CN111836252A - Power headroom reporting method, power headroom configuration method, terminal and base station - Google Patents
Power headroom reporting method, power headroom configuration method, terminal and base station Download PDFInfo
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- CN111836252A CN111836252A CN201910303235.0A CN201910303235A CN111836252A CN 111836252 A CN111836252 A CN 111836252A CN 201910303235 A CN201910303235 A CN 201910303235A CN 111836252 A CN111836252 A CN 111836252A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
- H04W8/24—Transfer of terminal data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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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
- 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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- 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
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/365—Power headroom reporting
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Abstract
A power headroom reporting method, a configuration method, a terminal and a base station are provided. The power headroom reporting method may include: reporting capability information; and reporting the power headroom according to a reporting condition corresponding to the capability information, wherein the capability information comprises: information indicating whether the terminal supports full duplex. According to the disclosure, the corresponding power headroom report can be performed according to the capability information.
Description
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a Power Headroom Report (PHR) method, a configuration method, a terminal, and a base station.
Background
According to the International Telecommunications Union (ITU), the worldwide mobile data traffic will reach 62 octets (EB, where 1EB is 2 EB) in 202030GB), and from 2020 to 2030, global mobile data services will grow at a growth rate of about 55% per year; in addition, the proportion of video traffic and machine-to-machine communication traffic in mobile data traffic will gradually increase; by 2030, video traffic will be 6 times that of non-video traffic and machine-to-machine communication traffic will account for around 12% of mobile data traffic (see the documents IMT traffic estimates for the years 2020 to 2030, Report ITU-RM.2370-0).
The rapid growth of mobile data services, especially the exponential growth of high definition video services and ultra-high definition video services, puts higher demands on the transmission rate of wireless communication, and in order to meet the growing mobile service demands, people need to provide a new technology on the basis of 4G or 5G to further improve the transmission rate and throughput of a wireless communication system. The full-duplex technology can further improve the Frequency spectrum utilization rate on the basis of the existing wireless communication system, and different from the traditional half-duplex system which adopts Time domain orthogonal Division (for example, Time Division duplex (namely, Time Division duplex, abbreviated as TDD) or Frequency domain orthogonal Division (for example, Frequency Division duplex (namely, Frequency Division duplex, abbreviated as FDD)) for uplink and downlink, the full-duplex system allows the uplink and downlink of a user to simultaneously transmit in the Time domain and the Frequency domain, so that the full-duplex system can theoretically reach twice the throughput of the half-duplex system. However, since the uplink and the downlink are at the same time and the same frequency, the transmission signal of the same full-duplex device in the full-duplex system will generate a strong self-interference signal to the received signal when performing full-duplex transmission, and the strength of the self-interference signal will even be 120dB higher or even more than the bottom noise, so in order to enable the full-duplex system to operate stably, a design scheme is required to eliminate the self-interference signal, so that the strength of the self-interference signal is at least reduced to the same level as the bottom noise.
Currently, there are many methods for self-interference signal cancellation, which may include a passive cancellation method, an analog cancellation method, a digital cancellation method, and so on, and multiple self-interference signal cancellation methods are commonly used in a full-duplex system in practical applications. However, even if the received signal is made to pass through a series of self-interference signal cancellation modules, there is no guarantee that the self-interference signal will be completely cancelled, namely: the residual self-interference signal is always mixed in the receiving signal of the full-duplex device. This means that in the design of a full duplex system, the effect of the residual self-interference signal needs to be taken into account.
An effective means of reducing the residual self-interference signal is to reduce the transmit power of the full-duplex device. When the full-duplex device under consideration is a base station, the base station may adjust downlink transmission power according to its own self-interference signal cancellation capability, and current communication protocols (e.g., third generation partnership project long term evolution (abbreviated as 3GPP LTE) and third generation partnership project new air interface (abbreviated as 3GPP NR)) may support such operation. When the full-duplex device under consideration is a full-duplex terminal, the transmit power of the full-duplex terminal is determined by both open-loop power control (hereinafter referred to as open-loop power control) and closed-loop power control (hereinafter referred to as closed-loop power control), wherein the power of the open-loop power control is obtained by: calculating path loss by the terminal according to the downlink reference signal, and performing path loss compensation on target receiving power configured by the base station according to the calculated path loss, wherein the compensated target receiving power is power controlled by open loop power; the power of the closed loop power control is configured by the base station, for example, the base station configures the scheduled uplink physical signal or uplink physical channel through the transmit power command, so as to increase or decrease a certain amount of power based on the current transmit power. On the premise that the self-interference signal remains in the received signal of the full-duplex terminal, the base station may adjust the uplink transmit power of the terminal to be higher through closed-loop power control of the terminal, so that the residual self-interference signal exists in the received signal of the terminal working in the full-duplex mode, and the downlink receiving performance of the terminal is affected.
The existing terminal may report the power headroom and the maximum transmit power of the terminal operating in the non-full-duplex mode to the base station through a power headroom reporting mechanism, and serve as a basis for configuring a transmit power control command (TPC command for short) by the base station.
However, the existing power headroom reporting method does not consider the situation that the terminal may switch between the non-full-duplex mode and the full-duplex mode. That is, the conventional power headroom reporting method cannot perform corresponding power headroom reporting according to the support capability of the terminal for full duplex. In this case, when the base station determines the transmit power control command of the closed-loop power control to perform power control, the base station cannot control the transmit power of the terminal according to the capability of the terminal and the power headroom corresponding to the capability of the terminal, so that residual self-interference signals existing in the received signals of the terminal cannot be effectively eliminated, thereby causing link transmission loss.
Disclosure of Invention
The exemplary embodiments of the present disclosure aim to overcome the defect in the existing wireless communication technology that the corresponding power headroom report cannot be performed according to the capability information.
According to an exemplary embodiment of the present disclosure, a power headroom reporting method is provided, where the power headroom reporting method includes: reporting capability information; and reporting the power headroom according to a reporting condition corresponding to the capability information, wherein the capability information comprises: information indicating whether the terminal supports full duplex.
Optionally, the step of reporting the capability information includes at least one of the following: carrying the capability information in an information unit for reporting the capability information; and reporting the capability information through a message in a random access process.
Optionally, the step of reporting the capability information through a message in a random access process includes one of the following: transmitting a random access channel through a predetermined physical resource; reporting the capability information through an uplink shared channel of the message A in the two-step random access process; reporting the capability information through an uplink shared channel of a message 3 in a four-step random access process, wherein the predetermined physical resource corresponds to the capability information and comprises at least one of the following items: a predetermined random access signal sequence resource; a predetermined time domain resource for transmitting a random access channel; and predetermined frequency domain resources for transmitting the random access channel.
Optionally, the power headroom reporting method further includes at least one of the following: when the terminal selects a sequence in a preset leader sequence group as a leader sequence of a random access channel, determining that the terminal supports full duplex; when the terminal transmits a random access channel on a predetermined subcarrier and/or a predetermined physical resource block, it is determined that the terminal supports full duplex.
Optionally, the reporting condition includes: whether an indication for informing the terminal of performing full duplex mode power headroom reporting is obtained, wherein the step of performing power headroom reporting according to the reporting condition corresponding to the capability information comprises the following steps: and when the indication is acquired, reporting the full duplex mode power headroom.
Optionally, the reporting condition includes: reporting the capability information, wherein the reporting the power headroom according to the reporting condition corresponding to the capability information comprises: and when the reporting of the capability information is finished and the capability information comprises information indicating that the terminal supports full duplex, carrying out full duplex mode power headroom reporting.
Optionally, the reporting condition includes: and reporting the power headroom according to a reporting condition corresponding to the capability information, wherein the step of reporting the power headroom according to the reporting condition corresponding to the capability information comprises: and when the frequency domain resource for transmission acquired by the terminal is located in the bandwidth or the bandwidth part corresponding to the full duplex, reporting the full duplex mode power allowance.
Optionally, the step of reporting the power headroom includes performing full duplex mode power headroom reporting and/or performing non-full duplex mode power headroom reporting, where the step of performing full duplex mode power headroom reporting includes reporting at least one of the following items: the method comprises the following steps that the power margin of a terminal working in a full duplex mode, the maximum transmitting power of the terminal working in the full duplex mode, the power margin of the terminal working in a non-full duplex mode and the maximum transmitting power of the terminal working in the non-full duplex mode are calculated; the power margin of the terminal working in the non-full-duplex mode, the maximum transmitting power of the terminal working in the non-full-duplex mode, the difference value between the power margin of the terminal working in the full-duplex mode and the power margin of the terminal working in the non-full-duplex mode, and the difference value between the maximum transmitting power of the terminal working in the full-duplex mode and the maximum transmitting power of the terminal working in the non-full-duplex mode.
Optionally, the step of reporting the power headroom includes: performing power headroom reporting by a control unit of media access control, wherein each control unit stores one of the following items and an indication field indicating the one item: the power margin of the terminal working in the full-duplex mode, the maximum transmitting power of the terminal working in the full-duplex mode, the difference value between the power margin of the terminal working in the full-duplex mode and the power margin of the terminal working in the non-full-duplex mode, and the difference value between the maximum transmitting power of the terminal working in the full-duplex mode and the maximum transmitting power of the terminal working in the non-full-duplex mode.
According to another exemplary embodiment of the present disclosure, a terminal supporting power headroom reporting is provided, where the terminal includes: the capability information reporting unit is configured to report the capability information; a power headroom reporting unit, configured to perform power headroom reporting according to a reporting condition corresponding to the capability information, where the capability information includes: information indicating whether the terminal supports full duplex.
Optionally, the capability information reporting unit carries the capability information in an information unit for reporting the capability information, and/or reports the capability information through a message in a random access process.
Optionally, the capability information reporting unit reports the capability information through one of the following items: transmitting a random access channel through a predetermined physical resource; reporting the capability information through an uplink shared channel of the message A in the two-step random access process; reporting the capability information through an uplink shared channel of a message 3 in a four-step random access process, wherein the predetermined physical resource corresponds to the capability information and comprises at least one of the following items: a predetermined random access signal sequence resource; a predetermined time domain resource for transmitting a random access channel; and predetermined frequency domain resources for transmitting the random access channel.
Optionally, the terminal further includes: a capability determination unit configured to: when the terminal selects a sequence in a preset leader sequence group as a leader sequence of a random access channel, determining that the terminal supports full duplex; and/or determining that the terminal supports full duplex when the terminal transmits a random access channel on a predetermined subcarrier and/or a predetermined physical resource block.
Optionally, the reporting condition includes: and whether an indication for informing a terminal of reporting the full-duplex mode power headroom is acquired, and when the indication is acquired, the power headroom reporting unit reports the full-duplex mode power headroom.
Optionally, the reporting condition includes: and reporting the capability information, wherein when the reporting of the capability information is completed and the capability information includes information indicating that the terminal supports full duplex, the power headroom reporting unit performs full duplex mode power headroom reporting.
Optionally, the reporting condition includes: and reporting the full-duplex mode power headroom by the power headroom reporting unit when the frequency domain resource which is acquired by the terminal and used for transmission is positioned in the bandwidth or the bandwidth part which has the corresponding relation with the full duplex mode according to the corresponding relation between the bandwidth or the bandwidth part configured by the capability information and the duplex mode.
Optionally, the power headroom reporting unit performs full-duplex mode power headroom reporting and/or non-full-duplex mode power headroom reporting, where the power headroom reporting unit reports at least one of the following items when performing full-duplex mode power headroom reporting: the method comprises the following steps that the power margin of a terminal working in a full duplex mode, the maximum transmitting power of the terminal working in the full duplex mode, the power margin of the terminal working in a non-full duplex mode and the maximum transmitting power of the terminal working in the non-full duplex mode are calculated; the power margin of the terminal working in the non-full-duplex mode, the maximum transmitting power of the terminal working in the non-full-duplex mode, the difference value between the power margin of the terminal working in the full-duplex mode and the power margin of the terminal working in the non-full-duplex mode, and the difference value between the maximum transmitting power of the terminal working in the full-duplex mode and the maximum transmitting power of the terminal working in the non-full-duplex mode.
Optionally, the power headroom reporting unit reports the power headroom through a control unit controlled by a medium access, where each control unit stores one of the following items and an indication field indicating the one item: the terminal works in the power margin of a full duplex mode; the terminal works in the maximum transmitting power under the full duplex mode; the difference between the power headroom of the terminal working in the full-duplex mode and the power headroom of the terminal working in the non-full-duplex mode; and the difference between the maximum transmission power of the terminal operating in the full-duplex mode and the maximum transmission power of the terminal operating in the non-full-duplex mode.
According to another exemplary embodiment of the present disclosure, there is provided a base station, wherein the base station includes: a capability information receiving unit configured to receive capability information; a configuration unit configured to perform configuration according to the received capability information, wherein the configuration performed by the configuration unit includes at least one of: sending an indication for informing the terminal of reporting the full-duplex mode power headroom according to the capability information; sending received feedback for the capability information; and configuring a bandwidth for the terminal according to the capability information, wherein the capability information comprises: information indicating whether the terminal supports full duplex.
According to another exemplary embodiment of the present disclosure, there is provided a configuration method performed by a base station, wherein the configuration method includes: receiving capability information; configuring according to the received capability information, wherein the configuring comprises at least one of: sending an indication for informing the terminal of reporting the full-duplex mode power headroom according to the capability information; sending received feedback for the capability information; and configuring a bandwidth for the terminal according to the capability information, wherein the capability information comprises: information indicating whether the terminal supports full duplex.
According to another exemplary embodiment of the present disclosure, a system is provided comprising at least one computing device and at least one storage device storing instructions, wherein the instructions, when executed by the at least one computing device, cause the at least one computing device to perform the method as described above.
According to another exemplary embodiment of the present disclosure, a computer-readable storage medium storing instructions is provided, wherein the instructions, when executed by at least one computing device, cause the at least one computing device to perform the method as described above.
According to the power headroom reporting method, the terminal supporting the power headroom reporting, the configuration method executed by the base station and the base station disclosed by the invention. And allowing the terminal to report the capability information and carry out power headroom report according to a report condition corresponding to the capability information, so that the base station can effectively control the transmitting power of the terminal according to the information reported by the terminal, and the transmission loss of a link is reduced.
Additional aspects and/or advantages of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the general inventive concept.
Drawings
The above and other objects and features of the exemplary embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate exemplary embodiments, wherein:
fig. 1 shows a flowchart of a power headroom reporting method according to an exemplary embodiment of the present disclosure;
fig. 2 shows a block diagram of a terminal supporting power headroom reporting according to an example embodiment of the present disclosure;
fig. 3 shows a flow chart of a configuration method performed by a base station according to an example embodiment of the present disclosure;
fig. 4 shows a block diagram of a base station according to an example embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The embodiments are described below in order to explain the present disclosure by referring to the figures.
Fig. 1 shows a flowchart of a power headroom reporting method according to an exemplary embodiment of the present disclosure.
As shown in fig. 1, the power headroom reporting method includes steps 110 and 120. In step 110, reporting capability information, wherein the capability information includes: information indicating whether the terminal supports full duplex. In step 120, power headroom reporting is performed according to the reporting condition corresponding to the capability information. The power headroom reporting method can be performed by a terminal supporting power headroom reporting.
Terminals that support power headroom reporting include any terminal that supports full-duplex and/or non-full-duplex, such as a cell phone, a tablet, a smart wearable device (e.g., a wristwatch, virtual visual glasses), a personal computer, a personal digital assistant, an e-book reader, a smart home appliance, and so on. The above terminals are merely examples and are not intended to limit the scope of the present disclosure, and any other terminals that support full duplex and/or non-full duplex are possible.
Here, the terminal supports full duplex may mean: the terminal transmits and receives physical channels and/or physical signals on the same time domain and frequency domain, wherein the transmitted physical channels or physical signals include, but are not limited to: a physical uplink shared channel, a physical uplink control channel, a physical random access channel, a sounding reference signal and an uplink demodulation reference signal; the received physical channels or physical signals include, but are not limited to: a physical downlink shared channel, a physical downlink control channel, a physical broadcast channel, a channel state information reference signal, a positioning reference signal, a downlink demodulation reference signal, and the like. Additionally, the non-full duplex includes at least one of: time division duplex, frequency division duplex, full duplex frequency division duplex, half duplex frequency division duplex.
As an example, step 110 comprises at least one of: carrying the capability information in an information unit for reporting the capability information; and reporting the capability information through a message in a random access process.
As an example, the step of reporting the capability information through a message in a random access process includes: transmitting a random access channel through a specific physical resource, wherein the specific physical resource corresponds to the capability information and includes at least one of: the random access channel comprises specific random access signal sequence resources, specific time domain resources used for sending the random access channel and specific frequency domain resources used for sending the random access channel. In an exemplary embodiment of the present disclosure, "specific" may mean "predetermined", "specified", "pre-specified", and the like.
As an example, whether the terminal supports full duplex may be determined by at least one of: when the terminal selects a sequence in a specific preamble sequence group as a preamble sequence of a random access channel, determining that the terminal supports full duplex; when the terminal transmits the random access channel on a specific subcarrier and/or a specific physical resource block, it is determined that the terminal supports full duplex, otherwise, when the terminal transmits the random access channel on other subcarriers except the specific subcarrier and/or other physical resource blocks except the specific physical resource block, it means that the terminal does not support full duplex, that is: full duplex capability is not available.
Specifically, the full duplex capability may mean whether the terminal supports full duplex, and the information indicating whether the terminal supports full duplex may be simply referred to as full duplex capability information. The method for reporting the full duplex capability information by the terminal may include: the terminal carries full-duplex capability information in an information element (information element) for reporting the full-duplex capability information.
As an example, the terminal may report the full-duplex capability information through an uplink shared channel of a message a (msga) in a two-step random access process or an uplink shared channel of a message 3(Msg3) in a four-step random access process, or the terminal sends the random access channel using a physical resource having a corresponding relationship with the full-duplex capability of the terminal, so as to carry the full-duplex capability information of the terminal. For example, a Radio Resource Control (RRC) connection establishment request carried by the message 3 in the four-step random access procedure includes full duplex capability information.
As an example, when the reporting condition includes whether an indication for notifying the terminal to perform full duplex mode power headroom reporting is acquired, step 120 includes: and when the indication is acquired, reporting the full duplex mode power headroom. The indication may be sent to the terminal by the base station, and specifically, when the base station receives the capability information reported by the terminal and the reported capability information includes information indicating that the terminal supports full duplex, it may be determined that the current terminal supports full duplex. In this case, the indication may be sent to the terminal to indicate that the terminal may perform full duplex mode power headroom reporting.
As an example, when the reporting condition includes a reporting condition of the capability information, step 120 includes: and when the reporting of the capability information is finished and the capability information comprises information indicating that the terminal supports a full duplex mode, carrying out full duplex mode power headroom reporting.
As an example, when the reporting condition includes a correspondence between a bandwidth or a bandwidth part configured according to the capability information and a duplex mode, step 120 includes: and when the frequency domain resource for transmission acquired by the terminal is located in the bandwidth or the bandwidth part corresponding to the full duplex, reporting the full duplex mode power allowance.
Specifically, the reporting condition may relate to a higher layer signaling sent by the base station after receiving the capability information, that is, the terminal may obtain an indication in the higher layer signaling (e.g., the higher layer signaling from the base station) to notify the terminal of performing full duplex mode power headroom reporting, where the higher layer signaling may include a relevant parameter configured to a single terminal, a cell, or a cell group to notify the terminal of performing full duplex mode power headroom reporting. In this case, if the terminal supports the full duplex mode, the terminal may perform full duplex mode power headroom reporting. The higher layer signaling configured for a single terminal may be user-specific signaling and the higher layer signaling configured for multiple terminals (e.g., cells or groups of cells) may be user-group-specific signaling. If the terminal acquires the user-specific signaling or the user group-specific signaling and the acquired signaling comprises the related parameters for informing the terminal to carry out the full-duplex mode power headroom reporting, the terminal carries out the full-duplex mode power headroom reporting, otherwise, for example, if the acquired signaling does not comprise the related parameters for informing the terminal to carry out the full-duplex mode power headroom reporting, the terminal carries out the non-full-duplex mode power headroom reporting.
The high layer signaling can bear downlink control signaling, and in this case, when the terminal acquires an indication informing the terminal of reporting the full duplex mode power headroom in the downlink control signaling, the terminal reports the full duplex mode power headroom. Specifically, the terminal may obtain a downlink control signaling carrying the uplink grant, and if the downlink control signaling carrying the uplink grant includes an indication notifying the terminal to perform full-duplex mode power headroom reporting, the terminal performs full-duplex mode power headroom reporting through the uplink shared channel scheduled this time, for example, the uplink shared channel carries the full-duplex mode power headroom.
The reporting condition may also be related to the reporting condition of the capability information, that is, if the terminal completes capability reporting and the reported capability information includes information indicating that the terminal supports the full duplex mode, the terminal performs full duplex mode power headroom reporting; otherwise, namely: and if the terminal completes capability reporting and reports the capability information including the information indicating that the terminal supports the full duplex mode unsuccessfully, the terminal performs non-full duplex mode power headroom reporting.
The reporting condition may also be determined according to a bandwidth or a bandwidth portion currently configured to the terminal, that is, there may be a correspondence between the bandwidth or the bandwidth portion configured to the terminal and the duplex mode, and when the bandwidth or the bandwidth portion corresponds to the full-duplex mode, the full-duplex mode power headroom reporting is performed, and when the bandwidth or the bandwidth portion corresponds to the non-full-duplex mode, the non-full-duplex mode power headroom reporting is performed. In particular, the configured bandwidth or bandwidth portion may be an uplink and/or downlink bandwidth or bandwidth portion currently activated by the terminal. For example, if the bandwidth or the bandwidth part acquired by the terminal (i.e. configured to the terminal) supports the terminal to perform full duplex mode transmission, the terminal performs full duplex mode power headroom reporting; otherwise, for example, if the bandwidth or the bandwidth part acquired by the terminal only supports the terminal to perform non-full-duplex mode transmission, the terminal performs non-full-duplex mode power headroom reporting.
As an example, in step 120, full duplex mode power headroom reporting and/or non-full duplex mode power headroom reporting may be performed. Reporting the power margin of the terminal in the full duplex mode, the maximum transmitting power of the terminal in the full duplex mode, the power margin of the terminal in the non-full duplex mode and the maximum transmitting power of the terminal in the non-full duplex mode; and/or reporting the power margin of the terminal working in the non-full-duplex mode, the maximum transmitting power of the terminal working in the non-full-duplex mode, the difference value between the power margin of the terminal working in the full-duplex mode and the power margin of the terminal working in the non-full-duplex mode, and the difference value between the maximum transmitting power of the terminal working in the full-duplex mode and the maximum transmitting power of the terminal working in the non-full-duplex mode.
As an example, the step of reporting the power headroom in the non-full-duplex mode includes reporting the power headroom of the terminal operating in the non-full-duplex mode and the maximum transmission power of the terminal operating in the non-full-duplex mode; and/or reporting the power margin of the terminal working in the full-duplex mode, the maximum transmitting power of the terminal working in the full-duplex mode, the difference value between the power margin of the terminal working in the full-duplex mode and the power margin of the terminal working in the non-full-duplex mode, and the difference value between the maximum transmitting power of the terminal working in the full-duplex mode and the maximum transmitting power of the terminal working in the non-full-duplex mode.
The power headroom of the terminal operating in the non-full-duplex mode includes but is not limited to: type 1 power headroom, type 2 power headroom, and type 3 power headroom, and the definitions of these three types of power headroom can be found in documents 3GPP, TS38.321, "NR; medium Access Control (MAC) protocol specification (Release 15) "; the maximum transmitting power of the terminal working in the non-full duplex mode comprises the following steps: the maximum value of the transmission power configured for the terminal, which is defined in documents 3GPP, TS38.213, "NR; physical layer procedures for control (Release 15) ").
As an example, power headroom reporting may be performed by a Control Element (CE) of media access Control (mac), where each Control Element stores one of the following items and an indication field indicating the one item: the terminal works in the power margin of a full duplex mode; the terminal works in the maximum transmitting power under the full duplex mode; the difference between the power headroom of the terminal working in the full-duplex mode and the power headroom of the terminal working in the non-full-duplex mode; and the difference between the maximum transmission power of the terminal operating in the full-duplex mode and the maximum transmission power of the terminal operating in the non-full-duplex mode.
A procedure of reporting the power headroom by the Control unit based on Medium Access Control (MAC) is described below with reference to tables 1 to 4.
In the embodiment shown in table 1, the specific content reported by the terminal may be a power margin of the terminal operating in the non-full-duplex mode, a maximum transmission power of the terminal operating in the non-full-duplex mode, and a difference between the maximum transmission power of the terminal operating in the full-duplex mode and the maximum transmission power of the terminal operating in the non-full-duplex mode. The control unit based on media access control reports a single entry of power headroom, where one control unit may be called a single entry PHR MAC CE and may be defined as follows:
TABLE 1
| R | R | PH(Type 1,PCell) |
| R | V1 | PCMAX,f,c |
| R | R | ΔP |
The single entry PHR MAC CE has a dynamic bit width, which may be two bytes or three bytes in size. When the bit width is three bytes, the single entry PHR MAC CE contains two fixed bytes and one byte for dynamic indication. In the single entry PHR MAC CE shown in table 1: r is a reserved bit; PH is a power headroom, specifically indicates a power headroom in a non-full duplex mode, for example, the length of the PH is set to 6 bits, but the present disclosure may not be limited thereto, and the PH may be a power headroom corresponding to a Primary Cell (PCell) or a power headroom corresponding to a Secondary Cell (SCell), and the Type of the power headroom indicated by the PH may be a Type 1(Type 1) power headroom, a Type 2 power headroom, a Type 3 power headroom, etc., and is described here by taking Type 1 as an example, but the present disclosure is not limited thereto; pCMAX,f,cIndicating non-full duplex modeA maximum transmit power; v1To indicate the field, to indicate whether Δ P is present, field V may not be included in the PHR MAC CE1In this case, V1A reserved bit can be stored in the position and is marked as R, and at the moment, the bit width of the single target PHR MAC CE is two bytes; Δ P indicates the difference between the maximum transmit power of the terminal operating in full duplex mode and the maximum transmit power of the terminal operating in non-full duplex mode.
In an exemplary embodiment of the present disclosure, a calculation formula of the maximum transmission power in the full duplex mode is as follows:
PFD_CMAX,f,c＝PCMAX,f,c+ΔP
wherein, PFD_CMAX,f,cWhich represents the maximum transmit power for the terminal operating in full duplex mode. Taking the type 1 power headroom as an example, the power headroom PH in the full duplex mode can be determined by the following formulaFD_type1,b,f,c(i,j,qd,l)：
Except for P in the formulaFD_CMAX,f,c(i) For the description of parameters other than these, reference is made to the prior art 3GPP, TS38.213, "NR; physical layer procedure for control (Release 15) ", where type 1 power headroom in non-full-duplex mode is employed, in an exemplary embodiment of the disclosure, the first term P to the right of the iso-sign in this formulaFD_CMAX,f,c(i) The maximum transmission power in the full-duplex mode can be represented, and the remaining parameter definitions on the right of the equal sign can refer to the prior art, in other words, the power headroom in the full-duplex mode reported by the terminal can be calculated by the following formula:
PHFD_type1,b,f,c(i,j,qd,l)＝PHtype1,b,f,c(i,j,qd,l)+ΔP
wherein the pH istype1,b,f,c(i,j,qdL) indicates that the terminal operates in a non-full-duplex modePower headroom, PH undertype1,b,f,c(i,j,qdL) and Δ P are contents directly reported by the terminal through the PHR MAC CE, and respectively represent the power headroom of the terminal in the full-duplex mode, and a difference between the power headroom of the terminal in the non-full-duplex mode and the power headroom of the terminal in the full-duplex mode. The reporting of the multi-entry PHR MAC CE may be implemented with reference to this embodiment, and details are not described here.
In the embodiment shown in table 2, the specific content reported by the terminal may be a power headroom of the terminal in the non-full-duplex mode, a maximum transmission power of the terminal in the non-full-duplex mode, and a power headroom of the terminal in the full-duplex mode. In one embodiment, a single entry PHR MAC CE may be defined as follows:
TABLE 2
| R | R | PH(Type 1,PCell) |
| R | V1 | PCMAX,f,c |
| R | R | PHFD(Type 1,PCell) |
The single entry PHR MAC CE has a dynamic bit width, which may be two bytes or three bytes in size, and includes two fixed bytes and one byte for dynamic indication. In Table 2In the single entry PHR MAC CE shown: r is a reserved bit; PH denotes a power headroom in a non-full duplex mode, for example, the PH length is set to 6 bits, but the present disclosure may not be limited thereto, and PH may be a power headroom corresponding to a primary cell or a power headroom corresponding to a secondary cell, and the type of the power headroom denoted by PH may be a type 1 power headroom, a type 2 power headroom, a type 3 power headroom, etc., and is described herein as a type 1 power headroom corresponding to a primary cell; PH valueFDIndicating the power headroom of the terminal operating in full duplex mode. PH valueFDThe calculation formula (c) can be obtained with reference to the documents cited above; pCMAX,f,cIndicating the maximum transmitting power of the terminal working in a non-full duplex mode; v1Is an indication field for indicating whether a PH existsFDThe field V may not be included in the PHR MAC CE1In this case, V1The reserved bit can be stored in the position, which is marked as R, and at this time, the bit width of the single entry PHR MAC CE is two bytes. Similarly, the reporting of the multi-entry PHR MAC CE may be implemented with reference to this embodiment, which is not described herein again.
In the embodiment shown in table 3, the specific content reported by the terminal may be the power headroom of the terminal operating in the non-full-duplex mode, the maximum transmission power of the terminal operating in the non-full-duplex mode, and the maximum transmission power of the terminal operating in the full-duplex mode. In one embodiment, a single entry PHR MAC CE may be defined as follows:
TABLE 3
| R | R | PH(Type 1,PCell) |
| R | V1 | PCMAX,f,c |
| R | R | PFD_CMAX,f,c |
The single entry PHR MAC CE has a dynamic bit width, which may be two bytes or three bytes in size, and includes two fixed bytes and one byte for dynamic indication. In the single entry PHR MAC CE shown in table 3: r is a reserved bit; indicating a power headroom in a non-full duplex mode, for example, the PH length is set to 6 bits, but the present disclosure is not limited thereto, and the PH may be a power headroom corresponding to a primary cell or a power headroom corresponding to a secondary cell, and the type of the power headroom indicated by the PH may be a type 1 power headroom, a type 2 power headroom, a type 3 power headroom, etc., and is described herein as a type 1 power headroom corresponding to a primary cell; pCMAX,f,cIndicating the maximum transmit power, P, of a terminal operating in a non-full-duplex modeFD_CMAX,f,cIndicating the maximum transmitting power of the terminal working in a full duplex mode; v1Is an indication field for indicating whether P existsFD_CMAX,f,cThe field V may not be included in the PHR MAC CE1In this case, V1The reserved bit can be stored in the position, which is marked as R, and at this time, the bit width of the single entry PHR MAC CE is two bytes.
The power headroom PH in full duplex mode can be understood with reference to the above-mentioned documentFD_type1,b,f,c(i,j,qdL) of the formula. In this embodiment, the calculation formula of the power headroom may be rewritten as:
PHFD_type1,b,f,c(i,j,qd,l)
＝PHtype1,b,f,c(i,j,qd,l)+(PFD_CMAX,f,c(i)-PCMAx,f,c(i))
wherein the pH istype1,b,f,c(i,j,qdL) indicates that the terminal is operating in a non-full-duplex modePower headroom of, PFD_CMAX,f,c(i) For maximum transmission power, P, of a terminal operating in full duplex modeCMAX,f,c(i) The maximum transmit power for the terminal operating in the non-full duplex mode. Similarly, the reporting of the multi-entry PHR MAC CE may be implemented with reference to this embodiment, which is not described herein again.
In the embodiment shown in table 4, the specific content reported by the terminal may be the power headroom of the terminal in the non-full-duplex mode, the maximum transmission power of the terminal in the non-full-duplex mode, the power headroom of the terminal in the full-duplex mode, and the maximum transmission power of the terminal in the full-duplex mode. In one embodiment, a single entry PHRMAC CE may be defined as follows:
TABLE 4
| R | R | PH(Type 1,PCell) |
| R | V1 | PCMAX,f,c |
| R | R | PHFD(Type 1,PCell) |
| R | R | PFD_CMAX,f,c |
The single entry PHR MAC CE is dynamicThe bit width, which may be two bytes or four bytes, includes two fixed bytes and one byte for dynamic indication. In the single entry PHR MAC CE shown in table 4: r is a reserved bit; PH denotes a power headroom in a non-full duplex mode, for example, the PH length is set to 6 bits, but the present disclosure may not be limited thereto, and PH may be a power headroom corresponding to a primary cell or a power headroom corresponding to a secondary cell, and the type of the power headroom denoted by PH may be a type 1 power headroom, a type 2 power headroom, a type 3 power headroom, etc., and is described herein as a type 1 power headroom corresponding to a primary cell. PCMAX,f,cIndicating the maximum transmitting power of the terminal in a non-full duplex mode; pFD_CMAX,f,cIndicating the maximum transmitting power of the terminal in a full duplex mode; v1To indicate the field, whether a PH exists is indicatedFD(Type 1, PCell) and PFD_CMAX,f,cThe field V may not be included in the PHR MAC CE1In this case, V1The reserved bit can be stored in the position, which is marked as R, and at this time, the bit width of the single entry PHR MAC CE is two bytes. Similarly, the reporting of the multi-entry PHR MAC CE may be implemented with reference to this embodiment, which is not described herein again.
Fig. 2 shows a block diagram of a terminal supporting power headroom reporting according to an example embodiment of the present disclosure.
As shown in fig. 2, the terminal includes: a capability information reporting unit 210 configured to report capability information; and a power headroom reporting unit 220 configured to perform power headroom reporting according to a reporting condition corresponding to the capability information, wherein the capability information includes: information indicating whether the terminal supports full duplex.
For example, the capability information reporting unit 210 carries the capability information in an information unit for reporting the capability information, and/or reports the capability information through a message in a random access process.
Optionally, the capability information reporting unit 210 reports the capability information through one of the following items: transmitting a random access channel through a predetermined physical resource; reporting the capability information through an uplink shared channel of the message A in the two-step random access process; reporting the capability information through an uplink shared channel of a message 3 in a four-step random access process, wherein the predetermined physical resource corresponds to the capability information and comprises at least one of the following items: a predetermined random access signal sequence resource; a predetermined time domain resource for transmitting a random access channel; and predetermined frequency domain resources for transmitting the random access channel.
Optionally, the terminal further includes: a capability determination unit (not shown) configured to: when the terminal selects a sequence in a preset leader sequence group as a leader sequence of a random access channel, determining that the terminal supports full duplex; and/or determining that the terminal supports full duplex when the terminal transmits a random access channel on a predetermined subcarrier and/or a predetermined physical resource block.
Optionally, the reporting condition includes: whether an indication for notifying the terminal to perform full duplex mode power headroom reporting is obtained, and when the indication is obtained, the power headroom reporting unit 220 performs full duplex mode power headroom reporting.
Optionally, the reporting condition includes: and reporting the capability information, wherein when the reporting of the capability information is completed and the capability information includes information indicating that the terminal supports full duplex, the power headroom reporting unit 220 performs full duplex mode power headroom reporting.
Optionally, the reporting condition includes: according to the corresponding relationship between the bandwidth or the bandwidth part configured by the capability information and the duplex mode, when the frequency domain resource for transmission acquired by the terminal is located in the bandwidth or the bandwidth part corresponding to the full duplex, the power headroom reporting unit 220 performs the power headroom reporting in the full duplex mode.
Optionally, the power headroom reporting unit 220 performs full duplex mode power headroom reporting and/or non-full duplex mode power headroom reporting, wherein when performing full duplex mode power headroom reporting, the power headroom reporting unit 220 reports at least one of the following items: the method comprises the following steps that the power margin of a terminal working in a full duplex mode, the maximum transmitting power of the terminal working in the full duplex mode, the power margin of the terminal working in a non-full duplex mode and the maximum transmitting power of the terminal working in the non-full duplex mode are calculated; the power margin of the terminal working in the non-full-duplex mode, the maximum transmitting power of the terminal working in the non-full-duplex mode, the difference value between the power margin of the terminal working in the full-duplex mode and the power margin of the terminal working in the non-full-duplex mode, and the difference value between the maximum transmitting power of the terminal working in the full-duplex mode and the maximum transmitting power of the terminal working in the non-full-duplex mode.
Optionally, the power headroom reporting unit 220 performs power headroom reporting by a control unit of media access control, where each control unit stores one of the following items and an indication field indicating the one item: the terminal works in the power margin of a full duplex mode; the terminal works in the maximum transmitting power under the full duplex mode; the difference between the power headroom of the terminal working in the full-duplex mode and the power headroom of the terminal working in the non-full-duplex mode; and the difference between the maximum transmission power of the terminal operating in the full-duplex mode and the maximum transmission power of the terminal operating in the non-full-duplex mode.
It should be understood that the specific implementation of the terminal supporting power headroom reporting according to the exemplary embodiment of the present disclosure may be implemented by referring to the related specific implementation described in conjunction with fig. 1, and is not described herein again.
Fig. 3 shows a flow chart of a configuration method performed by a base station according to an example embodiment of the present disclosure.
As shown in fig. 3, in step 310, capability information is received; at step 320, configuration is performed according to the received capability information. Here, step 320 includes at least one of: sending an indication for informing the terminal of reporting the full-duplex mode power headroom according to the capability information; sending received feedback for the capability information; and configuring a bandwidth for the terminal according to the capability information, wherein the capability information comprises: information indicating whether the terminal supports full duplex.
Fig. 4 shows a block diagram of a base station according to an example embodiment of the present disclosure. As shown in fig. 4, a base station according to an exemplary embodiment of the present disclosure includes: a capability information accepting unit 410 configured to receive capability information; a configuration unit 420 configured to perform configuration according to the received capability information, wherein the configuration performed by the configuration unit 420 includes at least one of: sending an indication for informing the terminal of reporting the full-duplex mode power headroom according to the capability information; sending received feedback for the capability information; and configuring a bandwidth for the terminal according to the capability information, wherein the capability information comprises: information indicating whether the terminal supports full duplex.
According to the disclosure, the capability information and the power headroom corresponding to the capability information can be reported, so that the base station can issue a corresponding control instruction according to the capability information of the terminal and the power headroom corresponding to the capability information to effectively configure the transmitting power of the terminal, thereby effectively eliminating a self-interference signal and reducing link transmission loss.
According to another exemplary embodiment of the present disclosure, a system is provided comprising at least one computing device and at least one storage device storing instructions, wherein the instructions, when executed by the at least one computing device, cause the at least one computing device to perform the method as described above.
According to another exemplary embodiment of the present disclosure, a computer-readable storage medium storing instructions is provided, wherein the instructions, when executed by at least one computing device, cause the at least one computing device to perform the method as described above.
The computer readable storage medium is any data storage device that can store data which can be read by a computer system. Examples of computer-readable storage media include: read-only memory, random access memory, read-only optical disks, magnetic tapes, floppy disks, optical data storage devices, and carrier waves (such as data transmission through the internet via wired or wireless transmission paths).
Further, it should be understood that the respective units of the terminal and the base station according to the exemplary embodiments of the present disclosure may be implemented as hardware components and/or software components. The individual units may be implemented, for example, using Field Programmable Gate Arrays (FPGAs) or Application Specific Integrated Circuits (ASICs), depending on the processing performed by the individual units as defined by the skilled person.
Furthermore, the method according to the exemplary embodiments of the present disclosure may be implemented as computer code in a computer-readable storage medium. The computer code can be implemented by those skilled in the art from the description of the method above. The computer code when executed in a computer implements the above-described methods of the present disclosure.
Although a few exemplary embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.
Claims (14)
1. A power headroom reporting method, wherein the power headroom reporting method comprises:
reporting capability information;
reporting the power headroom according to the reporting condition corresponding to the capability information,
wherein the capability information includes: information indicating whether the terminal supports full duplex.
2. The power headroom reporting method of claim 1, wherein the reporting capability information comprises at least one of:
carrying the capability information in an information unit for reporting the capability information;
and reporting the capability information through a message in a random access process.
3. The power headroom reporting method of claim 2, wherein the reporting of the capability information through a message in a random access procedure comprises one of:
transmitting a random access channel through a predetermined physical resource;
reporting the capability information through an uplink shared channel of the message A in the two-step random access process;
reporting the capability information through an uplink shared channel of a message 3 in the four-step random access process,
wherein the predetermined physical resource corresponds to the capability information and includes at least one of: a predetermined random access signal sequence resource; a predetermined time domain resource for transmitting a random access channel; and predetermined frequency domain resources for transmitting the random access channel.
4. The power headroom reporting method of any of claims 1-3, further comprising at least one of:
when the terminal selects a sequence in a preset leader sequence group as a leader sequence of a random access channel, determining that the terminal supports full duplex;
when the terminal transmits a random access channel on a predetermined subcarrier and/or a predetermined physical resource block, it is determined that the terminal supports full duplex.
5. The power headroom reporting method of claim 1, wherein the reporting condition comprises: whether an indication for informing the terminal of full duplex mode power headroom reporting is acquired,
wherein the step of reporting the power headroom according to the reporting condition corresponding to the capability information comprises: and when the indication is acquired, reporting the full duplex mode power headroom.
6. The power headroom reporting method of claim 1, wherein the reporting condition comprises: the reporting condition of the capability information is set,
wherein the step of reporting the power headroom according to the reporting condition corresponding to the capability information comprises:
and when the reporting of the capability information is finished and the capability information comprises information indicating that the terminal supports full duplex, carrying out full duplex mode power headroom reporting.
7. The power headroom reporting method of claim 1, wherein the reporting condition comprises: according to the corresponding relation between the bandwidth or the bandwidth part configured by the capability information and the duplex mode,
wherein the step of reporting the power headroom according to the reporting condition corresponding to the capability information comprises:
and when the frequency domain resource for transmission acquired by the terminal is located in the bandwidth or the bandwidth part corresponding to the full duplex, reporting the full duplex mode power allowance.
8. The method of claim 1, wherein the power headroom reporting comprises full duplex mode power headroom reporting and/or non-full duplex mode power headroom reporting,
wherein the step of reporting the full duplex mode power headroom comprises reporting at least one of:
the method comprises the following steps that the power margin of a terminal working in a full duplex mode, the maximum transmitting power of the terminal working in the full duplex mode, the power margin of the terminal working in a non-full duplex mode and the maximum transmitting power of the terminal working in the non-full duplex mode are calculated;
the power margin of the terminal working in the non-full-duplex mode, the maximum transmitting power of the terminal working in the non-full-duplex mode, the difference value between the power margin of the terminal working in the full-duplex mode and the power margin of the terminal working in the non-full-duplex mode, and the difference value between the maximum transmitting power of the terminal working in the full-duplex mode and the maximum transmitting power of the terminal working in the non-full-duplex mode.
9. The method of claim 1, wherein the reporting power headroom comprises: the power headroom report is carried out by a control unit of the media access control,
wherein each control unit stores one of the following items and an indication field indicating the one item:
the terminal works in the power margin of a full duplex mode; the terminal works in the maximum transmitting power under the full duplex mode; the difference between the power headroom of the terminal working in the full-duplex mode and the power headroom of the terminal working in the non-full-duplex mode; and the difference between the maximum transmission power of the terminal operating in the full-duplex mode and the maximum transmission power of the terminal operating in the non-full-duplex mode.
10. A terminal supporting power headroom reporting, wherein the terminal comprises:
the capability information reporting unit is configured to report the capability information;
a power headroom reporting unit configured to perform power headroom reporting according to a reporting condition corresponding to the capability information,
wherein the capability information includes: information indicating whether the terminal supports full duplex.
11. A configuration method performed by a base station, wherein the configuration method comprises:
receiving capability information;
the configuration is performed according to the received capability information,
wherein the step of configuring comprises at least one of: sending an indication for informing the terminal of reporting the full-duplex mode power headroom according to the capability information; sending received feedback for the capability information; and configuring a bandwidth for the terminal according to the capability information,
wherein the capability information includes: information indicating whether the terminal supports full duplex.
12. A base station, comprising:
a capability information receiving unit configured to receive capability information;
a configuration unit configured to perform configuration according to the received capability information,
wherein the configuration by the configuration unit comprises at least one of: sending an indication for informing the terminal of reporting the full-duplex mode power headroom according to the capability information; sending received feedback for the capability information; and configuring a bandwidth for the terminal according to the capability information,
wherein the capability information includes: information indicating whether the terminal supports full duplex.
13. A system comprising at least one computing device and at least one storage device storing instructions that, when executed by the at least one computing device, cause the at least one computing device to perform the method of any of claims 1 to 9 and 11.
14. A computer-readable storage medium storing instructions that, when executed by at least one computing device, cause the at least one computing device to perform the method of any of claims 1 to 9 and 11.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910303235.0A CN111836252A (en) | 2019-04-16 | 2019-04-16 | Power headroom reporting method, power headroom configuration method, terminal and base station |
| PCT/KR2020/003894 WO2020190098A1 (en) | 2019-03-21 | 2020-03-20 | Power headroom report, configuring, power control, and data transmission method, apparatus, terminal, and base station |
| EP20772869.2A EP3878231A4 (en) | 2019-03-21 | 2020-03-20 | Power headroom report, configuring, power control, and data transmission method, apparatus, terminal, and base station |
| KR1020217030328A KR20210130771A (en) | 2019-03-21 | 2020-03-20 | Power headroom reporting, configuration, power control and data transmission method, apparatus, terminal and base station |
| US17/439,537 US20220159580A1 (en) | 2019-03-21 | 2020-03-20 | Power headroom report, configuring, power control, and data transmission method, apparatus, terminal, and base station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910303235.0A CN111836252A (en) | 2019-04-16 | 2019-04-16 | Power headroom reporting method, power headroom configuration method, terminal and base station |
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| CN111836252A true CN111836252A (en) | 2020-10-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022252032A1 (en) * | 2021-05-31 | 2022-12-08 | 北京小米移动软件有限公司 | Terminal capability reporting method and apparatus, and storage medium |
| WO2023279252A1 (en) * | 2021-07-06 | 2023-01-12 | 北京小米移动软件有限公司 | Information processing method and apparatus, and communication device and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022252032A1 (en) * | 2021-05-31 | 2022-12-08 | 北京小米移动软件有限公司 | Terminal capability reporting method and apparatus, and storage medium |
| WO2023279252A1 (en) * | 2021-07-06 | 2023-01-12 | 北京小米移动软件有限公司 | Information processing method and apparatus, and communication device and storage medium |
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