should measure carrier wave as triggering carrier wave, all carrier waves in the PHR triggering carrier wave set that triggers the carrier wave place are triggered PHR report, and with the carrier wave notice reporting unit that triggers;
The described unit that reports is used for reporting carrier wave set and from the triggering carrier wave notice of trigger element according to the PHR that dispensing unit is preserved, and reports at each PHR and selects one in carrier wave set and report carrier wave, reports the PHR of carrier wave to report eNB this;
Wherein,
Described dispensing unit is used for all colocation sites of preservation with the PHR triggering carrier wave set of the carrier wave composition of frequency range, and reports carrier wave set for the PHR of all carrier waves of preserving combined dispatching and/or inter-related all carrier waves compositions of PHR;
Described dispensing unit, be further used for preservation and report carrier wave priority, the described carrier wave priority that reports comprises: PHR triggers carrier wave and other carrier wave, and the described carrier wave priority that reports is configured UE by eNB, or the described carrier wave priority that reports is stipulated by communication standard;
The described unit that reports, be further used for reporting carrier wave priority according to what dispensing unit was preserved, select successively carrier wave as reporting carrier wave according to the order of this priority, if there is no available ascending resource in the carrier wave of a upper priority, select to report carrier wave in the carrier wave of next priority.
6. UE according to claim 5, is characterized in that,
Described dispensing unit, the PHR that is further used for preserving the eNB configuration triggers the specified measurement carrier wave of carrier wave set;
Described measuring unit, the specified measurement carrier wave that the eNB that is further used for that dispensing unit is preserved configures is as measuring carrier wave.
7. UE according to claim 5, is characterized in that,
The described unit that reports is used for reporting the PHR of carrier wave to report eNB by PHR media access control MAC unit, and the structure of described PHR MAC unit comprises:
PHR reports carrier wave set identify label CGID, takies 2 bits;
Power headroom PH takies 6 bits.
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| CN 201010198194 CN101895923B (en) | 2010-06-11 | 2010-06-11 | Power headroom reporting (PHR) method and user equipment in carrier aggregation communication system |
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