CN101945424B - A kind of method for reporting of margin of power and subscriber equipment - Google Patents

A kind of method for reporting of margin of power and subscriber equipment Download PDF

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Publication number
CN101945424B
CN101945424B CN201010167341.XA CN201010167341A CN101945424B CN 101945424 B CN101945424 B CN 101945424B CN 201010167341 A CN201010167341 A CN 201010167341A CN 101945424 B CN101945424 B CN 101945424B
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component carrier
power margin
power
subframe
mac layer
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CN101945424A (en
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朱鹏
喻斌
杜忠达
梁春丽
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ZTE Corp
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ZTE Corp
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Priority to CN201010167341.XA priority Critical patent/CN101945424B/en
Priority to PCT/CN2010/077112 priority patent/WO2011137619A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/365—Power headroom reporting

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a kind of method for reporting and subscriber equipment of margin of power, the method comprises: the type information of described margin of power, when reporting margin of power, is also sent to base station by subscriber equipment together; Described margin of power comprises subscriber equipment total power margin and component carrier margin of power.Adopt the method, subscriber equipment can to base station repeats component carrier margin of power and subscriber equipment total power margin, carry out scheduling of resource for base station and link circuit self-adapting provides enough margin of power information, be particularly useful for the evolution LTE system that have employed carrier aggregation.

Description

Reporting method of power margin and user equipment
Technical Field
The present invention relates to the field of communications, and in particular, to a power margin reporting method and a user equipment.
Background
In a 3GPP LTE (The 3rd Generation Partnership Project Long term evolution), uplink power Control (uplink power Control, which may be referred to as uplink power Control or power Control) is used to Control The transmission power of a physical uplink Channel (uplink physical Channel) to compensate for The path loss and shadowing fading of The Channel and suppress inter-cell interference. The Uplink Physical Channel controlled by the Uplink power Control includes a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), and a Sounding Reference Signal (SRS). The LTE uplink power control adopts a control mode combining open loop (open loop) and closed loop (closed loop).
For a User Equipment (UE) in an LTE system, the transmission power of a PUSCH in a subframe i is defined as:
PPUSCH(i)＝min{PCMAX，10log10(MPUSCH(i))+PO_PUSCH(j)+α(j)·PL+ΔTF(i)+f(i)}[dBm]
wherein: i is a natural number, indicating the sub frame number, "is]"inner letters denote units of parameters, PCMAXThe Configured Maximum Configured output power of the UE (the Configured Maximum UE output power) is set, and the value range thereof is determined by a plurality of parameters, including: maximum UE power (the maximum UE power) determined by the UE power class (the UE power class), System configured IE P-Max (maximum configured Power), maximum configured output Power offset (P)CMAXtolerance), Maximum Power Reduction (MPR) and additional Maximum Power Reduction (a-MPR) due to operating band, system bandwidth, modulation order, transmission bandwidth location, transmission bandwidth configuration, etc.;
MPUSCH(i) is the PUSCH bandwidth transmitted on subframe i, whose value is represented by the number of Resource Blocks (RBs);
PO_PUSCH(j) is an open loop power control parameter with a cell specific quantity PO_NOMINAL_PUSCH(j) And a UE specific (UE specific) quantity PO_UE_PUSCH(j) The sum of (1); wherein j ═ 0 corresponds to PUSCH transmission in a semi-persistent scheduled (semi-persistent scheduled) state, j ═ 1 corresponds to PUSCH transmission in a dynamic scheduled (dynamic scheduled) state, and j ═ 2 corresponds to PUSCH transmission scheduled by a random access response (rar);
α is a cell-specific path loss compensation factor. When j is 0 or 1, α (j) ∈ {0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1 }; when j is 2, α (j) is 1. When alpha is 1, the complete path loss compensation is carried out, and alpha is less than 1, the partial path loss compensation is carried out;
PL is the downlink pathloss estimate (the downlink pathloss estimate) measured and calculated at the UE side;
ΔTF(i) is a Modulation Coding Scheme (MCS) related power offset;
f (i) is the current PUSCH power control adjustment state. According to the configuration of high-level parameters, when the accumulated value is power controlled, f (i) ═ f (i-1) +PUSCH(i-KPUSCH) (ii) a When the absolute value is controlled, f (i) ═ fPUSCH(i-KPUSCH). Wherein,PUSCHis a UE-specific closed loop correction value, also known as a transmit power control command (TPC command).PUSCH(i-KPUSCH) Is in sub-frame i-KPUSCHAnd the upper base station sends a transmission power control command to the user equipment. For Frequency Division Duplex (FDD) systems, KPUSCH4; time Division Duplex (TDD) system, KPUSCHThe value of (a) is related to the Uplink-downlink configurations of the system.
The transmission power of the PUSCH estimated by the UE according to the open-loop and closed-loop power control parameters, the instruction and the path loss estimation of the base station and the number of the resource blocks of the PUSCH sent on the subframe i is as follows:
PPUSCH′(i)＝10log10(MPUSCH(i))+PO_PUSCH(j)+α(j)·PL+ΔTF(i)+f(i)
in the LTE system, the transmission power of the PUCCH of the UE on subframe i is defined as:
PPUCCH(i)＝min{PCMAX，PO_PUCCH+PL+h(nCQI，nHARQ)+ΔF_PUCCH(F)+g(i)}[dBm]
wherein: pCMAXThe definition of (1) is as above;
PO_PUCCHis an open-loop power control parameter with a value equal to a cell-specific quantity PO_NOMINAL_PUCCHAnd one UE-specific quantityPO_UE_PUCCHThe sum of (1);
ΔF_PUCCH(F) is a power offset associated with PUCCH format F (PUCCH format (F)), the value of which is configured by higher layers;
h (n) is a value based on the PUCCH format F, where nCQIIs the information bit number of CQI (Channel quality indicator), nHARQA number of bits of HARQ (Hybrid automatic retransmission Request);
g (i) is the current PUCCH power control adjustment state, PUCCHis a UE-specific closed loop correction value, also known as the transmit power control command (TPCcommand).
The transmission power of the PUCCH estimated by the UE according to the open-loop and closed-loop power control commands of the base station, the path loss estimation and the PUCCH format sent on the subframe i is as follows:
PPUCCH′(i)＝PO_PUCCH+PL+h(nCQI，nHARQ)+ΔF_PUCCH(F)+g(i)。
it should be noted that, in the LTE system, in order to maintain the single carrier characteristic of the uplink signal, it is impossible for one UE to simultaneously transmit PUSCH and PUCCH.
In order to enable the base station to know the margin between the maximum configuration output Power set by a certain UE and the estimated transmit Power of the physical uplink channel scheduled by the UE at a certain time, so as to provide a basis for the base station to perform resource scheduling and link adaptation, the UE needs to calculate its own Power margin PH (also called Power Headroom) and report it to the base station. In the LTE system, the power margin of a certain UE on subframe i is defined as:
PH(i)＝PCMAX-{10log10(MPUSCH(i))+PO_PUSCH(j)+α(j)·PL+ΔTF(i)+f(i)}[dB]
i.e. the power margin of the UE on subframe i is equal to the difference between the maximum configured output power set by the UE and the estimated PUSCH transmit power of the UE. The power margin obtained by calculation is quantized in the range of [ -23, 40] dB, the closest integer value is taken with 1dB as accuracy (quantization relation is shown in table 1), and then the physical layer transfers to the higher layer. The Media Access Control Layer (MAC Layer) uses 6bits index to represent the quantized power margin, the mapping relationship is shown in table 1, and the 6bits index is also called power margin.
TABLE 1 correspondence of quantized values and indices of Power margins
PH index Level of power margin Calculating a quantization value (dB)
0 POWER_HEADROOM_0 -23≤PH＜-22
1 POWER_HEADROOM_1 -22≤PH＜-21
2 POWER_HEADROOM_2 -21≤PH＜-20
3 POWER_HEADROOM_3 -20≤PH＜-19
4 POWER_HEADROOM_4 -19≤PH＜-18
5 POWER_HEADROOM_5 -18≤PH＜-17
… … …
57 POWER_HEADROOM_57 34≤PH＜35
58 POWER_HEADROOM_58 35≤PH＜36
59 POWER_HEADROOM_59 36≤PH＜37
60 POWER_HEADROOM_60 37≤PH＜38
61 POWER_HEADROOM_61 38≤PH＜39
62 POWER_HEADROOM_62 39≤PH＜40
63 POWER_HEADROOM_63 PH≥40
Further, a Power Head Report (PHR) of the Power margin is event-triggered. When the UE has new uplink data to be transmitted in the current subframe, an event triggers a power margin report, and channel resources allocated by the base station for PUSCH transmission of the UE are enough to bear a power margin MAC layer Control unit (Power Headroom MAC Control Element) and an MAC layer protocol data unit subheader (MAC PDUubheader) of the power margin MAC layer Control unit according to a certain logical channel priority sequence, the UE reports the power margin index of 6bits to the base station through the power margin MAC layer Control unit.
The structure of the power margin MAC layer control element is shown in fig. 1, which is 1 octet (octet), wherein the highest 2 bits are reserved bits (denoted by R), which are usually set to '0', and the lower 6bits are the reported power margin (denoted by PH index).
The power margin MAC layer control unit is identified by a MAC layer protocol data unit subheader containing a 5bits Logical Channel Identification (LCID), and the LCID is 11010.
It is noted that in LTE systems, the power margin is only calculated for the sub-frame transmitting PUSCH.
An LTE-Advanced system (evolved LTE system, also abbreviated as LTE-a system) is a next-generation evolved system of the LTE system. As shown in fig. 2, the LTE-a system extends a transmission bandwidth by using a carrier aggregation (carrier aggregation) technique, and each aggregated carrier is referred to as a "component carrier". The multiple component carriers may be consecutive (e.g., the interval between component carrier #1 and component carrier #2 in fig. 2 is 0), or non-consecutive (e.g., the interval between component carrier #2 and component carrier #3 in fig. 2), and may be located in the same frequency band (operating band), or may be located in different frequency bands.
In the LTE-a system, the user equipment may transmit one PUSCH on one (uplink) component carrier, or may simultaneously transmit a plurality of PUSCHs on a plurality of (uplink) component carriers, respectively. In addition, it is also possible to transmit multiple physical uplink control channels PUCCH on one (uplink) component carrier, and to simultaneously transmit PUSCH and PUCCH on one (uplink) component carrier.
In view of the complexity and diversity of the carrier aggregation scenario and the structure of the UE transmitter, in the prior art, two threshold values of the transmission power are defined, which are the maximum transmission power of the component carrier (aCC-specific max power) and the maximum total transmission power of the UE (a UE-specific max power, a max power for the total UE transmit power). The transmission power of the user equipment on each component carrier must not exceed the maximum transmission power of the component carrier, and the total transmission power of the user equipment must not exceed the maximum total transmission power of the user equipment. Once any one of the threshold values is exceeded, the transmission power of the corresponding physical uplink channel must be reduced.
Furthermore, in the prior art, calculation and report based on the power margin of the component carriers (that is, the user equipment calculates the power margin on each component carrier, and then reports to the base station, respectively, and is called component carrier power margin) and calculation and report based on the total power margin of the user equipment (that is, the user equipment calculates the difference between the maximum total transmission power of the user equipment and the sum of the estimated transmission powers of each relevant physical uplink channel, and then reports to the base station, and is called user equipment total power margin) are proposed, respectively.
Therefore, how to report the two types of power margins to the base station by the user equipment in the LTE-a system adopting carrier aggregation provides sufficient power margin information for resource scheduling and link adaptation of the base station, enables the base station to clearly distinguish the types of the reported power margins, and saves signaling overhead, which is an urgent problem to be solved.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for reporting power margin and a user equipment, so as to solve the problem that the user equipment cannot report two types of power margins to a base station in the prior art.
In order to solve the above problem, the present invention provides a method for reporting a power margin, including:
when the user equipment reports the power allowance, the user equipment also sends the type information of the power allowance to a base station;
the power margin includes a user equipment total power margin and a component carrier power margin.
Further, the method can also have the following characteristics:
the user equipment carries the type information of the power margin with the highest bit and/or the second highest bit of a power margin Medium Access Control (MAC) layer control unit.
Further, the method can also have the following characteristics:
the user equipment carries the type information of the power margin by a Logical Channel Identification (LCID) in a MAC layer protocol data unit subheader of a power margin MAC layer control unit.
Further, the method can also have the following characteristics:
the UE transmits new uplink data on a subframe, and on the subframe, the UE total power margin report is triggered at least once by an event since the last UE total power margin report, or the UE total power margin report of the UE is triggered for the first time on the subframe, and at least one Physical Uplink Shared Channel (PUSCH) sent by the UE on the subframe meets a preset condition, and the UE reports the UE total power margin.
Further, the method can also have the following characteristics:
when the user equipment reports the total power allowance of the user equipment on a subframe, the index of the total power allowance of the user equipment and the type information of the total power allowance of the user equipment are loaded in a power allowance MAC layer control unit and an MAC layer protocol data unit subhead thereof, and a PUSCH which meets the preset condition is selected to send the power allowance MAC layer control unit and the MAC layer protocol data unit subhead thereof to a base station.
Further, the method can also have the following characteristics:
the preset conditions include:
and the PUSCH is any PUSCH which has new uplink data transmission on the subframe and has enough uplink resources to report the total power margin of the user equipment according to the preset logic channel priority.
Further, the method can also have the following characteristics:
the preset conditions include:
and the PUSCH is a PUSCH which has new uplink data transmission on the subframe, has enough uplink resources allocated to report the total power margin of the user equipment according to the preset logic channel priority and is positioned on a specific component carrier.
Further, the method can also have the following characteristics:
the UE transmits new uplink data on a subframe, and for a certain component carrier on the subframe, the component carrier power margin report of the certain component carrier is triggered at least once by an event since the last component carrier power margin report, or the component carrier power margin report of the certain component carrier on the subframe is triggered for the first time, and at least one PUSCH (physical uplink shared channel) sent by the UE on the subframe meets a preset condition, and the UE reports the total power margin of the UE.
Further, the method can also have the following characteristics:
when the user equipment reports a component carrier power allowance on a subframe, the index of the component carrier power allowance and the type information of the component carrier power allowance are loaded in a power allowance MAC layer control unit and an MAC layer protocol data unit subhead thereof, and a PUSCH meeting the preset condition is selected to send the power allowance MAC layer control unit and the MAC layer protocol data unit subhead thereof to a base station.
Further, the method can also have the following characteristics:
the preset conditions include:
and the PUSCH is any PUSCH which has new uplink data transmission on the subframe and has enough uplink resources to report the power allowance of the component carrier according to the preset logic channel priority.
Further, the method can also have the following characteristics:
the preset conditions include:
and the PUSCH is a PUSCH which has new uplink data transmission on the subframe, is distributed with uplink resources enough to report the power allowance of the component carrier according to the preset logic channel priority and is positioned on a specific component carrier.
Further, the method can also have the following characteristics:
if the UE transmits new uplink data on a component carrier on a subframe, and the UE has been triggered at least once by an event since the last CC power margin report on the subframe, or has been triggered for the first time on the subframe, and the UE reports the CC power margin if uplink resources allocated to PUSCH transmitted on the CC on the subframe are sufficient for reporting the CC power margin, the UE reports the CC power margin.
Further, the method can also have the following characteristics:
when the user equipment reports a component carrier power allowance on a subframe, the index of the component carrier power allowance and the type information of the component carrier power allowance are loaded in a power allowance MAC layer control unit and an MAC layer protocol data unit subhead thereof, and a PUSCH on a component carrier corresponding to the component carrier power allowance is selected to send the power allowance MAC layer control unit and the MAC layer protocol data unit subhead thereof to a base station.
In order to solve the above technical problem, the present invention further provides a ue for reporting a power margin to a base station, where the ue includes an operation module, an acquisition module, and a transmission unit, where:
the operation module is used for calculating a power margin;
the obtaining module is used for obtaining the type information of the power margin;
and the sending module is used for sending the calculated power margin and the type information thereof together.
Further, the user equipment may further have the following characteristics:
still include a encapsulation module, wherein:
the encapsulating module is configured to encapsulate the type information of the power margin acquired by the acquiring module in a highest bit and/or a second highest bit of a Medium Access Control (MAC) layer control unit of the power margin, and then send the highest bit and/or the second highest bit to the sending module.
Further, the user equipment may further have the following characteristics:
still include a encapsulation module, wherein:
the encapsulating module is configured to encapsulate the type information of the power margin acquired by the acquiring module in a Logical Channel Identity (LCID) in a MAC layer protocol data unit subheader of a power margin MAC layer control unit, and then send the LCID to the sending module.
Further, the user equipment may further have the following characteristics:
the sending module is configured to send new uplink data on a subframe, and send a total power margin report of the ue at least once triggered by an event since a last ue total power margin report on the subframe, or send the calculated power margin and type information thereof when a Physical Uplink Shared Channel (PUSCH) sent by the ue on the subframe meets at least one preset condition and the ue total power margin report is triggered for the first time on the subframe.
Further, the user equipment may further have the following characteristics:
the packaging module is used for loading the index of the total power margin of the user equipment and the type information of the total power margin of the user equipment into a power margin MAC layer control unit and an MAC layer protocol data unit subhead thereof and then sending the power margin MAC layer control unit and the MAC layer protocol data unit subhead to the sending module;
and the sending module is used for selecting a PUSCH meeting a preset condition to send the power margin MAC layer control unit and the MAC layer protocol data unit subhead thereof to a base station when the total power margin of the user equipment is reported on a subframe.
Further, the user equipment may further have the following characteristics:
the preset conditions include:
and the PUSCH is any PUSCH which has new uplink data transmission on the subframe and has enough uplink resources to report the total power margin of the user equipment according to the preset logic channel priority.
Further, the user equipment may further have the following characteristics:
the preset conditions include:
and the PUSCH is a PUSCH which has new uplink data transmission on the subframe, has enough uplink resources allocated to report the total power margin of the user equipment according to the preset logic channel priority and is positioned on a specific component carrier.
Further, the user equipment may further have the following characteristics:
the sending module is configured to transmit new uplink data on a subframe, and in the subframe, for a certain component carrier, since a last component carrier power margin report is performed, the component carrier power margin report of the certain component carrier has been triggered at least once by an event, or the component carrier power margin report of the certain component carrier on the subframe is triggered for the first time, and when at least one PUSCH sent by the user equipment on the subframe meets a preset condition, the calculated power margin and type information thereof are sent out.
Further, the user equipment may further have the following characteristics:
the packaging module is used for loading the index of the component carrier power allowance and the type information of the component carrier power allowance into a power allowance MAC layer control unit and an MAC layer protocol data unit subhead thereof and then sending the power allowance MAC layer control unit and the MAC layer protocol data unit subhead to the sending module;
and the sending module is used for selecting a PUSCH meeting a preset condition to send the power margin MAC layer control unit and the MAC layer protocol data unit subhead thereof to the base station when the power margin of a component carrier is reported on a subframe.
Further, the user equipment may further have the following characteristics:
the preset conditions include:
and the PUSCH is any PUSCH which has new uplink data transmission on the subframe and has enough uplink resources to report the power allowance of the component carrier according to the preset logic channel priority.
Further, the user equipment may further have the following characteristics:
the preset conditions include:
and the PUSCH is a PUSCH which has new uplink data transmission on the subframe, is distributed with uplink resources enough to report the power allowance of the component carrier according to the preset logic channel priority and is positioned on a specific component carrier.
Further, the user equipment may further have the following characteristics:
the sending module is configured to transmit new uplink data on a certain component carrier on a subframe, and on the subframe, for the component carrier, a component carrier power margin report of the component carrier is triggered at least once since a last component carrier power margin report, or the component carrier power margin report of the component carrier is triggered for the first time on the subframe, and the ue sends the calculated power margin and type information thereof when uplink resources allocated to a PUSCH sent on the component carrier on the subframe are sufficient to report the component carrier power margin.
Further, the user equipment may further have the following characteristics:
the packaging module is used for loading the index of the component carrier power allowance and the type information of the component carrier power allowance into a power allowance MAC layer control unit and an MAC layer protocol data unit subhead thereof and then sending the power allowance MAC layer control unit and the MAC layer protocol data unit subhead to the sending module;
the sending module is used for selecting a PUSCH on a component carrier corresponding to a component carrier power margin when the component carrier power margin is reported on a certain subframe, and sending the power margin MAC layer control unit and the MAC layer protocol data unit subhead thereof to a base station.
The reporting method of the power margin and the user equipment are particularly suitable for an evolution LTE system adopting carrier aggregation, the user equipment reports the power margin of the component carrier and the total power margin of the user equipment to the base station, sufficient power margin information is provided for resource scheduling and link adaptation of the base station, and signaling cost is saved.
Drawings
Fig. 1 is a schematic structural diagram of a power margin MAC layer control unit in an LTE system in the prior art;
fig. 2 is a schematic diagram of carrier aggregation of an LTE-a system in the prior art;
fig. 3 is a flowchart illustrating a method for reporting a total power margin of a ue according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a first method for reporting a power margin of a component carrier according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a second method for reporting power margin of a component carrier according to an embodiment of the present invention;
fig. 6 is a block diagram of a structure of a ue according to an embodiment of the present invention.
Detailed Description
The invention provides a reporting method of a power margin and user equipment, and the basic concept is as follows: and when the user equipment reports the power allowance, the user equipment also sends the type information of the power allowance to the base station together. In this way, the base station can clearly distinguish the kind of reported power margin. Meanwhile, the invention can well save signaling overhead by skillfully designing a scheme for bearing the type information of the power margin.
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Referring to fig. 3, a method for reporting a total power margin of a ue according to an embodiment of the present invention is shown in the figure, including the following steps:
step S301: when a ue has new uplink data transmission on a subframe, and on the subframe, a ue total power margin report has been event-triggered at least once since a last ue total power margin report for the ue, or the ue total power margin report for the ue is first triggered on the subframe, and at least one Physical Uplink Shared Channel (PUSCH) transmitted by the ue on the subframe meets a preset condition, the method proceeds to step S302;
the preset condition may be that the PUSCH is any PUSCH in which there is new uplink data transmission on the subframe and the uplink resource allocated according to the preset logical channel priority is sufficient for reporting the total power margin of the user equipment.
The preset condition may be that the PUSCH is a PUSCH on which there is new uplink data transmission on the subframe, and the uplink resource allocated according to the preset logical channel priority is sufficient for reporting the total power margin of the user equipment and is located on a specific component carrier.
The specific component carrier is a preset component carrier or a component carrier configured through high-level signaling.
The uplink resource is enough to report the total power margin of the user equipment, which means that the uplink resource is enough to bear the power margin MAC layer control unit containing the total power margin of the user equipment and the MAC layer protocol data unit subhead thereof.
Step S302: the user equipment packages the index of the total power margin of the user equipment in a power margin MAC layer control unit, packages the type information of the total power margin of the user equipment in the highest bit and/or the second highest bit of the power margin MAC layer control unit, and enters the step S303;
step S303: and the user equipment sends out the power margin MAC layer control unit encapsulated with the total power margin of the user equipment and the type information thereof and the MAC layer protocol data unit subhead of the power margin MAC layer control unit through the PUSCH which accords with the preset condition, and the operation is finished.
In another embodiment, the ue may further use a Logical Channel Identifier (LCID) in a MAC layer protocol data unit subheader of a power margin MAC layer control unit to carry the type information of the power margin, that is, encapsulate an index of a total power margin of the ue in a power margin MAC layer control unit, encapsulate the type information of the total power margin of the ue in the LCID in the MAC layer protocol data unit subheader of the power margin MAC layer control unit, and then send the power margin MAC layer control unit encapsulated with the total power margin of the ue and the type information thereof and the MAC layer protocol data unit subheader of the power margin MAC layer control unit via the PUSCH meeting the predetermined condition.
Referring to fig. 4, a diagram illustrates a first method for reporting a power margin of a component carrier according to an embodiment of the present invention, including the following steps:
step S401: the method comprises the steps that user equipment transmits new uplink data on a subframe, and on the subframe, for a certain component carrier, a component carrier power margin report of the certain component carrier is triggered at least once by an event since the last component carrier power margin report, or the component carrier power margin report of the certain component carrier is triggered for the first time on the subframe, and when at least one PUSCH sent by the user equipment on the subframe meets a preset condition, the method enters a step S402;
the preset condition may be that the PUSCH is any PUSCH in which there is new uplink data transmission on the subframe and the allocated uplink resource is sufficient for reporting the power margin of the component carrier according to a preset logical channel priority.
The predetermined condition may be that the PUSCH is a PUSCH on a specific component carrier, where there is new uplink data transmission on the subframe, and the allocated uplink resource is sufficient for reporting the power margin of the component carrier according to a predetermined logical channel priority.
The specific component carrier is a preset component carrier or a component carrier configured through high-level signaling.
The distributed uplink resources are enough to report the power allowance of the component carrier, namely the distributed uplink resources are enough to bear the power allowance MAC layer control unit containing the power allowance of the component carrier and the MAC layer protocol data unit subhead thereof.
Step S402: the UE encapsulates the index of the component carrier power allowance in a power allowance MAC layer control unit, encapsulates the type information of the component carrier power allowance in the highest bit and/or the second highest bit of the power allowance MAC layer control unit, and enters step S403;
step S403: and the user equipment sends out the power allowance MAC layer control unit encapsulated with the component carrier power allowance and the type information thereof and the MAC layer protocol data unit subhead of the power allowance MAC layer control unit through the PUSCH which accords with the preset condition, and the operation is finished.
In another embodiment, the ue may further carry the type information of the power margin with a Logical Channel Identifier (LCID) in a MAC layer protocol data unit subheader of a power margin MAC layer control unit, that is, encapsulate an index of the component carrier power margin in a power margin MAC layer control unit, encapsulate the type information of the component carrier power margin in the LCID in the MAC layer protocol data unit subheader of the power margin MAC layer control unit, and then send the power margin MAC layer control unit encapsulated with the component carrier power margin and the type information thereof and the MAC layer protocol data unit subheader of the power margin MAC layer control unit via the PUSCH meeting the predetermined condition.
Referring to fig. 5, a diagram illustrates a second method for reporting a power margin of a component carrier according to an embodiment of the present invention, including the following steps:
step S501: a ue transmits new uplink data on a certain component carrier on a subframe, and on the subframe, for the component carrier, a component carrier power margin report of the ue has been triggered at least once by an event since a last component carrier power margin report, or the component carrier power margin report of the ue is triggered for the first time on the subframe, and uplink resources allocated to a PUSCH transmitted by the ue on the component carrier on the subframe are sufficient to report the component carrier power margin, and then the method proceeds to step S502;
the distributed uplink resources are enough to report the power allowance of the component carrier, namely the distributed uplink resources are enough to bear the power allowance MAC layer control unit containing the power allowance of the component carrier and the MAC layer protocol data unit subhead thereof.
Step S502: the UE encapsulates the index of the component carrier power allowance in a power allowance MAC layer control unit, encapsulates the type information of the component carrier power allowance in the highest bit and/or the second highest bit of the power allowance MAC layer control unit, and enters step S503;
step S503: and the user equipment sends out the power margin MAC layer control unit encapsulated with the power margin and the type information of the component carrier and the MAC layer protocol data unit subhead of the power margin MAC layer control unit through the PUSCH on the component carrier, and the operation is finished.
In another embodiment, the ue may further carry the type information of the power margin with a Logical Channel Identifier (LCID) in a MAC layer protocol data unit subheader of a power margin MAC layer control unit, that is, encapsulate an index of the component carrier power margin in a power margin MAC layer control unit, encapsulate the type information of the component carrier power margin in the LCID in the MAC layer protocol data unit subheader of the power margin MAC layer control unit, and then send the power margin MAC layer control unit encapsulated with the component carrier power margin and the type information thereof and the MAC layer protocol data unit subheader of the power margin MAC layer control unit via a PUSCH on the component carrier.
In the embodiment of the invention, the user equipment can bear the type information of the power margin by the highest bit and/or the second highest bit of the power margin MAC layer control unit, namely, the reserved bit in the power margin MAC layer control unit is skillfully utilized to realize the identification of the type of the power margin, so that the signaling cost can be effectively saved while the type of the power margin is reported. In addition, the embodiment of the invention can also use the Logical Channel Identifier (LCID) in the MAC layer protocol data unit subhead of the power margin MAC layer control unit to bear the type information of the power margin, thereby realizing the reporting of the type of the power margin and effectively saving the signaling cost.
By adopting the method of the embodiment of the invention, the user equipment can respectively report the power margin of the component carrier and the total power margin of the user equipment to the base station, wherein the report of the total power margin of the user equipment is mutually independent with the report of the power margin of the component carrier, and the reports of the power margins of the component carriers of all the component carriers are mutually independent. The base station can clearly know the type and the content of the reported power margin, and the signaling overhead is not increased.
In order to implement the foregoing method, an embodiment of the present invention further provides a user equipment, as shown in fig. 6, including: an operation module, an acquisition module and a sending unit, wherein:
the operation module is used for calculating a power margin;
the obtaining module is used for obtaining the type information of the power margin;
and the sending module is used for sending the calculated power margin and the type information thereof together.
Further, still include a encapsulation module, wherein:
the encapsulating module is configured to encapsulate the type information of the power margin acquired by the acquiring module in a highest bit and/or a second highest bit of a Medium Access Control (MAC) layer control unit of the power margin, and then send the highest bit and/or the second highest bit to the sending module.
Further, still include a encapsulation module, wherein:
the encapsulating module is configured to encapsulate the type information of the power margin acquired by the acquiring module in a Logical Channel Identity (LCID) in a MAC layer protocol data unit subheader of a power margin MAC layer control unit, and then send the LCID to the sending module.
Further, the sending module is configured to send new uplink data on a subframe, and send a ue total power margin report at least once event-triggered since a last ue total power margin report on the subframe, or send the calculated power margin and type information thereof when a ue total power margin report on the subframe is first triggered and at least one Physical Uplink Shared Channel (PUSCH) sent by the ue on the subframe meets a preset condition.
Further, the encapsulation module is configured to load the index of the total power margin of the ue and the type information of the total power margin of the ue into a power margin MAC layer control unit and a MAC layer protocol data unit subheader thereof, and then send the power margin MAC layer control unit and the MAC layer protocol data unit subheader to the sending module. And the sending module is used for selecting a PUSCH meeting a preset condition to send the power margin MAC layer control unit and the MAC layer protocol data unit subhead thereof to a base station when the total power margin of the user equipment is reported on a subframe.
Further, the preset conditions include:
and the PUSCH is any PUSCH which has new uplink data transmission on the subframe and has enough uplink resources to report the total power margin of the user equipment according to the preset logic channel priority.
Further, the preset condition may include:
and the PUSCH is a PUSCH which has new uplink data transmission on the subframe, has enough uplink resources allocated to report the total power margin of the user equipment according to the preset logic channel priority and is positioned on a specific component carrier.
Further, the sending module may transmit new uplink data on a subframe, and in the subframe, for a certain component carrier, since a last component carrier power margin report, the component carrier power margin report of the certain component carrier has been triggered at least once by an event, or the component carrier power margin report of the certain component carrier on the subframe is triggered for the first time, and when at least one PUSCH sent on the subframe by the user equipment meets a preset condition, the calculated power margin and the type information thereof are sent out.
Further, the encapsulation module may carry the index of the component carrier power margin and the type information of the component carrier power margin in a power margin MAC layer control unit and a MAC layer protocol data unit subheader thereof, and then send the power margin MAC layer control unit and the MAC layer protocol data unit subheader to the sending module. And the sending module is used for selecting a PUSCH meeting a preset condition to send the power margin MAC layer control unit and the MAC layer protocol data unit subhead thereof to the base station when the power margin of a component carrier is reported on a subframe.
Further, the preset conditions include:
and the PUSCH is any PUSCH which has new uplink data transmission on the subframe and has enough uplink resources to report the power allowance of the component carrier according to the preset logic channel priority.
Further, the preset condition may include:
and the PUSCH is a PUSCH which has new uplink data transmission on the subframe, is distributed with uplink resources enough to report the power allowance of the component carrier according to the preset logic channel priority and is positioned on a specific component carrier.
Further, the sending module may send a new uplink data transmission on a certain component carrier on a certain subframe, and on the subframe, for the component carrier, since a last component carrier power margin report, a component carrier power margin report of the component carrier has been event-triggered at least once, or the component carrier power margin report of the component carrier on the subframe is triggered for the first time, and when uplink resources allocated by a PUSCH sent on the component carrier on the subframe are sufficient to report the component carrier power margin, the user equipment sends the calculated power margin and its type information.
Further, the encapsulation module may also carry the index of the component carrier power margin and the type information of the component carrier power margin in a power margin MAC layer control unit and its MAC layer protocol data unit subheader, and then send it to the sending module. The sending module is used for selecting a PUSCH on a component carrier corresponding to a component carrier power margin when the component carrier power margin is reported on a certain subframe, and sending the power margin MAC layer control unit and the MAC layer protocol data unit subhead thereof to a base station.
The invention is further illustrated below by means of three application examples.
Application example 1
Suppose an LTE-a system, operating in frequency division duplex mode, with 5 uplink component carriers U1, U2, U3, U4, U5 in the system.
In subframe i, a certain user equipment is scheduled by the base station to transmit PUSCH (i, 1) and PUSCH (i, 2) on uplink component carriers U1, U2, respectively.
Assuming that the user equipment reports the total power margin of the user equipment, reports the component carrier power margin of the uplink component carrier U1, and does not report the component carrier power margin of the uplink component carrier U2 on the subframe i.
The user equipment reports the power margin indexes of the total power margin of the user equipment and the power margin index of the component carrier power margin of the uplink component carrier U1 to the base station through 2 power margin MAC layer control units (8 bits respectively).
The highest bit of the power margin MAC layer control unit is 1, which means that the reported power margin is the total power margin of the user equipment, and the highest bit is 0, which means that the reported power margin is the component carrier power margin.
According to a certain rule, a power margin MAC layer control unit carrying the power margin of the component carrier of the uplink component carrier U1 transmits on a PUSCH (i, 1); the power margin MAC layer control element, which carries the total power margin of the user equipment, transmits on PUSCH (i, 2).
Application example two
Suppose an LTE-a system, operating in frequency division duplex mode, with 5 uplink component carriers U1, U2, U3, U4, U5 in the system.
In subframe i, a ue is scheduled by the base station to transmit a PUSCH (i, 1) on uplink component carrier U1, and is expected to transmit a PUCCH (i, 1) on uplink component carrier U1.
Assuming that in the subframe i, the ue reports the total power margin of the ue, and reports the power margin of the uplink component carrier U1.
The user equipment reports the power margin index of the total power margin of the user equipment to a base station through 1 MAC layer control unit of the total power margin of the user equipment; the logical channel identifier LCID of the MAC layer control unit with the total power margin of the user equipment is 11001, and is contained in the corresponding MAC layer protocol data unit subheader.
The user equipment reports the power margin index of the component carrier power margin of the uplink component carrier U1 to the base station through a 1 component carrier power margin MAC layer control unit; the logical channel identifier LCID of the component carrier power margin MAC layer control unit is 11010 which is contained in the corresponding MAC layer protocol data unit subhead.
The user equipment total power margin MAC layer control unit and the component carrier power margin MAC layer control unit are both sent on PUSCH (i, 1).
Application example three
Suppose an LTE-a system, operating in frequency division duplex mode, with 5 uplink component carriers U1, U2, U3, U4, U5 in the system.
In subframe i, a user equipment is scheduled by the base station to transmit PUSCH (i, 1) and PUSCH (i, 2) on uplink component carriers U1, U2, respectively, and is expected to transmit one PUCCH (i, 1) on uplink component carrier U1.
Assuming that in the subframe i, the ue reports the total power margin of the ue, and reports the power margins of uplink component carriers U1 and U2.
The user equipment reports the power margin indexes of the total power margin of the user equipment to the base station through 1 power margin MAC layer control unit, wherein the highest bit and the second highest bit of the power margin MAC layer control unit are '11' (or '10');
the user equipment reports the power margin indexes of the component carrier power margins of the uplink component carrier U1 to the base station through 2 power margin MAC layer control units, wherein the highest bits and the second highest bits of the 2 power margin MAC layer control units are '00' and '01' respectively;
the user equipment reports the power margin indexes of the component carrier power margins of the uplink component carrier U2 to the base station through 1 power margin MAC layer control unit, and the highest bit and the second highest bit of the power margin MAC layer control unit are '00'.
According to a certain rule, a power margin MAC layer control unit carrying the power margin of the component carrier of the uplink component carrier U1 transmits on a PUSCH (i, 1); a power margin MAC layer control unit carrying the power margin of the component carrier of the uplink component carrier U2 transmits on a PUSCH (i, 2); the power margin MAC layer control element, which carries the total power margin of the user equipment, transmits on PUSCH (i, 2).
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (22)

1. A method for reporting a power margin, comprising:
when the user equipment reports the power allowance, the user equipment also sends the type information of the power allowance to a base station; the UE carries the type information of the power margin by the highest bit and/or the second highest bit of a MAC (media access control) layer control unit with the power margin, or carries the type information of the power margin by a Logic Channel Identifier (LCID) in a sub-header of an MAC layer protocol data unit of the MAC layer control unit with the power margin;
the power margin includes a user equipment total power margin and a component carrier power margin.
2. The method of claim 1, further comprising:
the UE transmits new uplink data on a subframe, and on the subframe, the UE total power margin report is triggered at least once by an event since the last UE total power margin report, or the UE total power margin report of the UE is triggered for the first time on the subframe, and at least one Physical Uplink Shared Channel (PUSCH) sent by the UE on the subframe meets a preset condition, and the UE reports the UE total power margin.
3. The method of claim 1, further comprising:
when the user equipment reports the total power allowance of the user equipment on a subframe, the index of the total power allowance of the user equipment and the type information of the total power allowance of the user equipment are loaded in a power allowance MAC layer control unit and an MAC layer protocol data unit subhead thereof, and a PUSCH which meets the preset condition is selected to send the power allowance MAC layer control unit and the MAC layer protocol data unit subhead thereof to a base station.
4. A method according to claim 2 or 3, wherein the predetermined conditions include:
and the PUSCH is any PUSCH which has new uplink data transmission on the subframe and has enough uplink resources to report the total power margin of the user equipment according to the preset logic channel priority.
5. A method according to claim 2 or 3, wherein the predetermined conditions include:
and the PUSCH is a PUSCH which has new uplink data transmission on the subframe, has enough uplink resources allocated to report the total power margin of the user equipment according to the preset logic channel priority and is positioned on a specific component carrier.
6. The method of claim 1, further comprising:
the UE transmits new uplink data on a subframe, and for a certain component carrier on the subframe, the component carrier power margin report of the certain component carrier is triggered at least once by an event since the last component carrier power margin report, or the component carrier power margin report of the certain component carrier on the subframe is triggered for the first time, and at least one PUSCH (physical uplink shared channel) sent by the UE on the subframe meets a preset condition, and the UE reports the total power margin of the UE.
7. The method of claim 1, further comprising:
when the user equipment reports a component carrier power allowance on a subframe, the index of the component carrier power allowance and the type information of the component carrier power allowance are loaded in a power allowance MAC layer control unit and an MAC layer protocol data unit subhead thereof, and a PUSCH meeting the preset condition is selected to send the power allowance MAC layer control unit and the MAC layer protocol data unit subhead thereof to a base station.
8. The method according to claim 6 or 7, wherein the predetermined conditions include:
and the PUSCH is any PUSCH which has new uplink data transmission on the subframe and has enough uplink resources to report the power allowance of the component carrier according to the preset logic channel priority.
9. The method according to claim 6 or 7, wherein the predetermined conditions include:
and the PUSCH is a PUSCH which has new uplink data transmission on the subframe, is distributed with uplink resources enough to report the power allowance of the component carrier according to the preset logic channel priority and is positioned on a specific component carrier.
10. The method of claim 1, further comprising:
if the UE transmits new uplink data on a component carrier on a subframe, and the UE has been triggered at least once by an event since the last CC power margin report on the subframe, or has been triggered for the first time on the subframe, and the UE reports the CC power margin if uplink resources allocated to PUSCH transmitted on the CC on the subframe are sufficient for reporting the CC power margin, the UE reports the CC power margin.
11. The method of claim 1, further comprising:
when the user equipment reports a component carrier power allowance on a subframe, the index of the component carrier power allowance and the type information of the component carrier power allowance are loaded in a power allowance MAC layer control unit and an MAC layer protocol data unit subhead thereof, and a PUSCH on a component carrier corresponding to the component carrier power allowance is selected to send the power allowance MAC layer control unit and the MAC layer protocol data unit subhead thereof to a base station.
12. A user equipment is used for reporting power margin to a base station, wherein the power margin comprises a total power margin of the user equipment and a component carrier power margin, the user equipment is characterized by comprising an operation module, an acquisition module and a sending module, and the operation module comprises:
the operation module is used for calculating a power margin;
the obtaining module is used for obtaining the type information of the power margin;
the sending module is used for sending the calculated power margin and the type information thereof out together;
the user equipment further comprises a packaging module, configured to package, in the highest bit and/or the second highest bit of a MAC layer control unit for MAC medium access control with power margin, the type information of the power margin acquired by the acquiring module, and then send the type information to the sending module, or package, in the subheader of a MAC layer protocol data unit of the MAC layer control unit for power margin, the type information of the power margin acquired by the acquiring module, a logical channel identifier LCID, and then send the logical channel identifier LCID to the sending module.
13. The user device of claim 12, wherein:
the sending module is configured to send new uplink data on a subframe, and send a total power margin report of the user equipment at least once triggered by an event since a last total power margin report of the user equipment on the subframe, or send the calculated power margin and type information thereof when at least one PUSCH (physical uplink shared channel) sent by the user equipment on the subframe meets a preset condition.
14. The user device of claim 12, wherein:
the packaging module is used for loading the index of the total power margin of the user equipment and the type information of the total power margin of the user equipment into a power margin MAC layer control unit and an MAC layer protocol data unit subhead thereof and then sending the power margin MAC layer control unit and the MAC layer protocol data unit subhead to the sending module;
and the sending module is used for selecting a PUSCH meeting a preset condition to send the power margin MAC layer control unit and the MAC layer protocol data unit subhead thereof to a base station when the total power margin of the user equipment is reported on a subframe.
15. The user equipment according to claim 13 or 14, wherein the preset conditions comprise:
and the PUSCH is any PUSCH which has new uplink data transmission on the subframe and has enough uplink resources to report the total power margin of the user equipment according to the preset logic channel priority.
16. The user equipment according to claim 13 or 14, wherein the preset conditions comprise:
and the PUSCH is a PUSCH which has new uplink data transmission on the subframe, has enough uplink resources allocated to report the total power margin of the user equipment according to the preset logic channel priority and is positioned on a specific component carrier.
17. The user device of claim 12, wherein:
the sending module is configured to transmit new uplink data on a subframe, and in the subframe, for a certain component carrier, since a last component carrier power margin report is performed, the component carrier power margin report of the certain component carrier has been triggered at least once by an event, or the component carrier power margin report of the certain component carrier on the subframe is triggered for the first time, and when at least one PUSCH sent by the user equipment on the subframe meets a preset condition, the calculated power margin and type information thereof are sent out.
18. The user device of claim 12, wherein:
the packaging module is used for loading the index of the power allowance of the component carrier and the type information of the power allowance of the component carrier into a power allowance MAC layer control unit and a MAC layer protocol data unit subhead thereof and then sending the power allowance MAC layer control unit and the MAC layer protocol data unit subhead to the sending module;
and the sending module is used for selecting a PUSCH meeting a preset condition to send the power margin MAC layer control unit and the MAC layer protocol data unit subhead thereof to the base station when the power margin of a component carrier is reported on a subframe.
19. The user equipment according to claim 17 or 18, wherein the preset conditions comprise:
and the PUSCH is any PUSCH which has new uplink data transmission on the subframe and has enough uplink resources to report the power allowance of the component carrier according to the preset logic channel priority.
20. The user equipment according to claim 17 or 18, wherein the preset conditions comprise:
and the PUSCH is a PUSCH which has new uplink data transmission on the subframe, is distributed with uplink resources enough to report the power allowance of the component carrier according to the preset logic channel priority and is positioned on a specific component carrier.
21. The user equipment of any of claim 12, wherein:
the sending module is configured to transmit new uplink data on a certain component carrier on a subframe, and on the subframe, for the component carrier, a component carrier power margin report of the component carrier is triggered at least once by an event since the last component carrier power margin report, or the component carrier power margin report of the component carrier is triggered for the first time on the subframe, and the user equipment sends the calculated power margin and type information thereof when uplink resources allocated to a PUSCH sent on the component carrier on the subframe are sufficient to report the component carrier power margin.
22. The user equipment of any of claim 12, wherein:
the packaging module is used for loading the index of the power allowance of the component carrier and the type information of the power allowance of the component carrier into a power allowance MAC layer control unit and a MAC layer protocol data unit subhead thereof and then sending the power allowance MAC layer control unit and the MAC layer protocol data unit subhead to the sending module;
the sending module is used for selecting a PUSCH on a component carrier corresponding to a component carrier power margin when the component carrier power margin is reported on a certain subframe, and sending the power margin MAC layer control unit and the MAC layer protocol data unit subhead thereof to a base station.
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