CN108540277B - Method for determining transmission power and terminal equipment - Google Patents

Method for determining transmission power and terminal equipment Download PDF

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CN108540277B
CN108540277B CN201810203156.8A CN201810203156A CN108540277B CN 108540277 B CN108540277 B CN 108540277B CN 201810203156 A CN201810203156 A CN 201810203156A CN 108540277 B CN108540277 B CN 108540277B
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prb
determining
terminal device
power
terminal equipment
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CN108540277A (en
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曾捷
粟欣
肖驰洋
王畅
刘蓓
王京
许希斌
赵明
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Tsinghua University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • 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
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission

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  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a method for determining transmission power and terminal equipment, which are used for determining the transmission power of the terminal equipment on an occupied PRB in a plurality of terminal equipment for signal superposition transmission. The method comprises the following steps: the terminal equipment estimates the channel gain of the occupied physical resource block PRB according to the pilot frequency information; determining target receiving power of network equipment of uplink signals on the PRB; and determining the transmission power of the terminal equipment on the PRB according to the channel gain and the target receiving power.

Description

Method for determining transmission power and terminal equipment
Technical Field
The present application relates to the field of communications, and in particular, to a method for determining transmit power and a terminal device.
Background
As the number of mobile users increases, the demand of users for higher quality of service and larger data volume increases, and the corresponding demand for bandwidth increases. The existing orthogonal multiple access technology requires users to perform orthogonal transmission in time domain, frequency domain, code domain and the like, limits the access number of users to a certain extent, and influences the further improvement of the system frequency spectrum utilization rate.
Under the novel multiple access technology, a plurality of user signals are superposed on the same physical resource at a transmitting end, and a corresponding demodulation algorithm is adopted at a receiving end to realize information separation of users, so that the purposes of improving the frequency spectrum utilization rate of a system and increasing the number of access users are realized. The main multiple access technologies at present include a pattern segmentation multiple access (PDMA) technology based on a characteristic pattern, a non-orthogonal multiple access (NOMA) technology based on power superposition, a sparse code division multiple access (SCMA) technology based on sparse coding and the like.
In the PDMA system, the signature pattern is a vector consisting of "0" and "1", which determines on which physical resource blocks the user signals are transmitted, and the user can map the physical resource blocks according to the assigned signature pattern. In the uplink PDMA system, in order to ensure user fairness, it is necessary to ensure that the power received by the network device by each user is consistent among multiple users transmitting signals in a superimposed manner.
Disclosure of Invention
The embodiment of the application provides a method for determining transmission power and terminal equipment, which are used for determining the transmission power of the terminal equipment on an occupied PRB in a plurality of terminal equipment for signal superposition transmission.
The embodiment of the application adopts the following technical scheme:
in a first aspect, a method for determining transmit power is provided, including: the terminal equipment estimates the channel gain of the occupied physical resource block PRB according to the pilot frequency information; determining target receiving power of network equipment of uplink signals on the PRB; and determining the transmission power of the terminal equipment on the PRB according to the channel gain and the target receiving power.
In a second aspect, a terminal device is provided, which includes: the estimation module is used for estimating the channel gain of the occupied physical resource block PRB according to the pilot frequency information; a determining module, configured to determine a target received power of a network device of an uplink signal on the PRB; and the transmission power determining module is used for determining the transmission power of the terminal equipment on the PRB according to the channel gain and the target receiving power.
In a third aspect, a terminal device is provided, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the first aspect.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects: the terminal equipment estimates the channel gain of the occupied PRB according to the pilot frequency information, determines the target receiving power of the network equipment on the PRB, and can determine the transmitting power on the PRB according to the channel gain and the target receiving power.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic flowchart illustrating an implementation of a method for determining transmit power according to an embodiment of the present application;
fig. 2 is a schematic application scenario diagram of a method for determining transmission power according to an embodiment of the present application;
fig. 3 is a schematic flow chart illustrating an implementation of a method for determining transmit power according to another embodiment of the present application;
fig. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a terminal device according to another embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS) or a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a 5G System, or a New Radio (NR) System.
In the embodiment of the present invention, the Terminal device may include, but is not limited to, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Mobile phone (Mobile Telephone), a User Equipment (UE), a handset (handset), a portable device (portable Equipment), a vehicle (vehicle), etc., and the Terminal device may communicate with one or more core networks through a Radio Access Network (RAN), for example, the Terminal device may be a Mobile phone (or referred to as a "cellular" phone), a computer with a wireless communication function, and the Terminal device may also be a portable, pocket, handheld, computer-embedded, or vehicle-mounted Mobile apparatus.
In the embodiment of the present invention, the network device is a device deployed in a radio access network to provide a wireless communication function for a terminal device. The network device may be a base station, and the base station may include various macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of devices having a base station function may differ. For example in NR networks, called gnb (NR nodeb); in LTE networks, referred to as Evolved node bs (enbs or enodebs); in a third Generation (3G) network, called node b (nodeb), etc.
Referring to fig. 1 and fig. 2, an embodiment of the present invention provides a method for determining transmit power, as shown in fig. 1, including the following steps:
s101: the terminal device estimates a channel gain of a Physical Resource Block (PRB) occupied according to the pilot information.
As shown in fig. 2, the network device (fig. 2 takes a base station as an example) may broadcast pilot information to terminal devices (users in fig. 2) within a signal coverage area, so that the terminal devices may determine a channel gain on each PRB according to the received pilot information.
In this embodiment, the network device may broadcast and transmit the pilot information on all subcarriers at equal power.
In general, the frequency of each PRB is different, and due to the frequency selectivity caused by multipath, the channel gain on each PRB is usually not equal, so in this step, the terminal device may estimate the channel gain of one or more occupied PRBs according to the pilot information.
S102: determining target receiving power of network equipment of uplink signals on the PRB;
the network device in this step corresponds to the terminal device, and when the target received power of the network device on the PRB is specifically determined, the number M of PRBs allocated by the network device to the terminal device may be determined firstk(ii) a Then according to the preset receiving power Pr and the M aiming at the terminal equipmentkDetermines a target received power on the PRB
Figure BDA0001595106900000041
Preferably, as an embodiment, the number M of PRBs allocated to the terminal device is determinedkSpecifically, the number M of PRBs allocated to the terminal device may be determined according to a sum of elements in the characteristic pattern of the terminal devicek. For example, if the characteristic pattern of the terminal device is a one-dimensional vector (101) including three elements, it may indicate that the terminal device occupies the first and third PRBs, i.e. the number of occupied PRBs is 2.
S103: and determining the transmission power of the terminal equipment on the PRB according to the channel gain and the target receiving power.
Preferably, the step may specifically determine the transmission power of the terminal device numbered k on the PRB numbered n according to the following formula;
Figure BDA0001595106900000051
wherein, Ptk,nIs the transmission power of the terminal equipment with the number k on the PRB with the number n;
Pk(n) is a characteristic map sample value of the terminal equipment with the number k on the PRB with the number n;
Figure BDA0001595106900000052
target received power of the network equipment on PRB numbered n;
Gnis the channel gain over the PRB number n.
According to the method for determining the transmission power, provided by the embodiment of the invention, the terminal equipment estimates the channel gain of the occupied PRB according to the pilot frequency information, determines the target receiving power of the network equipment on the PRB, and can determine the transmission power on the PRB according to the channel gain and the target receiving power.
To describe the method for determining the transmit power according to the embodiment of the present invention in detail, the following description is made with reference to a specific embodiment.
Before the embodiment is performed, the network device may first determine that the total number of terminal devices in the system is K, the bandwidth allocated to the terminal device by the network device is N PRBs, and the total transmission power of the network device is Pt0The expected received power for each terminal device is Pr, and then the network device can have the total power Pt0Pilot information is broadcast to all terminal devices in the system at equal power on all subcarriers.
As shown in fig. 3, after receiving the pilot information, the terminal device may determine the transmission power of each terminal device on each occupied PRB according to the following steps, and finally ensure that the power of each terminal device received by the network device is equal, so as to embody the fairness of users under the system:
s301: the terminal equipment K (K is more than or equal to 1 and less than or equal to K) estimates the occupied information on each PRB according to the received pilot frequency informationChannel gain GnWherein N is more than or equal to 1 and less than or equal to N.
S302: the terminal device k is according to its own characteristic pattern PkDetermining the number M of occupied PRBsk，Mk＝sum(Pk) Where sum (a) represents summing all elements in vector a;
s303: the terminal equipment receives power Pr according to the presetting and occupies the quantity M of PRBskDetermining a target received power of the network device on each PRB
Figure BDA0001595106900000061
Wherein the content of the first and second substances,
Figure BDA0001595106900000062
s304: the terminal equipment k determines the transmission power Pt on each PRB according to the channel gain and the target receiving powerk,n，
Figure BDA0001595106900000063
Wherein, Ptk,nIs the transmission power of the terminal equipment with the number k on the PRB with the number n;
Pk(N) is the characteristic pattern sample of the terminal equipment with the number k on the PRB with the number N, the characteristic pattern of the terminal equipment on the N PRBs is a vector of 1 × N, and the characteristic pattern is mapped on the nth PRB and is Pk(n)；
Figure BDA0001595106900000064
Target received power of the network equipment on PRB numbered n;
Gnis the channel gain over the PRB number n.
The embodiment of the invention determines the sending power of the terminal equipment based on the user characteristic pattern, firstly sends pilot frequency information through the network equipment based on the idea of open loop power control, estimates the channel gain on the occupied PRB by the terminal equipment, and then calculates the sending power of each terminal equipment on each occupied PRB through the target receiving power, thereby effectively ensuring that the power of each terminal equipment received by the network equipment is equal.
As shown in fig. 4, an embodiment of the present invention further provides a network device, including:
an estimating module 401, configured to estimate, according to the pilot information, a channel gain of an occupied physical resource block PRB;
a determining module 402, configured to determine a target received power of a network device of an uplink signal on the PRB;
a transmission power determining module 403, configured to determine, according to the channel gain and the target received power, a transmission power of the terminal device on the PRB.
Optionally, as an embodiment, the transmission power determining module 403 determines the transmission power of the terminal device numbered k on the PRB numbered n according to the following formula;
Figure BDA0001595106900000065
wherein, Ptk,nIs the transmission power of the terminal equipment with the number k on the PRB with the number n;
Pk(n) is a characteristic map sample value of the terminal equipment with the number k on the PRB with the number n;
Figure BDA0001595106900000071
target received power of the network equipment on PRB numbered n;
Gnis the channel gain over the PRB number n.
Optionally, as an embodiment, the determining module 402 is configured to determine the number M of PRBs allocated to the terminal devicek(ii) a According to preset received power Pr and MkDetermining a target received power of the network equipment of the uplink signal on the PRB
Figure BDA0001595106900000072
Alternatively, as one embodiment, the determining module 402 is usedDetermining the number M of PRBs allocated to the terminal device according to the sum of elements in the terminal device characteristic patternk。
The terminal device according to the embodiment of the present invention may refer to the flow corresponding to the method according to the embodiment of the present invention, and each module and the other operations and/or functions in the terminal device are respectively for implementing the corresponding flow in the method embodiment shown in fig. 1 to fig. 3, and for brevity, no further description is given here.
Fig. 5 is a block diagram of a terminal device of another embodiment of the present invention. The terminal device 500 shown in fig. 5 includes: at least one processor 501, memory 502, at least one network interface 504, and a user interface 503. The various components in the terminal device 500 are coupled together by a bus system 505. It is understood that the bus system 505 is used to enable connection communications between these components. The bus system 505 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 505 in FIG. 5.
The user interface 503 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.
It is to be understood that the memory 502 in embodiments of the present invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data rate Synchronous Dynamic random access memory (ddr SDRAM ), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct memory bus RAM (DRRAM). The memory 502 of the subject systems and methods described in connection with the embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.
In some embodiments, memory 502 stores elements, executable modules or data structures, or a subset thereof, or an expanded set thereof as follows: an operating system 5021 and application programs 5022.
The operating system 5021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application 5022 includes various applications, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. The program for implementing the method according to the embodiment of the present invention may be included in the application program 5022.
In this embodiment of the present invention, the terminal device 500 further includes: a computer program stored on a memory 502 and executable on a processor 501, the computer program, when executed by the processor 501, implementing the steps of the method embodiments shown in fig. 1 to 3 described above.
The method disclosed by the above-mentioned embodiments of the present invention may be applied to the processor 501, or implemented by the processor 501. The processor 501 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 501. The Processor 501 may be a general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 502, and the processor 501 reads the information in the memory 502 and performs the steps of the above method in combination with the hardware thereof. In particular, the computer readable storage medium has stored thereon a computer program, which when executed by the processor 501, performs the steps of the embodiments of the method 100 as described above.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described in this disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this disclosure. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
The terminal device 500 can implement the processes implemented by the terminal device in the foregoing embodiments, and in order to avoid repetition, the descriptions are omitted here.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the method embodiments shown in fig. 1 to 3, and can achieve the same technical effect, and is not described herein again to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (8)

1. A method for determining transmit power, comprising:
the terminal equipment estimates the channel gain of the occupied physical resource block PRB according to the pilot frequency information;
determining target receiving power of network equipment of uplink signals on the PRB;
determining the transmission power of the terminal equipment with the number k on the PRB with the number n according to the following formula;
Figure FDA0002593868730000011
wherein, Ptk,nIs the transmission power of the terminal equipment with the number k on the PRB with the number n;
Pk(n) is a characteristic map sample value of the terminal equipment with the number k on the PRB with the number n;
Figure FDA0002593868730000012
target received power of the network equipment on PRB numbered n;
Gnis the channel gain over the PRB number n.
2. The method of claim 1, wherein determining a target received power of a network device for an uplink signal on the PRB comprises:
determining the number M of PRBs allocated to the terminal devicek；
According to preset received power Pr and MkDetermining the target receiving power of the network equipment of the uplink signal on the PRB.
3. The method of claim 2,
the pilot frequency information is transmitted by the network equipment through equal-power broadcasting on all subcarriers.
4. The method according to claim 2, wherein the number M of PRBs allocated to the terminal device is determinedkThe method comprises the following steps of (1),
determining the number M of PRBs allocated to the terminal equipment according to the sum of elements in the terminal equipment characteristic patternk。
5. A terminal device, comprising:
the estimation module is used for estimating the channel gain of the occupied physical resource block PRB according to the pilot frequency information;
a determining module, configured to determine a target received power of a network device of an uplink signal on the PRB;
a transmission power determining module, configured to determine, according to the following formula, transmission power of a terminal device numbered k on a PRB numbered n;
Figure FDA0002593868730000021
wherein, Ptk,nIs the transmission power of the terminal equipment with the number k on the PRB with the number n;
Pk(n) is a characteristic map sample value of the terminal equipment with the number k on the PRB with the number n;
Figure FDA0002593868730000022
target received power of the network equipment on PRB numbered n;
Gnis the channel gain over the PRB number n.
6. The terminal device of claim 5, wherein the determining module is configured to determine the number M of PRBs allocated to the terminal devicek；
According to preset received power Pr and MkDetermining the target receiving power of the network equipment of the uplink signal on the PRB.
7. The terminal device of claim 6, wherein the determining module is configured to determine the number M of PRBs allocated to the terminal device according to a sum of elements in the terminal device characteristic patternk。
8. A terminal device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the method according to any one of claims 1 to 4.
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CN104219528A (en) * 2014-09-09 2014-12-17 南京大学 Video transmission method of MIMO (multiple input multiple output) system supporting scalable video coding

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US9432950B2 (en) * 2014-03-06 2016-08-30 Mediatek Inc. Method for transmission power shaping and communications apparatus utilizing the same
KR20160096798A (en) * 2015-02-05 2016-08-17 한국전자통신연구원 Method for controlling transmission power in device-to-device communication and apparatus thereof

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CN101801078A (en) * 2003-02-19 2010-08-11 高通股份有限公司 Controlled superposition coding in multi-user comm
CN104219528A (en) * 2014-09-09 2014-12-17 南京大学 Video transmission method of MIMO (multiple input multiple output) system supporting scalable video coding

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