CN101931992A - A method and terminal for realizing power headroom reporting - Google Patents

Abstract

The invention discloses a method and a terminal for realizing power headroom reporting. In the present invention, the UE supporting the carrier aggregation technology determines one or more PHs for the allocated component carriers, and selects at least one uplink component carrier for PHR transmission. According to the solution provided by the present invention, a clear description is given for the specific implementation of PHR in the case of multi-carriers. Combining PHR in carrier aggregation technology can promote the development of carrier aggregation technology and promote the wide application of multi-carrier technology. Due to the support of PHR in the case of multiple carriers, the UE can send PHR for each component carrier, so that the eNB can learn more information about each component carrier on the UE side, which is convenient for the eNB and even the core network to control the UE, which is conducive to improving system performance. In addition, the solution of the present invention provides flexible and diverse implementation modes, which can be properly selected according to actual application conditions, thereby enhancing the adaptability of the overall solution.

Description

A method and terminal for realizing power headroom reporting

technical field

The present invention relates to the communication field, in particular to a method and a terminal for realizing power headroom reporting.

Background technique

The Evolved Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial Radio Access Network) of the third-generation mobile communication Long Term Evolution (LTE, Long Term Evolution) system is composed of base stations (eNBs), and its radio interface media access control The (MAC, MediaAccess Control) protocol layer has a power headroom reporting (PHR, Power Headroom Reporting) functional entity.

PHR means that the user terminal (UE, User Equipment) reports the UE's nominal maximum transmit power and estimated uplink shared channel (UL-SCH, UpLink Share Channel) to the eNB in the form of a media access control element (MAC CE, MAC Control Element). ) The difference between the transmit power.

There are mainly the following situations that trigger PHR:

1. The PHR prohibition timer (prohibitPHR-Timer) times out, and the change in path loss is greater than the set value (starting from the last PHR);

2. PHR periodic timer (periodicPHR-Timer) timeout;

3. Configuration or reconfiguration of PHR functional entities;

After the PHR is triggered, the UE sends the PHR when there are uplink transmission resources supporting the PHR.

The MAC CE format of the PHR is shown in Figure 1. The power headroom (PH, Power Headroom) bit field indicates the power headroom in the PHR. The length of the PH bit field is 6 bits. In addition, there are two reserved R bits bit, the default value of this reserved bit in the prior art is 0.

In order to meet the growing demand for large bandwidth and high-speed mobile access, the Third Generation Partnership Project (3GPP, Third Generation Partnership Projects) launched the LTE-Advanced (Long-Term Evolution Advanced) standard. LTE-Advanced adopts a series of new technologies on the basis of LTE to expand the frequency domain and air domain to achieve the purpose of improving spectrum utilization and increasing system capacity. Among them, the carrier aggregation (CC, Component Carrier) technology can aggregate two or more component carriers to support a wider frequency band, such as spectrum aggregation up to 100MHz. The UE can receive or send data on one or more component carriers at the same time, and can be configured to aggregate different numbers of component carriers with different bandwidths in the downlink/uplink.

In the case of multiple carriers, how to schedule uplink transmission resources supporting PHR in multiple component carriers, and how to send the PH of each component carrier when the PHR is triggered on the component carriers, there is no specific implementation given in the prior art. Therefore, there is an urgent need to provide an implementation scheme of how to schedule uplink transmission resources for PHR transmission in the case of multiple carriers.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method and terminal for realizing power headroom reporting, so as to realize PHR in the case of multiple carriers.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A method for realizing power headroom reporting, where a user terminal UE supports carrier aggregation technology, the method includes: the UE determines one or more power headroom PHs for allocated component carriers, and selects at least one component carrier in the uplink Send the power headroom report PHR on the upper side.

The UE determines one or more PHs for the allocated component carriers, specifically: for the component carriers allocated to the UE, the UE determines one PH for one component carrier; or, the UE determines one PH for multiple component carriers; or, The UE not only determines one PH for one component carrier, but also determines one PH for multiple component carriers.

For the component carriers allocated to the UE, the UE determines one PH for one component carrier, specifically: the UE determines one PH for each of the allocated component carriers; or, for the component carriers allocated to the UE, the UE determines one PH for each component carrier Determining one PH for multiple component carriers is specifically: the UE determines one PH for all the allocated component carriers; or, the multiple component carriers for determining one PH are multiple components allocated to the UE and continuous in the frequency domain carrier; or, the multiple component carriers for determining one PH are multiple component carriers allocated to the UE and belonging to the same transmit filter bandwidth of the UE.

The PH corresponds to only one component carrier, and the determined PH is: the difference between the average nominal maximum transmit power of each component carrier of the UE and the UL-SCH transmit power estimated by the UE on the component carrier ;

Or, the PH only corresponds to one component carrier, and the determined PH is: the difference between the nominal maximum transmit power of the UE and the UL-SCH transmit power estimated by the UE on the component carrier;

Alternatively, the PH corresponds to multiple component carriers, and the determined PH is:

The difference between the UE's nominal maximum transmit power and the sum of the UE's estimated UL-SCH transmit power on each component carrier corresponding to the PH; or,

The difference between the UE's nominal maximum transmit power and the arithmetic mean of the sum of the UE's estimated UL-SCH transmit power on each component carrier corresponding to the PH; or,

The difference between the UE's nominal maximum transmit power and the UE's estimated UL-SCH transmit power on any one of the component carriers corresponding to the PH; or,

The average value of the difference between the UE's nominal maximum transmit power and the sum of the UE's estimated UL-SCH transmit power on each component carrier corresponding to the PH.

The selecting to transmit PHR on at least one component carrier of the uplink is specifically: selecting to transmit PH on at least one component carrier with uplink transmission resources supporting PHR, and the PHR corresponding to the transmitted PH includes at least the triggered PHR.

The component carrier for sending the PH is: any component carrier supported by the UE; or a PHR component carrier configured by the base station eNB, and the PHR component carrier is a component carrier for the UE to perform PHR transmission; further, the PHR component carrier The configuration of the eNB is realized by sending dedicated signaling to the UE.

The selecting to perform PHR transmission on at least one component carrier with uplink transmission resources supporting PHR includes: when there are uplink transmission resources supporting PHR on the component carrier that triggers PHR, selecting at least one of the component carriers to perform PHR transmission; or , when at least one component carrier has an uplink transmission resource supporting PHR, at least one of the component carriers is selected for PHR transmission.

When there are uplink transmission resources supporting PHR on the component carrier, select the component carrier for PHR transmission, and the PHR transmission includes: setting the component carrier index corresponding to the sent PH, and sending the component carrier index and the component carrier index on the component carrier. the above pH; and/or,

When there are uplink transmission resources supporting PHR on the component carrier, selecting the component carrier to send the PHR, the selecting the component carrier to send the PHR includes: sending one PH on one component carrier; or, sending multiple PH on one component carrier A combined PH obtained by organizing multiple PHs according to a set rule; or, sending a PH separately through at least one component carrier, and sending a combined PH obtained by organizing multiple PHs according to a set rule through at least one component carrier, the component carrier on which one PH is transmitted is different from the component carrier on which a combined PH is transmitted; and/or,

When selecting a component carrier for PHR transmission, when selecting a component carrier to send multiple PHs, the sending PH includes: organizing the PHs according to the set rules to obtain a combined PH, and sending the PH on the component carrier Combined pH.

The setting rule: pre-configured to the UE by the eNB; or provided to the UE by sending a dedicated signaling to the UE through the eNB; and/or, the setting rule is: a set arrangement rule of each PH, or a component carrier index and the arrangement rule of the PH of the corresponding component carrier, or the arrangement rule of the PHR identifier of the component carrier and the PH of the corresponding component carrier.

The value of the logical channel identifier LCID used to identify the PHR in the multi-carrier situation is: a newly set value that is not within the value range of the existing LCID; or, a value selected from the existing LCID reserved value interval ; Or, the existing LCID value used to identify the PHR.

When using the existing LCID value used to identify the PHR to identify the PHR in the multi-carrier situation, before sending the PHR, it further includes: the eNB notifies the UE that the current PHR is in the multi-carrier situation; or, the UE according to its own capability information It is determined that the PHR performed by the UE is the PHR in the case of multiple carriers, and the eNB determines that the PHR performed by the UE is the PHR in the case of multiple carriers through the capability information of the UE.

A terminal for realizing power headroom reporting, the terminal supports carrier aggregation technology, the terminal includes: a determining unit and a reporting unit, wherein the determining unit is used to determine one or more PHs for component carriers allocated to UE; The reporting unit is used to select at least one uplink component carrier for PHR transmission.

The reporting unit is specifically configured to: select to send PH on at least one component carrier with uplink transmission resources supporting PHR, and the PHR corresponding to the sent PH includes at least a triggered PHR.

According to the solution provided by the present invention, a clear description is given for the specific implementation of PHR in the case of multi-carriers. Combining PHR in carrier aggregation technology can promote the development of carrier aggregation technology and promote the wide application of multi-carrier technology. Due to the support of PHR in the case of multiple carriers, the UE can send PHR for each component carrier, so that the eNB can learn more information about each component carrier on the UE side, which is convenient for the eNB and even the core network to control the UE, which is conducive to improving system performance.

In addition, the solution of the present invention provides flexible and diverse implementation modes, which can be properly selected according to actual application conditions, thereby enhancing the adaptability of the overall solution.

Description of drawings

Figure 1 is a schematic diagram of the MAC CE format of the existing PHR;

Fig. 2 is the MAC CE format schematic diagram of PHR in the specific example two of the present invention;

Fig. 3 is the MAC CE format schematic diagram of PHR in the concrete example 3 of the present invention;

Fig. 4 is the MAC CE format schematic diagram of PHR in the specific example 4 of the present invention;

Fig. 5 is a schematic diagram of the MAC CE format of the PHR in the fifth embodiment of the present invention;

Fig. 6 is a schematic diagram of the MAC CE format of the PHR in the sixth embodiment of the present invention;

7 is a schematic diagram of the MAC CE format of the PHR in Example 7 of the present invention;

8 is a schematic diagram of the MAC CE format of the PHR in the eighth embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a terminal implementing PHR in the present invention.

Detailed ways

In the present invention, the UE determines one or more PHs for the allocated component carriers, and selects at least one uplink component carrier for PHR transmission.

The UE determining one or more PHs for the allocated component carriers described above may be that the UE determines one or more PHs for at least one allocated component carrier, specifically implemented as:

When only one component carrier is allocated to the UE, the UE determines a PH for the component carrier;

When multiple component carriers are allocated to the UE, for multiple component carriers allocated to the UE, the UE determines a PH for one of the component carriers. At this time, the PH only corresponds to one component carrier, and the UE can determine one or more corresponding A PH of a component carrier; or, determine a PH for multiple component carriers, at this time, the PH corresponds to multiple component carriers, and any component carrier in the multiple component carriers also corresponds to the PH, and the UE can determine One or more PHs corresponding to multiple component carriers, and the multiple component carriers corresponding to each PH may be partly the same or completely different; or, one PH is determined for one component carrier, and one PH is determined for multiple component carriers, The UE may determine one or more PHs corresponding to only one component carrier, and one or more PHs corresponding to multiple component carriers, and the multiple component carriers corresponding to each PH may be partly the same or completely different. The UE may determine one PH for each allocated component carrier, that is, the UE determines one PH for each allocated component carrier; or one PH may be determined for all allocated component carriers.

Preferably, if multiple component carriers allocated to the UE are continuous in the frequency domain, the UE may determine a PH for the allocated multiple component carriers continuous in the frequency domain; Multiple component carriers within the same transmit filter bandwidth of the UE determine a PH.

When determining the PH, it may specifically include determining the PH by reading the physical layer. The number of component carriers corresponding to the PH is different, and its specific implementation will also be different, which will be described separately below.

When the PH corresponds to only one component carrier, the determined PH may be: the difference between the average nominal maximum transmit power of each component carrier of the UE and the UL-SCH transmit power estimated by the UE on the component carrier, where, The average nominal maximum transmit power of each component carrier of the UE may be the UE's nominal maximum transmit power divided by the number of component carriers allocated to the UE; or, the UE's nominal maximum transmit power and the UE's estimated maximum transmit power on the component carrier The difference between the transmit power of the uplink shared channel UL-SCH.

When the PH corresponds to multiple component carriers, the determined PH may be: the difference between the nominal maximum transmit power of the UE and the sum of the UL-SCH transmit power estimated by the UE on each component carrier corresponding to the PH; or, The difference between the UE's nominal maximum transmit power and the arithmetic mean of the UE's estimated UL-SCH transmit power sum on each component carrier corresponding to the PH; or, the UE's nominal maximum transmit power and the UE's corresponding PH The difference between the estimated UL-SCH transmit power on any one of the component carriers of the PH; or, the difference between the UE’s nominal maximum transmit power and the UE’s estimated UL-SCH transmit power on each component carrier corresponding to the PH The average of the differences between and .

When the multiple component carriers corresponding to the PH are all component carriers allocated to the UE, the determined PH may be: the difference between the nominal maximum transmit power of the UE and the sum of the UL-SCH transmit power estimated by the UE on each component carrier difference; or, the difference between the UE’s nominal maximum transmit power and the arithmetic mean of the UE’s estimated UL-SCH transmit power on each component carrier; or, the UE’s nominal maximum transmit power and the UE’s The difference between the estimated UL-SCH transmit power on any component carrier; or, the average of the difference between the UE's nominal maximum transmit power and the sum of the UE's estimated UL-SCH transmit power on each component carrier value, that is, the difference between the nominal maximum transmit power of the UE and the sum of the estimated UL-SCH transmit power of the UE on each component carrier divided by the number of component carriers allocated to the UE.

Selecting to transmit PHR on at least one uplink component carrier refers to: selecting to transmit PH on at least one component carrier with uplink transmission resources supporting PHR, and the PHR corresponding to the transmitted PH includes at least the triggered PHR. Since the PHR is triggered on the component carrier, the UE will send a PH on the component carrier that has uplink transmission resources that support PHR, and the sent PH corresponds to one or more component carriers. In this way, the sent PH corresponds to the PH The PHR of the corresponding component carrier. Therefore, in the implementation solution of the present invention, the PHR corresponding to the sent PH includes at least the triggered PHR. If a PHR is triggered on a component carrier, the component carrier may also be referred to as a PHR-triggered component carrier.

The component carrier for sending PH can be any component carrier supported by the UE, that is, any component carrier allocated to the UE; it can also be the PHR component carrier configured by the eNB, that is, the component carrier configured by the eNB in the component carrier allocated to the UE. The component carrier sent by the PHR, the configuration of the PHR component carrier can be realized by sending dedicated signaling from the eNB to the UE.

Selecting to transmit PHR on at least one component carrier with uplink transmission resources supporting PHR, the specific implementation includes:

It may be that at least one component carrier is selected for PHR transmission only when there is an uplink transmission resource supporting PHR on the component carrier that triggers PHR. The PH sent on the component carrier may correspond to a component carrier. At this time, the transmitted PH corresponds to the The PHR is the triggered PHR; the PH sent on the component carrier can also correspond to multiple component carriers. At this time, the PHR corresponding to the sent PH includes at least the triggered PHR, and the PHR corresponding to the sent PH may be the triggered PHR. The PHR corresponding to the PH may not only include the triggered PHR, but also include the PHRs of other component carriers in the component carriers corresponding to the PH except the component carrier that triggers the PHR.

It may also be that at least one component carrier is selected for PHR transmission as long as there is an uplink transmission resource supporting PHR on at least one component carrier, or even all component carriers with uplink transmission resources supporting PHR are selected for PHR transmission. , whether the UE determines a PH for a component carrier or determines a PH for multiple component carriers, the component carrier for PHR transmission may be the component carrier corresponding to the PH, or a component different from the component carrier corresponding to the PH Carrier, as long as there are uplink transmission resources supporting PHR on the corresponding component carrier. At this time, the PHR corresponding to the sent PH includes at least the triggered PHR.

According to the above description, it can be seen that at least one component carrier is selected for PHR transmission only when there are uplink transmission resources supporting PHR on the component carrier that triggers PHR. In this case, only a single PH needs to be sent on a component carrier. Since the PH may be a PH corresponding to multiple component carriers, the PH may be sent on multiple component carriers. As long as there is an uplink transmission resource supporting PHR on at least one component carrier, at least one of the component carriers is selected for PHR transmission. There is a certain relationship, as long as each component carrier with uplink transmission resources supporting PHR is fully utilized to transmit PHR, therefore, the PH transmitted on one component carrier is no longer limited to a single PH, but can be multiple PHs.

As long as there is a component carrier that supports PHR uplink transmission resources, the PHR is sent. Since there is no fixed correspondence between the component carrier that sends the PH and the component carrier corresponding to the PH at this time, even if a single component carrier is sent on a component carrier The PH corresponding to the PH also needs to give the component carrier corresponding to the PH, which can be identified by setting the component carrier index. How to set the component carrier index has been determined, and both UE and eNB know it. If the UE determines a PH for a component carrier, when sending the PH, the index of the component carrier corresponding to the PH can be set as the corresponding component carrier index, and the index of the component carrier corresponding to the PH and the PH can be sent on the component carrier; If the UE determines a PH for multiple component carriers, when sending the PH, it also needs to set the component carrier index corresponding to the PH, and then send the set component carrier index and the PH on the component carrier. At this time, the component carrier index can be is the index of one of the component carriers corresponding to the PH, and may also be a value that has nothing to do with the indices of the component carriers corresponding to the PH.

When multiple PHs are sent on a component carrier, each PH can be organized according to a set rule to obtain a combined PH, and then the combined PH is sent on the component carrier. The setting rules are mainly used to determine the organization form when multiple PHs are sent on a component carrier, that is, how to organize multiple PHs to obtain a combined PH, which can be the set arrangement rules of each PH, or component carrier indexes and corresponding The arrangement rule of the PH of the component carrier, or the arrangement rule of the PHR identifier of the component carrier and the PH of the corresponding component carrier, and so on. The setting rules can be pre-configured to the UE by the eNB, or can be provided to the UE by sending a dedicated signaling to the UE from the eNB. The combined PH obtained by organizing the PHs according to the set rules is sent on one component carrier, which can save the control overhead of MAC data.

As long as there are uplink transmission resources supporting PHR on at least one component carrier, at least one component carrier is selected for PHR transmission. In this case, when multiple PHs need to be sent, one or more individual PHs can be distributed to some components Each component carrier in this part of component carriers only transmits a single PH; or, through at least one component carrier, a combined PH obtained by organizing multiple PHs according to the set rules is sent, that is, multiple PHs are organized according to the set rules. The combined PH obtained after organizing according to the set rules is sent collectively; or, a PH is sent separately through at least one component carrier, and a combined PH obtained by organizing multiple PHs according to the set rules is sent through at least one component carrier, and a The component carrier of the PH is different from the component carrier of the combined PH, that is, only a single PH is transmitted on each component carrier in a part of the component carriers, and multiple PHs are transmitted on each component carrier in another part of the component carriers according to Combined PH obtained after setting rules for organization. The sending form of the PH on the component carrier can be flexibly selected, as long as all the triggered PHRs can be guaranteed to be completed.

In the prior art, the MAC header includes a Logical Channel Identification (LCID, Logical Channel ID) field, and the LCID field is used to identify the logical channel corresponding to the MAC Service Data Unit (SDU, Service Data Unit), or the type of MAC CE, or Padding bits, the padding bits are used for padding of MAC Protocol Data Unit (PDU, Protocol Data Unit). The length of LCID is 5 bits, and the binary value ranges from 0 to 11111. Wherein, the reserved value range of LCID is represented as [01011-11001] in binary. In particular, when the value of the LCID is binary number 11010, the MAC CE is identified as a PHR.

Like this, in the specific realization of the scheme of the present invention, in MAC PDU, can mark MAC CE as the PHR under the multi-carrier situation by introducing new value for LCID, this value can be from the existing LCID reserved value range Select; it can also be newly set, that is, set to other values that are not within the range of existing LCID values. In addition, the existing LCID value used to identify the MAC CE as a PHR may still be used, but the MAC CE identified by this value is a PHR in the case of multiple carriers. In this case, the eNB needs to pass the radio network controller (RNC, Radio Network Controller) message informs the UE that the current PHR is multi-carrier; or, the UE determines that the PHR performed by the UE is the PHR under the multi-carrier situation according to its own capability information, and the eNB determines that the PHR performed by the corresponding UE is based on the UE capability information. For the PHR in the case of multiple carriers, the capability information of the UE can be provided to the eNB when the UE establishes a connection with the eNB.

In order to make the specific implementation of the solution of the present invention clearer, several specific examples are given below for further description. In the following specific examples, both UE and eNB support carrier aggregation technology, adopt frequency division duplex (FDD, Frequency Division Duplex) mode, and support a maximum uplink bandwidth of 100MHz, which is the maximum uplink supported by LTE Release 8 standard systems 5 times the bandwidth of the road.

Specific example one

The UE works on 4 component carriers, that is, the UE is assigned to 4 component carriers, which are respectively component carrier 0, component carrier 1, component carrier 2 and component carrier 3. The PHR is triggered on the component carrier 0, the component carrier 1, the component carrier 2 and the component carrier 3, and each component carrier has an uplink transmission resource supporting the PHR.

If the UE determines a PH for each allocated component carrier, that is, the PH corresponds to only one component carrier, then the determined PHs are: PH _i =P _max /4-P _i , where i takes a value of 0, 1, 2, 3; PH _i is the PH determined for component carrier i; P _max is the UE’s nominal maximum transmit power, which is equally distributed among the four component carriers. Correspondingly, P _max /4 is the The average nominal maximum transmit power on the carrier; P _i is the UL-SCH transmit power estimated by the UE on the component carrier i. In addition, each determined PH may also be: PH _i =P _max -P _i .

When the UE transmits PHR, each PH can be transmitted through the component carrier corresponding to the PH, that is, component carrier 0 is selected to transmit PH ₀ , component carrier 1 to transmit PH ₁ , component carrier 2 to transmit PH ₂ , and component carrier 3 to transmit PH ₃ ; A component carrier, such as component carrier 3, sends the combined PH obtained by organizing each PH according to the set rules; component carrier 3 can also be selected to send the combined PH obtained by organizing PH ₁ and PH ₂ according to the set rules, and select Component carrier 0 sends PH ₀ , and component carrier 1 sends PH ₃ ; component carrier 0 can also be selected to send the combined PH obtained by organizing PH ₁ , PH ₂ and PH ₃ according to the set rules, etc., which will not be repeated here One example.

If the PHR of the UE determines a PH for the allocated 4 component carriers, that is, the PH only corresponds to 4 component carriers, then the determined PH is: PH=P _max -(P ₀ +P ₁ +P ₂ + P ₃ )=P _max -P ₀ -P ₁ -P ₂ -P ₃ ; or, PH=P _max -(P ₀ +P ₁ +P ₂ +P ₃ )/4; or, PH=P _max -rand (P ₀ , P ₁ , P ₂ , P ₃ ); or, pH=(P _max -(P ₀ +P ₁ +P ₂ +P ₃ ))/4=(P _max -P ₀ -P ₁ -P ₂ -P ₃ )/4. Among them, P _max is the nominal maximum transmission power of the UE; P ₀ , P ₁ , P ₂ , and P ₃ are the UL-SCH transmission estimated by the UE on component carrier 0, component carrier 1, component carrier 2, and component carrier 3, respectively. Power; rand(P ₀ , P ₁ , P ₂ , P ₃ ) means to choose one of P ₀ , P ₁ , P ₂ , and P ₃ arbitrarily.

When UE transmits PHR, it can select one component carrier, such as component carrier 1 to send PH; it can also select multiple component carriers, such as component carrier 0 and component carrier 2 to send PH, and so on.

Specific example two

The UE works on 4 component carriers, that is, the UE is assigned to 4 component carriers, which are respectively component carrier 0, component carrier 1, component carrier 2 and component carrier 3. PHR is triggered on component carrier 1, and PHR is not triggered on other component carriers.

At time t1, there are uplink transmission resources supporting PHR on component carrier 2 and component carrier 3. Since the UE only selects at least one component carrier for PHR transmission when there is an uplink transmission resource supporting PHR on the component carrier corresponding to PH, so , at this time, the component carrier will not be selected to transmit the PH corresponding to component carrier 1.

At time t ₂ , t ₂ >t ₁ , there is an uplink resource supporting PHR on component carrier 1. At this time, UE determines PH for component carrier 1, that is, PH ₁ , and selects component carrier 1 to send the PH corresponding to component carrier 1, that is, PH _1. The format of the MAC CE in this example is shown in Figure 2. Since the UE only determines PH ₁ for component carrier 1, and the component carrier required to send PH ₁ is component carrier 1, so the PH sent on component carrier 1 must correspond to component carrier 1, so no other information is needed at this time to identify the component carrier corresponding to the PH ₁ sent on the component carrier 1. The current PHR is the PHR on component carrier 1, which is the same as the triggered PHR.

Specific example three

The UE works on 8 component carriers, that is, the UE is allocated to 8 component carriers, which are respectively component carrier 0 to component carrier 7 . PHR is triggered on component carrier 0, and PHR is not triggered on other component carriers.

At the current moment, there are only uplink transmission resources supporting PHR on component carrier 0. As long as there are uplink transmission resources supporting PHR on at least one component carrier, the UE will select at least one component carrier for PHR transmission. Therefore, at this time, UE A PH is determined for component carrier 0, namely PH ₀ , and component carrier 0 is selected to send the PH corresponding to component carrier 0 , namely PH ₀ . The format of the MAC CE in this example is shown in FIG. 3 . Since there is no fixed correspondence between the component carrier that sends the PH and the component carrier corresponding to the PH, it is necessary to identify the component carrier corresponding to the transmitted PH through auxiliary information, such as component carrier index, to indicate the component carrier corresponding to the current PHR Carrier, the component carrier index in this example is 3 bits, the binary 000 shown in FIG. 3 is used to represent the component carrier index 0. The current PHR is the PHR on component carrier 0, which is the same as the triggered PHR.

In this example, in the MAC PDU, a new value is introduced for the LCID to identify the MAC CE as the PHR in the case of multiple carriers, and the value is selected from the existing LCID reserved value range.

Concrete example four

The UE works on 5 component carriers, that is, the UE is allocated to 5 component carriers, namely component carrier 0 to component carrier 4, wherein component carrier 1 and component carrier 4 are adjacent in the frequency domain.

In view of the adjacent component carrier 1 and component carrier 4 in the frequency domain, the UE will determine a PH for component carrier 1 and component carrier 4 in this example, and the PH has only one corresponding component carrier index, which can be 1 or 4 , can also be other natural numbers unrelated to 0 to 4, which is 1 in this example.

The component carrier 0 and the component carrier 3 are the PHR component carriers configured by the eNB, allowing the component carrier 0 and/or the component carrier 3 to transmit the PH corresponding to other component carriers. The configuration of the PHR component carrier can be realized by sending dedicated signaling from the eNB to the UE.

The PHR is triggered on component carrier 1, the PHR is also triggered on component carrier 2, and the PHR is not triggered on other component carriers. At the current moment, there are uplink transmission resources supporting PHR on component carrier 0 and component carrier 3. Since component carrier 0 and/or component carrier 3 are allowed to transmit PH corresponding to other component carriers, at this time, UE for component carrier 1 and component carrier The component carrier 4 determines the PH, that is, PH ₁ , selects the component carrier 0 to send the PH corresponding to the component carrier 1, that is, PH ₁ , the UE determines the PH for the component carrier 2, that is, PH ₂ , selects the component carrier 3 to send the PH corresponding to the component carrier 2, Namely PH ₂ , the format of the MAC CE in this example is shown in Figure 4, where the two-digit binary component carrier index 1 indicates that PH ₁ corresponds to component carrier 1 and component carrier 4, and the component carrier index 2 indicates that PH ₂ only corresponds to For component carrier 2, the current PHR corresponds to the PHRs on component carrier 1, component carrier 4, and component carrier 2. Different from the triggered PHR, the PHR corresponding to the sent PH includes the triggered PHR.

In this example, in the MAC PDU, the existing LCID value used to identify the MAC CE as the PHR is still used, and the MAC CE identified by this value is the PHR in the case of multiple carriers. The UE determines that the PHR to be performed is the PHR in the case of multiple carriers according to its own capability information or through an RNC message of the eNB.

Concrete example five

The UE works on 4 component carriers, that is, the UE is assigned to 4 component carriers, namely component carrier 0, component carrier 1, component carrier 2 and component carrier 3, and these 4 component carriers are also component carriers supported by the UE. The PHR is triggered on component carrier 1 and component carrier 2 respectively, and the PHR is not triggered on other component carriers.

At the current moment, there are uplink transmission resources supporting PHR on component carrier 0 and component carrier 3 . Since the UE selects at least one component carrier for PHR transmission as long as there is an uplink transmission resource supporting PHR on at least one component carrier, therefore, at this time, the UE determines a PH for component carrier 1, that is, PH ₁ , and for component carrier 2 Determine a PH, that is, PH ₂ , organize PH ₁ and PH ₂ according to the set rules to obtain a combined PH, select component carrier 0 or component carrier 3 to send the PH corresponding to component carrier 1 and the PH corresponding to component carrier 2, that is, in The combined PH is sent on component carrier 0 or component carrier 3. The format of the MAC CE in this example is shown in Figure 5. The setting rule in this example is to arrange PH ₁ and PH ₂ in sequence. The current PHR corresponds to the PHR on component carrier 1 and component carrier 2, which is the same as the triggered PHR.

Since there is no fixed correspondence between the component carrier sending the PH and the component carrier corresponding to the PH, it is necessary to identify the component carrier corresponding to the sending PH by including auxiliary information in the setting rule, such as the PHR identifier of the component carrier. Indicates the component carrier corresponding to the current PHR. In this example, the PHR identifier of the component carrier is 4 bits, and the values of 0 and 1 of each bit are used to indicate the component carrier corresponding to the currently sent PH, which can save the control of MAC data. overhead. In this example, 0 is used to indicate that the PH corresponding to the component carrier is not currently sent, and 1 is used to indicate that the PH currently sent is the PH corresponding to the component carrier, and the opposite value is also possible. The setting rule also includes that each bit corresponds to the order of each component carrier from low to high in sequence from front to back, and the corresponding PHs are arranged according to the order of each component carrier.

In addition, component carrier 0 and component carrier 3 can also be selected to transmit the PH corresponding to component carrier 1 and the PH corresponding to component carrier 2, and the format of the corresponding MAC CE on each component carrier is still as shown in FIG. 5 .

Concrete example six

The UE works on 8 component carriers, that is, the UE is allocated to 8 component carriers, which are respectively component carrier 0 to component carrier 7 . PHR is triggered on component carrier 4, and PHR is not triggered on other component carriers.

At the current moment, there are only uplink transmission resources supporting PHR on component carrier 0. As long as there are uplink transmission resources supporting PHR on at least one component carrier, the UE will select at least one component carrier for PHR transmission. Therefore, at this time, UE Choose to report all PHs, and determine a PH for each assigned component carrier, that is, determine a PH for component carrier 0, that is, PH ₀ , determine a PH for component carrier 1, that is, PH ₁ ... for component carriers 7. Determine a PH, that is, PH _7. The UE sends the PH corresponding to each component carrier through component carrier 0. In this example, organize the determined multiple PHs according to the set rules to obtain a combined PH, and then send the PH on component carrier 0. Combining PHs, the setting rule is to organize PHs in a fixed order, such as arranging corresponding PHs in the order of component carriers, and the format of MAC CE is shown in Figure 6. The current PHR corresponds to the PHR on each component carrier. Different from the triggered PHR, the PHR corresponding to the sent PH includes the triggered PHR.

The setting rules may be pre-configured by the eNB. The setting rule may also arrange the corresponding PHs according to the frequency band of each component carrier, for example, arrange the corresponding PHs according to the frequency domain of each component carrier from low to high.

In this example, in the MAC PDU, a new value is introduced for the LCID to identify the PHR under the condition that the MAC CE is multi-carrier. This value is newly set, that is, it is set to other values that are not within the existing LCID value.

Concrete example seven

The UE works on 8 component carriers, that is, the UE is allocated to 8 component carriers, which are respectively component carrier 0 to component carrier 7 . The PHR is triggered on the component carrier 1 and the component carrier 2 respectively, and the PHR is not triggered on the other component carriers.

At the current moment, there are uplink transmission resources supporting PHR on component carrier 0 and component carrier 7 . Since the UE selects at least one of the component carriers for PHR transmission as long as there are uplink transmission resources supporting PHR on at least one component carrier, therefore, at this time, the UE determines a PH for component carrier 1, that is, PH ₁ , and determines a PH for component carrier 2. One PH, that is, PH ₂ , selects component carrier 0 or component carrier 7 for PHR transmission. In this example, PH ₁ and PH ₂ are organized according to the set rules to obtain a combined PH. The set rule is to use auxiliary information, such as component carrier The PHR identifier identifies the component carrier corresponding to the sent PH to indicate the component carrier corresponding to the current PHR, and arranges the corresponding PHs in the order of each component carrier, and then sends the combined PH and MAC CE on component carrier 0 or component carrier 7 The format is shown in Figure 7. The current PHR corresponds to the PHR on component carrier 1 and component carrier 2, which is the same as the triggered PHR.

Since there is no fixed correspondence between the component carrier sending the PH and the component carrier corresponding to the PH, it is necessary to identify the component carrier corresponding to the sending PH by including auxiliary information in the setting rule. The PHR identifier of the component carrier in this example is 8 bits, and each bit corresponds to the order of each component carrier from low to high in turn, and the values of 0 and 1 of each bit are used to indicate the corresponding PH of the currently sent component carriers, which can save the control overhead of MAC data. In this example, 0 is used to indicate that the PH corresponding to the component carrier is not currently sent, and 1 is used to indicate that the PH currently sent is the PH corresponding to the component carrier, and the opposite value is also possible.

In this example, in the MAC PDU, a new value is introduced for the LCID to identify the MAC CE as the PHR in the case of multiple carriers, and the value is selected from the existing LCID reserved value range.

Concrete example eight

The UE works on 4 component carriers, that is, the UE is assigned to 4 component carriers, namely component carrier 0, component carrier 1, component carrier 2 and component carrier 3, which belong to the 4 component carriers within the same transmit filter bandwidth of the UE. component carriers. PHR is triggered on component carrier 1, and PHR is not triggered on other component carriers.

As long as there is an uplink transmission resource supporting PHR on at least one component carrier, the UE will select at least one component carrier for PHR transmission. Therefore, when there is an uplink transmission resource supporting PHR on any carrier that the UE works on, such as component carrier 2 If there are uplink transmission resources supporting PHR, the UE determines a PH for all the allocated component carriers, as follows: PH=P _max -P ₀ -P ₁ -P ₂ -P ₃ , where P _max is the UE nominal P ₀ , P ₁ , P ₂ , and P ₃ are the UL-SCH transmit power estimated by the UE on component carrier 0, component carrier 1, component carrier 2, and component carrier 3, respectively. The UE selects the component carrier 2 to send the PH, and the format of the MAC CE in this example is shown in FIG. 8 .

Since the UE determines a PH for all the allocated component carriers, the PH sent on the component carrier must correspond to all the component carriers. Therefore, no other information is needed to identify the corresponding PH sent on the component carrier 2 at this time. component carrier. The current PHR corresponds to the PHR on each component carrier. Different from the triggered PHR, the PHR corresponding to the sent PH includes the triggered PHR.

FIG. 9 is a schematic structural diagram of a terminal implementing PHR in the present invention. As shown in FIG. 9, the terminal supports carrier aggregation technology and at least includes: a determining unit and a reporting unit, wherein the determining unit is used to determine the component carrier allocated to the UE One or more PH; the reporting unit is used to select at least one uplink component carrier for PHR transmission.

The reporting unit is specifically configured to select to send PH on at least one component carrier with uplink transmission resources supporting PHR, and the PHR corresponding to the sent PH includes at least the triggered PHR.

The specific implementation inside each unit is exactly the same as the previous description, and will not be repeated here.

The triggering of the above-mentioned PHR can be based on the currently set PHR trigger event to trigger the PHR, such as the three situations mentioned in the background technology; it can also be based on the newly set PHR trigger event to trigger the PHR, the new setting The PHR trigger event can be pre-configured by the eNB.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (13)

1. A method for realizing power headroom report, a user equipment UE supports a carrier aggregation technology, the method is characterized in that:

the UE determines one or more Power Headroom (PH) for the allocated component carriers, and selects Power Headroom Reporting (PHR) transmission on at least one uplink component carrier.

2. The method according to claim 1, wherein the UE determines one or more PHs for the allocated component carriers, specifically: for the component carriers allocated to the UE,

the UE determines one PH for one component carrier; or,

the UE determines one PH for a plurality of component carriers; or,

the UE determines one PH for both one component carrier and a plurality of component carriers.

3. The method of claim 2,

for the component carriers allocated to the UE, the UE determines a PH for one component carrier, specifically: the UE respectively determines a PH for each allocated component carrier; or,

for the component carriers allocated to the UE, the UE determines one PH for a plurality of component carriers, specifically: the UE determines one PH for all the allocated component carriers; or,

the plurality of component carriers of the determined one PH are a plurality of component carriers which are allocated to the UE and are contiguous in a frequency domain; or,

the plurality of component carriers of the determined PH are a plurality of component carriers within the same transmission filter bandwidth allocated to the UE and belonging to the UE.

4. The method of claim 2,

the PH corresponds to only one component carrier, and the determined PH is: the difference between the average nominal maximum transmission power of each component carrier of the UE and the uplink shared channel (UL-SCH) transmission power estimated by the UE on the component carrier;

or, the PH corresponds to only one component carrier, and the determined PH is: the difference value between the nominal maximum transmitting power of the UE and the uplink shared channel (UL-SCH) transmitting power estimated by the UE on the component carrier wave;

or, the PH corresponds to a plurality of component carriers, and the determined PH is:

a difference between a nominal maximum transmit power of the UE and a sum of UL-SCH transmit powers estimated by the UE on respective component carriers corresponding to the PH; or,

a difference between a nominal maximum transmit power of the UE and an arithmetic average of a sum of UL-SCH transmit powers estimated by the UE on respective component carriers corresponding to the PH; or,

a difference between a nominal maximum transmit power of the UE and an UL-SCH transmit power estimated by the UE on any one of the component carriers corresponding to the PH; or,

an average value of a difference between a nominal maximum transmission power of the UE and a sum of UL-SCH transmission powers estimated by the UE on respective component carriers corresponding to the PH.

5. The method according to claim 1, wherein the selecting for PHR transmission on at least one component carrier of an uplink specifically includes: selecting to send a PH on at least one component carrier with uplink transmission resources supporting PHR, wherein the sent PHR corresponding to the PH at least comprises a triggered PHR.

6. The method of claim 5,

the component carrier transmitting the PH is: any component carrier supported by the UE; or a PHR component carrier configured by a base station eNB, wherein the PHR component carrier is a component carrier used for the UE to perform PHR transmission;

further, the configuration of the PHR component carrier is implemented by the eNB sending dedicated signaling to the UE.

7. The method of claim 5, wherein the selecting PHR transmission on at least one component carrier with PHR-capable uplink transmission resources comprises:

when uplink transmission resources supporting the PHR exist on the component carrier triggering the PHR, selecting at least one component carrier to carry out PHR transmission; or,

when at least one component carrier has uplink transmission resources supporting PHR, at least one component carrier is selected for PHR transmission.

8. The method of claim 7,

selecting a component carrier for PHR transmission when uplink transmission resources supporting PHR exist on the component carrier, wherein the PHR transmission comprises the following steps: setting a component carrier index corresponding to the sent PH, and sending the component carrier index and the PH on a component carrier; and/or the presence of a gas in the gas,

selecting a component carrier for PHR transmission when uplink transmission resources supporting PHR exist on the component carrier, wherein the selecting the component carrier for PHR transmission comprises: transmitting a PH on a component carrier; or, a combined PH obtained by organizing a plurality of PHs according to a set rule is sent on one component carrier; or, one PH is respectively transmitted through at least one component carrier, and a combined PH obtained by organizing a plurality of PHs according to a set rule is also transmitted through at least one component carrier, where the component carrier transmitting one PH is different from the component carrier transmitting the combined PH; and/or the presence of a gas in the gas,

the selecting component carrier for PHR transmission is to select one component carrier to transmit multiple PHs, where the transmitting the PHs includes: and organizing the PHs according to a set rule to obtain a combined PH, and sending the combined PH on the component carrier.

9. The method of claim 8,

the set rule is as follows: pre-configured by the eNB to the UE; or sending a dedicated signaling to the UE through the eNB for providing to the UE; and/or the presence of a gas in the gas,

the set rule is as follows: setting an arrangement rule of each PH, or an arrangement rule of a component carrier index and a PH corresponding to a component carrier, or an arrangement rule of a PHR identifier and a PH corresponding to a component carrier.

10. The method according to any of claims 1 to 9, wherein the logical channel identity LCID used for identifying the PHR in the multi-carrier case takes values as:

a newly set value that is not within the range of the existing LCID value; or,

a value selected from the existing LCID reserved value interval; or,

there are LCID values that are used to identify the PHR.

11. The method of claim 10, wherein when the existing LCID value for identifying the PHR is used to identify the PHR in the multi-carrier case, the performing PHR transmission further includes:

the eNB informs the UE of the PHR under the condition of multi-carrier currently; or,

the UE determines that the PHR is carried out under the condition of multiple carriers according to the self capability information, and the eNB determines that the PHR carried out by the UE is under the condition of multiple carriers according to the capability information of the UE.

12. A terminal for realizing power headroom report, the terminal supports carrier aggregation technology, characterized in that the terminal comprises: a determining unit and a reporting unit, wherein,

the determining unit is configured to determine one or more PHs for component carriers allocated to a UE;

the reporting unit is configured to select at least one component carrier of an uplink for PHR transmission.

13. The terminal of claim 12, wherein the reporting unit is specifically configured to: selecting to send a PH on at least one component carrier with uplink transmission resources supporting PHR, wherein the sent PHR corresponding to the PH at least comprises a triggered PHR.

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