CN105451262A - Method for supporting transmission of power headroom report in dual connectivity communication environment - Google Patents
Method for supporting transmission of power headroom report in dual connectivity communication environment Download PDFInfo
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- CN105451262A CN105451262A CN201410386314.XA CN201410386314A CN105451262A CN 105451262 A CN105451262 A CN 105451262A CN 201410386314 A CN201410386314 A CN 201410386314A CN 105451262 A CN105451262 A CN 105451262A
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention relates to a method for notifying power state of user equipment to eNB in a dual connectivity communication environment, and a method for supporting transmission of a power headroom report in the dual connectivity communication environment. According to one embodiment of the method, the method includes: determining that the user equipment is in a power limited situation when the user equipment is consecutively in a power lack situation in a first preset period; and notifying that the user equipment is in the power limited situation to an MeNB and an SeNB.
Description
Technical field
The present invention relates to a kind of under dual link communication environment the method for the power rating of informing base station subscriber equipment, a kind of and method for supporting power headroom reporting (PHR) to transmit under dual link communication environment.
Background technology
According to the research state of current dual link (DualConnectivity, DC), the power headroom reporting (PHR) (PHR, PowerHeadroomReport) about dual link has reached following agreement:
It will be that two MAC entity all activate PHR that-path loss variation, P-MPR change and auxiliary community are activated;
-periodically configure the PHR of the corresponding MAC entity of activation and reconfigure;
-when MAC entity sends PHR, startup PHR is forbidden timer.
First agreement relates to the event triggering the PHR for DC scene and report.Three events that 3GPP adopts relate to path loss variation, P-MPR change and auxiliary community (Scell) activation.Second agreement relates to periodic PHR reporting scheme.In this respect, configure more short-period timer to arrange subscriber equipment (UE) and report that PHR is unpractiaca continually, because this will cause extra expense.
For DC scene, due to the independently scheduling process on two base stations, compared with the carrier aggregation scene of R10/R11, the Potential feasibility of UE Power Limitation is very large.For this UE Power Limitation situation, the dispatching command on dominant base (MeNB) and prothetic group station (SeNB) can not fully perform due to limited transmitted power.Therefore, if dominant base and prothetic group station do not know this situation and continue radical scheduling to determine, then by influential system performance.Thus, need to allow dominant base and/or prothetic group station know UE devices in power limited situations as quickly as possible, to ensure the scheduling operation of greater efficiency.
PHR is a kind of good scheme allowing base station know UE power rating.But according to above-mentioned agreement, when there is devices in power limited situations, do not report PHR to limit to the operation of base station to UE.Therefore, need to define new UE operation and solve the problems referred to above.
In addition, for DC situation, when triggering PHR, different base stations may have different frame structures (TDD and FDD) and/or different uplink/downlink sub-frame configuration.Therefore, when PHR is reported to a base station, the community of another base station may be descending sub frame or special subframe by chance.Therefore, in this case, how for the PHR report in the community in another base station of DC situation process is also the problem needing to solve.
Summary of the invention
As mentioned above, the PHR under DC scene is still needed to solve following two problems:
1., for DC scene, whether and how UE devices in power limited situations is sent to base station.
2. when PHR triggers, how to process following situation, namely two base stations have different uplink/downlink subframes.
In order to solve the problem, according to a first aspect of the invention, propose a kind of under dual link communication environment in a user device for the method for the power rating of informing base station subscriber equipment, wherein, described base station comprises dominant base and prothetic group station, described subscriber equipment and described dominant base and described prothetic group station form dual link, described method comprises: B., when described subscriber equipment is in power shortage situation continuously during the first predetermined amount of time, determines that described subscriber equipment is in devices in power limited situations; And C. is when described subscriber equipment is confirmed as being in described devices in power limited situations, notify that described in described dominant base and described prothetic group station, subscriber equipment is in described devices in power limited situations.
Preferably, to notify in step C described in described dominant base and described prothetic group station that subscriber equipment is in described devices in power limited situations to comprise further: C1. sends the control element of the first MAC layer to described dominant base and described prothetic group station, and it indicates described subscriber equipment to be in described devices in power limited situations.The control element of described first MAC layer only comprises attached bag head, and the Logic Channel Identifier in described attached bag head is set to indicate described subscriber equipment to be in described devices in power limited situations.
This execution mode is comparatively simple, only needs less L2 layer signaling, therefore all only needs 1 byte to indicate to each base station.Further, only newly defining a new Logic Channel Identifier (LogicalChannelID, LCID) at this indicates the UE under DC situation to be in devices in power limited situations.
Preferably, to notify in step C described in described dominant base and described prothetic group station that subscriber equipment is in described devices in power limited situations to comprise further: C2. sends first power She to described dominant base and described prothetic group station and measures report.This first power She measures the power headroom value that report comprises each relevant community.
Above-mentioned execution mode defines the event of a new triggering PHR, and namely subscriber equipment is in devices in power limited situations.In this embodiment by transmitting detailed PHR value, therefore the scheduling operation at dominant base and prothetic group station will be conducive to.
Preferably, before described step B, also comprise steps A: receive RRC information from described dominant base, described RRC information comprises described first predetermined amount of time.At this, can to give advance notice relevant the first predetermined amount of time of subscriber equipment simply by RRC information.
Preferably, this RRC information also comprises the second predetermined amount of time and the 3rd predetermined amount of time, described method also comprises the steps: that D. works as described subscriber equipment when being in power normal conditions continuously during described second predetermined amount of time, determines that described subscriber equipment is in normal operating situation; And E. when not having a trigger power headroom reporting after described subscriber equipment is confirmed as being in described normal operating situation and during described 3rd predetermined amount of time, notify that described in described dominant base and described prothetic group station, subscriber equipment is in described normal operating situation.
In this embodiment, when after such as subscriber equipment enabling situation, two base station user equipment enabling situations will be notified under certain condition.Thus avoid following situation: two base stations still think that subscriber equipment is in devices in power limited situations and proceeds the scheduling of guarding, thus do not utilize the transmitted power of subscriber equipment completely.
Further, this certain condition such as only not having to notify when trigger power headroom reporting after subscriber equipment is confirmed as being in normal operating situation during described 3rd predetermined amount of time.This also avoids and still send notice when to have triggered new power headroom reporting (PHR) during the 3rd predetermined amount of time and inform that two base station user equipment are in the step of this redundancy of normal operating situation.
At this, do not have trigger power headroom reporting such as can refer to there is no event and/or there is no periodically trigger power headroom reporting.
Preferably, to notify in step e described in described dominant base and described prothetic group station that subscriber equipment is in described normal operating situation to comprise further: E1. sends the control element of the second MAC layer to described dominant base and described prothetic group station, and it indicates described subscriber equipment to be in described normal operating situation.The control element of this second MAC layer only comprises attached bag head, and the reservation bit in described attached bag head is set to indicate described subscriber equipment to be in described devices in power limited situations.
This execution mode is comparatively simple, only needs less L2 layer signaling, therefore all only needs 1 byte to indicate to each base station.Further, only newly define reservation bit at this and be in devices in power limited situations or normal operating situation to indicate the UE under DC situation.
Preferably, to notify in step e described in described dominant base and described prothetic group station that subscriber equipment is in described normal operating situation to comprise further: E2. sends the second power headroom reporting (PHR) to described dominant base and described prothetic group station.
Above-mentioned execution mode defines the event of a new triggering PHR, and namely subscriber equipment is from not having trigger power headroom reporting after devices in power limited situations is back to normal operating situation during the 3rd predetermined amount of time.
Similarly, in this embodiment by transmitting detailed PHR value, therefore the further scheduling operation of dominant base and prothetic group station will be conducive to.
According to a second aspect of the invention, propose a kind of under dual link communication environment in a base station for receiving the method for the power rating of subscriber equipment, wherein, described base station comprises dominant base and prothetic group station, described subscriber equipment and described dominant base and described prothetic group station form dual link, described method comprises: b. is from described subscriber equipment reception notification, and it indicates described subscriber equipment to be in described devices in power limited situations; And c. dispatches described subscriber equipment based on described notice.
According to a third aspect of the invention we, propose a kind of method in a user device for supporting power headroom reporting (PHR) to transmit under dual link communication environment, wherein, described subscriber equipment and dominant base and prothetic group station form dual link, described dominant base administers a main plot and one or more auxiliary community, a special auxiliary community and one or more auxiliary community are administered in described prothetic group station, activation cell for described user device configuration comprises described main plot, the one or more auxiliary community of described special auxiliary community and activation, described subscriber equipment sends described power headroom reporting (PHR) to described dominant base and described prothetic group station by the control element of MAC layer, when triggering described power headroom reporting (PHR), at least one in described activation cell is in descending sub frame, described method comprises:
In the control element of described MAC layer, only comprise the power headroom value of the activation cell being in sub-frame of uplink, and in this MAC layer control element, indicate whether the power She value comprising described main plot and described special auxiliary community.
Such as, reservation bit in bit map in the control element of described MAC layer can be set to indicate the control element of described MAC layer whether to comprise the power headroom value of described main plot, and the bit relevant to described special auxiliary community in bit map in the control element of described MAC layer can be set to indicate the control element of described MAC layer whether to comprise the power headroom value of described special auxiliary community.
Alternatively, the control element that described method comprises described MAC layer comprises the power headroom value of the activation cell being in sub-frame of uplink, and for being in the activation cell of described descending sub frame, according to the transformat rated output margin value of virtual transmission form or the nearest sub-frame of uplink according to described activation cell, and be included in the control element of described MAC layer.
Alternatively, if described method comprises described main plot and/or described special auxiliary community be in described descending sub frame, then postpone the transmission of the control element of described MAC layer until described main plot and described special auxiliary community are all in sub-frame of uplink, if the one or more auxiliary community of described activation is in described descending sub frame, then do not comprise its power headroom value at the control element of described MAC layer and send the control element of described MAC layer, the control element of wherein said MAC only comprises the power headroom value of the activation cell being in sub-frame of uplink.
By the invention solves two technical problems mentioned above.Make dominant base and prothetic group station learn the power rating of subscriber equipment in time at this, and can more effectively dispatch accordingly.In addition, also solve trigger PHR time associated activation community be in this situation of descending sub frame under, how to transmit the problem of PHR.
Various aspects of the present invention are more clear by the explanation by specific embodiment hereinafter.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows the flow chart for the method for the power rating of informing base station subscriber equipment under dual link communication environment according to an embodiment of the invention; And
Fig. 2 shows according to an embodiment of the invention for carrying the message format schematic diagram of the loading section of the control element of the MAC layer of PHR.
In the drawings, run through different diagrams, same or similar Reference numeral represents identical or corresponding parts or feature.
Embodiment
The present invention is based on following understanding:
1. define the new event of the PHR for DC scene:
When UE is in power limited, the UE under DC scene will trigger PHR.Propose following concept for this reason:
A) propose a kind of newly for identifying that UE is in the principle of devices in power limited situations: UE be in continuously in the first predetermined amount of time power lack situation.This first predetermined amount of time can be preset by RRC information.In one embodiment of the invention, will judge whether UE is in devices in power limited situations for power scaling (powerscaling) state.Certainly as hereinafter described in detail, UE also can define other event to identify whether himself is in devices in power limited situations.
B) propose two kinds and indicate its devices in power limited situations to base station to realize the scheme of high efficiency scheduling for UE.
I. scheme 1: relate to a kind of new MAC layer control element (MACCE), it carries the MACCE attached bag head (sub-header) of 1 byte, and does not carry MACCE load.
Ii. scheme 2: when UE is in devices in power limited situations, the UE under DC situation triggers PHR.
2., when the PHR of DC scene triggers, propose three kinds of schemes and solve the problem that activation cell is arranged in descending sub frame.
A) scheme 1: when the PHR report triggering of DC scene, for the activation cell be in descending sub frame, PHR will not comprise its power headroom value, and in PHRMACCE, indicate whether the PH information comprising main plot (Pcell) and special assisted cell (PScell).Such as redefine following bit:
I. " R " bit redefined in the bit diagram byte in MAC layer control element indicates whether the power headroom value comprising main plot (Pcell).This main plot is administered by the dominant base under dual link situation, and is in state of activation always.
Ii. the bit relevant to special assisted cell redefined in the bit diagram byte in MAC layer control element indicates whether the power headroom value comprising special assisted cell (PScell).This special assisted cell is administered by the prothetic group station under dual link situation, and also namely special prothetic group Zhan Fu community, for transmitting the upstream control signaling at prothetic group station, and is in state of activation always
B) scheme 2: when the PHR of DC scene triggers, for the community of the activation in descending sub frame calculates with reported powers margin value based on virtual transmission form or nearest sub-frame of uplink transformat and sends.
C) scheme 3: if main plot and/or special auxiliary community are arranged in descending sub frame, then postpone the calculating of PHR and report until main plot and special auxiliary community are all arranged in sub-frame of uplink.And when the PHR under DC scene reports, for the auxiliary community of other the activation be in descending sub frame, its power headroom value can not be comprised.Such as, the corresponding bit in bit map byte is set as " 0 ".
Hereafter first first problem mentioned above is set forth.To 1 be described by reference to the accompanying drawings at this.Fig. 1 shows the flow chart for the method for the power rating of informing base station subscriber equipment under dual link communication environment according to an embodiment of the invention.
1. how to base station instruction UE devices in power limited situations.
For this situation, as mentioned above, for the UE under DC scene, because the independently scheduling operation of two base station possibly devices in power limited situations will occur.For this situation, if above-mentioned devices in power limited situations is not known in two base stations, dominant base and prothetic group station are still continued to implement radical scheduling and are determined, and this scheduling determines in fact can not be implemented because transmitted power is limited in UE side.This will cause the performance of the waste of frequency resource and influential system.Therefore, it is very important that the UE allowing base station learn under DC scene is in devices in power limited situations.Following two aspects are very important for this problem of enforcement:
Aspect 1: how to identify that UE is in devices in power limited situations;
Aspect 2: how to allow base station learn that UE is in devices in power limited situations.
For aspect 1, new event can be designed and identify power limited to trigger UE.Such as, if UE is in power continuously in the first predetermined amount of time lack situation, then UE devices in power limited situations can be recognized.In order to implement the program, can high-rise configuration parameter, such as RRC be passed through, configure the first predetermined amount of time.
In describing the invention, will to be in power scaling (powerscaling) state as UE continuously at the first predetermined time period, then thinking that UE is in transmit power limited is that example is described.Certainly, UE also can define other event to identify whether himself is in devices in power limited situations.
With reference now to Fig. 1, as shown in Figure 1, in step S101, dominant base sends RRC information to UE, and this RRC information comprises the first predetermined amount of time.Preferably, this RRC information also comprises the second predetermined amount of time and the 3rd predetermined amount of time, and this will hereafter describe in detail.
In step s 102, when UE is in power scaling state continuously during the first predetermined amount of time, determine that UE is in devices in power limited situations.
For aspect 2, with reference to figure 1, in step s 103, when UE is confirmed as being in devices in power limited situations, by notice dominant base and prothetic group station, it is in devices in power limited situations to UE.
At this, following two kinds of solutions can be considered:
Scheme 1: design a kind of new MAC layer balancing boom and usually indicate dominant base and prothetic group station UE to be in devices in power limited situations;
Scheme 2: trigger PHR under extra DC scene to dominant base and prothetic group station.
For scheme 1: design a kind of simple MAC layer balancing boom newly and usually inform that dominant base and prothetic group station UE are in devices in power limited situations.This simple MAC layer control element only can carry the MAC layer control element attached bag head of 1 byte: R/R/E/LCID, and without any need for the load of MAC layer control element.Only newly defining a new Logic Channel Identifier (LogicalChannelID, LCID) at this indicates the UE under DC situation to be in devices in power limited situations.This just means that signals base UE is in devices in power limited situations by new LCID.When devices in power limited situations, the MAC layer control element of this 1 byte is sent to dominant base and prothetic group station by UE.
For scheme 2: when UE is in devices in power limited situations, UE will trigger extra PHR to dominant base and prothetic group station.Also namely, will the new event different from three events that background technology is mentioned be adopted to trigger PHR at this.This new event can be such as judge that it is in devices in power limited situations as UE, and under this event, UE will trigger PHR to two MAC entity, is also dominant base and prothetic group station.
For this situation, dominant base and prothetic group station all will recognize UE and will be in devices in power limited situations based on receiving PHR, and carry out suitable scheduling, see the step S104 in Fig. 1.
In addition, the UE under the DC situation of power limited sends PHR to after dominant base and prothetic group station, and the scheduling of guarding will be carried out in these two base stations, thus the UE power shortage situation under DC situation will be solved over time.Namely continuation operates and will not be in devices in power limited situations very soon by UE normally.
After the time period that this is of short duration, if no longer send further information to two base stations, two base stations will continue to think that UE is in devices in power limited situations and proceeds the scheduling of guarding.Obviously, this is not optimum situation, because the transmitted power of UE is not fully used.
Therefore, at this, preferably, if the situation that UE is in power limited was apprised of at dominant base and prothetic group station, then needed to allow two base stations learn that UE has got back to the situation of normal running after a while.
Referring now to the step S105 in Fig. 1, when UE is in power normal conditions continuously during the second predetermined amount of time, determine that UE is in normal operating situation.
Then, in step s 106, after UE is confirmed as being in normal operating situation and when not triggering PHR during the 3rd predetermined amount of time, notice dominant base and prothetic group station UE are in normal operating situation.
At this, also can pass through high-rise configuration parameter, such as RRC, configure the second predetermined amount of time and the 3rd predetermined amount of time.Namely except the first predetermined amount of time in the RRC information sent in step S101, the second predetermined amount of time, the 3rd predetermined amount of time is also comprised.The length of the second predetermined amount of time, the 3rd predetermined amount of time and previously described first predetermined amount of time three can be identical or different.
Above-mentioned steps also can be realized by following two schemes:
Scheme 1: use a new MAC layer balancing boom usually to indicate dominant base and prothetic group station UE whether to be in normal operating situation.The R bit that can define in the MAC layer control element of 1 byte is in devices in power limited situations or normal operating situation to distinguish UE.Thus, MAC layer balancing boom can be utilized usually to inform, and dominant base and prothetic group station UE are in devices in power limited situations or normal operating situation.Similarly, this MAC control element also can only comprise attached bag head and not comprise any load.
Particularly, if UE is in power normal conditions continuously and does not experience power scaling in the second predetermined amount of time, then the UE that can recognize under DC situation is in normal operating situation.
Then, if there is no event trigger power headroom reporting during the 3rd predetermined amount of time after recognizing UE and being in normal operating situation, then above-mentioned MAC layer control element will be sent.
Scheme 2: when UE is back to normal operating situation, needs to define another new event to trigger the PHR report of DC scene.Similarly, if UE is in power normal conditions continuously and does not experience power scaling in the second predetermined amount of time, then the UE that can recognize under DC situation is in normal operating situation.
This trigger event can be such as: if UE does not trigger PHR report within the 3rd predetermined amount of time after devices in power limited situations is back to normal operating situation, then UE will trigger PHR report, two base stations will learn that UE is back to normal operating situation thus, and and then the scheduling be more applicable to, see the step S107 in Fig. 1.
In such scheme 1 and scheme 2, in this 3rd predetermined amount of time, if trigger PHR report, then UE does not need trigger new PHR report again or send MAC layer control element, because relevant PHR information has been learned in two base stations, and knows that UE is back to normal operating situation.
Compared with scheme 1, if follow scheme 2, then need the event that definition one is new, UE can trigger the PHR report of DC scene thus, and sends to two base stations, to allow dominant base and prothetic group station learn that UE is in normal running, operates with further Optimized Operation.
Hereafter will set forth Second Problem mentioned above.
2. how to solve the problem of the uplink/downlink subframe different when triggering PHR.
Reach an agreement on as previous, DC should support FDD-TDD applicable cases and TDD-TDD applicable cases, and these two kinds of applicable cases have different uplink/downlink sub-frame configuration.
But this will produce following problem: in a cell set, a subframe will be sub-frame of uplink, and for another cell set, then be descending sub frame.This will cause following serious problem for DC, and these problems are impossible under TDDeIMTA or TDD-FDDCA scene originally.
Situation 1: when UE reports under DC scene PHR to two or a base station-such as activate event by prothetic group Zhan Fu community to trigger, the main plot of dominant base be in descending sub frame.
Situation 2: when UE reports PHR to two base station under DC scene-such as to activate event by the auxiliary community of dominant base to trigger, the special auxiliary community at prothetic group station is in descending sub frame.
Consider the configuration of traditional PHR, the PHR of the main plot of dominant base always presents and is placed on fixing position, and it is positioned at the loading section of the MAC layer control element of PHR.Therefore, in bit map byte, do not have bit whether to present to indicate the PHR of main plot.First bit the rightest untapped reason in R10/R11 of the bit map byte of Here it is PHR.Thus for said circumstances 1, should discuss in 3 gpp and how solve and define how to solve this situation to support the PHR under DC scene.
Further, according to the current agreement about the PHR under DC scene, the pH value of the type 2 of non-scheduled base station should be presented always.Further, this non-scheduled base station is dominant base or prothetic group station.
Therefore, above-mentioned two kinds of situations are also by the current agreement about the PHR under DC scene of impact.Thus need to solve when triggering PHR in a DC scene new scheme of giving a definition the problem that two cell set have different subframes.
At this, dominant base and prothetic group station are the one or more auxiliary community that the activation cell of UE configuration comprises main plot, special auxiliary community and activation.And UE sends PHR to dominant base and prothetic group station by the control element of MAC layer.When triggering PHR, at least one in activation cell is in descending sub frame, and remainder is in sub-frame of uplink.
Scheme 1: when triggering PHR, the MAC layer control element for carrying PHR only comprises the PH information of the activation cell be in sub-frame of uplink.Namely for the activation cell be in descending sub frame, its pH value is not presented.And define a new scheme, the situation that main plot and special auxiliary community are in descending sub frame situation thus can be resolved.
Scheme 2: for the activation cell being in descending sub frame when PHR triggers, UE reports that virtual PHR or the nearest sub-frame of uplink transport format information according to this activation cell report actual PHR.
Scheme 3: for the transmission of the control element of previously described situation 1 and 2, UE latency mac layer and the calculating of pH value wherein, until main plot and special auxiliary community are all in sub-frame of uplink.And when calculating and send pH value, for the auxiliary community of other general activation, if it is in descending sub frame, can not calculates and send pH value.
Hereafter will describe in detail respectively three schemes.
For scheme 1, when PHR triggers, UE can not for being in any information of cell report in descending sub frame, even if these communities are in state of activation.According to this principle, need to define new UE operation, so that the pH value being only in the activation cell under uplink situation just can be included in the MAC control element of PHR.Therefore, except the general auxiliary community except main plot and special auxiliary community, the corresponding bit in the bit map byte of PHR loading section can be arranged on, in the control element of the MAC layer of this PHR, not present these pH values to indicate.Thus, base station can not produce when the control element of its MAC layer of demodulation and obscure and do not mate.And for the main plot of macro base station and the special auxiliary community at prothetic group station, this will have problems.
As mentioned above, the pH value of main plot always presents in fixed position, in bit map byte, therefore do not have bit to indicate whether the pH value comprising main plot.Thus the base station receiving the control element of the MAC layer of PHR will think that the pH value of main plot is present in corresponding position.But according to situation 1 and scheme 1, the pH value being in the main plot in descending sub frame can not be included in the control element of the MAC layer of PHR, because main plot is in descending situation when the MAC layer control element of this PHR is triggered.Thus, existence do not mated between UE with base station, the control element of MAC layer base station being carried out to this PHR of demultiplexing has problems by this.In order to address this problem, instruction new for definition one in the control element of the MAC layer of PHR is indicated whether the pH value comprising main plot.Such as, the rightest " R " bit redefining the reservation in bit map byte achieves this end, as shown in Figure 2.Therefore, for the control element of the MAC layer of the PHR under a DC situation identified by new LCID, first bit the rightest of bit map byte should not be left in the basket, and should be read by base station.If such as this bit is 1, then present the pH value of main plot.If this bit is 0, then do not comprise the pH value of this main plot.
In addition, according to the agreement of the PHR under the current DC scene reached, when reporting the PHR under DC situation, the pH value of the type 2 of non-scheduled base station should always be comprised.If non-scheduled base station is prothetic group station, then this agreement means that the pH value of special auxiliary community should always be included in the control element of the MAC layer of PHR.This just means that the bit of the special auxiliary community at original instruction prothetic group station is useless, and can be left " R ", and the bit of the cell index of this special auxiliary community of instruction can be ignored in base station.But, as described in said circumstances 2 and scheme 1, this bit can not be retained as other use, and this bit must be used indicate whether the pH value comprising special auxiliary community.
To arrange as follows according to the present invention: such as, if this bit is 1, then comprise the pH value of special auxiliary community.And on the other hand, if this bit is 0, then do not comprise the pH value of special auxiliary community, because it is in descending situation.This is also shown in Figure 2.Further, in base station side, when receiving the control element of MAC layer of the PHR under DC situation, the bit of the cell index of this special auxiliary community of instruction is no longer ignored in base station, and this bit must be used to learn whether the pH value of special auxiliary community presents.This is for ensureing that base station can the demultiplexing control element of the MAC layer of PHR of being correlated be very important.
Therefore, in sum, for scheme 1, redefined the operation of UE, and redefined the control element form of the MAC layer of PHR, so that the operation that base station is correct.
Fig. 2 shows according to an embodiment of the invention for carrying the message format schematic diagram of the loading section of the control element of the MAC layer of PHR.Therefore, according to scheme 1, the control element being used herein to the MAC layer sending PHR will only comprise the power headroom value of the activation cell being in sub-frame of uplink.Further, as shown in Figure 2, indicate whether to comprise the pH value of main plot respectively by being provided with two bits in the load in addition and whether comprising the pH value of special auxiliary community.In the present invention, the pH value of certain community refers to the power headroom value of UE for this cell measurement.
For scheme 2, even if a community is in descending sub frame, still can come together to calculate and report relevant pH value to the pH value of other communities.But because this community is in descending sub frame, therefore there is no uplink when triggering PHR.Set forth below is two subschemes for being in the activation cell calculating pH value in descending sub frame.
Subscheme 1: the pH value calculating the activation cell be in descending sub frame according to virtual transmission form.
Subscheme 2: the pH value calculating the activation cell be in descending sub frame according to the transformat of nearest sub-frame of uplink.
For subscheme 1: be that virtual pH value is reported in the activation cell be in descending sub frame when triggering PHR.For subscheme 2, if an activation cell is in descending sub frame when triggering PHR, then UE calculates pH value based on the nearest sub-frame of uplink transformat of corresponding community.No matter which kind of scheme be all that pH value is reported in all activation cells when triggering PHR, and no matter it is in downlink or uplink subframe.
Always namely the pH value of main plot and special auxiliary community will be included, and the situation of no matter main plot and special auxiliary community.Therefore, the form for the control element of the MAC layer of PHR does not have impact.
In sum, the control element according to the MAC layer of scheme 2 will comprise power She value of the activation cell being in sub-frame of uplink.In addition, for the activation cell being in descending sub frame, according to transformat rated output She value of virtual transmission form or the nearest sub-frame of uplink according to activation cell, and be also included in the control element of MAC layer.
In addition, for scheme 2, the R10 principle for the fixed position of the pH value of main plot will be suitable in the dual link scene of R12.In addition, the pH value of the type 2 of non-scheduled base station will be reported always, namely still supports that the PHR under current DC situation reaches an agreement on.
For scheme 3, when triggering the PHR under DC situation, if main plot and/or special auxiliary community are in descending sub frame, then postpone the transmission of the calculating of the pH value of being correlated with and the control element of MAC layer until main plot and special auxiliary community are all in sub-frame of uplink.
And for other the auxiliary communities be in when triggering the PHR under DC situation in descending sub frame, can not comprise pH value at the control element of MAC layer, the corresponding bit namely in bit map byte is set to 0.
This just means that main plot and special auxiliary community are all in sub-frame of uplink when final transmission MAC layer control element.And finally send MAC layer control element and comprise all pH values being in the activation cell of sub-frame of uplink, such as be in the pH value of the auxiliary community of the activation of sub-frame of uplink, main plot and special auxiliary community, and for being in the auxiliary community of activation of descending sub frame, then in the control element of MAC layer, corresponding bit is set to 0.
The program can ensure to be presented for the PH of main plot and special auxiliary community always, therefore can not have an impact to the design of the form of the control element of the MAC layer of PHR.Because based on the program 3, easily can support that the type 2 of non-scheduled base station always by this agreement of report, and will follow R10 rule, namely the pH value of main plot is always presented and is arranged on fixed position.
It should be noted that, above-described embodiment is only exemplary, but not limitation of the present invention.Any technical scheme not deviating from spirit of the present invention all should fall within protection scope of the present invention, and this comprises the different technologies feature that use occurs in different embodiments, and method can combine, to obtain beneficial effect.
Claims (15)
1. one kind under dual link communication environment in a user device for the method for the power rating of informing base station subscriber equipment, wherein, described base station comprises dominant base and prothetic group station, and described subscriber equipment and described dominant base and described prothetic group station form dual link, and described method comprises:
B., when described subscriber equipment is in power shortage situation continuously during the first predetermined amount of time, determine that described subscriber equipment is in devices in power limited situations; And
C., when described subscriber equipment is confirmed as being in described devices in power limited situations, notify that described in described dominant base and described prothetic group station, subscriber equipment is in described devices in power limited situations.
2. method according to claim 1, is characterized in that, to notify described in described dominant base and described prothetic group station that subscriber equipment is in described devices in power limited situations and comprise further in described step C:
C1. send the control element of the first MAC layer to described dominant base and described prothetic group station, it indicates described subscriber equipment to be in described devices in power limited situations.
3. method according to claim 2, is characterized in that, the control element of described first MAC layer only comprises attached bag head, and the Logic Channel Identifier in described attached bag head is set to indicate described subscriber equipment to be in described devices in power limited situations.
4. method according to claim 1, is characterized in that, to notify described in described dominant base and described prothetic group station that subscriber equipment is in described devices in power limited situations and comprise further in described step C:
C2. send first power She to described dominant base and described prothetic group station and measure report.
5. method according to claim 1, is characterized in that, before described step B, also comprise steps A:
Receive RRC information from described dominant base, described RRC information comprises described first predetermined amount of time.
6. method according to claim 5, is characterized in that, described RRC information also comprises the second predetermined amount of time and the 3rd predetermined amount of time, and described method also comprises the steps:
D., when described subscriber equipment is in power normal conditions continuously during described second predetermined amount of time, determine that described subscriber equipment is in normal operating situation; And
When E. there is no trigger power headroom reporting after described subscriber equipment is confirmed as being in described normal operating situation and during described 3rd predetermined amount of time, notify that described in described dominant base and described prothetic group station, subscriber equipment is in described normal operating situation.
7. method according to claim 6, is characterized in that, to notify described in described dominant base and described prothetic group station that subscriber equipment is in described normal operating situation and comprise further in described step e:
E1. send the control element of the second MAC layer to described dominant base and described prothetic group station, it indicates described subscriber equipment to be in described normal operating situation.
8. method according to claim 7, is characterized in that, the control element of described second MAC layer only comprises attached bag head, and the reservation bit in described attached bag head is set to indicate described subscriber equipment to be in described devices in power limited situations.
9. method according to claim 6, is characterized in that, to notify described in described dominant base and described prothetic group station that subscriber equipment is in described normal operating situation and comprise further in described step e:
E2. the second power headroom reporting (PHR) is sent to described dominant base and described prothetic group station.
10. under dual link communication environment in a base station for receiving a method for the power rating of subscriber equipment, wherein, described base station comprises dominant base and prothetic group station, and described subscriber equipment and described dominant base and described prothetic group station form dual link, and described method comprises:
B. from described subscriber equipment reception notification, it indicates described subscriber equipment to be in described devices in power limited situations; And
C. based on described notice, described subscriber equipment is dispatched.
11. methods according to claim 10, is characterized in that, described step b comprises further:
B1. receive the control element of the first MAC layer from described subscriber equipment, it indicates described subscriber equipment to be in described devices in power limited situations; Or
B2. the first power headroom reporting (PHR) is received from described subscriber equipment.
12. methods according to claim 10, is characterized in that, also comprise the steps:
D. receive another notice from described subscriber equipment, it indicates described subscriber equipment to be in normal operating situation; And
E. based on another notice described, described subscriber equipment is dispatched.
13. methods according to claim 12, is characterized in that, described steps d comprises further:
D1. receive the control element of the second MAC layer from described subscriber equipment, it indicates described subscriber equipment to be in described normal operating situation; Or
D2. the second power headroom reporting (PHR) is received from described subscriber equipment.
14. methods according to claim 10, is characterized in that, when described base station is described dominant base, before described step b, also comprise step a:
A. send RRC information to described subscriber equipment, described RRC information comprises the first predetermined amount of time, the second predetermined amount of time and the 3rd predetermined amount of time.
15. 1 kinds of methods in a user device for supporting power headroom reporting (PHR) to transmit under dual link communication environment, wherein, described subscriber equipment and dominant base and prothetic group station form dual link, described dominant base administers a main plot and one or more auxiliary community, a special auxiliary community and one or more auxiliary community are administered in described prothetic group station, activation cell for described user device configuration comprises described main plot, the one or more auxiliary community of described special auxiliary community and activation, described subscriber equipment sends described power headroom reporting (PHR) to described dominant base and described prothetic group station by the control element of MAC layer, when triggering described power headroom reporting (PHR), at least one in described activation cell is in descending sub frame, described method comprises:
In the control element of described MAC layer, only comprise the power headroom value of the activation cell being in sub-frame of uplink, and in described MAC layer control element, indicate whether the power headroom value comprising described main plot and described special auxiliary community; Or
The power headroom value of the activation cell being in sub-frame of uplink is comprised at the control element of described MAC layer, and for being in the activation cell of described descending sub frame, according to the transformat rated output margin value of virtual transmission form or the nearest sub-frame of uplink according to described activation cell, and be included in the control element of described MAC layer; Or
If described main plot and/or described special auxiliary community are in described descending sub frame, then postpone the transmission of the control element of described MAC layer until described main plot and described special auxiliary community are all in sub-frame of uplink, if the one or more auxiliary community of described activation is in described descending sub frame, then do not comprise its power headroom value at the control element of described MAC layer and send the control element of described MAC layer, the control element of wherein said MAC only comprises power She value of the activation cell being in sub-frame of uplink.
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