SBFD-based prach retransmission method, apparatus, electronic device and computer-readable medium

Abstract

The present disclosure belongs to the technical field of computers, and provides a SBFD-based PRACH retransmission method, an apparatus, an electronic device and a computer-readable medium. The method comprises: a user terminal determines a PRACH occasion, determines PRACH transmission power on the basis of target receiving power of a PRACH, and performs PRACH retransmission on the basis of the PRACH occasion and the PRACH transmission power. The PRACH occasion is located in symbols of a first type, located in symbols of a second type, or simultaneously located in symbols of the first type and symbols of the second type; the symbols of the first type simultaneously comprise a subcarrier used for uplink transmission and a subcarrier used for downlink transmission; the symbols of the second type only comprise a subcarrier used for uplink transmission; the target receiving power is determined on the basis of power parameters independently configured for each PRACH occasion classification, each PRACH occasion classification comprising at least one and at most two PRACH occasions. The method can standardly handle the problem of configuring SBFD technology in PRACH retransmission.

Description

SBFD-based PRACH retransmission method, apparatus, electronic equipment, and computer-readable medium

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202410557949.5, filed on May 7, 2024, entitled "SPD-based PRACH retransmission method, apparatus, electronic device and computer-readable medium", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure belongs to the field of computer technology, specifically relating to a PRACH retransmission method based on SBFD, electronic devices, and computer-readable media. Background Technology

[0004] SBFD (Subband Full Duplex) refers to dividing a single TDD carrier into non-overlapping uplink and downlink subbands, and transmitting and receiving data on the uplink and downlink subbands respectively, in order to achieve full duplex on the base station side.

[0005] However, the actual deployment of SBFD is still imperfect. For example, in PRACH retransmission, issues such as how to configure SBFD resources, how to schedule data transmission based on SBFD symbols, and how to avoid interference between uplink and downlink transmissions cannot be addressed in a standardized manner. Summary of the Invention

[0006] In a first aspect, this disclosure provides a PRACH retransmission method based on SBFD, which can be applied to a user terminal. The method may include: determining the PRACH timing of the Physical Random Access Channel (PRAN), wherein the PRACH timing includes being located within a first type of symbol, within a second type of symbol, or simultaneously within both the first and second type of symbols, wherein the first type of symbol contains both subcarriers for uplink transmission and subcarriers for downlink transmission, and the second type of symbol contains only subcarriers for uplink transmission; determining the PRACH transmission power based on the target received power of the PRACH, wherein the target received power is determined according to power parameters independently configured for each PRACH timing category, and each PRACH timing category includes at least one and at most two PRACH timings; and performing PRACH retransmission based on the PRACH timing and the PRACH transmission power.

[0007] Optionally, determining the PRACH timing includes: if the initial PRACH transmission or the PRACH timing selected in the previous PRACH transmission is within a first type of symbol, determining that the PRACH timing is within a first type of symbol; if the initial PRACH transmission or the PRACH timing selected in the previous PRACH transmission is within a second type of symbol, determining that the PRACH timing is within a second type of symbol; if the initial PRACH transmission or the PRACH timing selected in the previous PRACH transmission is simultaneously within both a first type of symbol and a second type of symbol, determining that the PRACH timing is simultaneously within both a first type of symbol and a second type of symbol.

[0008] Optionally, each PRACH timing classification may include both symbols located in the first type and symbols located in the second type simultaneously.

[0009] Optionally, the PRACH timing classification includes a first category within a first type symbol, a second category within a second type symbol, and a third category simultaneously within both the first and second type symbols; or, the PRACH timing classification includes a fourth category within a first type symbol, and a fifth category within both the first and second type symbols; or, the PRACH timing classification includes a sixth category within a second type symbol, and a seventh category within both the first and second type symbols; or, the PRACH timing classification includes an eighth category within a first type symbol, and a ninth category within a second type symbol.

[0010] Optionally, the target received power can also be determined based on the power ramp value and the power ramp step size.

[0011] Optionally, the power climb value is counted uniformly under each PRACH timing category; or, the power climb value is counted independently under each PRACH timing category.

[0012] Optionally, the power ramp step size is configured uniformly under each PRACH timing category; or, the power ramp step size is configured independently under each PRACH timing category.

[0013] Optionally, the power ramp-up value is incremented by 1 if at least one of the following conditions is met: no power ramp-up count stop notification is received; the selection of the synchronization signal block SSB has not changed compared to the last PRACH access preamble transmission; and the selection of the channel state information reference signal CSI-RS has not changed compared to the last PRACH access preamble transmission.

[0014] Secondly, embodiments of this disclosure provide a PRACH retransmission device based on SBFD, which can be applied to a user terminal. The device may include: a timing determination module for determining the PRACH timing, wherein the PRACH timing includes being located within a first type of symbol, within a second type of symbol, or simultaneously within both the first and second type of symbols; the first type of symbol containing both uplink and downlink subcarriers, and the second type of symbol containing only uplink subcarriers; a power determination module for determining the PRACH transmission power based on the target received power, wherein the target received power is determined according to power parameters independently configured for each PRACH timing category, and each PRACH timing category includes at least one and at most two PRACH timings; and a retransmission execution module for performing PRACH retransmission based on the PRACH timing and the PRACH transmission power.

[0015] Optionally, the timing determination module is specifically used to determine that the PRACH timing is within a first type symbol when the initial PRACH transmission or the PRACH timing selected in the previous PRACH transmission is within a first type symbol; to determine that the PRACH timing is within a second type symbol when the initial PRACH transmission or the PRACH timing selected in the previous PRACH transmission is within a second type symbol; and to determine that the PRACH timing is within both a first type symbol and a second type symbol when the initial PRACH transmission or the PRACH timing selected in the previous PRACH transmission is within both a first type symbol and a second type symbol.

[0016] Optionally, each PRACH timing classification may include both symbols located in the first type and symbols located in the second type simultaneously.

[0017] Optionally, the PRACH timing classification includes a first category within a first type symbol, a second category within a second type symbol, and a third category simultaneously within both the first and second type symbols; or, the PRACH timing classification includes a fourth category within a first type symbol, and a fifth category within both the first and second type symbols; or, the PRACH timing classification includes a sixth category within a second type symbol, and a seventh category within both the first and second type symbols; or, the PRACH timing classification includes an eighth category within a first type symbol, and a ninth category within a second type symbol.

[0018] Optionally, the target received power can also be determined based on the power ramp value and the power ramp step size.

[0019] Optionally, the power climb value is counted uniformly under each PRACH timing category; or, the power climb value is counted independently under each PRACH timing category.

[0020] Optionally, the power ramp step size is configured uniformly under each PRACH timing category; or, the power ramp step size is configured independently under each PRACH timing category.

[0021] Optionally, the power ramp-up value is incremented by 1 if at least one of the following conditions is met: no power ramp-up count stop notification is received; the selection of the synchronization signal block SSB has not changed compared to the last PRACH access preamble transmission; and the selection of the channel state information reference signal CSI-RS has not changed compared to the last PRACH access preamble transmission.

[0022] Thirdly, this disclosure provides an electronic device including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the SBFD-based PRACH retransmission method of the first aspect.

[0023] Fourthly, this disclosure provides a computer-readable medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the SBFD-based PRACH retransmission method of the first aspect.

[0024] Fifthly, this disclosure provides a chip including a processor and a communication interface coupled to the processor, the processor being used to run programs or instructions to implement the steps of the SBFD-based PRACH retransmission method as described in the first aspect.

[0025] In a sixth aspect, this disclosure provides a computer program product containing instructions that, when run on a computer, cause the computer to perform steps such as implementing the SBFD-based PRACH retransmission method as described in the first aspect. Attached Figure Description

[0026] Figure 1 is one of the flowcharts of the PRACH retransmission method based on SBFD provided in this embodiment of the present disclosure;

[0027] Figure 2 is a second flowchart of the PRACH retransmission method based on SBFD provided in this embodiment of the present disclosure;

[0028] Figure 3 is a structural block diagram of the PRACH retransmission device based on SBFD provided in the embodiment example of this disclosure;

[0029] Figure 4 is a schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure;

[0030] Figure 5 is a hardware schematic diagram of an electronic device provided in an embodiment of this disclosure. Detailed Implementation

[0031] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0032] The terms "first," "second," etc., used in this disclosure and in the claims are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this disclosure can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] It is worth noting that PRACH is an uplink transmission channel used for random access procedures of user equipment (UE). After receiving the System Information Block (SIB), the UE selects the receive beam of the target Synchronization Signal Block (SSB) and sends a random access preamble on PRACH to establish a signaling connection between the UE and the base station. PRACH retransmission refers to the process by which the user terminal re-enters random access via PRACH after a PRACH transmission failure.

[0034] SBFD technology allows uplink and downlink information to be transmitted simultaneously on the same frequency band using non-overlapping frequency domain resources. For example, in the downlink time band of traditional single-carrier TDD, non-overlapping uplink and downlink sub-bands are divided in the frequency domain, and this downlink time band becomes the SBFD time resource. Uplink information can be transmitted in the uplink sub-band within the SBFD time resource, and downlink information can be transmitted in the downlink sub-band within the SBFD time resource. The base station can transmit and receive simultaneously on the SBFD time resource, while the user terminal can only transmit or receive on the same frequency band, thereby improving uplink coverage, increasing uplink capacity, and reducing uplink transmission latency.

[0035] As can be seen, SBFD technology allows for the configuration of continuous uplink bandwidth within downlink time slots or symbols to improve uplink capacity and thus reduce latency. However, the actual deployment of PRACH retransmission using SBFD technology still faces challenges in standardization. For example, SBFD symbols possess both uplink and downlink characteristics, enabling uplink transmission on the configured uplink bandwidth and downlink transmission on the corresponding configured downlink bandwidth. This can lead to additional interference from uplink transmission to downlink transmission, affecting the actual deployment of SBFD.

[0036] This disclosure provides a PRACH retransmission method based on SBFD, which can reasonably allocate SBFD resources and perform data transmission scheduling based on SBFD symbols to avoid uplink transmission interfering with downlink transmission, and standardize the configuration of SBFD technology in PRACH retransmission. The signaling interoperability provided by this disclosure will be described in detail below with reference to the accompanying drawings and specific embodiments and application scenarios.

[0037] Figure 1 is one of the flowcharts of the PRACH retransmission method based on SBFD provided in this embodiment of the present disclosure. This method can be applied to user terminals.

[0038] In this embodiment of the disclosure, the user terminal may include an electronic device with access to a network. In the event of a failure to access via PRACH, a retransmission is performed for random access. At this time, the user terminal may employ a PRACH retransmission method based on SBFD, which may include the selection of retransmission resources after introducing SBFD symbols into the PRACH, the determination of PRACH transmission power, and a power ramping mechanism, thereby enabling uplink transmission of SBFD symbols and rationally scheduling and configuring SBFD resources.

[0039] As shown in Figure 1, the method may include the following steps 101 to 103.

[0040] Step 101: Determine the timing of the Physical Random Access Channel (PRACH). The PRACH timing includes being located within a first type of symbol, within a second type of symbol, or simultaneously within both first and second type of symbols. Within the first type of symbol, there are both subcarriers for uplink transmission and subcarriers for downlink transmission. Within the second type of symbol, there are only subcarriers for uplink transmission.

[0041] In this embodiment, uplink and downlink transmission subbands can be divided using different symbol types. The first type of symbol contains both uplink and downlink subcarriers, thus supporting both. The second type of symbol contains only uplink subcarriers, supporting only uplink transmission. During random access, the user terminal can determine the PRACH timing, which must be on the uplink transmission subcarrier and after the SSB time domain position. Based on the division into first and second type symbols, the user terminal's PRACH timing can be located within the first type of symbol (i.e., transmission based on the uplink transmission subcarriers contained within the first type of symbol); it can also be located within the second type of symbol (i.e., transmission based on the uplink transmission subcarriers contained within the second type of symbol); or it can be located simultaneously within both the first and second type of symbols (i.e., transmission based on the uplink transmission subcarriers contained within both the first and second type of symbols).

[0042] Step 102: Determine the PRACH transmission power based on the target receive power of the PRACH. The target receive power is determined based on the power parameters configured independently for each PRACH timing category. Each PRACH timing category includes at least one and at most two PRACH timings.

[0043] Furthermore, in order for the base station to successfully detect the preamble transmitted by the user terminal based on PRACH, its PRACH transmission power should be determined according to the target received power of PRACH. This target received power can be determined based on power parameters configured independently for each PRACH timing category. That is, corresponding power parameters are configured independently for each PRACH timing category. Depending on actual service requirements and network conditions, the power parameters corresponding to different PRACH timing categories can be the same or different, and the magnitudes of the power parameters can be related or unrelated. This disclosure does not impose specific limitations on this.

[0044] PRACH timing classification is derived from the aforementioned PRACH timings. Each PRACH timing classification includes at least one and at most two of the aforementioned PRACH timings, and a PRACH timing classification may not simultaneously include PRACH timings located in the first type of symbol and PRACH timings located in the second type of symbol. Based on this, when a PRACH timing classification includes the first type, a first power parameter can be set accordingly. The target received power corresponding to the PRACH timing in the first type can be determined based on the first power parameter, thereby determining the PRACH transmission power. Other PRACH timing classifications can be deduced similarly.

[0045] Step 103: Perform PRACH retransmission based on PRACH timing and PRACH transmission power.

[0046] In this embodiment of the disclosure, the user terminal, based on determining the PRACH timing and PRACH transmission power, sends a preamble at the PRACH transmission power according to the PRACH timing, and performs PRACH retransmission to establish a signaling connection.

[0047] Figure 2 is a second flowchart of the PRACH retransmission method based on SBFD provided in this embodiment of the present disclosure. This method can be applied to user terminals.

[0048] The PRACH timing includes being located within a first type of symbol, within a second type of symbol, or simultaneously within both a first type of symbol and a second type of symbol. The first type of symbol includes uplink transmission subcarriers and downlink transmission subcarriers, and the second type of symbol includes uplink transmission subcarriers.

[0049] In this embodiment of the disclosure, the timing of PRACH can be referred to the relevant description of step 101 above. To avoid repetition, it will not be repeated here.

[0050] Step 201: If the initial PRACH transmission or the PRACH timing selected in the previous PRACH transmission is within a first type symbol, determine that the PRACH timing is within a first type symbol.

[0051] Step 202: If the initial PRACH transmission or the PRACH timing selected in the previous PRACH transmission is within a type 2 symbol, determine that the PRACH timing is within a type 2 symbol.

[0052] Step 203: If the PRACH timing selected in the initial PRACH transmission or the previous PRACH transmission is simultaneously located within the first type symbol and the second type symbol, determine that the PRACH timing is simultaneously located within the first type symbol and the second type symbol.

[0053] In this embodiment of the disclosure, when a user terminal performs PRACH retransmission, since the retransmission occurs after at least one failure to establish a signaling connection via PRACH, the transmission timing of this PRACH retransmission can be determined based on the PRACH timing selected in the initial PRACH transmission or the previous PRACH transmission. For example, if the PRACH timing selected in the initial PRACH transmission or the previous PRACH transmission is within a first type symbol, the PRACH timing is determined to be within a first type symbol; if the PRACH timing selected in the initial PRACH transmission or the previous PRACH transmission is within a second type symbol, the PRACH timing is determined to be within a second type symbol; if the PRACH timing selected in the initial PRACH transmission or the previous PRACH transmission is simultaneously within both first and second type symbols, the PRACH timing is determined to be simultaneously within both first and second type symbols. In optional method embodiments, those skilled in the art can also adjust the PRACH timing in the event of retransmission failure, and this embodiment of the disclosure does not impose specific limitations on this.

[0054] Step 204: Determine the PRACH transmission power based on the target receive power of the PRACH. The target receive power is determined based on the power parameters configured independently for each PRACH timing category. Each PRACH timing category includes at least one and at most two PRACH timings.

[0055] In this embodiment of the disclosure, step 204 can be referred to the relevant description of step 102 above. To avoid repetition, it will not be repeated here.

[0056] In one optional embodiment of the method disclosed herein, each PRACH timing classification may include both symbols located in the first type and symbols located in the second type simultaneously.

[0057] In this embodiment of the disclosure, when classifying PRACH timings, two PRACH timings located within a first type symbol and two PRACH timings located within a second type symbol are not simultaneously classified into one PRACH timing category. That is, when a PRACH timing category includes the one located within a first type symbol, it does not include the one located within a second type symbol, and vice versa.

[0058] In an optional embodiment of the method disclosed herein, the PRACH timing classification includes a first category located within a first type symbol, a second category located within a second type symbol, and a third category located simultaneously within both the first and second type symbols.

[0059] In this embodiment, the three PRACH opportunities can be divided into three categories: a first category, a second category, and a third category. The PRACH opportunity corresponding to the first category is located within a first type of symbol, the PRACH opportunity corresponding to the second category is located within a second type of symbol, and the PRACH opportunity corresponding to the third category is located within both the first and second type of symbols. Based on this, a first power parameter can be set for the first category, a second power parameter for the second category, and a third power parameter for the third category. The first, second, and third power parameters can be set independently based on service requirements, network conditions, etc. The target received power can then be determined through the following steps:

[0060] Step A1: When the PRACH timing is within the first type of symbol, determine the target received power based on the first power parameter.

[0061] Step A2: When the PRACH timing is within the second type of symbol, determine the target received power based on the second power parameter.

[0062] Step A3: When the PRACH timing is simultaneously located within the first type symbol and the second type symbol, determine the target received power based on the third power parameter.

[0063] Alternatively, in one optional embodiment of the method disclosed herein, the PRACH timing classification includes a fourth category located within a first type symbol, and a fifth category located within a second type symbol and simultaneously within both the first and second type symbols.

[0064] In this embodiment, the three PRACH opportunities located within the first type of symbol can be classified as a fourth category, and the two PRACH opportunities located within the second type of symbol, and simultaneously within both the first and second type of symbol, can be classified as a fifth category. Based on this, a fourth power parameter can be set for the fourth category, and a fifth power parameter can be set for the fifth category. The settings of the fourth and fifth power parameters can be independently set based on service requirements, network conditions, etc. In this case, the target received power can be determined through the following steps:

[0065] Step B1: When the PRACH timing is within the first type of symbol, determine the target received power based on the fourth power parameter.

[0066] Step B2: When the PRACH timing is within the second type of symbol, or simultaneously within the first type of symbol and the second type of symbol, determine the target received power based on the fifth power parameter.

[0067] Alternatively, in one optional method embodiment of this disclosure, the PRACH timing classification includes a sixth category located within the second type symbol, and a seventh category located within the first type symbol and simultaneously within both the first and second type symbols.

[0068] In this embodiment, the three PRACH opportunities located within the second type of symbol can be classified as the sixth category, and the two PRACH opportunities located within the first type of symbol, and simultaneously within both the first and second type of symbol, can be classified as the seventh category. Based on this, a sixth power parameter can be set for the sixth category, and a seventh power parameter can be set for the seventh category. The settings of the sixth and seventh power parameters can be independently set based on service requirements, network conditions, etc. In this case, the target received power can be determined through the following steps:

[0069] Step C1: When the PRACH timing is within the second type of symbol, determine the target received power based on the sixth power parameter.

[0070] Step C2: When the PRACH timing is within the first type of symbol, or simultaneously within the first type of symbol and the second type of symbol, determine the target received power based on the seventh power parameter.

[0071] In an optional embodiment of the method disclosed herein, the PRACH timing classification includes an eighth category within a first type of symbol and a ninth category within a second type of symbol.

[0072] In this embodiment, PRACH opportunities located within the first type of symbol can be classified as the eighth category, and those located within the second type of symbol can be classified as the ninth category. PRACH opportunities located within both the first and second type of symbol are not classified and are not retransmitted in actual service. Based on this, an eighth power parameter can be set for the eighth category, and a ninth power parameter can be set for the ninth category. The eighth and ninth power parameters can be set independently based on service requirements, network conditions, etc. The target received power can then be determined through the following steps:

[0073] Step D1: When the PRACH timing is within the first type of symbol, determine the target received power based on the eighth power parameter.

[0074] Step D2: When the PRACH timing is within the second type of symbol, determine the target received power based on the ninth power parameter.

[0075] In one optional embodiment of the method disclosed herein, the target received power can also be determined based on the power ramp value and the power ramp step size.

[0076] In this embodiment of the disclosure, during PRACH retransmission, the power can be increased in each retransmission to improve the success rate of signal transmission. Based on this, a power ramp-up value and a power ramp-up step size can be set, where the power ramp-up step size is the increment of the power increase each time. The power ramp-up value can be determined by counting the power ramp-ups based on the number of retransmissions. Therefore, in this PRACH retransmission, the target received power can be determined by accumulating the power ramp-up step size based on the corresponding power ramp-up value. For example, if the power ramp-up value is recorded as 1 in the initial PRACH transmission, and the power ramp-up value is accumulated by 1 in each retransmission, then the target received power in each PRACH retransmission can be determined by subtracting 1 from the power ramp-up value and the power ramp-up step size.

[0077] Specifically, in one optional embodiment of the method disclosed herein, the power ramp value is incremented by 1 if at least one of the following conditions is met:

[0078] No notification of power ramp-up notification received;

[0079] Compared to the previous PRACH access preamble transmission, the selection of the synchronization signal block (SSB) remains unchanged.

[0080] Compared to the previous PRACH access preamble transmission, the selection of the Channel State Information Reference Signal (CSI-RS) remains unchanged.

[0081] In this embodiment of the disclosure, during each PRACH retransmission, the power ramp-up value can be incremented by 1 each time, provided that the aforementioned conditions are met. Conversely, if a stop power ramp-up counting notification is received, or if the selection of SSB or CSI-RS (Channel State Information-Reference Signal) changes compared to the previous PRACH access preamble transmission, counting stops and the power ramp-up value is not incremented.

[0082] In actual deployment, the power ramp value can be counted using a configured ramp counter.

[0083] Based on this, and building upon the aforementioned steps A1 to A3, the target received power can be determined through the following steps:

[0084] Step A1': When the PRACH timing is within the first type of symbol, determine the target received power based on the first power parameter, the first power ramp value, and the first power ramp step size.

[0085] Step A2': When the PRACH timing is within the second type of symbol, determine the target received power based on the second power parameter, the second power ramp value, and the second power ramp step size.

[0086] Step A3': When the PRACH timing is simultaneously within the first type symbol and the second type symbol, determine the target received power based on the third power parameter, the third power ramp value, and the third power ramp step size.

[0087] Alternatively, based on the aforementioned steps B1 to B2, the target received power can be determined through the following steps:

[0088] Step B1': When the PRACH timing is within the first type of symbol, determine the target received power based on the fourth power parameter, the fourth power ramp value, and the fourth power ramp step size.

[0089] Step B2': When the PRACH timing is within the second type of symbol, or simultaneously within the first type of symbol and the second type of symbol, determine the target received power based on the fifth power parameter, the fifth power ramp value, and the fifth power ramp step size.

[0090] Alternatively, based on the aforementioned steps C1 to C2, the target received power can be determined through the following steps:

[0091] Step C1': When the PRACH timing is within the second type symbol, determine the target received power based on the sixth power parameter, the sixth power ramp value, and the sixth power ramp step size.

[0092] Step C2': When the PRACH timing is within the first type of symbol, or simultaneously within the first type of symbol and the second type of symbol, determine the target received power based on the seventh power parameter, the seventh power ramp value, and the seventh power ramp step size.

[0093] Alternatively, based on the aforementioned steps D1 to D2, the target received power can be determined through the following steps:

[0094] Step D1': When the PRACH timing is within the first type of symbol, determine the target received power based on the eighth power parameter, the eighth power ramp value, and the eighth power ramp step size.

[0095] Step D2': When the PRACH timing is within the second type symbol, determine the target received power based on the ninth power parameter, the ninth power ramp value, and the ninth power ramp step size.

[0096] In one alternative embodiment of this disclosure, the power ramp value is counted uniformly under each PRACH timing category.

[0097] In this embodiment of the disclosure, under each PRACH timing category, the power ramp-up value can be counted uniformly. That is, the PRACH retransmissions across different PRACH timing categories collectively accumulate the power ramp-up value. When a ramp-up counter is set, PRACH retransmissions belonging to different PRACH timing categories all trigger the count. For example, the first, second, and third power ramp-up values ​​in steps A1' to A3' are counted uniformly; or, the fourth and fifth power ramp-up values ​​in steps B1' to B2' are counted uniformly; or, the sixth and seventh power ramp-up values ​​in steps C1' to C2' are counted uniformly; or, the eighth and ninth power ramp-up values ​​in steps D1' to D2' are counted uniformly.

[0098] Alternatively, in one optional embodiment of the method disclosed herein, the power ramp value is counted independently under each PRACH timing category.

[0099] In this embodiment of the disclosure, the power ramp-up value can also be counted independently under each PRACH timing category. That is, the power ramp-up value is accumulated for PRACH retransmissions between different PRACH timing categories. When a ramp-up counter is set, the PRACH retransmissions belonging to different PRACH timing categories trigger the corresponding ramp-up counter to count. For example, the first, second, and third power ramp-up values ​​in steps A1' to A3' trigger the corresponding ramp-up counter to count; or, the fourth and fifth power ramp-up values ​​in steps B1' to B2' trigger the corresponding ramp-up counter to count; or, the sixth and seventh power ramp-up values ​​in steps C1' to C2' trigger the corresponding ramp-up counter to count; or, the eighth and ninth power ramp-up values ​​in steps D1' to D2' trigger the corresponding ramp-up counter to count.

[0100] In one optional embodiment of the method disclosed herein, the power ramp step size is uniformly configured under each PRACH timing category.

[0101] In this embodiment of the disclosure, the power ramp-up step size can be uniformly configured under each PRACH timing category, that is, the power ramp-up step size is shared for PRACH retransmissions across different PRACH timing categories. For example, the first, second, and third power ramp-up step sizes in steps A1' to A3' are uniformly set; or, the fourth and fifth power ramp-up step sizes in steps B1' to B2' are uniformly set; or, the sixth and seventh power ramp-up step sizes in steps C1' to C2' are uniformly set; or, the eighth and ninth power ramp-up step sizes in steps D1' to D2' are uniformly set.

[0102] Alternatively, in one optional embodiment of the method disclosed herein, the power ramp step size is configured independently under each PRACH timing category.

[0103] In this embodiment of the disclosure, the power ramp-up step size can also be configured independently under each PRACH timing category, that is, the power ramp-up step size is configured separately for PRACH retransmissions between different PRACH timing categories. For example, the first, second, and third power ramp-up step sizes of the aforementioned steps A1' to A3' are set separately; or, the fourth and fifth power ramp-up step sizes of the aforementioned steps B1' to B2' are set separately; or, the sixth and seventh power ramp-up step sizes of the aforementioned steps C1' to C2' are set separately; or, the eighth and ninth power ramp-up step sizes of the aforementioned steps D1' to D2' are set separately.

[0104] It should be noted that configuring them independently does not mean that the power ramp-up step size must be different under different configurations. For example, the first, second, and third power ramp-up step sizes in steps A1' to A3' can be the same or different when set independently; similarly, the fourth and fifth power ramp-up step sizes in steps B1' to B2' can be the same or different, the sixth and seventh power ramp-up step sizes in steps C1' to C2' can be the same or different, and the eighth and ninth power ramp-up step sizes in steps D1' to D2' can be the same or different.

[0105] Step 205: Perform PRACH retransmission based on PRACH timing and PRACH transmission power.

[0106] In this embodiment of the disclosure, step 205 can be referred to the relevant description of step 103 above. To avoid repetition, it will not be repeated here.

[0107] The SBFD-based PRACH retransmission method disclosed herein involves a user terminal determining the PRACH timing and the PRACH transmission power based on the target received power. PRACH retransmission is then performed based on the PRACH timing and transmission power. The PRACH timing includes being located within a first type of symbol, a second type of symbol, or both. The first type of symbol contains both uplink and downlink subcarriers, while the second type of symbol contains only uplink subcarriers. The target received power is determined based on power parameters independently configured for each PRACH timing category. Each PRACH timing category includes at least one and at most two PRACH timings. This method allows for the rational allocation of SBFD resources during PRACH retransmission and data transmission scheduling based on SBFD symbols to avoid uplink interference with downlink transmission, thus standardizing the configuration of SBFD technology during PRACH retransmission.

[0108] Figure 3 illustrates a PRACH retransmission device 300 based on SBFD provided in an embodiment of this disclosure. This device can be applied to a user terminal and may include: a timing determination module 301, used to determine the PRACH timing of the Physical Random Access Channel (PRAN), wherein the PRACH timing includes being located within a first type of symbol, within a second type of symbol, or simultaneously within both the first and second type of symbols, wherein the first type of symbol contains both subcarriers for uplink transmission and subcarriers for downlink transmission, and the second type of symbol contains only subcarriers for uplink transmission; a power determination module 302, used to determine the PRACH transmission power based on the target received power of the PRACH, wherein the target received power is determined according to power parameters independently configured for each PRACH timing category, and each PRACH timing category includes at least one and at most two PRACH timings; and a retransmission execution module 303, used to execute PRACH retransmission based on the PRACH timing and the PRACH transmission power.

[0109] In an optional embodiment of this disclosure, the timing determination module 301 is specifically configured to: determine that the PRACH timing is within a first type symbol when the initial PRACH transmission or the PRACH timing selected in the previous PRACH transmission is within a first type symbol; determine that the PRACH timing is within a second type symbol when the initial PRACH transmission or the PRACH timing selected in the previous PRACH transmission is within a second type symbol; and determine that the PRACH timing is within both a first type symbol and a second type symbol when the initial PRACH transmission or the PRACH timing selected in the previous PRACH transmission is simultaneously within both a first type symbol and a second type symbol.

[0110] In an optional embodiment of the apparatus disclosed herein, the PRACH timing classification includes a first category located within a first type symbol, a second category located within a second type symbol, and a third category located simultaneously within both the first and second type symbols; or, the PRACH timing classification includes a fourth category located within a first type symbol, and a fifth category located within both the first and second type symbols; or, the PRACH timing classification includes a sixth category located within a second type symbol, and a seventh category located within both the first and second type symbols.

[0111] In an optional embodiment of the present disclosure, the target received power can also be determined based on the power ramp value and the power ramp step size.

[0112] In one optional embodiment of this disclosure, the power ramp value is counted uniformly under each PRACH timing category; or, the power ramp value is counted independently under each PRACH timing category.

[0113] In one optional embodiment of the present disclosure, the power ramp step size is configured uniformly under each PRACH timing category; or, the power ramp step size is configured independently under each PRACH timing category.

[0114] In an optional embodiment of the present disclosure, the power ramp value is incremented by 1 if at least one of the following conditions is met: no power ramp count stop notification is received; the selection of the synchronization signal block SSB has not changed compared to the last PRACH access preamble transmission; and the selection of the channel state information reference signal CSI-RS has not changed compared to the last PRACH access preamble transmission.

[0115] The SBFD-based PRACH retransmission apparatus disclosed herein can be applied in user terminals. The user terminal determines the PRACH timing and the PRACH transmission power based on the target received power, and then performs PRACH retransmission according to the PRACH timing and transmission power. The PRACH timing includes being located within a first type of symbol, a second type of symbol, or both. The first type of symbol contains both uplink and downlink subcarriers, while the second type of symbol contains only uplink subcarriers. The target received power is determined based on power parameters independently configured for each PRACH timing category, and each PRACH timing category includes at least one and at most two PRACH timings. By providing the aforementioned method, SBFD resources can be rationally allocated in PRACH retransmission, and data transmission scheduling can be performed based on SBFD symbols to avoid uplink interference with downlink transmission, thus standardizing the configuration of SBFD technology in PRACH retransmission.

[0116] Figure 4 is a schematic diagram of the structure of an electronic device 400 provided in an embodiment of this disclosure. As shown in Figure 4, the electronic device 400 may include a processor 401, a memory 402, and a program or instructions stored in the memory 402 and executable on the processor 401. When the program or instructions are executed by the processor 401, they implement the various processes of the above-described signaling interoperability embodiment and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0117] It should be noted that the electronic device 400 shown in Figure 4 is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments disclosed herein.

[0118] Figure 5 is a hardware schematic diagram of an electronic device 500 provided in an embodiment of this disclosure. As shown in Figure 5, the electronic device 500 includes a Central Processing Unit (CPU) 501, which can perform various appropriate actions and processes according to programs stored in ROM (Read Only Memory) 502 or programs loaded from storage portion 508 into RAM (Random Access Memory) 503. The RAM 503 also stores various programs and data required for system operation. The CPU 501, ROM 502, and RAM 503 are interconnected via a bus 504. An I / O (Input / Output) interface 505 is also connected to the bus 504.

[0119] The following components are connected to I / O interface 505: an input section 506 including a keyboard, mouse, etc.; an output section 507 including CRT (Cathode Ray Tube), LCD (Liquid Crystal Display), etc., and speakers, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN (Local Area Network), modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to I / O interface 505 as needed. Removable media 511, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 510 as needed so that computer programs read from them can be installed into storage section 508 as needed.

[0120] In particular, according to embodiments of this disclosure, the processes described below with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 509, and / or installed from removable medium 511. When the computer program is executed by the central processing unit (CPU 501), it performs various functions defined in the system of this application.

[0121] This disclosure also transmits a computer-readable medium storing a program or instructions that, when executed by a processor, implement the various processes of the above signaling interoperability embodiments and achieve the same technical effects. To avoid repetition, these will not be described again here.

[0122] The processor is the processor in the electronic device described in the above embodiments. Computer-readable media includes computer-readable media such as ROM, RAM, magnetic disks, or optical disks.

[0123] This disclosure also discloses a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above signaling interoperability embodiments and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0124] It should be understood that the chip mentioned in the embodiments of this disclosure may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0125] This disclosure provides a computer program product containing instructions that, when run on a computer, causes the computer to perform the signaling interoperability steps described above and achieves the same technical effect. To avoid repetition, further details are omitted here.

[0126] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this disclosure is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0127] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, electronic device, air conditioner, or network device, etc.) to execute the methods of the various embodiments of this disclosure.

[0128] The embodiments of this disclosure have been described above with reference to the accompanying drawings. However, this disclosure is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this disclosure without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this disclosure.

Claims

1. A PRACH retransmission method based on SBFD, the method being applied to a user terminal, the method comprising: Determine the timing of the Physical Random Access Channel (PRACH), wherein the PRACH timing includes being located within a first type of symbol, within a second type of symbol, or simultaneously within both the first and second type of symbols. The first type of symbol contains both subcarriers for uplink transmission and subcarriers for downlink transmission, while the second type of symbol contains only subcarriers for uplink transmission. The PRACH transmission power is determined based on the target receive power of the PRACH, which is determined according to the power parameters configured independently for each PRACH timing category, and each PRACH timing category includes at least one and at most two PRACH timings. PRACH retransmission is performed based on the PRACH timing and the PRACH transmission power.

2. The method according to claim 1, wherein, The determination of the timing of the Physical Random Access Channel (PRACH) includes: If the initial PRACH transmission, or the PRACH timing selected in the previous PRACH transmission, is within the first type of symbol, then the PRACH timing is determined to be within the first type of symbol. If the initial PRACH transmission, or the PRACH timing selected in the previous PRACH transmission, is within the second type of symbol, then the PRACH timing is determined to be within the second type of symbol. If the PRACH timing selected in the initial PRACH transmission or the previous PRACH transmission is simultaneously located within the first type symbol and the second type symbol, then the PRACH timing is determined to be simultaneously located within the first type symbol and the second type symbol.

3. The method according to claim 1, wherein, Each of the aforementioned PRACH timing classifications may include both the one located within the first type of symbol and the one located within the second type of symbol.

4. The method according to claim 1, wherein, The PRACH timing classification includes the first category located within the first type of symbol, the second category located within the second type of symbol, and the third category located simultaneously within both the first type of symbol and the second type of symbol; Alternatively, the PRACH timing classification includes the fourth category located within the first type of symbol, and the fifth category located within the second type of symbol, or simultaneously located within both the first and second type of symbols; Alternatively, the PRACH timing classification includes the sixth category located within the second type of symbol, and the seventh category located within the first type of symbol and simultaneously located within both the first type of symbol and the second type of symbol; Alternatively, the PRACH timing classification may include the eighth category within the first type of symbol and the ninth category within the second type of symbol.

5. The method according to claim 1, wherein, The target received power can also be determined based on the power ramp value and the power ramp step size.

6. The method according to claim 5, wherein, The power surge value is counted uniformly under each of the PRACH timing categories; Alternatively, the power surge value may be counted independently under each of the PRACH timing categories.

7. The method according to claim 5, wherein, The power ramp-up step size is uniformly configured under each of the PRACH timing categories; Alternatively, the power ramp step size may be configured independently under each of the PRACH timing categories.

8. The method according to claim 5, wherein, The power increment value is incremented by 1 if at least one of the following conditions is met: No notification of power ramp-up notification received; Compared to the previous PRACH access preamble transmission, the selection of the synchronization signal block (SSB) remains unchanged. Compared to the previous PRACH access preamble transmission, the selection of the Channel State Information Reference Signal (CSI-RS) remains unchanged.

9. A PRACH retransmission device based on SBFD, the device being applied to a user terminal, the device comprising: The timing determination module is used to determine the timing of the Physical Random Access Channel (PRACH). The PRACH timing includes being located within a first type of symbol, within a second type of symbol, or simultaneously within both the first and second type of symbols. The first type of symbol contains both subcarriers for uplink transmission and subcarriers for downlink transmission, while the second type of symbol contains only subcarriers for uplink transmission. A power determination module is used to determine the PRACH transmission power based on the target received power of the PRACH, wherein the target received power is determined according to power parameters configured independently for each PRACH timing category, and each PRACH timing category includes at least one and at most two PRACH timings. The retransmission execution module is used to perform PRACH retransmission according to the PRACH timing and the PRACH transmission power.

10. An electronic device comprising a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the SBFD-based PRACH retransmission method as described in any one of claims 1 to 8.

11. A computer-readable medium storing a program or instructions that, when executed by a processor, implement the SBFD-based PRACH retransmission method as described in any one of claims 1 to 8.

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