CN109963329B - Method and system for sending uplink power control command in LTE cell - Google Patents
Method and system for sending uplink power control command in LTE cell Download PDFInfo
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- CN109963329B CN109963329B CN201711419526.3A CN201711419526A CN109963329B CN 109963329 B CN109963329 B CN 109963329B CN 201711419526 A CN201711419526 A CN 201711419526A CN 109963329 B CN109963329 B CN 109963329B
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- 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
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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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
- H04W52/18—TPC being performed according to specific parameters
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Abstract
The embodiment of the invention provides a method and a system for sending an uplink power control command in an LTE cell. When at least one TPC command in the TPC commands of the PUSCH and the PUCCH of the UE needs to be fed back to the UE through the DCI format 3 or the DCI format 3A on the PDCCH, the eNodeB determines the DCI format adopted by the PDCCH which feeds back the TPC command for each TPC command which needs to be fed back; for any TPC command needing to be fed back and a DCI format X adopted by the TPC command needing to be fed back, wherein the DCI format X is DCI format 3 or DCI format 3A, the eNodeB selects an available TPC-RNTI in the allocated TPC-RNTI of the adopted DCI format X or allocates a new TPC-RNTI of the adopted DCI format X, selects a subscript in the subscript of the unallocated TPC command in the corresponding DCI format on the PDCCH scrambled by the selected or allocated TPC-RNTI, and the numerical value of the selected or allocated TPC-RNTI, the selected subscript, the type of the TPC command and the adopted DCI format form configuration information of the TPC command.
Description
Technical Field
The invention belongs to the technical field of Long Term Evolution (LTE), and particularly relates to a method and a system for sending an uplink power control command in an LTE cell.
Background
LTE is a long term evolution of The Universal Mobile Telecommunications System (UMTS) technology standard established by The 3rd Generation Partnership Project (3 GPP) organization. According to different duplexing modes, LTE systems are divided into frequency division duplexing (FDD-LTE) and time division duplexing (TDD-LTE), and the main difference between the two technologies lies in the physical layer of the air interface (such as frame structure, time division design, synchronization, etc.).
Currently, there are two types of cells in the LTE system in the 3GPP protocol: FDD cells and TDD cells. In both cells, the UE may be allocated a semi-static PUSCH, a semi-static PDSCH, and a PUCCH for feeding back ACK/NACK information for TBs on the semi-static PDSCH. Accordingly, uplink power control (UL TPC) commands of the semi-static PUSCH and the PUCCH corresponding to the semi-static PDSCH need to be fed back to the UE. And the UE adjusts the transmitting power of the semi-static PUSCH according to the feedback TPC command of the PUSCH and adjusts the transmitting power of the corresponding PUCCH according to the feedback TPC command of the PUCCH. Currently, in a 3GPP protocol, a TPC command of a PUSCH is carried to a UE through DCI format 3 or DCI format 3A on a PDCCH, and a TPC command of a PUCCH is also carried to the UE through DCI format 3 or DCI format 3A on the PDCCH, which is specifically as follows:
(1) DCI format 3 and DCI format 3A both include a number of bits equal to the number of bits included in DCI format 0, but each TPC command in both formats is represented by 2 bits or 1 bit, respectively. If DCI format 0 includes L bits, the number N of TPC commands carried by these two DCI formats is: n ═ int [ L/2] and N ═ L. And numbering N TPC commands on the DCI format 3 or the DCI format 3A from 0, wherein the number of a certain TPC command is a subscript of the TPC command.
(2) The TPC command of the PUSCH of the UE is carried to the UE through the DCI format 3 or 3A on the PDCCH scrambled by the TPC-PUSCH-RNTI. Here, each TPC-PUSCH-RNTI corresponds to one DCI format: DCI format 3 or DCI format 3A. For a certain UE, after determining that the TPC command of the PUSCH of the UE is fed back to the UE through DCI format 3 or DCI format 3A, the UE needs to be configured with a TPC-PUSCH-RNTI adopting DCI format 3 or DCI format 3A and a subscript n, and the TPC-PUSCH-RNTI, the subscript of the TPC command and the type of the TPC command configured to the UE and the adopted DCI format are carried to the UE through a special signaling. The type of the TPC command is as follows: TPC command for PUSCH. And the UE monitors the DCI format on the PDCCH scrambled by the TPC-PUSCH-RNTI according to the configuration information. When a corresponding PDCCH is detected, extracting a TPC command with the subscript of n in the DCI format on the PDCCH, and according to the type of the TPC command in the configuration information: and the TPC command of the PUSCH is used for adjusting the transmission power of the PUSCH of the UE.
(3) The TPC command of the PUCCH of the UE is carried to the UE through DCI format 3 or 3A on the PDCCH scrambled by the TPC-PUCCH-RNTI. Here, each TPC-PUCCH-RNTI corresponds to one DCI format: DCI format 3 or DCI format 3A. For a certain UE, after determining that the TPC command of the PUCCH of the UE is fed back to the UE through DCI format 3 or DCI format 3A, the UE needs to be configured with a TPC-PUCCH-RNTI adopting DCI format 3 or DCI format 3A and a subscript n, and the TPC-PUCCH-RNTI, the subscript of the TPC command and the type of the TPC command configured to the UE and the adopted DCI format are carried to the UE through a special signaling. The type of the TPC command is as follows: TPC command for PUCCH. And the UE monitors the DCI format on the PDCCH scrambled by the TPC-PUCCH-RNTI according to the configuration information. When a corresponding PDCCH is detected, extracting a TPC command with the subscript of n in the DCI format on the PDCCH, and according to the type of the TPC command in the configuration information: and the TPC command of the PUCCH is used for adjusting the transmission power of the PUCCH of the UE.
In the above process of allocating TPC-PUSCH-RNTI and TPC-PUCCH-RNTI to the UE, even though the TPC commands of PUSCH and PUCCH adopt the same DCI format: DCI format 3 or DCI format 3A, PUSCH and PUCCH cannot share a TPC command resource on DCI format 3/3A on PDCCH scrambled by a certain RNTI, that is: when the eNodeB determines that the TPC command of the semi-static PUSCH/PUCCH of one UE adopts the DCI format 3/3A, and newly allocates a TPC-PUSCH-RNTI/TPC-PUCCH-RNTI and a subscript which adopt the DCI format 3/3A to the UE, the other N-1 TPC commands in the N TPC commands carried on the DCI format 3/3A on the PDCCH scrambled by the TPC-PUSCH-RNTI/TPC-PUCCH-RNTI can only be allocated to the PUSCHs/PUCCHs of the other N-1 UEs which adopt the DCI format 3/3A, and are used for carrying the TPC commands of the PUSCHs/PUCCHs of the other N-1 UEs.
Table 1 shows an indication of allocation of RNTIs and PDCCHs in a TPC command for PUSCH and a TPC command transmission method for PUCCH.
TABLE 1
The above allocation method may cause that the TPC command resource on DCI format 3/3a on PDCCH scrambled by one RNTI is difficult to be fully utilized, resulting in resource waste. Such as: the first UE accesses the cell, and the eNodeB determines that the TPC command of the PUSCH of the UE needs to be carried by DCI format 3, and determines that the TPC command of the PUSCH is transmitted in a subframe offset to 0 in each 20ms period, see table 1. The eNodeB allocates an RNTI-1 and a subscript 0 which adopt a DCI format 3 to the UE, the PDCCH scrambled by the RNTI adopts the DCI format 3, and the PDCCH scrambled by the RNTI is transmitted by a subframe which is offset to 0 in each 20ms period. As shown in table 1, the eNodeB places RNTI-1 in a subframe that is offset to 0 within a period of 20ms to indicate the period and subframe position of PDCCH transmission scrambled by this RNTI. When a second UE accesses the cell, the eNodeB determines that the TPC command of the PUCCH of the UE needs to be carried by DCI format 3, and determines that the TPC command of the PUCCH is transmitted in a subframe offset to 0 in each 20ms period, see table 1 above. Because the PUSCH and the PUCCH cannot share TPC command resources on the PDCCH scrambled by the same RNTI, the eNodeB allocates the RNTI-2 and the subscript 0 which adopt a DCI format 3/3A to the UE, the PDCCH scrambled by the RNTI adopts a DCI format 3, and the PDCCH scrambled by the RNTI is transmitted by a subframe which is offset to 0 in each 20ms period. As shown in table 1 above, the eNodeB places RNTI-2 in a subframe offset to 0 within a period of 20ms to indicate the period and subframe position of PDCCH transmission scrambled by this RNTI. Thereafter, two PDCCHs need to be transmitted in a subframe offset to 0 in each 20ms period. Since the DCI format 3 can bear N TPC commands, according to the allocation method, the problem of TPC command resource waste exists on the DCI format 3 on the PDCCH scrambled by the RNTI-1/RNTI-2 until the N TPC commands are allocated to the PUSCH/PUCCH of the N UEs.
Disclosure of Invention
The embodiment of the invention provides a method and a system for sending an uplink power control command in an LTE cell.
The technical scheme of the embodiment of the invention is as follows:
a method for transmitting an uplink power control command in an LTE cell, the method comprising:
a user terminal UE reports the wireless capability information of the UE to a base station eNodeB;
the eNodeB configures uplink resources and downlink resources for the UE according to the wireless capability information of the UE;
when at least one TPC command in a transmission power control TPC command of a Physical Uplink Shared Channel (PUSCH) and a TPC command of a Physical Uplink Control Channel (PUCCH) of the UE needs to be fed back to the UE through a Physical Downlink Control Channel (PDCCH) uplink and downlink control information DCI format 3 or DCI format 3A, for each TPC command needing to be fed back, the eNodeB determines that the DCI format adopted by the PDCCH feeding back the TPC command is the DCI format, and the DCI format adopted by the PDCCH feeding back the TPC command is equal to the DCI format adopted by the TPC command;
for any one of the TPC command needing to be fed back and the DCI format X adopted by the TPC command needing to be fed back, wherein the DCI format X is DCI format 3 or DCI format 3A, the eNodeB selects one available TPC-RNTI in the allocated TPC-RNTI of the adopted DCI format X or allocates one new TPC-RNTI of the adopted DCI format X, selects one subscript from subscripts of the undistributed TPC command in the corresponding DCI format on the PDCCH scrambled by the selected or allocated TPC-RNTI, and the numerical value of the selected or allocated TPC-RNTI, the selected subscript, the type of the TPC command and the adopted DCI format form configuration information of the TPC command;
and the eNodeB carries configuration information of each TPC command needing to be fed back and distributed to the UE.
In one embodiment, the UE saves the configuration information of each TPC command that needs to be fed back, and feeds back a response message to the eNodeB;
and the UE monitors the PDCCH scrambled by the corresponding TPC-RNTI according to the stored configuration information of each TPC command so as to obtain the TPC command corresponding to the corresponding subscript in the corresponding DCI format on the PDCCH.
In one embodiment, the eNodeB carries configuration information of each TPC command needing feedback, allocated to the UE, to the UE through an RRC connection reconfiguration message;
the response message is an RRC connection reconfiguration complete message.
In one embodiment, where DCI format X is DCI format 3 or DCI format 3, the eNodeB selects an available TPC-RNTI or allocates a new TPC-RNTI in DCI format X from among the already allocated TPC-RNTIs in DCI format X, including:
when the eNodeB does not allocate the TPC-RNTI adopting the DCI format 3 or the DCI format 3A, the eNodeB newly allocates the TPC-RNTI adopting the DCI format 3 or the DCI format 3A;
when the eNodeB allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A, and at least one available TPC-RNTI is arranged in the allocated TPC-RNTI adopting DCI format 3 or DCI format 3A, and an unallocated subscript is arranged on the DCI format 3 or DCI format 3A on the PDCCH scrambled by the available TPC-RNTI, the eNodeB selects one available TPC-RNTI from the allocated TPC-RNTIs, wherein the unallocated subscript is arranged on the DCI format 3 or DCI format 3A on the PDCCH scrambled by the selected TPC-RNTI;
and when the eNodeB allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A and no available TPC-RNTI exists in all allocated TPC-RNTIs adopting DCI format 3 or DCI format 3A, newly allocating one TPC-RNTI adopting DCI format 3 or DCI format 3A.
In an embodiment, the selecting one available TPC-RNTI from among the allocated TPC-RNTIs using DCI format X is: the transmission time of the available TPC-RNTI scrambled PDCCH coincides with the feedback time of the corresponding TPC command.
A system for transmitting uplink power control commands in an LTE cell, the system comprising a user terminal, UE, and a base station, eNodeB, wherein:
the UE is used for reporting the wireless capability information of the UE to the eNodeB;
the eNodeB is used for configuring uplink resources and downlink resources for the UE according to the wireless capability information of the UE;
when at least one TPC command in a transmission power control TPC command of a Physical Uplink Shared Channel (PUSCH) and a TPC command of a Physical Uplink Control Channel (PUCCH) of the UE needs to be fed back to the UE through a Physical Downlink Control Channel (PDCCH) uplink and downlink control information (DCI format 3 or DCI format 3A), the eNodeB is used for determining the DCI format adopted by the PDCCH which feeds back the TPC command for each TPC command which needs to be fed back, and the DCI format adopted by the PDCCH which feeds back the TPC command is equal to the DCI format adopted by the TPC command;
for any one of the TPC command needing to be fed back and the DCI format X adopted by the TPC command needing to be fed back, wherein the DCI format X is DCI format 3 or DCI format 3A, the eNodeB is used for selecting one available TPC-RNTI in the allocated TPC-RNTI adopting the DCI format X or allocating one new TPC-RNTI adopting the DCI format X, selecting one subscript from subscripts of the TPC commands which are not allocated in the corresponding DCI format on the PDCCH scrambled by the selected or allocated TPC-RNTI, and the numerical value of the selected or allocated TPC-RNTI, the selected subscript, the type of the TPC command and the adopted DCI format form configuration information of the TPC command;
and the eNodeB is used for carrying configuration information of each TPC command needing to be fed back and distributed to the UE.
In one embodiment, the UE is configured to store configuration information of each TPC command that needs to be fed back, and feed back a response message to the eNodeB; and monitoring the PDCCH scrambled by the corresponding TPC-RNTI according to the stored configuration information of each TPC command so as to obtain the TPC command corresponding to the corresponding subscript in the corresponding DCI format on the PDCCH.
In one embodiment, the eNodeB is configured to carry configuration information of each TPC command that needs to be fed back and is allocated to the UE through an RRC connection reconfiguration message; the response message is an RRC connection reconfiguration complete message.
In one embodiment, where DCI format X is DCI format 3 or DCI format 3A, the eNodeB selects an available TPC-RNTI or allocates a new TPC-RNTI in DCI format X among the already allocated TPC-RNTIs in DCI format X, including:
when the eNodeB does not allocate the TPC-RNTI adopting the DCI format 3 or the DCI format 3A, the eNodeB newly allocates the TPC-RNTI adopting the DCI format 3 or the DCI format 3A;
when the eNodeB allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A, and at least one available TPC-RNTI is arranged in the allocated TPC-RNTI adopting DCI format 3 or DCI format 3A, and an unallocated subscript is arranged on the DCI format 3 or DCI format 3A on the PDCCH scrambled by the available TPC-RNTI, the eNodeB selects one available TPC-RNTI from the allocated TPC-RNTI adopting DCI format 3 or DCI format 3A, wherein the unallocated subscript is arranged in the DCI format 3 or DCI format 3A on the PDCCH scrambled by the selected TPC-RNTI;
and when the eNodeB allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A and no available TPC-RNTI exists in all allocated TPC-RNTIs adopting DCI format 3 or DCI format 3A, newly allocating one TPC-RNTI adopting DCI format 3 or DCI format 3A.
In an embodiment, the selecting one available TPC-RNTI from among the allocated TPC-RNTIs using DCI format X is: the transmission time of the available TPC-RNTI scrambled PDCCH coincides with the feedback time of the corresponding TPC command.
According to the technical scheme, in order to solve the problem of resource waste of RNTI and PDCCH in the sending method of the TPC command of PUSCH and the TPC command of PUCCH in the LTE cell at present, the embodiment of the invention provides that the PUSCH and the PUCCH are allowed to share the TPC command resource on the DCI format 3 or the DCI format 3A scrambled by the same RNTI in the sending method of the TPC command of PUSCH and the TPC command of PUCCH, so that the RNTI and the PDCCH are saved, and the system resource is saved.
Drawings
Fig. 1 is a flowchart of a method for sending an uplink power control command in an LTE cell according to the present invention.
Fig. 2 is a structural diagram of a system for transmitting uplink power control commands in an LTE cell according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the accompanying drawings.
For simplicity and clarity of description, the aspects of the invention are set forth below by describing several representative embodiments. Numerous details of the embodiments are set forth to provide an understanding of the principles of the invention. It will be apparent, however, that the invention may be practiced without these specific details. Some embodiments are not described in detail, but rather are merely provided as frameworks, in order to avoid unnecessarily obscuring aspects of the invention. Hereinafter, "comprising" means "including but not limited to", "according to … …" means "at least according to … …, but not limited to … … only". In view of the language convention of chinese, the following description, when it does not specifically state the number of a component, means that the component may be one or more, or may be understood as at least one.
In order to solve the problem of resource waste of a Radio Network Temporary Identity (RNTI) and a Physical Downlink Control Channel (PDCCH) in a transmission method of a Transmit Power Control (TPC) command of a Physical Uplink Shared Channel (PUSCH) and a TPC command of a Physical Uplink Control Channel (PUCCH) in an LTE cell at present, an embodiment of the present invention provides: the PUSCH and the PUCCH are allowed to share the TPC command resource on a Downlink Control Information (DCI) format 3/3A on the PDCCH scrambled by the same RNTI in the TPC command transmission method of the PUSCH and the TPC command transmission method of the PUCCH. In the above example, according to the method of the embodiment of the present invention, PUSCH and PUCCH are allowed to share one RNTI-scrambled TPC command resource on DCI format 3/3a on PDCCH, when a second UE accesses, it is not necessary to allocate RNTI-2 to the UE, and RNTI-1 and TPC command index 1 to the UE, so that one RNTI and one PDCCH can be saved in each 20ms period.
As can be seen, in view of the technical problem in the prior art that PUSCH and PUCCH cannot share TPC command resources on DCI format 3/3a on PDCCH scrambled by the same RNTI in an LTE cell, the embodiments of the present invention share TPC command resources on DCI format 3/3a on PDCCH scrambled by the same RNTI in the PUSCH and PUCCH in the LTE cell to save the TPC-type RNTI and the corresponding PDCCH resources. That is to say, in the current sending method of the TPC command of the PUSCH and the TPC command of the PUCCH in the LTE cell, the PUSCH and the PUCCH cannot share the TPC command resource on DCI format 3/3a on the PDCCH scrambled by the same RNTI, which causes the waste of the RNTI resource of the TPC type and the PDCCH resource, the present invention proposes: in the sending method of the TPC command of the PUSCH and the TPC command of the PUCCH in the LTE cell, the PUSCH and the PUCCH are allowed to share the TPC command resource on the DCI format 3/3A on the PDCCH scrambled by the same RNTI, so that the RNTI of the TPC type and the corresponding PDCCH resource are saved.
Fig. 1 is a flowchart of a method for transmitting an uplink power control command in an LTE cell according to the present invention.
As shown in fig. 1, the method includes:
step 101: after accessing the LTE cell, the UE reports the wireless capability information of the UE to the eNodeB.
Step 102: and the eNodeB configures uplink and downlink resources for the UE based on the wireless capability information reported by the UE.
Step 103: when at least one TPC command in the TPC commands of the PUSCH and the PUCCH of the UE needs to be fed back to the UE through the DCI format 3 or the DCI format 3A on the PDCCH, the eNodeB determines the DCI format adopted by the PDCCH which feeds back the TPC command for each TPC command which needs to be fed back. Wherein: the DCI format used by the PDCCH feeding back the TPC command is also the DCI format used by the TPC command.
Step 104: for any TPC command needing to be fed back and the DCI format X adopted by the TPC command, the eNodeB selects an available TPC-RNTI in the allocated TPC-RNTI adopting the DCI format X or allocates a new TPC-RNTI adopting the DCI format X, selects a subscript in a TPC command subscript which is not allocated in the corresponding DCI format on the PDCCH scrambled by the TPC-RNTI, wherein the numerical value of the selected or newly allocated TPC-RNTI, the selected subscript, the type of the TPC command and the adopted DCI format form configuration information of the TPC command. Wherein: the DCI format X is DCI format 3 or DCI format 3A, and the type of the TPC command is: a TPC command of PUSCH or a TPC command of PUCCH. For any TPC command needing to be fed back and the DCI format X adopted by the TPC command, the available TPC-RNTI in the allocated TPC-RNTI adopting the DCI format X is as follows: the time of transmitting the PDCCH scrambled by the TPC-RNTI is consistent with the feedback time of the TPC command required to be fed back.
Specifically, for the UE, when any TPC command that needs to be fed back is a PUSCH command or a PUCCH TPC command and step 103 determines that the TPC command adopts DCI format 3 or DCI format 3A, the process of the eNodeB selecting one available TPC-RNTI or allocating one new TPC-RNTI adopting DCI format 3 or DCI format 3A from among the already allocated TPC-RNTIs adopting DCI format 3 or DCI format 3A is specifically as follows:
(1) when the eNodeB has not allocated the TPC-RNTI adopting the DCI format 3 or the DCI format 3A, the eNodeB newly allocates one TPC-RNTI adopting the DCI format 3 or the DCI format 3A.
(2) The eNodeB allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A, and when at least one available TPC-RNTI exists in the allocated TPC-RNTI and an unallocated subscript exists on DCI format 3 or DCI format 3A on the PDCCH scrambled by the TPC-RNTI, the eNodeB selects one available TPC-RNTI from the allocated TPC-RNTIs. There is an unallocated subscript in DCI format 3 or DCI format 3A on the PDCCH scrambled by the selected TPC-RNTI.
(3) The eNodeB allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A, but no available TPC-RNTI is available in all allocated TPC-RNTIs, and newly allocates one TPC-RNTI adopting DCI format 3 or DCI format 3A in the scene.
The eNodeB selects an available TPC-RNTI or newly allocates a TPC-RNTI adopting DCI format 3 or DCI format 3A from the allocated TPC-RNTIs adopting DCI format 3 or DCI format 3A, selects a subscript from the unallocated TPC subscripts in DCI format 3 or DCI format 3A on the PDCCH scrambled by the TPC-RNTI, and selects the numerical value of the selected TPC-RNTI, the selected subscript and the type of the TPC command and the configuration information of the TPC command of which the adopted DCI format (DCI format 3 or DCI format 3A) is PUSCH or PUCCH.
Preferably, the TPC-RNTI available in the allocated TPC-RNTI in DCI format 3 or DCI format 3A is: the time of transmitting the PDCCH scrambled by the TPC-RNTI is consistent with the feedback time of the TPC command required to be fed back. Specifically, each subframe for feeding back the TPC command may be determined according to a period for feeding back the TPC command and a subframe position for feeding back the TPC command in each period, and each subframe for transmitting the TPC-RNTI-scrambled PDCCH may be determined according to a transmission period of the TPC-RNTI-scrambled PDCCH and a subframe position transmitted in each period. Each subframe for feeding back the TPC command is a subset of each subframe for transmitting the PDCCH scrambled by the TPC-RNTI.
Step 105: the eNodeB carries configuration information of each TPC command to be fed back, assigned to the UE, to the UE through dedicated signaling.
Preferably, the dedicated signaling may be implemented as an RRC connection reconfiguration message.
Step 106: the UE stores the configuration information of each TPC command needing to be fed back in the dedicated signaling, and feeds back a response message to the eNodeB.
Preferably, the response message may be implemented as an RRC connection reconfiguration complete message.
Step 107: and the UE monitors the PDCCH scrambled by the corresponding TPC-RNTI according to the stored configuration information of each TPC command, and acquires the TPC command corresponding to the corresponding subscript in the corresponding DCI format on the PDCCH. And executing corresponding processing according to the obtained TPC command, wherein when the obtained TPC command is the TPC command of the PUSCH or PUCCH, the UE adjusts the transmission power of the PUSCH or PUCCH according to the command.
The embodiment of the invention also provides a system for sending the uplink power control command in the LTE cell.
Fig. 2 is a structural diagram of a system for transmitting uplink power control commands in an LTE cell according to the present invention.
As shown in fig. 2, the system includes a UE201 and an eNodeB202, where:
the UE201 is configured to report radio capability information of the UE to the eNodeB 202;
the eNodeB202 is used for configuring uplink resources and downlink resources for the UE according to the wireless capability information of the UE;
when at least one of the TPC commands of the UE201 on the PUSCH and the PUCCH needs to be fed back to the UE201 through the PDCCH uplink and downlink control information DCI format 3 or DCI format 3A, for each TPC command that needs to be fed back, the eNodeB202 is configured to determine the DCI format used by the PDCCH that feeds back the TPC command, where the DCI format used by the PDCCH that feeds back the TPC command is equal to the DCI format used by the TPC command;
for any one of the TPC commands needing to be fed back and the DCI format X adopted by the TPC command, the eNodeB202 is configured to select an available TPC-RNTI or allocate a new TPC-RNTI adopting the DCI format X from among the allocated TPC-RNTIs adopting the DCI format X, select a subscript from subscripts of the TPC commands that are not allocated in the corresponding DCI format on the PDCCH scrambled by the selected or allocated TPC-RNTI, where the value of the selected or allocated TPC-RNTI, the selected subscript, the type of the TPC command, and the adopted DCI format constitute configuration information of the TPC command; wherein: the DCI format X is DCI format 3 or DCI format 3A, and the type of the TPC command is: a TPC command of PUSCH or a TPC command of PUCCH. For any TPC command needing to be fed back and the DCI format X adopted by the TPC command, the available TPC-RNTI in the allocated TPC-RNTI adopting the DCI format X is as follows: the time of transmitting the PDCCH scrambled by the TPC-RNTI is consistent with the feedback time of the TPC command required to be fed back.
The eNodeB202 is configured to carry configuration information of each TPC command needing feedback, which is allocated to the UE201, to the UE.
In one embodiment, the UE201 is configured to store configuration information of each TPC command that needs to be fed back, and feed back a response message to the eNodeB 202; and monitoring the PDCCH scrambled by the corresponding TPC-RNTI according to the stored configuration information of each TPC command so as to obtain the TPC command corresponding to the corresponding subscript in the corresponding DCI format on the PDCCH.
In one embodiment, the eNodeB202 is configured to carry configuration information of each TPC command needing feedback, allocated to the UE, to the UE201 through an RRC connection reconfiguration message; the response message is an RRC connection reconfiguration complete message.
In one embodiment, the selecting an available TPC-RNTI from among already allocated TPC-RNTIs using DCI format X or allocating a new TPC-RNTI using DCI format X includes:
the DCI format X adopted by the TPC command needing to be fed back is DCI format 3 or DCI format 3A, and when the eNodeB202 does not allocate the TPC-RNTI adopting DCI format 3 or DCI format 3A, the eNodeB newly allocates the TPC-RNTI adopting DCI format 3 or DCI format 3A;
when the eNodeB202 allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A, and there is at least one available TPC-RNTI in the allocated TPC-RNTI, and there is an unallocated subscript on DCI format 3 or DCI format 3A on the PDCCH scrambled by the available TPC-RNTI, the eNodeB202 selects one available TPC-RNTI in the allocated TPC-RNTI, wherein there is an unallocated subscript in DCI format 3 or DCI format 3A on the PDCCH scrambled by the selected TPC-RNTI;
when the eNodeB202 has allocated at least one TPC-RNTI in DCI format 3 or DCI format 3A and there is no available TPC-RNTI in all the allocated TPC-RNTIs, newly allocating one TPC-RNTI in DCI format 3 or DCI format 3A.
In an embodiment, the selecting one available TPC-RNTI from among the allocated TPC-RNTIs using DCI format X is: the transmission time of the available TPC-RNTI scrambled PDCCH coincides with the feedback time of the corresponding TPC command.
In summary, in the embodiments of the present invention, to solve the problem of wasting RNTI and PDCCH resources in the current sending method of the TPC command for PUSCH and the TPC command for PUCCH in an LTE cell, the embodiments of the present invention provide that PUSCH and PUCCH are allowed to share the TPC command resources in DCI format 3 or DCI format 3A on the PDCCH scrambled by the same RNTI in the sending method of the TPC command for PUSCH and the TPC command for PUCCH, so as to save RNTI and PDCCH, and save system resources.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. 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 (10)
1. A method for sending an uplink power control command in an LTE cell, the method comprising:
a user terminal UE reports the wireless capability information of the UE to a base station eNodeB;
the eNodeB configures uplink resources and downlink resources for the UE according to the wireless capability information of the UE;
when at least one TPC command in a transmission power control TPC command of a Physical Uplink Shared Channel (PUSCH) and a TPC command of a Physical Uplink Control Channel (PUCCH) of a UE needs to be fed back to the UE through a Physical Downlink Control Channel (PDCCH) uplink and downlink control information (DCI format 3 or DCI format 3A), for each TPC command needing to be fed back, the eNodeB determines a DCI format adopted by the PDCCH which feeds back the TPC command, and the DCI format adopted by the PDCCH which feeds back the TPC command is equal to the DCI format adopted by the TPC command;
for any one of the TPC command needing to be fed back and the DCI format X adopted by the TPC command needing to be fed back, wherein the DCI format X is DCI format 3 or DCI format 3A, the eNodeB selects one available TPC-RNTI in the allocated TPC-RNTI adopting the DCI format X, selects one subscript in subscripts of the TPC command which is not allocated in the corresponding DCI format on the PDCCH scrambled by the selected TPC-RNTI, and the numerical value of the selected TPC-RNTI, the selected subscript, the type of the TPC command and the adopted DCI format form configuration information of the TPC command; wherein the eNodeB selects one available TPC-RNTI from the allocated TPC-RNTIs adopting the DCI format X, and the selection comprises the following steps: the eNodeB allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A, and when at least one available TPC-RNTI exists in the allocated TPC-RNTI and an unallocated subscript exists on DCI format 3 or DCI format 3A on the PDCCH scrambled by the TPC-RNTI, the eNodeB selects one available TPC-RNTI in the allocated TPC-RNTI;
and the eNodeB carries configuration information of each TPC command needing to be fed back and distributed to the UE.
2. The method of transmitting uplink power control commands in an LTE cell of claim 1,
the UE saves the configuration information of each TPC command needing to be fed back and feeds back a response message to the eNodeB;
and the UE monitors the PDCCH scrambled by the corresponding TPC-RNTI according to the stored configuration information of each TPC command so as to obtain the TPC command corresponding to the corresponding subscript in the corresponding DCI format on the PDCCH.
3. The method of transmitting uplink power control commands in an LTE cell of claim 2,
the eNodeB carries configuration information of each TPC command needing to be fed back and distributed to the UE through an RRC connection reconfiguration message;
the response message is an RRC connection reconfiguration complete message.
4. The method of claim 1, wherein the DCI format X is DCI format 3 or DCI format 3, and the eNodeB selects one available TPC-RNTI in the allocated TPC-RNTIs using DCI format X, comprising:
when the eNodeB allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A, and at least one available TPC-RNTI is arranged in the allocated TPC-RNTI adopting DCI format 3 or DCI format 3A, and an unallocated subscript is arranged on the DCI format 3 or DCI format 3A on the PDCCH scrambled by the available TPC-RNTI, the eNodeB selects one available TPC-RNTI from the allocated TPC-RNTIs, wherein the unallocated subscript is arranged on the DCI format 3 or DCI format 3A on the PDCCH scrambled by the selected TPC-RNTI;
and when the eNodeB allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A and no available TPC-RNTI exists in all allocated TPC-RNTIs adopting DCI format 3 or DCI format 3A, newly allocating one TPC-RNTI adopting DCI format 3 or DCI format 3A.
5. The method of transmitting uplink power control commands in an LTE cell of claim 4,
selecting one available TPC-RNTI from the allocated TPC-RNTIs adopting the DCI format X as follows: the transmission time of the available TPC-RNTI scrambled PDCCH coincides with the feedback time of the corresponding TPC command.
6. A system for transmitting uplink power control commands in an LTE cell, the system comprising a user equipment UE and a base station eNodeB, wherein:
the UE is used for reporting the wireless capability information of the UE to the eNodeB;
the eNodeB is used for configuring uplink resources and downlink resources for the UE according to the wireless capability information of the UE;
when at least one TPC command in a transmission power control TPC command of a Physical Uplink Shared Channel (PUSCH) and a TPC command of a Physical Uplink Control Channel (PUCCH) of the UE needs to be fed back to the UE through a Physical Downlink Control Channel (PDCCH) uplink and downlink control information (DCI format 3 or DCI format 3A), the eNodeB is used for determining the DCI format adopted by the PDCCH which feeds back the TPC command for each TPC command which needs to be fed back, and the DCI format adopted by the PDCCH which feeds back the TPC command is equal to the DCI format adopted by the TPC command;
for any one of the TPC command needing to be fed back and the DCI format X adopted by the TPC command needing to be fed back, wherein the DCI format X is DCI format 3 or DCI format 3A, the eNodeB is used for selecting one available TPC-RNTI in the distributed TPC-RNTI adopting DCI format X, selecting a subscript from subscripts of the TPC commands which are not distributed in the corresponding DCI format on the PDCCH scrambled by the selected TPC-RNTI, and the numerical value of the selected TPC-RNTI, the selected subscript, the type of the TPC command and the adopted DCI format form configuration information of the TPC command; wherein the eNodeB selects one available TPC-RNTI from the allocated TPC-RNTIs adopting the DCI format X, and the selection comprises the following steps: the eNodeB allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A, and when at least one available TPC-RNTI exists in the allocated TPC-RNTI and an unallocated subscript exists on DCI format 3 or DCI format 3A on the PDCCH scrambled by the TPC-RNTI, the eNodeB selects one available TPC-RNTI in the allocated TPC-RNTI;
and the eNodeB is used for carrying configuration information of each TPC command needing to be fed back and distributed to the UE.
7. The system for transmitting uplink power control commands in an LTE cell of claim 6,
the UE is used for storing the configuration information of each TPC command needing to be fed back and feeding back a response message to the eNodeB; and monitoring the PDCCH scrambled by the corresponding TPC-RNTI according to the stored configuration information of each TPC command so as to obtain the TPC command corresponding to the corresponding subscript in the corresponding DCI format on the PDCCH.
8. The system for transmitting uplink power control commands in an LTE cell of claim 7,
the eNodeB is used for carrying configuration information of each TPC command needing to be fed back and distributed to the UE through an RRC connection reconfiguration message; the response message is an RRC connection reconfiguration complete message.
9. The system for transmitting uplink power control commands in an LTE cell as claimed in claim 6, wherein the DCI format X is DCI format 3 or DCI format 3A, and the eNodeB selects one available TPC-RNTI among the allocated TPC-RNTIs using DCI format X, comprising:
when the eNodeB allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A, and at least one available TPC-RNTI is arranged in the allocated TPC-RNTI adopting DCI format 3 or DCI format 3A, and an unallocated subscript is arranged on the DCI format 3 or DCI format 3A on the PDCCH scrambled by the available TPC-RNTI, the eNodeB selects one available TPC-RNTI from the allocated TPC-RNTI adopting DCI format 3 or DCI format 3A, wherein the unallocated subscript is arranged in the DCI format 3 or DCI format 3A on the PDCCH scrambled by the selected TPC-RNTI;
and when the eNodeB allocates at least one TPC-RNTI adopting DCI format 3 or DCI format 3A and no available TPC-RNTI exists in all allocated TPC-RNTIs adopting DCI format 3 or DCI format 3A, newly allocating one TPC-RNTI adopting DCI format 3 or DCI format 3A.
10. The system for transmitting uplink power control commands in an LTE cell of claim 9,
selecting one available TPC-RNTI from the allocated TPC-RNTIs adopting the DCI format X as follows: the transmission time of the available TPC-RNTI scrambled PDCCH coincides with the feedback time of the corresponding TPC command.
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