WO2018028661A1

WO2018028661A1 - Method for calculating power headroom of transmitter, and user equipment thereof

Info

Publication number: WO2018028661A1
Application number: PCT/CN2017/097031
Authority: WO
Inventors: 张萌; 刘仁茂
Original assignee: 夏普株式会社; 张萌
Priority date: 2016-08-12
Filing date: 2017-08-11
Publication date: 2018-02-15
Also published as: CN107734625A

Abstract

The present invention provides a user equipment, a base station, and a corresponding method for calculating a power headroom of a transmitter. The method comprises: receiving configuration information from a base station, the configuration information indicating a channel type transmitted by a user equipment on a short transmission time interval (sTTI) and a channel type transmitted by the user equipment on a transmission time interval (TTI); and calculating a power headroom of a transmitter of the user equipment according to the received configuration information. The solution in the present invention resolves the problem of how to define a new PH calculation method when a UE supports both an sTTI and a TTI.

Description

Transmitter power headroom calculation method and user equipment thereof

Technical field

The present invention relates to the field of wireless communication technologies, and more particularly, to a method for calculating a transmitter power headroom under a Short Transmission Time Interval (sTTI), and a base station and a user equipment.

Background technique

Modern wireless mobile communication systems present two distinctive features. One is broadband high speed. For example, the fourth generation wireless mobile communication system has a bandwidth of up to 100 MHz and a downlink rate of up to 1 Gbps. The second is mobile internet, which promotes mobile Internet access and mobile video on demand. , emerging services such as online navigation. These two characteristics put forward high requirements for wireless mobile communication technology, including: ultra-high-rate wireless transmission, inter-region interference suppression, reliable transmission of signals in mobile, distributed/centralized signal processing, and so on.

At the 3GPP RAN 72 plenary meeting held in June 2016, a new work project was proposed (see Non-patent literature: RP-161044: New WID for LTE: Latency reduction by processing time reduction). In the project's prior study (SI), the Latency Reduction technology will support short-term TTI (sTTI) in both uplink and downlink, where 1 sTTI contains less than 14 OFDM, which can contain 2 OFDM symbols or 7 OFDM symbols, or other numbers less than 14. The downlink channel supported by the project includes a Short Physical Downlink Control Channel (sPDCCH) and a Short Physical Downlink Shared Channel (sPDSCH), and the supported uplink channel has a short-term physical uplink control channel. (Short Physical Uplink Control Channel, sPUCCH) and Short Physical Uplink Shared Channel (sPUSCH), where sPDCCH, sPDSCH, sPUCCH, and sPUSCH are physical channels with sTTI as the transmission time interval. The sPDCCH is used to transmit downlink control information, the sPUSCH is used to transmit downlink control information, and the sPUSCH is used to transmit uplink data information.

At the same time, many companies propose that the UE supports both sTTI and LTE/LTE-A TTI of Latency reduction, where the TTI time length of LTE/LTE-A includes 14 OFDM symbols. In the present invention, TTI refers to a subframe or transmission time interval of LTE/LTE-A with a duration of 1 ms and including 14 OFDM symbols; sTTI refers to a duration of less than 1 ms and contains less than 14 OFDM symbols. Subframe or transmission time interval, which may contain 2 OFDM symbols or 7 OFDM symbols, or other numbers less than 14.

In the existing LTE-A, there are two types of power headroom (PH) calculation methods. The calculation method of the first type of PH is to calculate the difference between the maximum transmit power of the UE and the power of the PUSCH; the calculation method of the second type of PH is to calculate the difference between the maximum transmit power of the UE and the sum of the PUCCH and the PUSCH. However, with the introduction of sPUCCH and sPUSCH, a new method of calculating PH is needed.

The problem solved by the present invention is how to define a new PH calculation method and its feedback method when the UE supports both sTTI and TTI.

Summary of the invention

Embodiments of the present invention provide a transmitter power headroom calculation method and user equipment and base station thereof to solve at least some of the above problems.

According to an aspect of the present invention, a method for transmitter power headroom calculation includes: receiving configuration information from a base station, the configuration information indicating a channel type transmitted by a user equipment on a short-term transmission time interval sTTI and a channel type transmitted by the user equipment on a transmission time interval TTI; and calculating a transmitter power margin of the user equipment according to the received configuration information.

According to another aspect of the present invention, a method for transmitter power headroom calculation is provided, comprising: generating configuration information indicating a channel type and a channel type transmitted by a user equipment on a short-term transmission time interval sTTI Determining, by the user equipment, the channel type transmitted on the transmission time interval TTI; and transmitting the configuration information to the user equipment, to calculate, by the user equipment, a transmitter power margin of the user equipment according to the configuration information.

According to another aspect of the present invention, a user equipment is provided, including: a receiver, for Receiving configuration information from the base station, the configuration information indicating a channel type transmitted by the user equipment on the short-term transmission time interval sTTI and a channel type transmitted by the user equipment on the transmission time interval TTI; and a margin calculation unit for The received configuration information calculates a transmitter power margin of the user equipment.

According to still another aspect, a base station is provided, including: a configuration information generating unit, configured to generate configuration information, where the configuration information indicates a channel type transmitted by a user equipment on a short-term transmission time interval sTTI, and the user equipment is transmitting a channel type transmitted on the time interval TTI; and a transmitter, configured to send the configuration information to the user equipment, to calculate, by the user equipment, a transmitter power margin of the user equipment according to the configuration information.

The above solution of the present invention at least solves the problem of how to define a new PH calculation method when the UE supports sTTI and TTI at the same time.

DRAWINGS

The above and other features of the present invention will become more apparent from the detailed description of the appended claims.

FIG. 1 is a schematic diagram showing a margin calculation scheme according to an embodiment of the present invention; FIG.

2 shows a simplified block diagram of a user equipment in accordance with an embodiment of the present invention;

Figure 3 shows a simplified block diagram of a base station in accordance with an embodiment of the present invention.

detailed description

The invention is described in detail below with reference to the drawings and specific embodiments. It should be noted that the present invention should not be limited to the specific embodiments described below. In addition, detailed descriptions of well-known techniques that are not directly related to the present invention are omitted for the sake of brevity to prevent confusion of the understanding of the present invention.

The following describes various embodiments in accordance with the present invention with the LTE mobile communication system and its subsequent evolved versions as example application environments. However, it should be noted that the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as future 5G cellular communication systems.

In the present invention, TTI refers to a subframe or transmission time interval of LTE/LTE-A with a duration of 1 ms and including 14 OFDM symbols; sTTI refers to a duration of less than 1 ms and contains less than 14 OFDM symbols. Subframe or transmission time interval, which may contain 2 OFDM symbols or 7 OFDM symbols, or other numbers less than 14.

Simultaneous transmission of sTTI and TTI means that the two overlap or partially coincide in time. For example, the sTTI subframe with the sequence number k and the TTI subframe with the sequence number i are temporally coincident or partially coincident, that is, the sTTI and the TTI are simultaneously transmitted. Where i and k can be the same value or different values.

FIG. 1 shows a schematic diagram of a PH generation scheme in accordance with an embodiment of the present invention. It should be noted that although the method is shown in FIG. 1 in the form of information exchange between the base station and the user equipment, FIG. 1 may be divided into operations (methods) respectively shown in the base station and in the user equipment. Two different flow charts. . As shown, the method includes the following steps.

Step s201: The base station generates configuration information, indicating a channel type that the UE transmits on the sTTI and a channel type that the UE transmits on the TTI.

Step s202: The base station sends configuration information to the UE, so that the UE calculates the transmitter power headroom (PH) according to the configuration information.

Step s101: The UE receives configuration information sent by the base station.

Step s102: The UE calculates the PH according to the configuration information.

As an embodiment of the foregoing step s102, the configuration information may be used to indicate that the UE transmits the sPUSCH on the sTTI and the UE transmits the PUSCH on the TTI. sTTI is transmitted simultaneously with TTI.

At this time, the PH is calculated as follows

PH=P _CMAX,c (i)-P _PUSCH,c (i)-P _sPUSCH,c (k),

Where P _CMAX,c (i) is the maximum transmit power of the UE at the i-th subframe of the serving cell c;

P _PUSCH,c (i) is the PUSCH transmit power of the UE at the i-th TTI subframe of the serving cell c, or the unpunctured PUSCH transmit power of the UE at the i-th subframe of the serving cell c;

P _sPUSCH,c (k) is the sPUSCH transmission power of the UE at the kth sTTI subframe of the serving cell c.

As an embodiment of the foregoing step s102, the configuration information is used to indicate that the UE transmits the s PUCCH on the sTTI and the UE transmits the PUSCH on the TTI. sTTI is transmitted simultaneously with TTI.

At this time, the PH is calculated as follows

PH=P _CMAX,c (i)-P _PUSCH,c (i)-P _sPUCCH,c (k),

P _sPUCCH,c (k) is the s PUCCH transmission power of the UE at the kth sTTI subframe of the serving cell c.

As an embodiment of the foregoing step s102, the configuration information is used to indicate that the UE transmits the sPUSCH on the sTTI and the UE transmits the PUCCH on the TTI. sTTI is transmitted simultaneously with TTI.

At this time, the PH is calculated as follows

PH=P _CMAX,c (i)-P _PUCCH,c (i)-P _sPUSCH,c (k),

P _PUCCH,c (i) is the PUCCH transmit power of the UE at the i-th TTI subframe of the serving cell c, or the unpunctured PUCCH transmit power of the UE at the i-th subframe of the serving cell c;

As an embodiment of the foregoing step s102, the configuration information is used to indicate that the UE transmits the sPUCCH on the sTTI and the UE transmits the PUCCH on the TTI. sTTI is transmitted simultaneously with TTI.

At this time, the PH is calculated as follows

PH=P _CMAX,c (i)-P _PUCCH,c (i)-P _sPUCCH,c (k),

As an embodiment of the foregoing step s102, the configuration information is used to indicate that the UE transmits the sPUCCH and the sPUSCH on the sTTI and the UE transmits the PUSCH on the TTI. sTTI is transmitted simultaneously with TTI.

At this time, the PH is calculated as follows

PH=P _CMAX,c (i)-P _PUSCH,c (i)-P _sPUCCH,c (k)-P _sPUSCH,c (k),

P _sPUCCH,c (k) is the sPUCCH transmit power of the UE at the kth sTTI subframe of the serving cell c;

As an embodiment of the foregoing step s102, the configuration information is used to indicate that the UE transmits the sPUCCH and the sPUSCH on the sTTI and the UE transmits the PUCCH on the TTI. sTTI is transmitted simultaneously with TTI.

At this time, the PH is calculated as follows

PH=P _CMAX,c (i)-P _PUCCH,c (i)-P _sPUCCH,c (k)-P _sPUSCH,c (k),

As an embodiment of the foregoing step s102, the configuration information is used to indicate that the UE transmits the sPUSCH on the sTTI and the UE transmits the PUSCH and the PUCCH on the TTI. sTTI is transmitted simultaneously with TTI.

At this time, the PH is calculated as follows

PH=P _CMAX,c (i)-P _PUSCH,c (i)-P _PUCCH,c (i)-P _sPUSCH,c (k),

As an embodiment of the foregoing step s102, the configuration information is used to indicate that the UE transmits the s PUCCH on the sTTI and the UE transmits the PUSCH and the PUCCH on the TTI. sTTI is transmitted simultaneously with TTI.

At this time, the PH is calculated as follows

PH=P _CMAX,c (i)-P _PUSCH,c (i)-P _PUCCH,c (i)-P _sPUCCH,c (k),

P _PUSCH,c (i) is the transmit power of the PUSCH of the UE in the i-th TTI subframe of the serving cell c, or the transmit power of the PUSCH that is not punctured by the UE in the i-th subframe of the serving cell c

P _PUCCH,c (i) is the transmit power of the PUCCH of the UE in the i-th TTI subframe of the serving cell c, or the transmit power of the unpunctured PUCCH of the UE in the i-th subframe of the serving cell c

As an embodiment of the foregoing step s102, the configuration information is used to indicate that the UE transmits the sPUSCH and the sPUCCH on the sTTI and the UE transmits the PUSCH and the PUCCH on the TTI. sTTI is transmitted simultaneously with TTI.

At this time, the PH is calculated as follows

PH=P _CMAX,c (i)-P _PUSCH,c (i)-P _PUCCH,c (i)-P _sPUSCH,c (k)-P _sPUCCH,c (k),

P _sPUSCH,c (k) is the sPUSCH transmit power of the UE at the kth sTTI subframe of the serving cell c;

After step s102:

Step s103: The UE generates a message indicating the power headroom calculated in step s102 according to the PH. In some examples, for example, a PHR MAC Control Element or other existing or newly defined control unit/message may be generated. The generation of the PHR MAC Control Element may be performed by any means used in the prior art to generate the corresponding control unit, and details are not described herein again.

Step s104: The UE sends the generated message to the base station, for example, sends a PHR MAC Control Element.

The present invention also provides a user equipment and a base station for performing the above method, as shown in Figures 2 and 3, respectively. It is to be noted that Figures 2 and 3 are merely schematic block diagrams illustrating the schematic implementation of the present invention at the user equipment and base station, and for the sake of clarity only the components/components relating to the description of the present invention are shown. In particular implementations, other components/components that are commonly used or conceivable to those skilled in the art may also be included.

FIG. 2 shows a schematic simplified block diagram of a user equipment in accordance with an embodiment of the present invention. The user equipment includes: a receiver 310, configured to receive configuration information from a base station, where the configuration information indicates a channel type that the user equipment transmits on the sTTI and a channel type that the user equipment transmits on the TTI; and the remaining amount calculation unit 320 uses And calculating, according to the received configuration information, a transmitter power margin of the user equipment.

The user equipment can also include a message generation unit 330 for generating a message indicating the transmitter power headroom, and a transmitter 340 for transmitting the generated message to the base station.

The user device may also include a memory 350 for storing information and data that the user device needs and/or generates in operation.

Specifically, the margin calculation unit 320 may be configured to: when the sTTI is transmitted simultaneously with the TTI, subtract the transmit power of each channel sent at the subframe on the sTTI from the maximum transmit power of the user equipment at the subframe of the serving cell. And the transmit power of each channel transmitted at the subframe on the TTI. For example, the transmitter power margin of the user equipment may be calculated according to the solution of each embodiment of the foregoing step s102, and details are not described herein again.

FIG. 3 shows a schematic simplified block diagram of a base station in accordance with an embodiment of the present invention. The base station includes: a configuration information generator 410, configured to generate configuration information indicating a channel type transmitted by the user equipment on the sTTI and a channel type transmitted by the user equipment on the TTI; and a transmitter 420 for using the user equipment The configuration information is sent to calculate, by the user equipment, the transmitter power margin of the user equipment according to the configuration information.

The base station can also include a receiver 430 for receiving a message sent by the user equipment indicating its transmitter power margin.

The user equipment may also include a memory 440 for storing information and data that the base station needs and/or generates in operation.

The method and apparatus of the present invention have been described above in connection with the preferred embodiments. Those skilled in the art will appreciate that the methods shown above are merely exemplary. The method of the present invention is not limited to the steps and sequences shown above. The network nodes and user equipment shown above may include more modules, for example, may also include modules that may be developed or developed in the future for base stations, MMEs, or UEs, and the like. The various logos shown above are merely exemplary and not limiting, and the invention is not limited to specific cells as examples of such identifications. Many variations and modifications can be made by those skilled in the art in light of the teachings of the illustrated embodiments.

It should be understood that the above-described embodiments of the present invention can be implemented by software, hardware, or a combination of both software and hardware. For example, the base station and various components within the user equipment in the above embodiments may be implemented by various devices including, but not limited to, analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, and programmable processing. , Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), and more.

In the present application, "base station" refers to a mobile communication data and control switching center having a large transmission power and a relatively large coverage area, including resource allocation scheduling, data reception and transmission, and the like. "User equipment" refers to a user mobile terminal, for example, a terminal device including a mobile phone, a notebook, etc., which can perform wireless communication with a base station or a micro base station.

Moreover, embodiments of the invention disclosed herein may be implemented on a computer program product. More specifically, the computer program product is a product having a computer readable medium encoded with computer program logic that, when executed on a computing device, provides related operations to implement The above technical solution of the present invention. When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present invention. Such an arrangement of the present invention is typically provided as software, code and/or other data structures, or such as one or more, that are arranged or encoded on a computer readable medium such as an optical medium (e.g., CD-ROM), floppy disk, or hard disk. Firmware or microcode of other media on a ROM or RAM or PROM chip, or downloadable software images, shared databases, etc. in one or more modules. Software or firmware or such a configuration may be installed on the computing device such that one or more processors in the computing device perform the technical solutions described in the embodiments of the present invention.

Furthermore, each functional module or individual feature of the base station device and the terminal device used in each of the above embodiments may be implemented or executed by circuitry, typically one or more integrated circuits. Circuitry designed to perform the various functions described in this specification can include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs) or general purpose integrated circuits, field programmable gate arrays (FPGAs), or others. Program logic, discrete gate or transistor logic, or discrete hardware components, or any combination of the above. A general purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The above general purpose processor or each circuit may be configured by a digital circuit or may be configured by a logic circuit. Further, when advanced technologies capable of replacing current integrated circuits have emerged due to advances in semiconductor technology, the present invention can also use integrated circuits obtained by using the advanced technology.

The program running on the device according to the present invention may be a program that causes a computer to implement the functions of the embodiments of the present invention by controlling a central processing unit (CPU). The program or information processed by the program may be temporarily stored in a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memory system.

A program for realizing the functions of the embodiments of the present invention can be recorded on a computer readable recording medium. The corresponding functions can be realized by causing a computer system to read programs recorded on the recording medium and execute the programs. The so-called "computer system" herein may be a computer system embedded in the device, and may include an operating system or hardware (such as a peripheral device). "Computer can The read recording medium may be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a recording medium of a short-term dynamic storage program, or any other recording medium readable by a computer.

The various features or functional blocks of the apparatus used in the above embodiments may be implemented or executed by circuitry (e.g., monolithic or multi-chip integrated circuits). Circuitry designed to perform the functions described in this specification can include general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete Gate or transistor logic, discrete hardware components, or any combination of the above. A general purpose processor may be a microprocessor or any existing processor, controller, microcontroller, or state machine. The above circuit may be a digital circuit or an analog circuit. One or more embodiments of the present invention may also be implemented using these new integrated circuit technologies in the context of new integrated circuit technologies that have replaced existing integrated circuits due to advances in semiconductor technology.

Further, the present invention is not limited to the above embodiment. Although various examples of the embodiments have been described, the invention is not limited thereto. Fixed or non-mobile electronic devices installed indoors or outdoors can be used as terminal devices or communication devices such as AV devices, kitchen devices, cleaning devices, air conditioners, office equipment, vending machines, and other home appliances.

As above, the embodiments of the present invention have been described in detail with reference to the accompanying drawings. However, the specific structure is not limited to the above embodiments, and the present invention also includes any design modifications not departing from the gist of the present invention. In addition, various modifications may be made to the invention within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the different embodiments are also included in the technical scope of the present invention. Further, the components having the same effects described in the above embodiments may be substituted for each other.

Claims

A method for transmitter power headroom calculation, comprising:

Receiving configuration information from the base station, the configuration information indicating a channel type transmitted by the user equipment on the short-term transmission time interval sTTI and a channel type transmitted by the user equipment on the transmission time interval TTI;

And calculating a transmitter power margin of the user equipment according to the received configuration information.
The method of claim 1 further comprising:

Generating a message indicating the transmitter power headroom;

The generated message is sent to the base station.
The method of claim 1, wherein calculating the transmitter power headroom of the user equipment according to the received configuration information comprises:

When the sTTI is transmitted simultaneously with the TTI, the transmit power of each channel transmitted at the subframe on the sTTI and the subframe on the TTI are subtracted from the maximum transmit power of the user equipment at the subframe of the serving cell. The transmit power of each channel transmitted.
A method for transmitter power headroom calculation, comprising:

Generating configuration information indicating a channel type transmitted by the user equipment on the short-term transmission time interval sTTI and a channel type transmitted by the user equipment on the transmission time interval TTI;

And transmitting, to the user equipment, the configuration information, to calculate, by the user equipment, a transmitter power margin of the user equipment according to the configuration information.
A user equipment comprising:

a receiver, configured to receive configuration information from a base station, the configuration information indicating a channel type transmitted by the user equipment on a short-term transmission time interval sTTI and a channel type transmitted by the user equipment on a transmission time interval TTI;

And a balance calculation unit, configured to calculate a transmitter power margin of the user equipment according to the received configuration information.
The user equipment of claim 5, further comprising:

a message generating unit, configured to generate a message indicating the transmitter power margin;

And a transmitter, configured to send the generated message to the base station.
The user equipment according to claim 4, wherein the margin calculation unit is further configured to:

When the sTTI is transmitted simultaneously with the TTI, the transmit power of each channel transmitted at the subframe on the sTTI and the subframe on the TTI are subtracted from the maximum transmit power of the user equipment at the subframe of the serving cell. The transmit power of each channel transmitted.
A base station comprising:

a configuration information generating unit, configured to generate configuration information, where the configuration information indicates a channel type that is transmitted by the user equipment on the short-term transmission time interval sTTI and a channel type that is transmitted by the user equipment on the transmission time interval TTI;

And a transmitter, configured to send the configuration information to the user equipment, to calculate, by the user equipment, a transmitter power margin of the user equipment according to the configuration information.