Wireless signal transmission power adjustment method, and device

Abstract

The present application discloses a wireless signal transmission power adjustment method, comprising the following steps: sending a power indication value on a basic channel, the basic channel being any one of the following: an access preamble of a type 1 random access procedure, Msg3 of the type 1 random access procedure, and MsgA of a type 2 random access procedure; and acquiring a power adjustment value of a target PUCCH, the target PUCCH belonging to a common PUCCH resource and being used for carrying an HARQ-ACK message of Msg4 of the type 1 random access procedure or MsgB of the type 2 random access procedure. The present application further discloses an apparatus for implementing the method. The present application solves the problem that the coverage performance of a PUCCH cannot be adjusted on the basis of the working state of a terminal device in the random access procedure, is particularly suitable for a non-terrestrial network, and enhances the coverage performance of the PUCCH carrying Msg4 / MsgB HARQ-ACK.

Description

Method and device for adjusting wireless signal transmission power

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on August 11, 2023, with application number 202311014866.3 and invention name “A method and device for adjusting wireless signal transmission power”. The entire contents of the prior application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of mobile communication technology, and in particular to a method and device for adjusting wireless signal transmission power. Background Art

[0003] To meet the needs of integrated mobile communications between the sky and the earth, support for non-terrestrial networks (NTNs) is required. These networks include various communication modes, such as geostationary Earth Orbit (GEO), medium-Earth Orbit (MEO), and low-Earth Orbit (LEO). In NTNs, satellite-to-ground latency is very long. For example, at an altitude of 35,786 km, the single-path latency for GEO satellites can reach 272.4 ms. Non-GEO single-path latency can be at least 14.2 ms (600 km LEO), and at an altitude of 10,000 km, MEO single-path latency can reach 95.2 ms. This significant propagation latency significantly attenuates wireless signal transmission, impacting network coverage.

[0004] Evaluation and analysis revealed that some physical channels in the NTN communication mode fail to meet coverage requirements, becoming a bottleneck affecting NTN coverage performance. For example, in the parameter set 1 scenario with a UE antenna gain of -5dBi, LOS path transmission, and LEO-1200, the coverage performance of the PUCCH carrying Msg4 HARQ-ACK fails to meet coverage requirements.

[0005] Summary of the Invention

[0006] This application proposes a wireless signal transmission power adjustment method and device to solve the problem that the PUCCH coverage performance cannot be adjusted according to the working status of the terminal device during random access. It is particularly suitable for non-terrestrial communication networks and enhances the coverage performance of PUCCH carrying Msg4 / MsgB HARQ-ACK.

[0007] The method described in any embodiment of the first aspect of the present application, used in a terminal-side device, comprises the following steps:

[0008] Sending a power indicator value on a basic channel, where the basic channel is any one of the following: an access preamble of a Type 1 random access procedure, Msg3 of a Type 1 random access procedure, or MsgA of a Type 2 random access procedure;

[0009] A power adjustment value of a target PUCCH is obtained, where the target PUCCH belongs to a common PUCCH resource and is used to carry a HARQ-ACK message of a type 1 random access procedure Msg4 or a type 2 random access procedure MsgB.

[0010] Furthermore, in response to the downlink reference signal received power being greater than or less than a first threshold value, the power indication value is sent; the power indication value is used to indicate a requested power adjustment value, and the power adjustment value is used to reduce or increase the power value of the target PUCCH.

[0011] The method described in any embodiment of the first aspect of the present application, applied to a network-side device, comprises the following steps:

[0012] A power indication value is received on a basic channel, where the basic channel is any one of the following: an access preamble of a type 1 random access procedure, Msg3 of a type 1 random access procedure, or MsgA of a type 2 random access procedure;

[0013] A power adjustment value of a target PUCCH is sent, where the target PUCCH belongs to a common PUCCH resource.

[0014] In the method described in any one of the embodiments of the first aspect of the present application, preferably, the power indication value is used to indicate at least one of the following: the maximum transmit power configured on the terminal side, the power margin value of the terminal side device, and the requested power adjustment value.

[0015] In the method described in any embodiment of the first aspect of the present application, preferably, the transmission time of the target PUCCH is between a first time point and a second time point; at the first time point, the terminal side device first receives Msg4 of a type 1 random access procedure or MsgB of a type 2 random access procedure; at the second time point, the terminal side device determines the private PUCCH configuration. The time for sending HARQ-ACK information using the private PUCCH configuration resources is after the second time point.

[0016] In the method described in any one of the embodiments of the first aspect of the present application, preferably, the power adjustment value of the target PUCCH is carried by the scheduling information of the HARQ-ACK corresponding data contained in the target PUCCH, and / or by the group control information for adjusting the PUCCH transmission power.

[0017] In the method described in any one of the embodiments of the first aspect of the present application, preferably, the target PUCCH power adjustment value belongs to a first set, the power adjustment value of the private PUCCH belongs to a second set, and at least one value in the first set is greater than the maximum value in the second set.

[0018] In the method described in any one of the embodiments of the first aspect of the present application, preferably, the power indication value also includes a repeated transmission request status of the target PUCCH, which is used to indicate the number of repetitions of the target PUCCH.

[0019] In the second aspect, the present application also proposes a terminal side device for implementing any one of the methods described in the first aspect of the present application, and at least one module in the terminal side device is used for at least one of the following functions: at least one module in the terminal side device is used for at least one of the following functions: determining a power indication value, sending a power indication value in Msg1, Msg3 or MsgA of a random access process; obtaining and determining the power adjustment value of the target PUCCH in Msg2, Msg4 or MsgB received in a random access process; determining the configuration of private PUCCH resources.

[0020] In the third aspect, the present application also proposes a network side device for implementing any one of the methods described in the first aspect of the present application, and at least one module in the network side device is used for at least one of the following functions: obtaining a power indication value in Msg1, Msg3 or MsgA of the random access process; determining the power adjustment value of the target PUCCH, and sending the power adjustment value of the target PUCCH in Msg2, Msg4 or MsgB of the random access process; determining the private PUCCH resources, and sending the configuration of the private PUCCH resources in Msg2, Msg4 or MsgB of the random access process.

[0021] In a fourth aspect, the present application also proposes a communication device, comprising: a memory, a processor, and a computer program stored on the memory and runnable on the processor, wherein the computer program, when executed by the processor, implements the steps of the method described in any one of the embodiments of the first aspect of the present application.

[0022] In a fifth aspect, the present application further proposes a computer-readable medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in any embodiment of the first aspect of the present application are implemented.

[0023] In a sixth aspect, the present application also proposes a mobile communication system comprising at least one network side device as described in any embodiment of the present application and / or at least one terminal side device as described in any embodiment of the present application.

[0024] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects:

[0025] By carrying the maximum transmit power, power adjustment capability, power headroom value, or power adjustment request for transmission opportunity i on carrier f cell c configured by the UE in Msg1 / Msg3 / MsgA during the random access process, the gNB can determine the power indicator value for the target PUCCH based on this indication, effectively solving the problem of enhancing the coverage performance of PUCCH carrying Msg4 / MsgB HARQ-ACK in NTN networks, and optimizing the system's common PUCCH resource utilization efficiency to meet network access capacity and UE access latency requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] FIG1 is a schematic diagram of a conventional random access process;

[0028] FIG2 is a flow chart of an embodiment of the method of the present application for a terminal-side device;

[0029] FIG3 is a flow chart of an embodiment of the method of the present application for a network-side device;

[0030] Figure 4 is a schematic diagram of information interaction between the network side and the terminal side;

[0031] FIG5 is a schematic diagram of an embodiment of a network-side device;

[0032] FIG6 is a schematic diagram of an embodiment of a terminal side device;

[0033] FIG7 is a schematic structural diagram of a network-side device according to another embodiment of the present invention;

[0034] FIG8 is a block diagram of a terminal-side device according to another embodiment of the present invention. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] The following describes in detail the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0037] FIG1 is a schematic diagram of a traditional random access process.

[0038] The four steps of the traditional random access (Type 1) random access procedure are based on the exchange of four messages (Msgs) between the UE and the gNB: Msg1: One or more preambles sent by the UE based on the random access configuration and downlink measurements. Msg2: One or more responses to the Msg1 preamble transmitted by the gNB, providing further information and scheduling for Msg3. Msg3: Layer 2 / Layer 3 message. Msg4: Contention resolution.

[0039] The simplified random access, or Type 2 random access, procedure consists of two steps. The first step involves the transmission of uplink Msg A, which contains the equivalent of Msg1 and Msg3 from the four-step random access. The second step of the two-step random access is the transmission of downlink Msg B, which contains the equivalent of Msg2 and Msg4 from the four-step random access. (This essentially involves bundling uplink Msg1 and Msg3, and downlink Msg2 and Msg4.)

[0040] If Msg4 / MsgB does not carry UE-specific PUCCH configuration information, the UE does not have a dedicated PUCCH when feeding back HARQ-ACK for Msg4 / MsgB, but uses the resources in the public PUCCH resource set configured in the broadcast message. The public PUCCH resource set contains 16 resources. The coverage performance can be improved by repeatedly transmitting the PUCCH carrying Msg4 / MsgB HARQ-ACK. However, the repeated transmission of the PUCCH carrying Msg4 / MsgB HARQ-ACK means that the access delay of the UE increases. On the other hand, the public PUCCH resources are shared between UEs. Repeated occupation of resources in the public PUCCH resource set will also result in other UEs not having enough PUCCH resources in the initial access phase, thereby limiting the access speed of other UEs.

[0041] This application addresses the issue of how to enhance the coverage performance of PUCCH carrying Msg4 / MsgB HARQ-ACK in NTN networks.

[0042] Application scenario: Used for data information between network (gNB) side equipment and terminal (UE) side equipment.

[0043] The inventive concept of this application is that the coverage performance of the PUCCH carrying Msg4 / MsgB HARQ-ACK is related not only to the number of repeated transmissions but also to its transmit power. Therefore, the disclosed solution improves its coverage performance by controlling the transmit power of the PUCCH carrying Msg4 HARQ-ACK. This can be further combined with repeated transmissions of the PUCCH carrying Msg4 / MsgB HARQ-ACK to meet the channel coverage performance requirements.

[0044] In this application, the PUCCH carrying Msg4 / MsgB HARQ-ACK is defined as the target PUCCH, where Msg4 / MsgB refers to the information sent to the UE before the UE obtains its own dedicated private PUCCH resources.

[0045] It should be noted that the steps of each embodiment of the present application are used for a network entity of a wireless communication system, including a terminal side device, a network side device or other intermediate device; the steps of the embodiments of the present application can also be used for a service device that provides information processing for the network entity device; the steps of the embodiments of the present application can also be used for any device, system, subsystem, circuit, chip or software entity that provides information reception, transmission, identification, and processing for a terminal side device or a network side device.

[0046] FIG2 is a flow chart of an embodiment of the method of the present application used for a terminal-side device.

[0047] The method described in any one of the embodiments of the first aspect of the present application is used for a terminal side device and includes the following steps 210 to 240: the terminal side device sends a transmission power indication value to obtain the power adjustment value and / or number of repetitions of the target PUCCH.

[0048] Step 210: Send a power indication value on a basic channel, where the basic channel is any one of the following: an access preamble of a type 1 random access procedure, Msg3 of a type 1 random access procedure, or MsgA of a type 2 random access procedure.

[0049] For example, as shown in Figure 4, the basic channel is Msg1 or Msg3. If the basic channel is Msg1 for a Type 1 random access procedure, the base station and UE pre-group random access preambles. The UE uses access preambles from different groups to represent different power indicator values. In other words, the different states of the power indicator values ​​are carried by the group containing the access preamble. By detecting the random access preamble, the gNB can determine the UE's transmit power capability and / or the UE's request to adjust transmit power. In the random access response, the gNB can then adjust the power of the UE-side device transmitting Msg3 and / or the target PUCCH power based on this power indicator value. Furthermore, the gNB can determine parameters such as the number of target PUCCH retransmissions based on this power indicator value to meet the coverage requirements of the target PUCCH channel. If the basic channel is Msg3 for a Type 1 random access procedure, the gNB can adjust the power of the target PUCCH transmitted by the UE-side device by obtaining the power indicator value. Optionally, the logical channel identifier in Msg3 can be used as a preset value to identify the power indicator value corresponding to the currently transmitted logical channel.

[0050] Preferably, the power indication value is used to indicate at least one of the following: a maximum transmit power configured on the terminal side, a power headroom value of a device on the terminal side, and a requested power adjustment value (power adjustment request).

[0051] The target PUCCH transmission power is as shown in formula (1), where P CMAX，f，c (i) is the maximum transmit power of transmission opportunity i on carrier f cell c configured by the terminal side device.

[0052] On the one hand, the transmission power of the target PUCCH needs to meet its own performance requirements, and on the other hand, it is also necessary to consider the interference between the target PUCCH and the channels transmitted by other UEs at the same time. CMAX，f，c Part of the value of (i) is configured by the UE itself. If the gNB does not obtain P CMAX，f，c (i) value, and does not know how to control the UE's transmit power. According to existing technologies, the UE reports its configured P to the gNB only after establishing a connection with the gNB. CMAX，f，c (i), gNB determines the transmit power of the private PUCCH and other private channels sent by the terminal side device based on this value. In this application, the UE feeds back its own P to the gNB during the random access phase. CMAX，f，c (i) The gNB can use this power indicator to determine the target PUCCH power adjustment amount. Furthermore, the UE can use this power indicator to determine the number of target PUCCH retransmissions. Combined with the target PUCCH power adjustment amount, this can help meet the capacity constraints of the common PUCCH and the access speed requirements of the UE and other UEs.

[0053] Optionally, the power indicator value can also be used to determine the UE's power headroom value. During the random access phase, the UE's transmit power adjustment capability can be represented by the power headroom value. When the basic channel is Msg3 in a Type 1 random access procedure or MsgA in a Type 2 random access procedure, the gNB has obtained the access preamble sent by the terminal device before sending the basic channel, or has obtained the access preamble and Msg3 / MsgB. The UE's ability to adjust the target PUCCH transmit power can be represented by the difference between the maximum transmit power configured by the terminal device and the transmit power of any item in PRACH, Msg3 / MsgB. The gNB can use this power indicator value to determine the target PUCCH power adjustment amount and / or the number of target PUCCH retransmissions. In combination with the target PUCCH power adjustment amount, the gNB can meet the capacity constraints of the common PUCCH and the access speed requirements of the UE and other UEs.

[0054] When the power indicator value is a power adjustment request, the power adjustment request includes any of: increasing, decreasing, or maintaining transmit power. Preferably, in step 210, the power indicator value is transmitted in response to the downlink reference signal received power being greater than or less than a first threshold value; the power indicator value indicates a requested power adjustment value, which is used to decrease or increase the target PUCCH power. For example, optionally, the UE may obtain the first threshold value, and determine whether to transmit the power indicator value to the network device based on whether the measured downlink reference signal received power is below the first threshold value. Alternatively, the UE may determine whether to transmit the power indicator value to the network device based on other reference quantities. For example, when the measured downlink reference signal received power is below the first threshold value, the UE may request the gNB to increase the target PUCCH transmission power using the power indicator value. When the measured downlink reference signal received power is above the first threshold value, the UE may request the gNB to decrease the target PUCCH transmission power using the power indicator value. The power adjustment request includes any of: increasing, decreasing, or maintaining transmit power. The UE may further transmit the requested power adjustment value to the network device. The first threshold value may be sent by the gNB through broadcast information, and is used by the UE to determine whether to send power indication information based on the comparison between the measurement result and the first threshold value.

[0055] Further preferably, the power indicator value also includes a target PUCCH retransmission request state, indicating the number of target PUCCH repetitions. The power indicator value transmitted on the fundamental channel can be jointly indicated with the target PUCCH retransmission request information. For example, a first power indicator value corresponds to power indicator state 1 and retransmission request state 1; a second power indicator value corresponds to power indicator state 2 and retransmission request state 2, etc. It should be noted that the target PUCCH repetition number includes 1, indicating no repeated transmission.

[0056] Step 220: Receive random access process Msg2, Msg4 or MsgB.

[0057] Step 230: Obtain a power adjustment value of a target PUCCH, where the target PUCCH belongs to a common PUCCH resource and is used to carry a HARQ-ACK message of a type 1 random access procedure Msg4 or a type 2 random access procedure MsgB.

[0058] The target PUCCH belongs to the common PUCCH resource set and is configured by the gNB through broadcast information. For example, the PUCCH resources configured by "pucch-ResourceCommon" as described in 3GPP TS 38.213.h00, Section 9.2.1. The power adjustment value of the target PUCCH is carried by the scheduling information corresponding to the HARQ-ACK data contained in the target PUCCH and / or by the group control information that adjusts the PUCCH transmit power.

[0059] Here, HARQ-ACK is a response to the corresponding data, and the corresponding data refers to Msg4-k or MsgB.

[0060] We call the PUCCH used to feedback Msg4 / MsgB HARQ-ACK, determined from the public PUCCH resource set, the target PUCCH. Alternatively, the PUCCH used for Msg4 / MsgB HARQ-ACK before the UE is configured with private PUCCH resources is called the target PUCCH. Msg4-k is the PDSCH that carries the UE's private PUCCH configuration. After obtaining this configuration information, the UE will feedback HARQ-ACK for Msg4-k accordingly, where k = 1 to K.

[0061] Step 240: Send the target PUCCH according to the power adjustment value, which includes the HARQ-ACK for the random access process Msg4 or MsgB.

[0062] The target PUCCH is transmitted between a first time and a second time, the first time being determined by the transmission time of the HARQ-ACK corresponding to the first transmission of the physical downlink shared channel data after Msg3 or MsgA, and the second time being determined by the time of the HARQ-ACK corresponding to the transmission of the first information, wherein the first information is private PUCCH configuration information. Figure 3 is a flow chart of an embodiment of the method of the present application for a network-side device.

[0063] The method described in any embodiment of the first aspect of the present application is used by a network-side device to obtain the transmission power indication value, determine and send the power adjustment value and / or repetition number of the target PUCCH according to the power indication value. Specifically, it includes the following steps 310 to 340:

[0064] Step 310: Receive basic channel information, where the basic channel is any one of the following: access preamble of type 1 random access procedure, Msg3 of type 1 random access procedure, or MsgA of type 2 random access procedure.

[0065] Optionally, the network device sends a first threshold value to facilitate the UE to determine whether to send a power indication value to the network device based on whether the received power of the downlink reference signal is below the first threshold value. Before successful random access, the gNB cannot determine the UE's location, and the reliability of the target PUCCH differs from the reliability of the PRACH and Msg3 / MsgA previously sent by the UE. If the power indication value sent by the terminal device is a power adjustment request, the gNB can obtain the UE's target PUCCH transmit power usage, facilitating gNB control of the target PUCCH power. The gNB sends this first threshold value via broadcast information.

[0066] Step 320: Receive and determine a power indicator value in a basic channel.

[0067] After the gNB obtains the power indicator value on the basic channel, it can determine the power adjustment value for the terminal side device to send the target PUCCH according to the power indicator value. If the gNB does not have the power indicator value of the UE, the gNB's transmit power control command to the UE can only be based on the power of the UE's uplink reference signal. The gNB does not have the P indicator value of the UE. CMAX，f，c The value of (i) does not know how to control the UE's transmit power. For example, the gNB simply sends a power adjustment value to instruct the UE to increase its transmit power, but the UE's transmit power has already reached its maximum and cannot guarantee coverage within the gNB's coverage. In this case, if the gNB knows the power indication value, it can meet the coverage requirement by increasing the number of target PUCCH repetitions sent by the terminal-side device. The power indication value can be used to determine the maximum transmit power configured by the terminal-side device, to determine the UE's power headroom value, or to request a power adjustment.

[0068] Step 330: Determine the power adjustment value of the target PUCCH.

[0069] After obtaining the power indicator value of the UE, the gNB sends a power adjustment value for the UE's target PUCCH. The power adjustment value is determined in a first set. The first set is different from a second set, which is used to determine the power adjustment value for the private PUCCH.

[0070] Before the disclosure of the solution in this application, the target PUCCH transmit power P determined on the transmission opportunity i in the uplink subband b carrier f cell c is adjusted by power control in state l. PUCCH，b，f，c (i,q u ,q d , 1) is as follows:

[0071] in:

[0072] P0 is the value configured by the higher layer signaling, or P0 = 0;

[0073] P CMAX，f，c (i) is the maximum transmit power of transmission opportunity i on carrier f cell c configured by the terminal side device;

[0074] is the number of RBs in cell c of carrier f on uplink subband b occupied by the target PUCCH at transmission opportunity i;

[0075] μ is the subcarrier configuration index;

[0076] PL is the downlink path loss measured by the UE;

[0077] is the number of symbols occupied by the target PUCCH. If the target PUCCH uses format 0, Δ UCI (i) = 0, If the target PUCCH uses format 1, ΔU CI( i)=10log 10 (O UCI (i)), O UCI (i) is the number of UCI bits transmitted on the target PUCCH, is the number of symbols in a time slot.

[0078] When l = 0, the power accumulation amount g b，f，c (i, l) = g b，f，c (i-i0, l)+ΔP, where g b，f，c (i-i0, l) is the accumulated power of PUCCH at transmission opportunity i-i0, and ΔP is the sum of the power adjustment values ​​obtained by the UE between transmission opportunity i-i0 and transmission opportunity i. b，f，c (0, l) = ΔP rampup，b，f，c +δ b，f，c , where δ b，f，c It is the power adjustment value in the random access response, located in the access response indication of the type 1 random access procedure, or MsgB of the type 2 random access procedure. ΔP rampup，b，f，c =min[max(0, P CMAX，f，c -P0-PL), ΔPrampup_requested, b, f, c]. ΔP rampup，b，f，c Determined by high-level configuration information, it is related to the cumulative increase in power of the random access preamble sent by the terminal-side device.

[0079] As can be seen, before a UE acquires its own private PUCCH resources, the transmit power of the PUCCH carrying Msg4 HARQ-ACK is primarily dependent on the downlink path loss, the indicator value in the random access response, and higher-layer configuration information. During this process, the gNB cannot determine the UE's own transmit power potential. Therefore, the indicator value in the random access response can only be estimated based on the received UE signal power during the random access process, affecting the coverage performance of the PUCCH carrying Msg4 HARQ-ACK.

[0080] This application facilitates the gNB to determine the power indication value for the target PUCCH by carrying the maximum transmit power, power adjustment capability, or power adjustment request of the carrier f cell c configured by the terminal side device in the Msg1 / Msg3 / MsgA of the random access process.

[0081] Step 340: Send a power adjustment value of a target PUCCH, where the target PUCCH belongs to a common PUCCH resource and is used to carry a HARQ-ACK message of a type 1 random access procedure Msg4 or a type 2 random access procedure MsgB.

[0082] The power adjustment value of the target PUCCH is carried by the scheduling information of the HARQ-ACK corresponding data included in the target PUCCH, and / or by the group control information for adjusting the PUCCH transmission power.

[0083] FIG4 is a schematic diagram of information interaction between the network side and the terminal side.

[0084] In the method described in any embodiment of the first aspect of the present application, preferably, the transmission time of the target PUCCH is between a first time point and a second time point; at the first time point, the terminal side device first receives Msg4 of a type 1 random access procedure or MsgB of a type 2 random access procedure; at the second time point, the terminal side device determines the private PUCCH configuration. The time for sending HARQ-ACK information using the private PUCCH configuration resources is after the second time point.

[0085] The first time in Figure 4 is when the terminal receives Msg4-1 after sending Msg3. Msg4-1 refers to the first PDSCH scheduled by DCI scrambled with the TC-RNTI after Msg3. Subsequent PDSCHs carry Msg4-2, Msg4-3, and so on. The HARQ-ACK feedback corresponding to each PDSCH in Msg4-1, Msg4-2, ..., and Msg4-K uses resources from the common PUCCH resource set. Msg4-k is the PDSCH carrying the UE-specific PUCCH configuration. After receiving this configuration information, the UE will feedback the HARQ-ACK for Msg4-k accordingly. For example, the PUCCH resources configured by "PUCCH-Config" described in 3GPP TS 38.213.h00, 9.2.1. If the UE successfully completes random access, the gNB will allocate private PUCCH resources to the UE at the second time. The UE-specific PUCCH configuration refers to parameters such as resources and formats in the time, frequency, and code domains. Before this second time, the HARQ-ACK corresponding to the PDSCH sent by the network side device to the UE is fed back on the target PUCCH. After sending the HARQ-ACK for Msg4k, the HARQ-ACK feedback for other PDSCHs of the UE uses a private PUCCH, where k = 1 to K, and K is the maximum sequence number responded by the target PUCCH when sending Msg4 multiple times.

[0086] The target PUCCH is transmitted between a first time and a second time. The first time is determined by the transmission time of the HARQ-ACK corresponding to the first transmission of the physical downlink shared channel data, which occurs after Msg3 or MsgA. The first time may be the transmission time of the HARQ-ACK. Alternatively, the first time may be a time offset by a preset value after the transmission time of the HARQ-ACK. In NTN transmission systems, the wireless signal transmission delay is extended, and the preset offset value is used to compensate for the air interface signal transmission delay between the UE and the gNB. The second time is determined by the transmission time of the HARQ-ACK corresponding to the first information. The first information is the private PUCCH configuration information. After the second time, the UE may use the resources configured by the private PUCCH to feedback the HARQ-ACK information.

[0087] After sending the power indication value, the UE obtains the power adjustment value of the target PUCCH. The power adjustment value of the target channel can be obtained from the scheduling indication of each Msg4-1, Msg4-2, ..., Msg4-K, and / or can be obtained from the group control information used to adjust the PUCCH transmit power.

[0088] Because the coverage of the target PUCCH is limited, multiple repeated transmissions are often required to ensure its coverage, which inevitably prolongs the UE's access time and limits the public PUCCH resources available to other UEs. The issues of extended access time and long-term occupation of public PUCCH resources can be improved by appropriately adjusting the transmit power of the target PUCCH. Preferably, the target PUCCH power adjustment value belongs to a first set, the private PUCCH power adjustment value belongs to a second set, and at least one value in the first set is greater than the maximum value in the second set.

[0089] Compared with private PUCCH, the step size of the power adjustment value of target PUCCH can be larger. The power adjustment value for target PUCCH is determined in the first set. The power adjustment value for private PUCCH is determined in the second set. The first set is different from the second set. For example, the second set is {-1, 0, 1, 3} [dB]. The first set is {0, 3, 6, 9} [dB]. At least one value in the first set is greater than the maximum value in the second set. Different sets are used for the power adjustment values ​​of target PUCCH and private PUCCH to conveniently reflect the different coverage requirements of target PUCCH and private PUCCH, as well as the different requirements for UE access time. As shown in formula (1), when l = 0, the power accumulation amount g b，f，c (i, l) = g b，f，c (i-i0, l)+ΔP, where g b，f，c (i-i0, l) is the accumulated power of PUCCH at transmission opportunity i-i0, and ΔP is the sum of the power adjustment values ​​obtained by the UE between transmission opportunity i-i0 and transmission opportunity i. b，f，c (0, l) = ΔP rampup，b，f，c +δ b，f，c , where δ b，f，c ΔP is the power adjustment value in the random access response. rampup，b，f，c Determined by higher-layer configuration information. The power adjustment value obtained by the UE between transmission opportunity i-i0 and transmission opportunity i, and the power adjustment value in the random access response, are each from the first set for the target PUCCH and from the second set for the private PUCCH. The gNB uses different transmit powers and / or repetition strategies for the target and private PUCCHs to address issues where some physical channels may not meet coverage requirements. For example, in NTN scenarios, the coverage performance of the PUCCH carrying Msg4 HARQ-ACK may not meet coverage requirements.

[0090] FIG5 is a schematic diagram of an embodiment of a network-side device.

[0091] An embodiment of the present application also proposes a network-side device for implementing the method of any one of the embodiments of the present application, wherein at least one module in the network-side device is used for at least one of the following functions: obtaining a power indication value in Msg1, Msg3 or MsgA of the random access process; determining a power adjustment value of the target PUCCH, and sending the power adjustment value of the target PUCCH in Msg2, Msg4 or MsgB of the random access process; determining a private PUCCH resource, and sending the configuration of the private PUCCH resource in Msg2, Msg4 or MsgB of the random access process.

[0092] To implement the above technical solution, the present application proposes a network side device 400, which includes a network sending module 401, a network determining module 402, and a network receiving module 403 that are interconnected.

[0093] The network sending module is used to send Msg2, Msg4 or MsgB of the random access process; further, it is also used to send a first threshold value; the first threshold value is used to determine whether to send the power indication value according to the measurement result.

[0094] The network determination module is configured to determine a power indication value according to the received message, and further determine a power adjustment value of the target PUCCH according to the power indication value in combination with formula (1).

[0095] The network receiving module is used to receive Msg1, Msg3 or MsgA in the random access process.

[0096] The specific methods for implementing the functions of the network sending module, network determination module, and network receiving module are as described in the various method embodiments of this application and will not be repeated here.

[0097] The network-side equipment described in this application may refer to base station facilities, network-side equipment or servers connected to the base station, or a system that provides services for the above-mentioned equipment, or any system, subsystem, module, circuit, chip or software running device that provides information reception, transmission, identification and processing for the above-mentioned equipment.

[0098] FIG6 is a schematic diagram of an embodiment of a terminal-side device.

[0099] The present application also proposes a terminal side device for implementing the method of any one embodiment of the present application, wherein at least one module in the terminal side device is used for at least one of the following functions: at least one module in the terminal side device is used for at least one of the following functions: determining a power indication value, sending a power indication value in Msg1, Msg3 or MsgA of a random access process; obtaining and determining a power adjustment value of a target PUCCH in a received random access process Msg2, Msg4 or MsgB; and determining the configuration of private PUCCH resources.

[0100] To implement the above technical solution, the present application proposes a terminal side device 500, which includes a terminal sending module 501, a terminal determination module 502, and a terminal receiving module 503 that are interconnected.

[0101] The terminal receiving module is used to receive Msg2, Msg4 or MsgB in the random access process, and is also used to receive a first threshold value; the first threshold value is used to determine whether to send the power indication value according to the measurement result.

[0102] The terminal determination module is used to determine a power indication value, and to determine a power adjustment value of a target PUCCH according to a received message.

[0103] The terminal sending module is used to send Msg1, Msg3 or MsgA of the random access process.

[0104] The specific methods for implementing the functions of the terminal sending module, the terminal determining module, and the terminal receiving module are as described in the various method embodiments of this application and will not be repeated here.

[0105] The terminal side device described in this application may refer to a user equipment (UE), a personal mobile terminal, a smart terminal, a mobile phone, a computer with communication function, or a system that provides services for the above devices, or any system, subsystem, module, circuit, chip or software running device that provides information reception, transmission, identification and processing for the above devices.

[0106] Figure 7 shows a schematic structural diagram of a network side device according to another embodiment of the present invention. As shown in the figure, the network side device 600 includes a processor 601, a wireless interface 602, and a memory 603. The wireless interface may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. The wireless interface implements the communication function with the terminal side device, processes wireless signals through receiving and transmitting devices, and the data carried by the signals is communicated with the memory or processor via an internal bus structure. The memory 603 contains a computer program for executing any one of the embodiments of the present application, and the computer program runs or changes on the processor 601. When the memory, processor, and wireless interface circuit are connected through a bus system, the bus system includes a data bus, a power bus, a control bus, and a status signal bus, which will not be described in detail here.

[0107] Figure 8 is a block diagram of a terminal-side device according to another embodiment of the present invention. Terminal-side device 700 includes at least one processor 701, memory 702, a user interface 703, and at least one network interface 704. The various components in terminal-side device 700 are coupled together via a bus system. The bus system is used to enable communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.

[0108] The user interface 703 may include a display, a keyboard, or a pointing device, such as a mouse, a trackball, a touch pad, or a touch screen.

[0109] Memory 702 stores executable modules or data structures. The memory may store an operating system and application programs. The operating system includes various system programs, such as a framework layer, a core library layer, and a driver layer, for implementing various basic services and processing hardware-based tasks. Application programs include various application programs, such as media players and browsers, for implementing various application services.

[0110] In an embodiment of the present invention, the memory 702 contains a computer program for executing any one of the embodiments of the present application, and the computer program is run or changed on the processor 701 .

[0111] Memory 702 includes a computer-readable storage medium. Processor 701 reads information from memory 702 and, in conjunction with its hardware, performs the steps of the above-described method. Specifically, the computer-readable storage medium stores a computer program that, when executed by processor 701, implements the steps of any of the above-described method embodiments.

[0112] The processor 701 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the method of the present application may be completed by hardware integrated logic circuits in the processor 701 or by instructions in the form of software. The processor 701 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present invention may be directly implemented as being executed by a hardware decoding processor, or may be executed by a combination of hardware and software modules in the decoding processor.

[0113] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. In a typical configuration, the device of the present application includes one or more processors (CPUs), an input / output user interface, a network interface, and a memory.

[0114] Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0115] Therefore, the present application also provides a computer-readable medium storing a computer program, wherein when the computer program is executed by a processor, the steps of the method described in any embodiment of the present application are implemented. For example, the memory 603, 702 of the present invention may include non-permanent memory, random access memory (RAM) and / or non-volatile memory in a computer-readable medium, such as read-only memory (ROM) or flash RAM.

[0116] Based on the embodiments of the above-mentioned device of the present application, the present application also proposes a mobile communication system, comprising at least one embodiment of any terminal side device in the present application and / or at least one embodiment of any network side device in the present application.

[0117] It should be noted that the specific mobile communication technology described in the present invention is not limited, and can be WCDMA, CDMA2000, TD-SCDMA, WiMAX, LTE / LTE-A, LAA, MuLTEfire and subsequent fifth-generation, sixth-generation, and Nth-generation mobile communication technologies.

[0118] The terminal described in the present invention refers to a terminal-side product that can support the communication protocol of the land mobile communication system, a special communication modem module (Wireless Modem), which can be integrated into various types of terminal forms such as mobile phones, tablets, data cards, etc. to complete communication functions.

[0119] For the convenience of description, the fourth-generation mobile communication system LTE / LTE-A and its derivative MulteFire are used as examples, where the mobile communication terminal can be represented as UE (User Equipment) and the access device on the network side can be represented as a base station or access point.

[0120] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0121] It should also be noted that the terms "first", "second", etc. in this application are used to distinguish multiple objects with the same name and do not have any meaning of order or size unless specifically stated.

[0122] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A method for adjusting wireless signal transmission power, used in a terminal side device, characterized in that: The following steps are involved: Sending a power indication value on a basic channel, where the basic channel is any one of the following: an access preamble of a type 1 random access procedure, Msg3 of a type 1 random access procedure, or MsgA of a type 2 random access procedure; A power adjustment value of a target PUCCH is obtained, where the target PUCCH belongs to a common PUCCH resource and is used to carry a HARQ-ACK message of a type 1 random access procedure Msg4 or a type 2 random access procedure MsgB.

2. The method for adjusting wireless signal transmission power according to claim 1, wherein: In response to the downlink reference signal received power being greater than or less than a first threshold value, the power indication value is sent; the power indication value is used to indicate the requested power adjustment value, and the power adjustment value is used to reduce or increase the power value of the target PUCCH.

3. A method for adjusting wireless signal transmission power, used in a network side device, characterized in that: The following steps are involved: A power indication value is received on a basic channel, where the basic channel is any one of the following: an access preamble of a type 1 random access procedure, a Msg3 of a type 1 random access procedure, or a MsgA of a type 2 random access procedure; A power adjustment value of a target PUCCH is sent, where the target PUCCH belongs to a common PUCCH resource.

4. The method for adjusting wireless signal transmission power according to any one of claims 1 to 3, characterized in that: The power indication value is used to indicate at least one of the following: The maximum transmit power configured on the terminal side, the power margin value of the terminal side device, and the requested power adjustment value.

5. The method for adjusting wireless signal transmission power according to any one of claims 1 to 3, characterized in that: The transmission time of the target PUCCH is between a first time point and a second time point; At the first time point, the terminal side device receives Msg4 of the type 1 random access process or MsgB of the type 2 random access process for the first time; At the second time point, the terminal side device determines the private PUCCH configuration; The time for sending HARQ-ACK information using private PUCCH configuration resources is after the second time point.

6. The method for adjusting wireless signal transmission power according to any one of claims 1 to 3, characterized in that: The power adjustment value of the target PUCCH is carried by the scheduling information of the HARQ-ACK corresponding data contained in the target PUCCH, and / or is carried by the group control information for adjusting the PUCCH transmission power.

7. The method for adjusting wireless signal transmission power according to any one of claims 1 to 3, characterized in that: The target PUCCH power adjustment value belongs to a first set, the power adjustment value of the private PUCCH belongs to a second set, and at least one value in the first set is greater than a maximum value in the second set.

8. The method for adjusting wireless signal transmission power according to any one of claims 1 to 3, characterized in that: The power indication value also includes a repetition transmission request state of the target PUCCH, which is used to indicate the number of repetitions of the target PUCCH.

9. A terminal side device, used to implement the method described in any one of claims 1 to 2, 4 to 8, characterized in that: At least one module in the terminal side device is used for at least one of the following functions: determining a power indication value, sending a power indication value in Msg1, Msg3 or MsgA of a random access process; obtaining and determining a power adjustment value of a target PUCCH in Msg2, Msg4 or MsgB received in a random access process; and determining a configuration of private PUCCH resources.

10. A network side device, used to implement the method according to any one of claims 3 to 8, characterized in that: At least one module in the network side device is used for at least one of the following functions: obtaining a power indication value in Msg1, Msg3 or MsgA of a random access process; determining a power adjustment value of a target PUCCH, and sending the power adjustment value of the target PUCCH in Msg2, Msg4 or MsgB of a random access process; determining a private PUCCH resource, and sending the configuration of a private PUCCH resource in Msg2, Msg4 or MsgB of a random access process.

11. A communication device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the method according to any one of claims 1 to 8 when executed by the processor.

12. A computer-readable medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of the method according to any one of claims 1 to 8.

13. A mobile communication system, comprising at least one terminal side device as described in claim 9 and / or at least one network side device as described in claim 10.

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