CN109729576B - Power control method, system and terminal - Google Patents
Power control method, system and terminal Download PDFInfo
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- CN109729576B CN109729576B CN201711018700.3A CN201711018700A CN109729576B CN 109729576 B CN109729576 B CN 109729576B CN 201711018700 A CN201711018700 A CN 201711018700A CN 109729576 B CN109729576 B CN 109729576B
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Abstract
The disclosure discloses a power control method, a system and a terminal, and relates to the field of wireless communication. The method comprises the following steps: a terminal receives an RRC reconfiguration signaling sent by a base station, wherein the RRC reconfiguration signaling comprises a power control mode; determining whether the base station transmits a power control bit through MAC layer control information according to the power control mode; if the base station sends the power control bit through the MAC layer control information, the terminal obtains the power control bit through the downlink MAC layer control information and adjusts the transmitting power of the terminal according to the power control bit. The method and the device increase the length of the power control information, so that when the wireless signal is rapidly faded, the transmitting power of the terminal can be rapidly improved, and the occupation of PDCCH resources is saved.
Description
Technical Field
The present disclosure relates to the field of wireless communications, and in particular, to a power control method, system and terminal.
Background
For the transmission of the power Control Information, in the prior art, the power Control Information of other scenes is transmitted in a DCI (Downlink Control Information) of a PDCCH (Physical Downlink Control Channel) except for the MSG 3. For non-SPS (Semi-Persistent Scheduling) enabled, power Control information of PUCCH (Physical Uplink Control Channel) is transmitted in DCI 0/4. For SPS enablement, power control information of PUSCH (Physical Uplink Shared Channel) is transmitted in DCI 1/1A/1B/1D/2/2A/2B/2C/2D. For SPS enabled, power control information for PUCCH and PUSCH is transmitted in DCI 3.
Because the DCI information length of PDCCH is limited, PCB (Power Control Bit) has only 2 bits, the maximum Power adjustment amplitude is only 3dB, when the wireless signal fading amplitude is large, the uplink Power Control can not play a role; the SPS function is used to save PDCCH resources, but in order to implement power control after the SPS function is turned on, the network still needs to occupy PDCCH resources to send PDCCH scrambled by TPC RNTI.
Disclosure of Invention
One technical problem to be solved by the present disclosure is to provide a power control method, system and terminal, which can quickly increase the terminal transmission power when the wireless signal is fading fast.
According to an aspect of the present disclosure, a power control method is provided, including: a terminal receives a Radio Resource Control (RRC) reconfiguration signaling sent by a base station, wherein the RRC reconfiguration signaling comprises a power control mode; determining whether the base station transmits a power control bit through the MAC layer control information according to the power control mode; if the base station sends the power control bit through the MAC layer control information, the terminal obtains the power control bit through the downlink MAC layer control information and adjusts the transmitting power of the terminal according to the power control bit.
Further, the method further comprises: if the base station does not transmit the power control bit through the MAC layer control information, the terminal acquires the power control bit through the downlink control information DCI of the physical downlink control channel PDCCH.
Further, if the service is an asymmetric service, the terminal acquires a power control bit through the DCI of the PDCCH; if the service is a symmetric service, the terminal acquires the power control bit through the MAC layer control information.
Further, the terminal acquires power control bits through MAC layer control information in an mth subframe of the downlink data, and adjusts the power of a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) in an m +4 subframe of the downlink data according to the power control bits.
Further, the power control bits are transmitted in the MAC layer multiplexed into the downlink shared channel DL-SCH.
Further, different codes of the power control bit identify different amplitudes for adjusting the transmission power of the terminal.
According to another aspect of the present disclosure, there is also provided a terminal, including: a signaling receiving unit, configured to receive a radio resource control RRC reconfiguration signaling sent by a base station, where the RRC reconfiguration signaling includes a power control mode; a transmission judging unit for determining whether the base station transmits the power control bit through the medium access control MAC layer control information according to the power control mode; a power control bit obtaining unit, configured to obtain a power control bit through downlink MAC layer control information if the base station sends the power control bit through MAC layer control information; and the power adjusting unit is used for adjusting the transmitting power of the terminal according to the power control bit.
Further, the power control bit obtaining unit is further configured to obtain the power control bit through downlink control information DCI of a physical downlink control channel PDCCH if the base station does not send the power control bit through MAC layer control information.
Further, the power control bit obtaining unit is further configured to obtain the power control bit through DCI of the PDCCH if the service is an asymmetric service; and if the service is a symmetric service, acquiring the power control bit through the MAC layer control information.
Further, the power control bit obtaining unit is configured to obtain a power control bit through MAC layer control information in an mth subframe of the downlink data; the power adjusting unit is used for adjusting the power of a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) in the (m + 4) th subframe of the downlink data according to the power control bit.
Further, the power control bits are transmitted in the MAC layer multiplexed into the downlink shared channel DL-SCH.
Further, different codes of the power control bit identify different amplitudes for adjusting the transmission power of the terminal.
According to another aspect of the present disclosure, a power control system is also provided, which includes a base station and the terminal described above.
According to another aspect of the present disclosure, there is also provided a terminal, including: a memory; and a processor coupled to the memory, the processor configured to perform the method as described above based on instructions stored in the memory.
According to another aspect of the present disclosure, a computer-readable storage medium is also proposed, on which computer program instructions are stored, which instructions, when executed by a processor, implement the steps of the above-described method.
The terminal can acquire the power control bit through the downlink MAC layer control information, and the length of the power control information is increased, so that the transmitting power of the terminal can be quickly improved when the wireless signal is rapidly faded, and the occupation of PDCCH resources is saved.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
fig. 1 is a flow chart illustrating a power control method according to an embodiment of the disclosure.
Fig. 2 is a schematic flow chart of another embodiment of the disclosed power control method.
Fig. 3 is a schematic diagram of a MAC layer packet header of the PCB of the present disclosure.
Fig. 4 is a MAC layer format of the PCB of the present disclosure.
Fig. 5 is a meaning of the PCB of the present disclosure.
Fig. 6 is a schematic structural diagram of an embodiment of a terminal of the present disclosure.
Fig. 7 is a schematic structural diagram of an embodiment of a power control system of the present disclosure.
Fig. 8 is a schematic structural diagram of another embodiment of the terminal of the present disclosure.
Fig. 9 is a schematic structural diagram of a terminal according to still another embodiment of the disclosure.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
Fig. 1 is a flow chart illustrating a power control method according to an embodiment of the disclosure.
In step 110, the terminal receives a Radio Resource Control (RRC) reconfiguration signaling sent by the base station, where the RRC reconfiguration signaling includes a Power Control Mode (PCM). When a service is established, the network side carries PCM through RRC reconfiguration information, where the PCM is used to indicate a transmission mode of power control information, and for example, if the PCM is 0, a power control bit is transmitted in a PDCCH; if the PCM is 1, the power Control bit is transmitted in MAC (Media Access Control) Control information.
In step 120, it is determined whether the base station transmits the power control bit through the MAC layer control information according to the power control mode.
In step 130, if the base station sends the power control bit through the MAC layer control information, the terminal obtains the power control bit through the downlink MAC layer control information, and adjusts the terminal transmission power according to the power control bit. For example, PUSCH or PUCCH power is adjusted.
If the base station does not send the power control bit through the MAC layer control information, the terminal obtains the power control bit through the DCI of the PDCCH and adjusts the transmitting power of the terminal according to the power control bit.
In the above embodiment, the terminal may obtain the power control bit through the downlink MAC layer control information, and the length of the power control information is increased, so that when the wireless signal is faded fast, the transmission power of the terminal may be raised fast, and the PDCCH resource occupation is saved.
Fig. 2 is a schematic flow chart of another embodiment of the disclosed power control method.
In step 210, when establishing a service, the base station configures a power control mode through RRC reconfiguration signaling, for example, if the service is an asymmetric service, such as BE service, PCM is 0, and the identification PCB is transmitted through PDCCH; if the service is a symmetric service, such as VoLTE service, the PCM is 1, and the identification PCB is transmitted in the MAC control information, where the PCB is multiplexed in the DL-SCH at the MAC layer for transmission.
In step 220, the terminal determines the power control mode, and if PCM is 0, step 230 is executed, and if PCM is 1, step 240 is executed.
In step 230, the terminal acquires a power control bit through DCI of a PDCCH in an mth subframe of downlink data, where m is a natural number.
In step 231, the terminal adjusts PUSCH or PUCCH power according to the power control bit in the m +4 th subframe of the downlink data.
In step 240, the terminal acquires a power control bit through MAC layer control information in an mth subframe of the downlink data. Wherein, a new MAC control information PCB can be defined by the MAC layer, and the PCB is multiplexed into the DL-SCH at the MAC layer for transmission. As shown in fig. 3, the MAC layer Header of the PCB has a logical channel ID of 11001, R is a reserved bit, E indicates whether a MAC sub-Header exists after the MAC sub-Header (subheader), for example, when E is 1, it indicates that another MAC sub-Header exists after the MAC sub-Header.
The MAC layer format of PCB is shown in fig. 4, R is reserved bit, the specific meaning of PCB is shown in fig. 5, and different codes indicate different adjusted PUSCH or PUCCH power amplitudes.
In step 241, the terminal adjusts the PUSCH or PUCCH power according to the power control bit in the m +4 th subframe of the downlink data.
In this embodiment, the base station configures a power control mode through RRC signaling, and the terminal determines whether to obtain a power control bit through DCI of the PDCCH or obtain the power control bit through MAC layer control information according to the power control mode, where different codes of the power control bit indicate different adjusted PUSCH or PUCCH power amplitudes, so as to increase more power adjustment levels, thereby greatly adjusting the terminal transmit power, ensuring uplink coverage quality, and improving network quality.
During Data transmission in LTE, TB Size is determined according to coverage, Size of a Data packet, and network resources, after the TB Size is determined, the length of a MAC PDU (Protocol Data Unit) is determined, and then Data of a MAC Header, a MAC CE (control Unit), and a logical channel are multiplexed on the MAC PDU, but the length of the Data is usually smaller than that of the MAC PDU, and extra bytes need to be filled, and the filling is PADDING. The method and the device can improve the utilization efficiency of network resources by utilizing the PADDING power control bit of the MAC layer.
Fig. 6 is a schematic structural diagram of an embodiment of a terminal of the present disclosure. The terminal comprises a signaling receiving unit 610, a sending mode judging unit 620, a power control bit obtaining unit 630 and a power adjusting unit 640, wherein:
the signaling receiving unit 610 is configured to receive an RRC reconfiguration signaling sent by the base station, where the RRC reconfiguration signaling includes a power control mode. When a service is established, the network side carries PCM through RRC reconfiguration information, where the PCM is used to indicate a transmission mode of power control information, and for example, if the PCM is 0, a power control bit is transmitted in a PDCCH; the PCM is 1, the power control bit is transmitted in the MAC control information.
The transmission manner judging unit 620 is configured to determine whether the base station transmits the power control bit through the MAC layer control information according to the power control mode, i.e., judge whether the PCM is 0 or 1.
The power control bit obtaining unit 630 is configured to obtain the power control bit through the downlink MAC layer control information if the base station sends the power control bit through the MAC layer control information.
The power control bit obtaining unit 630 is further configured to, if the base station does not send the power control bit through the MAC layer control information, obtain the power control bit through the DCI of the PDCCH.
The power adjusting unit 640 is configured to adjust the terminal transmission power according to the power control bits.
In the above embodiment, the terminal may obtain the power control bit through the downlink MAC layer control information, and the length of the power control information is increased, so that when the wireless signal is faded fast, the transmission power of the terminal may be raised fast, and the PDCCH resource occupation is saved.
In another embodiment of the present disclosure, when a service is established, the base station configures a power control mode through RRC reconfiguration signaling, for example, if the service is an asymmetric service, such as BE service, PCM is 0, and the identification PCB is transmitted through PDCCH; if the service is a symmetric service, such as VoLTE service, the PCM is 1, and the identification PCB is transmitted in the MAC control information, where the PCB is multiplexed in the DL-SCH at the MAC layer for transmission. The power control bit obtaining unit 630 is further configured to obtain the power control bit through DCI of the PDCCH if the service is an asymmetric service, for example, obtain the power control bit through DCI of the PDCCH in an mth subframe of the downlink data; if the service is a symmetric service, the power control bit is obtained through the MAC layer control information, for example, the power control bit is obtained through the MAC layer control information in the mth subframe of the downlink data.
The power adjusting unit 640 is configured to adjust PUSCH or PUCCH power according to the power control bit in the m +4 th subframe of the downlink data. The specific meaning of PCB is shown in fig. 5, and different codes indicate that the adjusted PUSCH or PUCCH power amplitude is different.
In this embodiment, the base station configures a power control mode through RRC signaling, and the terminal determines whether to obtain a power control bit through DCI of the PDCCH or obtain the power control bit through MAC layer control information according to the power control mode, where different codes of the power control bit indicate different adjusted PUSCH or PUCCH power amplitudes, so as to increase more power adjustment levels, thereby greatly adjusting the terminal transmit power, ensuring uplink coverage quality, and improving network quality.
Fig. 7 is a schematic structural diagram of an embodiment of a power control system of the present disclosure. The system comprises a base station 710 and a terminal 720, wherein the base station 710 carries a power control mode in an RRC reconfiguration signaling, for example, if the service is an asymmetric service, such as a BE service, the PCM is 0, and the identification PCB is sent through a PDCCH; if the service is a symmetric service, such as VoLTE service, the PCM is 1, and the identification PCB is transmitted in the MAC control information, where the PCB is multiplexed in the DL-SCH at the MAC layer for transmission. The terminal 720 determines whether to acquire the power control bit through DCI of the PDCCH or the MAC layer control information according to the power control mode, and adjusts the terminal transmission power according to the power control bit.
In the above embodiment, for the symmetric service, the power control bit may be transmitted on the PDSCH in the form of MAC layer control information, and the length of the power control information is increased, so that when the radio signal is faded fast, the transmission power of the terminal may be raised fast, and the PDCCH resource occupation is saved.
Fig. 8 is a schematic structural diagram of another embodiment of the terminal of the present disclosure. Including the terminal including memory 810 and processor 820. Wherein: the memory 810 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory 810 is used to store instructions in the embodiments corresponding to fig. 1-2. Processor 820 is coupled to memory 810 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 820 is configured to execute instructions stored in the memory.
In one embodiment, as also shown in FIG. 9, the terminal 900 includes a memory 910 and a processor 920. Processor 920 is coupled to memory 910 by a BUS 930. The terminal 900 can also be coupled to an external storage device 950 via a storage interface 940 for retrieving external data, and can also be coupled to a network or another computer system (not shown) via a network interface 960, which will not be described in detail herein.
In the embodiment, the data instruction is stored in the memory, and the instruction is processed by the processor, so that when the wireless signal is rapidly faded, the transmitting power of the terminal can be rapidly increased, and the occupation of PDCCH resources is saved.
In another embodiment, a computer-readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the corresponding embodiment of fig. 1-2. As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (13)
1. A method of power control, comprising:
a terminal receives a Radio Resource Control (RRC) reconfiguration signaling sent by a base station, wherein the RRC reconfiguration signaling comprises a power control mode;
determining whether the base station transmits power control bits through Media Access Control (MAC) layer control information according to the power control mode;
if the base station sends power control bits through MAC layer control information, the terminal obtains the power control bits through downlink MAC layer control information and adjusts the transmitting power of the terminal according to the power control bits;
if the base station does not transmit the power control bit through the MAC layer control information, the terminal acquires the power control bit through downlink control information DCI of a physical downlink control channel PDCCH.
2. The method of claim 1, wherein,
if the service is an asymmetric service, the terminal acquires the power control bit through the DCI of the PDCCH;
and if the service is a symmetric service, the terminal acquires the power control bit through the MAC layer control information.
3. The method of claim 1 or 2,
and the terminal acquires the power control bit through MAC layer control information in the mth subframe of the downlink data, and adjusts the power of a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) in the (m + 4) th subframe of the downlink data according to the power control bit.
4. The method of claim 1 or 2,
the power control bits are transmitted in a MAC layer multiplexed into a downlink shared channel DL-SCH.
5. The method of claim 1 or 2,
and different coded identifications of the power control bits are different in amplitude for adjusting the transmitting power of the terminal.
6. A terminal, comprising:
a signaling receiving unit, configured to receive a radio resource control RRC reconfiguration signaling sent by a base station, where the RRC reconfiguration signaling includes a power control mode;
a sending judgment unit, configured to determine whether the base station sends the power control bit through the MAC layer control information according to the power control mode;
a power control bit obtaining unit, configured to obtain a power control bit through downlink MAC layer control information if the base station sends the power control bit through MAC layer control information; if the base station does not transmit the power control bit through the MAC layer control information, acquiring the power control bit through downlink control information DCI of a physical downlink control channel PDCCH;
and the power adjusting unit is used for adjusting the transmitting power of the terminal according to the power control bit.
7. The terminal of claim 6, wherein,
the power control bit obtaining unit is further configured to obtain the power control bit through DCI of the PDCCH if the service is an asymmetric service; and if the service is a symmetric service, acquiring the power control bit through the MAC layer control information.
8. The terminal of claim 6 or 7,
the power control bit acquisition unit is used for acquiring the power control bit through MAC layer control information in the mth subframe of the downlink data;
and the power adjusting unit is used for adjusting the power of a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH) in the (m + 4) th subframe of the downlink data according to the power control bit.
9. The terminal of claim 6 or 7,
the power control bits are transmitted in a MAC layer multiplexed into a downlink shared channel DL-SCH.
10. The terminal of claim 6 or 7,
and different coded identifications of the power control bits are different in amplitude for adjusting the transmitting power of the terminal.
11. A power control system comprising a base station and a terminal as claimed in any one of claims 6 to 10.
12. A terminal, comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of any of claims 1-5 based on instructions stored in the memory.
13. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any one of claims 1 to 5.
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| CN201711018700.3A CN109729576B (en) | 2017-10-27 | 2017-10-27 | Power control method, system and terminal |
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| CN201711018700.3A CN109729576B (en) | 2017-10-27 | 2017-10-27 | Power control method, system and terminal |
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| KR20060023870A (en) * | 2004-09-10 | 2006-03-15 | 삼성전자주식회사 | Mobile communication system and method for controlling a transmission power of access data by mobile terminal |
| KR100978787B1 (en) * | 2006-06-16 | 2010-08-30 | 삼성전자주식회사 | Method and apparatus for controlling power in a communication system |
| WO2008113022A1 (en) * | 2007-03-14 | 2008-09-18 | Magnolia Broadband Inc. | Method, apparatus and system for providing transmit diversity feedback |
| CN101677255B (en) * | 2008-09-19 | 2013-02-27 | 中兴通讯股份有限公司 | Power control parameter transfer method, device and terminal |
| JP2017539135A (en) * | 2014-11-06 | 2017-12-28 | 富士通株式会社 | Power control mode for D2D synchronization signal |
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| Title |
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| Power Sharing Mechanisms with LTE-NR DC and NR;InterDigital等;《3GPP TSG RAN WG1#90 R1-1714118》;20170811;全文 * |
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