CN110972248B - Method and device for determining transmission power of uplink channel - Google Patents
Method and device for determining transmission power of uplink channel Download PDFInfo
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- CN110972248B CN110972248B CN201811143389.XA CN201811143389A CN110972248B CN 110972248 B CN110972248 B CN 110972248B CN 201811143389 A CN201811143389 A CN 201811143389A CN 110972248 B CN110972248 B CN 110972248B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application discloses a method and a device for determining transmission power of an uplink channel, wherein the method comprises the following steps: receiving indication information, including a reliability requirement identifier of a target uplink channel; determining a reference uplink channel in uplink channels with the same reliability requirements according to the reliability requirement identification; accumulating uplink channel power adjustment quantities in the control information to obtain a total adjustment value of the target uplink channel power, and adjusting the target uplink channel power; the starting time is the control information receiving time of the reference uplink channel, and the ending time is the control information receiving time of the target uplink channel. The application also provides an uplink channel transmission power determining device, which is used for receiving the indication information, determining the reference uplink channel and adjusting the target uplink channel power. The scheme of the application aims to solve the problem of how to determine the transmission power of the uplink channel when the terminal equipment simultaneously supports various services with different reliability requirements.
Description
Technical Field
The present application relates to the field of mobile communications, and in particular, to a method and an apparatus for determining uplink channel transmission power.
Background
The new air interface (NR) wireless communication system supports three types of communication services, namely mobile enhanced bandwidth (eMBB), high-reliability low-delay communication (URLLC) and large-scale Internet of things (mMTC). Rel.15 is mainly applied to eMBB scenes, and the reliability of URLLC service required to be supported in a Rel.16 research system reaches 1 × 10 -6 While the delay remains between 0.5-1 ms. Through uplink power control in a wireless system, the quality of uplink transmitted data can be ensured by UE in a cell, interference to other users in the system is reduced as much as possible, and the service time of a UE battery is prolonged.
In the prior art, the transmission power of a Physical Uplink Shared Channel (PUSCH) is calculated after being accumulated according to a power adjustment amount indicated by a downlink control signaling; and the time sequence relation of a plurality of PUSCHs/PUCCHs scheduled by the current NR system is the same as the time sequence relation of a plurality of Physical Downlink Control Channels (PDCCHs) corresponding to the PUSCHs/PUCCHs. Therefore, the power control of each uplink channel can be performed sequentially based on the power control adjustment amount of the previous uplink channel.
Uplink power control of current NR systems is mainlyConsidering the reliability requirement of 1 × 10 -1 The eMBB service of (1). The NR system of Rel.16 will support a reliability requirement of 1 × 10 -6 URLLC service. And, one terminal device may support both the eMBB service and the URLLC service. The uplink power adjustment value is different for services with different reliability requirements. The higher the same transmission reliability requirement, the more power the terminal device is required to transmit. The prior art power adjustment scheme is no longer applicable.
Disclosure of Invention
The invention provides a method and a device for determining transmission power of an uplink channel, and aims to solve the problem of how to determine the transmission power of the uplink channel (PUSCH, PUCCH and SRS) when a terminal device simultaneously supports a plurality of services with different reliability requirements, such as eMBB service and URLLC service.
The embodiment of the application provides a method for determining uplink channel transmission power, which is used for a wireless communication system, wherein the wireless communication system comprises at least two uplink channels with reliability requirements, and the method comprises the following steps:
receiving indication information, including a reliability requirement identifier of a target uplink channel;
according to the reliability requirement identification, determining a reference uplink channel in uplink channels with the same reliability requirement; the sending time of the reference uplink channel is prior to the sending time of the target uplink channel, and no other uplink channel exists between the reference uplink channel and the target uplink channel;
accumulating the power adjustment quantities of all uplink channels with the same reliability requirement in the control information between the starting time and the ending time (and including the ending time), and obtaining a total adjustment value of the target uplink channel power for adjusting the target uplink channel power;
the starting time is the control information receiving time of the reference uplink channel or the time K symbols earlier than the first symbol of the reference uplink channel;
the deadline time is a control information receiving time of the target uplink channel or a time K symbols earlier than a first symbol of the target uplink channel.
Preferably, the total adjusted value of the target uplink channel power includes a total adjusted value of the power of the reference uplink channel.
In each embodiment of the method of the present application, the target uplink channel and the reference uplink channel are of the same type and are any one of the following: PUSCH, PUCCH, SRS.
In an embodiment of the method of the present application, the target uplink channel and the reference uplink channel are physical uplink shared channels; the total adjustment value of the target uplink channel power includes a power adjustment amount accumulated value of all uplink channels with the same reliability requirement in DCI format2_2 scrambled by TPC-PUSCH-RNTI for CRC check bits, which is received from a starting time to an ending time (including the ending time).
In another embodiment of the method of the present application, the target uplink channel and the reference uplink channel are physical uplink control channels; the total adjustment value of the target uplink channel power includes a power adjustment value accumulation value of all uplink channels with the same reliability requirement in DCI format2_2 scrambled by TPC-PUCCH-RNTI for CRC check bits, which is received from a starting time to an ending time (including the ending time).
In another embodiment of the method of the present application, the target uplink channel and the reference uplink channel are sounding reference signals; the total adjustment value of the target uplink channel power includes a power adjustment amount accumulated value of all uplink channels with the same reliability requirement in DCI format 2_3 received from a starting time to an ending time (including an ending time).
Particularly, when the target uplink channel is the PUSCH, the total adjustment value of the target uplink channel power further includes a power adjustment amount for the target uplink channel in DCI format0_0 or DCI format0_1 corresponding to the target uplink channel. When the target uplink channel is the PUCCH, the total adjustment value of the target uplink channel power further includes a power adjustment amount for the target uplink channel in DCI format 1_0 or DCI format 1_1 corresponding to the target uplink channel.
In a further optimized embodiment of the present application, for the indication information, the indication information is physical downlink control information or RRC configuration information.
Preferably, the indication information further includes an SRS resource identifier.
In a further preferred embodiment of the present application, the reliability requirement identifier is an RNTI; the method for indicating the information to contain the target uplink channel reliability requirement identification is that CRC check bits of the indicating information are scrambled by RNTI.
In a further preferred embodiment of the present application, the reliability requirement identifier is a type of a search space in which the indication information is located; the method for indicating information containing target uplink channel reliability requirement identification is that the indicating information is located in a public search space or a terminal equipment search space of a physical downlink control channel.
Preferably, the reliability requirement identifier is further configured to indicate a modulation and coding scheme corresponding to a modulation and coding scheme field in the indication information.
The present application further provides a device for determining uplink channel transmission power, which is used in the method according to any embodiment of the present application, and the device is configured to receive the indication information and determine a reliability requirement identifier of a target uplink channel; the device is also used for determining the reference uplink channel in the uplink channels with the same reliability requirement, and determining the starting time and the ending time; the device is further configured to accumulate power adjustment amounts in the control information between the starting time and the ending time to obtain a total adjustment value, and the total adjustment value is used for adjusting the target uplink channel power.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
the transmission power efficiency of the terminal device is improved. And the transmission reliability requirements of the eMBB service and the URLLC service are met. When multiple services are transmitted in a mixed mode, damage to an uplink channel of a service with high reliability requirements is avoided, and uplink channel power redundancy of a service with low reliability requirements is also avoided. Therefore, the transmission power efficiency of the terminal equipment is improved, and different target service reliability requirements are met.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a diagram illustrating an uplink channel power accumulation method according to the 3GPP standard;
fig. 2 is a related art PDCCH implementing PUSCH scheduling timing relationships;
FIG. 3 is a schematic diagram of an embodiment of the steps of the method of the present invention;
FIG. 4 is a diagram of PDCCH \ PUSCH with power control classified according to reliability requirements;
fig. 5 is a schematic view of an embodiment of the apparatus of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of an uplink channel power accumulation method of the 3GPP standard. According to the related art, the adjustment amount of the transmission power of the PUSCH in the case where the higher layer signaling tpc-allocation is enabled is accumulated between each transmission time. For example, fig. 1 includes two uplink channels PUSCH-1 and PUSCH-2. PUSCH-2 Transmission Power adjustment value Δ P 2 Transmission power adjustment value delta P included in PUSCH-1 1 On the basis of the accumulated transmission power control command (TPC command) power adjustment quantity of PDCCH-2 and the scrambling code of CRC check bits between PDCCH-1 and PDCCH-2 by TPC-PUSCH-RNTIThe power adjustment amount of the transmission power control command indicated in the 2_2 format downlink control signaling (DCI format 2_2) jointly encoded with other transmission power control commands. Assuming that M is the number of DCI formats 2_2, delta, between PDCCH-1 and PDCCH-2, where the terminal device detects that CRC check bits are scrambled with TPC-PUSCH-RNTI m Is the power adjustment amount indicated in the mth DCI format2_2 for the terminal device.
The transmission power adjustment amount of the PUCCH is accumulated among transmission time instants of the PUCCH as same as the PUSCH; the amount of transmission power adjustment of a Sounding Reference Signal (SRS) is accumulated between SRS transmission timings.
Specifically, the transmission power determination method for the uplink channel PUSCH of the NR system is as described in chapter 7 of 3gpp TS 38213 Vf20: adjusting the transmission power of the PUSCH at the ith transmission moment on the uplink BWP b corresponding to the power configuration set parameter index j on the serving cell c of the carrier f by the power adjustment amount f b，f，c (i, l) if higher layer signaling TPC-allocation is enabled, the total adjusted value of PUSCH power is:
f b，f，c (i，l)＝f b，f，c (i last ，l)+δ PUSCH，b，f，c (i last ，i，K PUSCH ，l)；f b，f，c (0，l)＝0
i last is the time of closest PUSCH transmission prior to transmission time i. Delta PUSCH，b，f，c (i last ，i，K PUSCH L) is determined by the transmission time i of the PUSCH in format0_0 downlink control signaling (DCI format 0_0) or in format0_1 downlink control signaling (DCI format 0_1) of PUSCH scheduling transmission time i last Thereafter, the CRC check bits are adjusted with the transmission control command indicated in DCI format2_2 scrambled with TPC-PUSCH-RNTI and jointly encoded with other transmission power commands.
The PUSCH of the terminal device at transmission time i is transmitted based on the instruction of detecting DCI format0_0 or DCI format0_1Time i last Is also based on detecting an indication of DCI format0_0 or DCI format0_1, K PUSCH Is the transmission time i last The number of symbols between the last symbol of the PDCCH corresponding to the PUSCH and the first symbol of the PUSCH at transmission time i. M is in use for scheduling i last Between the PDCCH for transmitting PUSCH at a time and the PDCCH for scheduling i-time transmission PUSCH, the terminal device detects the number of DCI formats 2_2 scrambled by TPC-PUSCH-RNTI for the CRC check bits, and then the cumulative calculation mode of the power adjustment amount is:
the transmission power determination method of the uplink channel PUCCH of the NR system is described in chapter 7 of 3gpp TS 38213 Vf20. On the serving cell c of the carrier f, the transmission power of the PUCCH at the ith transmission moment on the uplink BWP b corresponding to the power configuration set parameter index j is adjusted by a power adjustment amount g b，f，c (i, l) influence, the total adjusted value of PUCCH power is:
g b，f，c (i，l)＝g b，f，c (i last ，l)+δ PUCCH，b，f，c (i last ，i，K PUCCH ，l)；g b，f，c (0，l)＝0
i last is the closest time to the transmission of the PUCCH prior to transmission time i. Delta PUCCH，b，f，c (i last ，i，K PUCCH L) is determined by the transmission power command in DCI format 1_0 or DCI format 1_1 of PUCCH scheduling transmission time i and transmission time i of PUCCH last Then, the CRC check bit is adjusted by the transmission power control command indicated in DCI format2_2 scrambled by TPC-PUCCH-RNTI and jointly encoded with other transmission power control commands.
The PUCCH of the terminal equipment at the transmission time i is based on the indication of detecting DCI format 1_0 or DCI format 1_1, K PUCCH Is the number of symbols between the last symbol of the PDCCH and the first symbol of the PUCCH. M is in use for scheduling i last PDCC for transmitting PUCCH at any momentBetween H and PDCCH used for scheduling PUCCH transmission at i moment, the terminal equipment detects the number of DCI format2_2 scrambled by TPC-PUCCH-RNTI for CRC check bits, and then the cumulative calculation method of the power adjustment quantity is as follows:
similarly, according to chapter 7 of 3gpp TS 38213Vf20, the SRS transmission power adjustment amount is accumulated between SRS transmission times, which is not described herein again.
Fig. 2 is a related art PDCCH implementing PUSCH scheduling timing relationship. The time sequence relation of a plurality of PUSCHs/PUCCHs scheduled by the current NR system is the same as the time sequence relation of a plurality of PDCCHs corresponding to the current NR system. As fig. 2 takes PUSCH scheduling as an example: PDCCH-1, PDCCH-2, PDCCH-3 and PDCCH-4 are sequentially from first to last in time, and PUSCH-1, PUSCH-2, PUSCH-3 and PUSCH-4 which are respectively scheduled are also sequentially from first to last in time.
The uplink power control of the current NR system mainly considers the reliability requirement of 1 multiplied by 10 -1 The eMBB service of (1). The NR system of Rel.16 will support a reliability requirement of 1 × 10 -6 URLLC service. And, one terminal device may support both the eMBB service and the URLLC service. The uplink power adjustment value is different for services with different reliability requirements. The higher the same transmission reliability requirement, the more power the terminal device is required to transmit. If the reliability requirement is 1 x 10 -6 The requirement of the URLLC service is adjusted by 1 x 10 -1 The transmission power of the eMBB service transmission causes the transmission power of the terminal equipment to be inefficient and interferes with other terminal equipment in the system. If the reliability requirement is 1 x 10 -1 Requirement adjustment of eMBB service of 1 x 10 -6 The transmission power of the URLLC service transmission cannot meet the transmission reliability requirement of the URLLC service.
For example, in fig. 2, if the reliability requirement of the PUSCH-4 service is higher than that of the PUSCH-3, when performing power control on the PUSCH-4, the PUSCH-4 service is damaged if the power adjustment amount accumulated value is referred to the power adjustment amount of the PUSCH-3. On the contrary, if the reliability requirement of the PUSCH-4 service is lower than that of the PUSCH-3 service, when the PUSCH-4 is subjected to power control, if the power adjustment quantity accumulated value takes the power adjustment quantity of the PUSCH-3 as a reference, PUSCH-4 power redundancy is caused.
For further example, the target error rates of the URLLC service and the eMBB service data are different, and the adjustment strength of the power adjustment value is different. The higher the same transmission reliability requirement is, the larger the power required to be transmitted by the terminal equipment is, and the larger the corresponding power adjustment value is. If the reliability requirement is 1 x 10 -6 The requirement of URLLC service is determined to be 1 x 10 -1 The power adjustment value of the transmission power of the eMBB service transmission will cause the transmission power efficiency of the terminal equipment to be low, and cause the consequence of interference to other terminal equipments in the system. If the reliability requirement is 1 x 10 -1 Requirement adjustment of eMBB service of 1 x 10 -6 The power adjustment value of the transmission power of the URLLC service transmission cannot meet the transmission reliability requirement of the URLLC service.
FIG. 3 is a schematic diagram of an embodiment of the steps of the method of the present invention.
The embodiment of the application provides a method for determining the transmission power of an uplink channel, which is used for a wireless communication system, wherein the wireless communication system comprises the uplink channel with at least two reliability requirements. For example, the uplink channels are divided into at least two uplink channel sets according to the different requirements of the corresponding service reliability, and when the terminal device determines the target uplink channel transmission power, the adjustment amount of the uplink channel transmission power is determined to be accumulated only in the power adjustment value in the uplink channel set corresponding to the uplink channel.
Preferably, the uplink channels with the target bit error rates within the same preset range belong to the same uplink channel set. For example, the target bit error rate is 10 -1 The uplink channel of the uplink service belongs to an uplink channel set, and the target error rate is 10 -6 The uplink channel of the uplink service of (2) belongs to another uplink channel set. The number of uplink channel sets of the uplink channels transmitted by the terminal device may also be two or more. For example, if there are N target error rates for uplink traffic transmission, the terminal device sends the uplink traffic transmissionThe uplink channel set of the row channels is N (N is more than or equal to 2).
The types of the uplink channels belonging to the same uplink channel set are the same. The type refers to PUSCH, PUCCH or SRS.
The method specifically comprises the following steps:
in step 10, it should be noted that the indication information is physical downlink control information or RRC configuration information. The indication information for the terminal device to acquire the uplink channel may be physical downlink control information, which includes information for scheduling the terminal device to transmit the uplink channel. Alternatively, the indication information for transmitting the uplink channel acquired by the terminal device may be configuration information of a configuration grant PUSCH (Configured grant PUSCH) transmitted by the network device. The configuration information for configuring the authorized PUSCH has two types, one is that the network equipment configures the authorized PUSCH resources through RRC, and the terminal equipment can correspondingly send uplink channels on the resources after receiving the RRC configuration information. The second method is that the network device configures partial information of the authorized PUSCH resource through RRC configuration, and on the basis, the network device configures other partial information of the authorized PUSCH resource through the PDCCH configuration, and activates the configured authorized PUSCH resource configured by RRC. During the period that the PDCCH activates and configures the authorized PUSCH resources, the terminal equipment can correspondingly transmit the uplink channel on the resources.
In step 10, when the indication information is physical downlink control information, the reliability requirement flag may be, for example, an uplink channel set indication field in the physical downlink control information, which indicates to which uplink channel set the target uplink channel belongs. For example, if the uplink channel is PUSCH, if the indication information is PDCCH-1, the format is DCI format0_0 or DCI format0_1. The indication information is used for scheduling an uplink channel PUSCH-1.
For example, PDCCH-1 includes an uplink channel set indication field for indicating to which uplink channel set PUSCH-1 belongs. The terminal equipment determines which uplink channel set the PUSCH-1 belongs to according to the content of the PDCCH-1. Or, the field indicating the uplink channel set includes the first sequence number, that is, the index of the uplink channel set, and it is determined which uplink channel set the uplink channel belongs to according to the index of the target uplink channel set.
For another example, in the DCI formats 2_2 in which CRC check bits are scrambled by TPC-PUSCH-RNTI, there is an explicit signaling in the power adjustment amount of the terminal device to indicate which uplink channel set the power adjustment amount is for, and different uplink channel sets correspond to uplink channels with different error rate requirements.
The uplink channel set has N (N is greater than or equal to 2), and the value of N is configured to the terminal device through a high-level signaling, for example. The value of N may be preset, for example N =3. The field for indicating the uplink channel belongs to which uplink channel set is included in the downlink control channel PDCCH
A bit.
In step 10, it is further preferable that the indication information further includes an SRS resource identifier. The downlink control channel further includes another field as an SRS resource identifier, where the field is used to indicate an index of one SRS resource in the SRS resource set, and each SRS resource is pre-configured with a second sequence number of its corresponding uplink channel set.
And in combination with the reliability requirement identifier and the SRS resource identifier, the terminal equipment determines an index of the uplink channel set according to the first sequence number of the uplink channel set and the second sequence number of the uplink channel set, and determines which uplink channel set the uplink channel belongs to according to the index of the uplink channel set. For example, the relationship between the index of the uplink channel set and the first sequence number and the second sequence number of the uplink channel set is shown in table 1:
TABLE 1 relationship between the index of the uplink channel set and the first and second sequence numbers
and if the uplink channel set where the target uplink channel is located is called a target uplink channel set, the reference uplink channel belongs to the target uplink channel set, and no other uplink channel exists between the sending time of the reference uplink channel and the sending time of the target uplink channel by the terminal equipment. The absence of other uplink channels means that there are no other uplink channels with the same reliability requirement in the same uplink channel set range; but also refers to an uplink channel that is not of the same type as the target uplink channel, the reference uplink channel. For example, when the uplink channel is the PUSCH and the reference uplink channel is also the PUSCH, no other PUSCH is transmitted between the target uplink channel and the reference uplink channel. When the uplink channel is the PUCCH and the reference uplink channel is also the PUCCH, no other PUCCH is transmitted between the target uplink channel and the reference uplink channel. When the uplink channel is the SRS, and the reference uplink channel is also the SRS, no other SRS is transmitted between the target uplink channel and the reference uplink channel. That is, the target uplink channel and the reference uplink channel are adjacent in time in the same uplink channel set (i.e., the target uplink channel set).
In step 20, the terminal device receives the indication information and requests to transmit the reference uplink channel. It is necessary to distinguish between the indication information of the transmission target uplink channel and the indication information of the transmission reference uplink channel. For example, the first indication information is used to indicate the terminal device to send the target uplink channel, and the second indication information is used to indicate the terminal device to send the reference uplink channel. The types of the first indication information and the second indication information may be the same or different. For example, when the first indication information is the physical downlink control information, the second indication information may be the physical downlink control information, or may be RRC configuration information, or may be the physical downlink control information plus the RRC configuration information; conversely, when the second indication information is the above-mentioned physical downlink control information, the first indication information may be the physical downlink control information, or may be RRC configuration information, or may be the physical downlink control information plus the RRC configuration information.
the starting time is the control information receiving time of the reference uplink channel or the time K symbols earlier than the first symbol of the reference uplink channel; the deadline is a control information receiving time of the target uplink channel or a time K symbols earlier than a first symbol of the target uplink channel.
In step 30, the total adjusted value of the target uplink channel power includes the total adjusted value of the reference uplink channel power. It can be understood that the method of the present invention is also applicable when the reference uplink channel is adjusted before the target uplink channel. And obtaining the total adjusting value of the reference uplink channel power by taking the reference uplink channel as a target uplink channel.
In an embodiment of the method of the present application, the type of the target uplink channel is the same as that of the reference uplink channel, and the target uplink channel is any one of the following: PUSCH, PUCCH, SRS.
In step 30, for example, the target uplink channel and the reference uplink channel are PUSCHs. The total adjustment value of the target uplink channel power comprises the power adjustment quantity accumulated values of all uplink channels with the same reliability requirement in DCI format2_2 scrambled by TPC-PUSCH-RNTI for CRC check bits, which are received after the starting time, before the ending time and including the ending time.
In particular, when the target uplink channel is a PUSCH and the indication information is a physical downlink control signaling, the total adjustment value of the target uplink channel power further includes a power adjustment amount for the target uplink channel in DCI format0_0 or DCI format0_1 corresponding to the target uplink channel.
In step 30, for another example, the target uplink channel and the reference uplink channel are PUCCHs. The total adjustment value comprises power adjustment quantity accumulation values of all uplink channels with the same reliability requirement in DCI format2_2 of a CRC check bit scrambling code which is received after the starting time and before the ending time and comprises the ending time.
In particular, when the target uplink channel is a PUCCH and the indication information is a physical downlink control signaling, the total adjustment value of the target uplink channel power further includes a power adjustment amount for the target uplink channel in DCI format 1_0 or DCI format 1_1 corresponding to the target uplink channel.
In step 30, for another example, the target uplink channel and the reference uplink channel are SRSs. The total adjustment value of the target uplink channel power includes a power adjustment amount accumulation value of all uplink channels with the same reliability requirement in the DCI format 2_3, which is received after the starting time, before the ending time and including the ending time.
After the terminal device determines the total adjustment value of the target uplink channel, the terminal device may determine the transmission power of the target uplink channel according to other configuration values, specifically referring to the technical scheme in chapter 7 of 3gpp TS 38213Vf20.
In the above example, the URLLC service and the eMBB service may respectively use a total power adjustment value matched with the target performance of their own services, so as to ensure the transmission power efficiency of the terminal device, control the consequences of system interference, and meet the transmission reliability requirements of their respective service types. The cumulative power indication information DCI format2_2 and DCI format 2_3 are both physical downlink control information of the terminal device group. Taking DCI format2_2 obtained by scrambling CRC check bits with TPC-PUSCH-RNTI as an example, the DCI format includes accumulated power indication information of a plurality of terminal devices. The network equipment pre-configures TPC-PUSCH-RNTI and bit position information of the accumulated power indication information of the terminal equipment in DCI format 2_2. If the accumulated power indication information of the terminal device is to be respectively associated with different uplink channel sets, information of the uplink channel set corresponding to the accumulated power indication information needs to be identified in the accumulated power indication information. Specifically, the following two methods can be used: the accumulated power indication information includes information for identifying the uplink channel set corresponding to the accumulated power indication information, that is, the reliability requirement identifier; or the RNTI corresponding to the accumulated power indication information is used for identifying the uplink channel set corresponding to the accumulated power indication information.
In steps 10 to 20, as a further optimized embodiment of the present application, the reliability requirement identifier is an RNTI; the method for indicating the information to contain the target uplink channel reliability requirement identification is that CRC check bits of the indicating information are scrambled by RNTI. The network equipment configures different RNTI values for the terminal equipment, wherein the different RNTI values respectively correspond to the first sequence numbers of different uplink channel sets. And the terminal equipment determines which uplink channel set the PUSCH-1 belongs to according to the value of the RNTI of the PDCCH-1. For example, CRC check bits of the indication information are scrambled with a first RNTI to indicate that the uplink channel belongs to a first uplink channel set; and the CRC check bit of the physical downlink control information is scrambled by a second RNTI to indicate that the uplink channel belongs to a second uplink channel set. Here, the first uplink channel set and the second uplink channel set may be, for example, PUCCH and PUSCH corresponding to different target error rate requirements. For the PUSCH, PUCCH and SRS, the terminal device may determine which target uplink channel set is targeted according to the received DCI formats 2_2 scrambled by the TPC-PUSCH-RNTI for the CRC check bits, DCI formats 2_2 scrambled by the TPC-PUCCH-RNTI for the CRC check bits, and DCI formats 2_3, respectively. Taking DCI formats 2_2 with TPC-PUSCH-RNTI scrambling codes for CRC check bits as an example, one way is that a network device configures two RNTIs for a terminal device: TPC-PUSCH-RNTI-1 and TPC-PUSCH-RNTI-2. The power adjustment amount in the DCI formats 2_2 scrambled by TPC-PUSCH-RNTI-1 received by the terminal equipment is specific to the first uplink channel set, and the power adjustment amount in the DCI formats 2_2 scrambled by TPC-PUSCH-RNTI-2 received by the terminal equipment is specific to the second uplink channel set.
Preferably, the reliability requirement identifier is further configured to indicate a modulation and coding scheme corresponding to a modulation and coding scheme field in the indication information. For example, CRC check bits of the indication information are scrambled by a first RNTI, and are further used to indicate a first correspondence between a modulation and coding scheme field and a modulation and coding scheme in the indication information; and the CRC check bit of the physical downlink control information is scrambled by a second RNTI and is also used for indicating a second corresponding relation between a modulation coding mode field and a modulation coding mode in the indication information. Considering that the requirements of uplink services with different target bit error rate requirements on modulation and coding are different under the same wireless channel transmission environment. In the prior art, a system designs two different mapping relationships, referred to as a first corresponding relationship and a second corresponding relationship, of a modulation and coding mode field and a modulation and coding mode in a PDCCH according to different target error rate requirements. Before the network equipment schedules PDSCH/PUSCH for the terminal equipment, the network equipment configures two RNTIs for the terminal equipment: RNTI-1 and RNTI-2. If CRC in a PDCCH for scheduling PDSCH/PUSCH is scrambled by RNTI-1, a modulation coding mode field and a modulation coding mode in the PDCCH are in a first corresponding relation; and if CRC in the PDCCH for scheduling the PDSCH/PUSCH is scrambled by RNTI-2, the modulation coding mode field and the modulation coding mode in the PDCCH are in a second corresponding relation.
In steps 10 to 20, as a further optimized embodiment of the present application, the reliability requirement identifier is a type of a search space in which the indication information is located; the method for indicating information containing target uplink channel reliability requirement identification is that the indicating information is located in a public search space or a terminal equipment search space of a physical downlink control channel. For example, the indication information is located in a terminal device search space of a physical downlink control channel to indicate that the uplink channel belongs to a first uplink channel set; the indication information is located in a common search space of a physical downlink control channel and used for indicating that the uplink channel belongs to a second uplink channel set. When the network equipment sends the physical downlink control channel for scheduling the PDSCH/PUSCH for the terminal equipment, the network equipment can respectively correspond to different uplink channel sets through the physical downlink control channel positioned in a public search space or a terminal equipment search space. And the terminal equipment determines which uplink channel set the PUSCH-1 belongs to according to which common search space the PDCCH-1 is located in.
Preferably, the reliability requirement identifier is further configured to indicate a modulation and coding scheme corresponding to a modulation and coding scheme field in the indication information. For example, the indication information is located in a search space of the terminal device in the physical downlink control channel, and is further used to indicate a first corresponding relationship between a modulation and coding scheme field and a modulation and coding scheme in the indication information; the indication information is located in a common search space of a physical downlink control channel and is further used for indicating a second corresponding relationship between a modulation and coding scheme field and a modulation and coding scheme in the indication information. For example, if a PDCCH for scheduling PDSCH/PUSCH is located in a terminal device search space, a modulation and coding scheme field and a modulation and coding scheme in the PDCCH are in a first corresponding relationship; and if the PDCCH for scheduling the PDSCH/PUSCH is positioned in the common search space, the modulation coding mode field and the modulation coding mode in the PDCCH are in a second corresponding relation.
Fig. 4 is a diagram of PDCCH \ PUSCH classified for power control according to reliability requirements. The downlink control information PDCCH-1, PDCCH-2, PDCCH-3 and PDCCH-4 received by the terminal equipment are sequentially used for scheduling PUSCH-1, PUSCH-2, PUSCH-3 and PUSCH-4 respectively. And for PUSCH-3, determining that the PUSCH-3 belongs to a first uplink channel set according to the corresponding PDCCH-3, wherein in the first uplink channel set, an uplink channel which precedes the PUSCH-3 and is adjacent to the PUSCH-3 is PUSCH-1. The power adjustment amount of the PUSCH-3 is determined according to the power adjustment amount of the PUSCH-1. And for PUSCH-4, determining that the PUSCH-4 belongs to a second uplink channel set according to the corresponding PDCCH-4, wherein in the second uplink channel set, an uplink channel which precedes the PUSCH-4 and is adjacent to the PUSCH-4 is PUSCH-2. The power adjustment amount of the PUSCH-4 is determined according to the power adjustment amount of the PUSCH-2. If PUSCH-1 and PUSCH-3 correspond to eMBB services with reliability requirements of 1-10-1, and PUSCH-2 and PUSCH-4 correspond to URLLC services with reliability requirements of 1-10-6, the URLLC services and the eMBB services can respectively accumulate power adjustment quantities by using power adjustment values matched with the service target performance of the URLLC services and the eMBB services, so that the transmission power efficiency of terminal equipment is ensured, the interference effect of a system is controlled, and the transmission reliability requirements of respective service types are met.
In steps 10 to 30, DCI formats 2_2 with CRC check bits scrambled by TPC-PUSCH-RNTI, DCI formats 2_2 with CRC check bits scrambled by TPC-PUCCH-RNTI, and DCI formats 2_3 respectively include adjustment of transmission power for PUSCH, PUCCH, and SRS. DCI formats 2_2 scrambled by a CRC check bit through TPC-PUSCH-RNTI, DCI formats 2_2 scrambled by a CRC check bit through TPC-PUCCH-RNTI, and DCI formats 2_3 respectively adjust the sending power of the PUSCH, PUCCH and SRS, and the DCI formats need to be different according to target error rate requirements and correspond to each uplink channel set.
Fig. 5 is a schematic view of an embodiment of the apparatus of the present invention. The present application further provides a device for determining uplink channel transmission power, which is used in the method according to any embodiment of the present application, and the device includes a power processor 1, a signaling processor 2, and a channel processor 3. The signaling processor is configured to receive the DCI and the RRC and determine a reliability requirement identifier G of a target uplink channel; the channel processor is further configured to determine the reference uplink channel in uplink channels with the same reliability requirement, and determine the starting time t 1 End time t 2 (ii) a The channel processor is further configured to send the target uplink channel T and the reference uplink channel R; and the power processor is used for accumulating the power adjustment amount in the control information between the starting time and the ending time to obtain a total adjustment value delta P which is used for adjusting the target uplink channel power.
Specifically, the terminal device, for example, through the signaling processor, can be configured to obtain the control information receiving time t of the target uplink channel T And a control information reception time t of the reference uplink channel R 。
In particular, the terminal device can be further configured to calculate K = L × K, for example by the signaling processor 2 Wherein K is preset. For example, L is the time domain granularity of the uplink channel transmitted by the terminal device, k 2 Is the minimum value of the time offset value of the scheduling uplink channel acquired by the terminal device.
Specifically, the terminal device determines, through the channel processor, that the target uplink channel and the reference uplink channel belong to the same uplink channel set, and the target uplink channel and the reference uplink channel are adjacent in time in the uplink channel set.
And the terminal equipment determines the total adjusting value of the uplink channel according to the power adjusting quantity and the instant power adjusting quantity of the reference uplink channel through the power processor. Wherein the instantaneous power adjustment is a sum of the first adjustment and the second adjustment.
And if the target uplink channel and the reference uplink channel are PUSCHs, when the indication information is a downlink control channel, the first adjustment quantity is a total adjustment value of the power of the target uplink channel obtained by accumulating the power adjustment quantities of the channels identified by the reliability requirement in the control information after the starting time and before the ending time of the terminal equipment. Namely, the cumulative value of the power adjustment amount indicated by DCI formats 2_2 for CRC check bits with TPC-PUSCH-RNTI scrambles for all uplink channels with the same reliability requirement between the starting time and the ending time, and the second adjustment amount is the power adjustment amount in DCI format0_0 or DCI format0_1 corresponding to the target uplink channel. The starting time is the control information receiving time of the reference uplink channel, or the time K symbols before the first symbol of the reference uplink channel, and the ending time is the control information receiving time of the target uplink channel, or the time K symbols before the first symbol of the target uplink channel.
For the PUSCH, when the indication information is the configuration authorization PUSCH configured by RRC, the first adjustment quantity is a power adjustment quantity accumulation value indicated by DCI formats 2_2 of TPC-PUSCH-RNTI scrambling codes for CRC check bits of all uplink channels with the same reliability requirement between the starting time and the ending time of the terminal equipment. If no DCI format0_0 or DCI format0_1 corresponding to the uplink channel exists, the second adjustment amount is 0. If the indication information is the configuration authorization PUSCH configured by RRC and the DCI is activated, the second adjustment amount is the power adjustment amount in the DCI format0_0 or the DCI format0_1 of the activation configuration authorization PUSCH.
If the target uplink channel and the reference uplink channel are both PUCCHs, the first adjustment quantity is a power adjustment quantity accumulated value indicated by DCI formats 2_2 of a TPC-PUCCH-RNTI scrambling code for CRC check bits of all uplink channels with the same reliability requirement identification between starting time and ending time of the terminal equipment; the second adjustment amount is a power adjustment amount in DCI format 1_0 or DCI format 1_1 corresponding to the uplink channel.
If the target uplink channel and the reference uplink channel are both SRSs, the first adjustment amount is for all uplink channels with the same reliability requirement between the starting time and the ending time of the terminal device, and the cumulative value is adjusted for the SRS power of the target uplink channel set in DCI formats 2_3; the second adjustment amount is 0.
With the method and apparatus of the present application, the terminal device supports service transmission with different target bit error rates simultaneously, for example, simultaneously supporting the target bit error rate to be 10 -1 And the target error rate is 10 -6 In the case of uplink traffic, the target error rate is 10 -1 The uplink channel and the target bit error rate of the uplink service are 10 -6 The uplink channels of the uplink service belong to different uplink channel sets. Therefore, the power adjustment targets of the uplink channels in one uplink channel set are the same, and the problems that the transmission power efficiency of terminal equipment is low and other terminal equipment in the system is interfered due to the fact that the transmission power of service transmission with low reliability requirement is adjusted by the requirement of service with high reliability requirement can be avoided. The problem that the transmission reliability requirement of the URLLC service cannot be met if the transmission power of the service with high reliability requirement is adjusted by using the requirement of the service with low reliability requirement can also be avoided.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (14)
1. An uplink channel transmission power determining method, for use in a wireless communication system including an uplink channel with at least two reliability requirements, the method comprising:
receiving indication information, including a reliability requirement identifier of a target uplink channel;
according to the reliability requirement identification, determining a reference uplink channel in uplink channels with the same reliability requirement; the transmission time of the reference uplink channel is prior to the transmission time of the target uplink channel, and no other uplink channel exists between the reference uplink channel and the target uplink channel;
accumulating the power adjustment amounts of all uplink channels with the same reliability requirement in the control information which is after the starting time and before the ending time and comprises the ending time to obtain a total adjustment value of the target uplink channel power, wherein the total adjustment value is used for adjusting the target uplink channel power;
the starting time is the control information receiving time of the reference uplink channel or the time K symbols earlier than the first symbol of the reference uplink channel;
the deadline is a control information receiving time of the target uplink channel or a time K symbols earlier than a first symbol of the target uplink channel.
2. The method of claim 1,
and the total adjusting value of the target uplink channel power comprises the total adjusting value of the reference uplink channel power.
3. The method of claim 1,
the target uplink channel and the reference uplink channel are physical uplink shared channels;
the total adjustment value of the target uplink channel power comprises the power adjustment quantity accumulated values of all uplink channels with the same reliability requirement in DCI format2_2 scrambled by TPC-PUSCH-RNTI for CRC check bits, which are received after the starting time, before the ending time and including the ending time.
4. The method of claim 1,
the target uplink channel and the reference uplink channel are physical uplink control channels;
the total adjustment value of the target uplink channel power comprises the power adjustment quantity accumulated values of all uplink channels with the same reliability requirement in DCI format2_2 scrambled by TPC-PUCCH-RNTI for CRC check bits, which are received after the starting time, before the ending time and including the ending time.
5. The method of claim 1,
the target uplink channel and the reference uplink channel are sounding reference signals;
the total adjustment value of the target uplink channel power includes a power adjustment amount accumulation value of all uplink channels with the same reliability requirement in the DCI format 2_3, which is received after the starting time, before the ending time and including the ending time.
6. The method of claim 3,
the total adjustment value of the target uplink channel power includes a power adjustment amount for the target uplink channel in DCI format0_0 or DCI format0_1 corresponding to the target uplink channel.
7. The method of claim 4,
the total adjustment value of the target uplink channel power includes a power adjustment amount for the target uplink channel in DCI format 1_0 or DCI format 1_1 corresponding to the target uplink channel.
8. The method of claim 1 or 2,
the type of the target uplink channel is the same as that of the reference uplink channel, and the target uplink channel and the reference uplink channel are any one of the following:
PUSCH、PUCCH、SRS。
9. the method according to any one of claims 1 to 7,
the indication information is physical downlink control information or RRC configuration information.
10. The method according to any one of claims 1 to 7,
the indication information comprises SRS resource identification.
11. The method according to any one of claims 1 to 7,
the reliability requirement identifier is an RNTI;
the method for indicating the information to contain the target uplink channel reliability requirement identification is to scramble CRC check bits of the indication information by using RNTI.
12. The method according to any one of claims 1 to 7,
the reliability requirement identification is the type of the search space where the indication information is located;
the method for indicating the information to contain the target uplink channel reliability requirement identification is that the indication information is positioned in a public search space or a terminal device search space of a physical downlink control channel.
13. The method according to any one of claims 1 to 7,
the reliability requirement identifier is further used for indicating a modulation and coding scheme corresponding to the modulation and coding scheme field in the indication information.
14. An apparatus for determining uplink channel transmission power, the method according to any one of claims 1-13,
the device is used for receiving the indication information and determining the reliability requirement identification of the target uplink channel;
the device is also used for determining the reference uplink channel in the uplink channels with the same reliability requirement, and determining the starting time and the ending time;
the device is further configured to accumulate power adjustment amounts in the control information between the starting time and the ending time to obtain a total adjustment value, and the total adjustment value is used for adjusting the target uplink channel power.
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