Reference signals for channel and interference measurements

Abstract

A method of transmitting and receiving a reference signal (RS) pattern is disclosed, where the RS pattern comprises occupying two or more consecutive symbols, and where the RS pattern comprises a first cyclic prefix (CP), at least one RS signal, and a second CP.

Description

Technical Field

[0001] The present disclosure generally relates to channel and interference measurements, and more specifically, to a mechanism for transmitting a reference signal (RS) pattern as part of channel and interference measurements. Background Art

[0002] In LTE and NR systems, OFDM (Orthogonal Frequency Division Multiplexing) is used. In various examples, a CP (Cyclic Prefix) is used at the start of each OFDM symbol to combat inter-symbol interference. Channel and CLI (Cross-Link Interference) measurements are crucial for eliminating or mitigating interference between an aggressor wireless device (e.g., a base station or a user equipment (UE)) and a victim (e.g., another base station or another user equipment (UE)). Channel and CLI measurements between the aggressor and the victim rely on timing alignment between the aggressor and the victim. If the timing difference between the aggressor and the victim exceeds the CP length, it is difficult or even impossible to obtain accurate measurement results.

[0003] As Figure 3 shown, to allow the base station sufficient time to perform the UL to DL handover, UL symbols are typically shifted (e.g., 13 us earlier compared to DL symbols on the base station side). In addition to the shifted 13 us, there are some other factors that will affect the timing difference, such as the timing alignment accuracy between the DL time slots of the aggressor and the victim, and the transmission delay between the aggressor and the victim. However, compared to the 13 us shift, these other factors are much smaller and easier to accommodate. In this case, the timing difference between the aggressor and the victim will significantly exceed the CP length on the victim side, making it difficult or even impossible to obtain accurate measurement results. Similar problems exist for UE-UE CLI measurements. It is necessary to solve the measurement accuracy in the case of a large timing difference between the aggressor and the victim. Summary of the Invention

[0004] The present disclosure generally relates to channel and interference measurements, and more specifically, to a new mechanism for transmitting a reference signal (RS) pattern as part of channel and interference measurements. Various exemplary embodiments are particularly directed to providing accurate channel and CLI measurement results between an aggressor wireless device and a victim wireless device by transmitting a new RS pattern.

[0005] In some exemplary embodiments, a method performed by a wireless device (e.g., an attacking wireless device and / or an attacked wireless device) is disclosed. The method may include: transmitting or receiving a reference signal (RS) pattern, wherein the RS pattern occupies two or more consecutive symbols, and wherein the RS pattern includes a first cyclic prefix (CP), at least one RS signal, and a second CP. In some exemplary embodiments, which may be combined with any other exemplary embodiments disclosed herein, the at least one RS signal is located between the first CP and the second CP in the RS pattern. Further, the length of the RS signal in the time domain is T RS , the length of the first CP in the time domain is T CP1 , the length of the second CP in the time domain is T CP2 , and wherein, T RS , T CP1 , and T CP2 sum to the length of two or more consecutive symbols in the time domain.

[0006] In some exemplary embodiments, which may be combined with any other exemplary embodiments disclosed herein, the method further includes: transmitting or receiving a first CP signal during the first CP, wherein the first CP signal is equivalent to the last T CP1 portion of the at least one RS signal, and transmitting or receiving a second CP signal during the second CP, wherein the second CP signal is equivalent to the first T CP2 portion of the at least one RS signal. In some examples, T RS is equal to T CP2 , and / or the second CP signal is equivalent to one RS signal. In some examples where the RS pattern occupies two consecutive symbols, T CP1 is equal to the sum of the CP lengths of the signals transmitted in the first symbol of the two consecutive symbols and the CP lengths of the signals transmitted in the second symbol of the two consecutive symbols, T RS is equal to the length of the signal transmitted in the first symbol, and is equal to the length of the signal transmitted in the second symbol.

[0007] In some exemplary embodiments, which may be combined with any other exemplary embodiments disclosed herein, the method further includes transmitting or receiving the at least one RS signal M times as part of the RS pattern, where M is an integer and M is greater than 1. This may also include transmitting or receiving a first CP signal during the first CP, wherein the first CP signal is equivalent to the last T CP1 portion of the at least one RS signal, and transmitting or receiving a second CP signal during the second CP, wherein the second CP signal is equivalent to the first T CP2 portion of the at least one RS signal. In various examples, TCP1 may be equal to the length of the CP of the signal transmitted in the first symbol of two or more consecutive symbols, T CP2 may be equal to the length of the CP of the signal transmitted in the second symbol of two or more consecutive symbols, and M*T RS may be equal to the sum of the length of the signal transmitted in the first symbol and the length of the signal transmitted in the second symbol. In the example where M = 2, T RS is equal to the length of the signal transmitted in the first symbol, and is equal to the length of the signal transmitted in the second symbol.

[0008] In some exemplary embodiments in which it may be combined with any other exemplary embodiments disclosed herein, the RS pattern occupies N consecutive symbols, where N is an integer greater than 2. In various examples, the at least one RS signal is located between the first CP and the second CP in the RS pattern. Further, the length of the RS signal in the time domain is T RS and the length of the first CP in the time domain is T CP1 and the length of the second CP in the time domain is T CP2 and where T RS 、T CP1 and T CP2 sum is equal to the length of N consecutive symbols in the time domain.

[0009] In some exemplary embodiments in which it may be combined with any other exemplary embodiments disclosed herein, the method further includes: transmitting or receiving a first CP signal during the first CP, where the first CP signal is equivalent to the last T CP1 portion of the at least one RS signal, and transmitting or receiving a second CP signal during the second CP, where the second CP signal is equivalent to the first T CP2 portion of the at least one RS signal. In some examples, T RS is equal to T CP2 and / or the second CP signal is equivalent to one RS signal.

[0010] In some exemplary embodiments in which it may be combined with any other exemplary embodiments disclosed herein, the method further includes: transmitting or receiving the at least one RS signal M times as part of an RS pattern, where M is an integer and M is greater than 1. This may also include transmitting or receiving a first CP signal during the first CP, where the first CP signal is equivalent to the last T CP1 portion of the at least one RS signal, and transmitting or receiving a second CP signal during the second CP, where the second CP signal is equivalent to the first T CP2 portion of the at least one RS signal.

[0011] In some exemplary embodiments, which may be combined with any other exemplary embodiments disclosed herein, the method further includes: transmitting or receiving an RS pattern in a downlink (DL) symbol that at least partially overlaps with a gap symbol of a wireless device or another wireless device. Additionally, the method may include transmitting or receiving only a first portion of a second CP. The method may further include transmitting or receiving an indication of the position of the gap symbol, determining a symbol that at least partially overlaps with the gap symbol, and transmitting or receiving an RS pattern in the symbol that at least partially overlaps with the gap symbol.

[0012] In some exemplary embodiments, which may be combined with any other exemplary embodiments disclosed herein, the method further includes: mapping and / or transmitting or receiving an RS signal mapped to a frequency resource every P resource elements (REs), where P is an integer greater than 0. The method may include not transmitting or receiving a signal in the REs between every P REs. The method may further include configuring or receiving a configuration of an offset S to indicate different REs for different reference signals. The method may further include indicating or receiving an indication of a subcarrier spacing for receiving an RS pattern. The method may further include determining a value of P based on the subcarrier spacing, where the numerology of the subcarrier spacing of the wireless device and another wireless device are u A and u V respectively, where u V is not less than u A , and where, Alternatively, the method may further include determining a value of P based on the subcarrier spacing of the wireless device and a reference subcarrier spacing, where the numerology of the subcarrier spacing of the wireless device and the reference subcarrier spacing are u A and u R respectively, where u V is not less than u R , and where,

[0013] In some other embodiments, a device for wireless communication, such as a network device, is disclosed. The network device mainly includes one or more processors and one or more memories, where the one or more processors are configured to read computer code from the one or more memories to implement any of the above methods. The device for wireless communication may be a wireless access node or a wireless terminal device.

[0014] In still some other embodiments, a computer program product is disclosed. The computer program product may include a non-transitory computer-readable medium having computer code stored thereon, which, when executed by one or more processors, causes the one or more processors to implement any of the above methods.

[0015] The above embodiments and other aspects and alternatives of their implementations are explained in more detail in the following drawings, detailed description, and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A radio access network with exemplary wireless communication according to various embodiments is shown.

[0017] Figure 2 Shows Figure 1 various example processing components of a wireless terminal device and a radio access network node.

[0018] Figure 3 An example signal timing diagram according to various embodiments is shown.

[0019] Figure 4 Another example signal timing diagram according to various embodiments is shown.

[0020] Figure 5 An example RS pattern according to various embodiments is shown.

[0021] Figure 6 Additional aspects of an example RS pattern according to various embodiments are shown.

[0022] Figure 7 Another example RS pattern according to various embodiments is shown.

[0023] Figure 8 Another example RS pattern according to various embodiments is shown.

[0024] Figure 9 An example signal timing diagram according to various embodiments is shown.

[0025] Figure 10 An example signal timing diagram according to various embodiments is shown.

[0026] Figure 11 An example of frequency resource mapping according to various embodiments is shown. DETAILED DESCRIPTION

[0027] The techniques and examples of the embodiments and / or examples described in this disclosure can be used to facilitate the transmission of specific RS patterns for channel and interference measurements in a radio access network. The term "exemplary" is used to mean "an example of...", and unless otherwise stated, does not mean an ideal or preferred example, embodiment, or example. The use of section headings in this disclosure is for ease of understanding the disclosed embodiments and is not intended to limit the techniques disclosed in the sections to the respective sections. The disclosed embodiments can also be embodied in various different forms, and thus, the scope of this disclosure or the claimed subject matter is intended to be construed as not limited to any of the embodiments set forth below. The various embodiments can be embodied as a method, device, component, system, or non-transitory computer-readable medium. Thus, the embodiments of this disclosure can, for example, take the form of hardware, software, firmware, or any combination thereof.

[0028] This disclosure presents a new mechanism for transmitting a specific RS pattern as part of a channel and interference measurement process. Various example embodiments provide specific configurations and details of the RS pattern. By using the disclosed embodiments, the accuracy of channel and CLI measurement results between an attacking wireless device and an attacked wireless device can be improved.

[0029] Overview of Wireless Network

[0030] A wireless communication network can include a radio access network for providing network access to wireless terminal devices, and a core network for routing data between access networks or between a wireless network and other types of data networks. In a radio access network, radio resources are provided for allocation and are used for transmitting data and control information. Figure 1An exemplary radio access network 100 is shown, which includes radio access network nodes (WANNs) or radio base stations 102 (referred to herein as radio base stations, base stations, radio access nodes, radio access network nodes, or WANNs) and radio terminal devices or user equipment (UEs) 104 (referred to herein as user equipment, UEs, terminal devices, or radio terminal devices) that communicate with each other via over-the-air (OTA) radio communication resources 106. The radio access network 100 can be implemented as, for example, a 2G, 3G, 4G / LTE, or 5G cellular radio access network. Accordingly, the base station 102 can be implemented as a 2G base station, a 3G Node B, an LTE eNB, or a 5G New Radio (NR) gNB. The user equipment 104 can be implemented as a mobile or fixed communication device equipped with a mobile identification module for accessing the base station 102. The user equipment 104 can include, but is not limited to, mobile phones, laptop computers, tablet computers, personal digital assistants, wearable devices, distributed remote sensor devices, and desktop computers. Alternatively, the radio access network 100 can be implemented as other types of radio access networks such as Wi-Fi, Bluetooth, ZigBee, and WiMax networks.

[0031] In various embodiments of the present disclosure, as Figure 1 shown, the base station 102 can be an "attacking" radio device 108 (also simply referred to as the attacker), and the UE 104 can be a "targeted" radio device 110 (also simply referred to as the target). However, the present disclosure is not limited to this arrangement. For example, both the attacking radio device 108 and the targeted radio device 110 can be base stations 102, both the attacking radio device 108 and the targeted radio device 110 can be UEs 104, the attacking radio device 108 can be a base station 102, and the targeted radio device 110 can be a UE 104, or the attacking radio device 108 can be a UE 104, and the targeted radio device 110 can be a base station 102. Throughout the present disclosure and the claims, the "attacking radio device" 108 and the "targeted radio device" 110 are referenced, and it should be understood that, according to the above example arrangements, each of these terms can represent a base station 102 or a UE 104.

[0032] Figure 2 Further shown is Figure 1Example processing components of the WANN 102 and the UE 104. For example, the UE 104 may include a transceiver circuit 206 coupled to one or more antennas 208 to implement wireless communication with the WANN 102 (or other UEs). The transceiver circuit 206 may also be coupled to a processor 210, which may also be coupled to a memory 212 or other storage device. The memory 212 may be transient or non-transient and may store computer instructions or code therein that, when read and executed by the processor 210, cause the processor 210 to implement the various functions, methods, and processes described herein. Similarly, the WANN 102 may include a transceiver circuit 214 coupled to one or more antennas 216, which may include various forms of antenna towers 218, to implement wireless communication with the UE 104. The transceiver circuit 214 may be coupled to one or more processors 220, which may also be coupled to a memory 222 or other storage device. The memory 222 may be transient or non-transient and may store instructions or code therein that, when read and executed by one or more processors 220, cause the one or more processors 220 to implement the various functions, methods, and processes of the WANN 102 described herein.

[0033] Reference Signal (RS)

[0034] In various embodiments, a reference signal (RS) is a signal used in a downlink (DL) or uplink (UL) channel to measure the characteristics of a wireless channel so that a device can adjust the characteristics to optimize the channel (e.g., using the correct modulation, coding rate, beamforming, etc.). For example, the UE 102 uses the RS to measure the quality of the DL channel and sends a measurement report in the UL channel, such as via a channel quality index (CQI) report.

[0035] Returning to Figure 1 , the wireless communication resources for the air interface 106 may include a combination of frequency, time, and / or space communication resources that are organized into various resource units or elements in frequency, time, and / or space. The wireless communication resources 106 in the frequency domain may include a portion of a licensed wireless frequency band, a portion of an unlicensed authorized wireless frequency band, or a portion that is a hybrid of both licensed and unlicensed wireless frequency bands. The wireless communication resources 106 available for carrying wireless communication signals between the base station 102 and the user equipment 104 may also be divided into a physical downlink (DL) channel 116 for transmitting wireless signals from the base station 102 to the user equipment 104 and a physical uplink (UL) channel 118 for transmitting wireless signals from the user equipment 104 to the base station 102.

[0036] As part of the communication from the attacking wireless device 108 to the attacked wireless device 110 (e.g., DL channel 116), the attacking wireless device 108 may transmit a reference signal (RS) 112. Similarly, in response, as part of the communication from the attacked wireless device 110 to the attacking wireless device 108 (e.g., UL channel 118), the attacked wireless device 110 may transmit a measurement report 114.

[0037] New Reference Signal Design Description

[0038] Referring to by way of example Figure 4 , according to various embodiments, the attacking wireless device 108 may transmit an RS, and the attacked wireless device 110 is required to measure the RS. However, due to the timing difference between the attacking wireless device 108 and the attacked wireless device 110, a portion of the RS is outside the FFT (Fast Fourier Transform) window of each OFDM symbol. Specifically, in this example, the end portion of the second RS signal is in the subsequent UL symbol and will not be measured within the correct FFT window. Thus, the data in the second RS signal will not be included in the measurement results of the correct FFT window. If the attacked wireless device 110 applies the data obtained during the FFT window to measure the channel or interference, it cannot obtain accurate measurement results because it loses at least a portion of the RS signal.

[0039] Now referring to Figure 5 , an example of a new RS pattern design is disclosed. According to various embodiments, for a subcarrier spacing, one RS pattern occupies two consecutive OFDM symbols corresponding to that subcarrier spacing. (Other embodiments discussed below provide RS patterns that occupy more than two consecutive OFDM symbols.) In this example, there are two CPs for the RS pattern, i.e., the first CP is before the RS signal, and the second CP is after the RS signal. The RS signal is between the two CPs.

[0040] Thus, a method according to various embodiments may include a wireless device (e.g., the attacking wireless device 108) transmitting an RS pattern, and another wireless device (e.g., the attacked wireless device 110) receiving the RS pattern, where the RS pattern occupies two or more consecutive symbols, and where the RS pattern includes a first CP, at least one RS signal, and a second CP. The at least one RS signal may be located between the first CP and the second CP in the RS pattern.

[0041] In various methods, assume the length of the RS in the time domain is T RS , and the lengths of the first CP and the second CP in the time domain are T CP1 and T CP2, then correspondingly, T RS , T CP1 and T CP2 have a sum that is the same as the length of these two consecutive OFDM symbols in the time domain. This new RS pattern design can also be applied to the signals transmitted in one symbol. In this case, the sum of T RS , T CP1 and T CP2 is the same as the length of the OFDM symbol in the time domain.

[0042] Referring to Figure 6 , in some examples, the signal in the first CP can be the same as the last T CP1 signal in the RS signal. Similarly, the signal in the second CP can be the same as the first T CP2 signal in the RS signal. In other words, the last T CP1 signal in the RS signal is copied to the first CP, and the first T CP2 signal in the RS signal is copied to the second CP.

[0043] Thus, the method can include: a wireless device (e.g., the attacking wireless device 108) transmits a first CP signal during the first CP, and another wireless device (e.g., the attacked wireless device 110) receives the first CP signal during the first CP, where the first CP signal is equivalent to the last T CP1 portion of the at least one RS signal, and the attacking wireless device 108 transmits a second CP signal during the second CP, and the attacked wireless device 110 receives the second CP signal during the second CP, where the second CP signal is equivalent to the first T CP2 portion of the at least one RS signal.

[0044] According to various embodiments, T CP2 can be equal to T RS . In this case, the signal in the second CP is the same as the RS signal itself.

[0045] Using this new RS pattern design, regardless of when the attacked wireless device 110 starts receiving the RS signal, or regardless of when the attacked wireless device 110 starts its FFT window, the attacked wireless device 110 can obtain the entire RS signal and thus obtain accurate measurement results. Because regardless of when the attacked wireless device 110 starts its FFT window, the attacked wireless device 110 can obtain the same signal whether it is rotated or not.

[0046] Referring to as an example Figure 7, the lengths of the first OFDM symbol and the second OFDM symbol are 5. The length of the RS signal is 4. The length of the first CP is 2, and the length of the second CP is 4. Assuming the signal transmitted as the RS signal is "ABCD", in this example, the first CP is "CD", and the second CP is "ABCD". If the attacked wireless device 110 starts its FFT window at, for example, the fourth sample, and the window size is 4, then the attacked wireless device 110 will receive "BCDA" during the FFT window. After performing the FFT operation, the attacked wireless device 110 obtains the same information as "ABCD", even though the information is received in a different order.

[0047] To minimize the interference between the RS signal and other signals transmitted in the first OFDM symbol and the second OFDM symbol, some special settings can be applied. In one embodiment, the length (T CP1 ) of the first CP of the RS is equal to the sum of the lengths of the CPs of the signals transmitted in the first OFDM symbol and the second OFDM symbol (e.g., when the RS pattern is the same as the lengths of two consecutive OFDM signals). The length (T RS ) of the RS signal is equal to the length of the signal transmitted in the first OFDM symbol and is equal to the length of the signal transmitted in the second OFDM symbol.

[0048] In an exemplary embodiment, the length of the RS signal is given by T RS = 2048k·2 -u , where k is equal to 64, and u is the OFDM digital scheme according to 3GPP TS38.211, examples of which are provided below. By setting these configurations, due to the characteristics of OFDM transmission, the interference between the RS occupying two consecutive OFDM symbols and the signals transmitted in the first OFDM symbol and the second OFDM symbol can be minimized. In other words, compared with the signals transmitted in the first OFDM symbol and the second OFDM symbol, this is equivalent to transmitting the RS with a smaller subcarrier spacing.

[0049] u OFDM Subcarrier Spacing (kHz) 0 15 1 30 2 60 3 120 4 240

[0050] Referring to Figure 8 as an example, signal #1 and signal #2 are transmitted in the first OFDM symbol and the second OFDM symbol, respectively. Signal #1 and signal #2 each have a CP before the start of signal #1 and signal #2, respectively. The CP lengths of signal #1 and signal #2 are T CPA and T CPB , respectively. Then, in various embodiments, T CP1 = T CPA + T CPB . In addition, TRS is the same length as the lengths of Signal #1 and Signal #2 transmitted in the first OFDM symbol and the second OFDM symbol, respectively.

[0051] Referring to Figure 9 , a second alternative is shown. According to various embodiments, the RS signal may be repeated M times, where M is an integer and M is greater than 1. Thus, the method may include: a wireless device (e.g., the attacking wireless device 108) transmitting the at least one RS signal M times as part of an RS pattern, and another wireless device (e.g., the attacked wireless device 110) receiving the at least one RS signal M times, where M is an integer and M is greater than 1.

[0052] In some embodiments, in a manner similar to that discussed above with reference to Figure 6 and Figure 7 , the signal in the first CP may be the same as the last T CP1 signal in the RS signal, and the signal in the second CP may be the same as the first T CP2 signal in the RS signal. In other words, the last T CP1 signal in the RS signal may be copied to the first CP, and the first T CP2 signal in the RS signal may be copied to the second CP. Figure 9 This embodiment is illustrated by an example where M equals 2 (e.g., the RS signal is repeated twice).

[0053] Thus, the method may include: the wireless device (e.g., the attacking wireless device 108) transmitting a first CP signal during the first CP, and another wireless device (e.g., the attacked wireless device 110) receiving the first CP signal during the first CP, where the first CP signal is equivalent to the last T CP1 portion of the at least one RS signal, and the wireless device transmitting a second CP signal during the second CP, and the other wireless device receiving the second CP signal during the second CP, where the second CP signal is equivalent to the first T CP2 portion of the at least one RS signal.

[0054] To minimize the interference between the RS and other signals transmitted in the first OFDM symbol and the second OFDM symbol, some special settings may be applied. In one embodiment, the length of the first CP of the RS (T CP1 ) is equal to the length of the CP of the signal transmitted in the first OFDM symbol. The length of the second CP of the RS (T CP2 ) is equal to the length of the CP of the signal transmitted in the second OFDM symbol. The total length of the RS signal (M*T RS) is equal to the sum of the lengths of the signals transmitted in the first OFDM symbol and the second OFDM symbol. In the case where M is equal to 2, this means that the RS signal is repeated twice, and the length of each repetition of the RS signal (T RS ) is equal to the length of the signal transmitted in the first OFDM symbol and is equal to the length of the signal transmitted in the second OFDM symbol.

[0055] In one embodiment, for example, when M = 2, the total length of the RS signal is given by M * T RS = 4096k·2 -u where k is equal to 64, and u is the OFDM numerology according to 3GPP TS38.211. By setting these configurations, the interference between the RS occupying two consecutive OFDM symbols and the signals transmitted in the first OFDM symbol and the second OFDM symbol can be minimized due to the characteristics of OFDM transmission. In other words, compared with the signals transmitted in the first OFDM symbol and the second OFDM symbol, this is equivalent to transmitting the RS with a smaller subcarrier spacing.

[0056] With this new RS pattern design, no matter when the attacked wireless device 110 starts receiving this RS pattern or no matter when the attacked wireless device 110 starts its FFT window, the attacked wireless device 110 can obtain the entire RS signal and thus obtain accurate measurement results.

[0057] In a second general method, the above embodiments can also be applied to RS patterns that occupy more than two consecutive OFDM symbols. In this second general method, for a subcarrier spacing, an RS pattern occupies N consecutive OFDM symbols corresponding to that subcarrier spacing, where N is an integer and N is greater than 2. As described above, there can be two CPs for this RS pattern, where the first CP is before the RS signal and the second CP is after the RS signal, such that at least one RS signal is located between the first CP and the second CP in the RS pattern.

[0058] As described above, in some examples, assume that the length of the RS signal in the time domain is T RS , and the lengths of the first CP and the second CP in the time domain are T CP1 and T CP2 respectively. Then the sum of T RS , T CP1 and T CP2 is the same as the length of N consecutive OFDM symbols in the time domain. This new RS design can also be applied to the signals transmitted in one symbol. In this case, T RS , T CP1 and T CP2The sum is the same as the length of the OFDM symbol in the time domain.

[0059] Similarly, as described above, in some examples, the signal in the first CP can be the same as the last T CP1 signal in the RS signal. Similarly, the signal in the second CP can be the same as the first T CP2 signal in the RS signal. In other words, the last T CP1 signal in the RS signal is copied to the first CP, and the first T CP2 signal in the RS signal is copied to the second CP.

[0060] Thus, the method can include: a wireless device (e.g., the attacking wireless device 108) transmits a first CP signal during the first CP, and another wireless device (e.g., the attacked wireless device 110) receives the first CP signal during the first CP, where the first CP signal is equivalent to the last T CP1 portion of the at least one RS signal, and the wireless device transmits a second CP signal during the second CP, and the other wireless device receives the second CP signal during the second CP, where the second CP signal is equivalent to the first T CP2 portion of the at least one RS signal.

[0061] In addition, similarly, according to various embodiments, T CP2 can be equal to T RS . In this case, the signal in the second CP is the same as the RS signal itself.

[0062] Similarly, as described above, in a second alternative, the RS signal can be repeated M times, where M is an integer and M is greater than 1. Thus, the method can include: a wireless device (e.g., the attacking wireless device 108) transmits the at least one RS signal M times as part of an RS pattern, and another wireless device (e.g., the attacked wireless device 110) receives the at least one RS signal M times, where M is an integer and M is greater than 1.

[0063] In addition, in some embodiments, in a manner similar to that discussed above with reference to Figure 6 、 7 and 9, the signal in the first CP can be the same as the last T CP1 signal in the RS signal, and the signal in the second CP can be the same as the first T CP2 signal in the RS signal. In other words, the last T CP1 signal in the RS signal can be copied to the first CP, and the first T CP2 signal in the RS signal can be copied to the second CP.

[0064] Thus, the method may further include: the wireless device (e.g., the attacking wireless device 108) transmits a first CP signal during a first CP, and another wireless device (e.g., the attacked wireless device 110) receives the first CP signal during the first CP, wherein the first CP signal is equivalent to the last T of the at least one RS signal CP1 portion, and the wireless device transmits a second CP signal during a second CP, and the other wireless device receives the second CP signal during the second CP, wherein the second CP signal is equivalent to the first T of the at least one RS signal CP2 portion.

[0065] In another embodiment, to allow sufficient time for a wireless device (e.g., a UE or a base station) to perform a DL-UL handover and to allow sufficient time for timing advance, typically 1 or 2 symbols are reserved as gap symbols. During the gap symbols, no DL transmissions and UL transmissions are made. However, the base station typically performs the DL-UL handover relatively quickly, typically in less than 13 us. Thus, as long as sufficient time is reserved for the DL-UL handover, the base station is able to transmit or receive during the gap symbols.

[0066] Since UL transmissions and DL transmissions of the UE are not scheduled during the gap symbols, to avoid or minimize the impact on UE scheduling, an RS pattern occupying, for example, two or more (e.g., N) consecutive OFDM symbols with the new design disclosed herein may be transmitted in DL symbols overlapping with the gap symbols of the attacked wireless device 110, or the RS pattern may be transmitted overlapping with the gap symbols of the attacking wireless device 108. Alternatively, the RS pattern may be transmitted partially overlapping with any one of these gap symbols. For example, the first OFDM symbol may be in a DL symbol and the second OFDM symbol may be in a gap symbol.

[0067] Thus, the method may include: a wireless device (e.g., the attacking wireless device 108) transmits an RS pattern in a DL symbol at least partially overlapping with the gap symbols of the wireless device or another wireless device, and another wireless device (e.g., the attacked wireless device 110) receives the RS pattern in a DL symbol at least partially overlapping with the gap symbols of the wireless device or another wireless device.

[0068] As Figure 10As shown, RS patterns are transmitted in DL symbols that overlap with the gap symbols of the attacked party's wireless device 110. Similarly, RS patterns can be transmitted in the gap symbols of the attacking party's wireless device 108. To further avoid the CLI to the attacked party's wireless device 110, the attacking party's wireless device 108 does not need to transmit the entire second CP of the RS pattern. In other words, the attacking party's wireless device 108 can transmit only the first T of the second CP. 2trans signal, where 0 ≤ T 2trans ≤ T CP2 . In this way, the method can include: a wireless device (e.g., the attacking party's wireless device 108) transmits only the first part of the second CP, while another wireless device (e.g., the attacked party's wireless device 110) receives only the first part of the second CP. Similarly, in an embodiment using M repeated RS signals, the attacking party's wireless device 108 can also transmit only a part of the Mth (last) RS signal (e.g., it will end the transmission before or at the same time as the start of the CP of the UL of the attacked party's wireless device 110).

[0069] In some embodiments, the gap symbol is a flexible symbol configured by the base station or a symbol indicated by the base station. In one embodiment, the attacked party's wireless device 110 indicates the position of the gap symbol to the attacking party's wireless device 108. The attacking party's wireless device 108 determines the symbols that overlap with the gap symbol of the attacked party's wireless device 110 and transmits the RS pattern in these symbols.

[0070] In this way, the method can include: a wireless device (e.g., the attacking party's wireless device 108) receives an indication of the position of the gap symbol, and another wireless device (e.g., the attacked party's wireless device 110) transmits an indication of the position of the gap symbol. The wireless device (e.g., the attacking party's wireless device 108) can then perform the determination of the symbols that overlap at least partially with the gap symbol. And the method can include: a wireless device (e.g., the attacking party's wireless device 108) transmits the RS pattern in the symbols that overlap at least partially with the gap symbol, and another wireless device (e.g., the attacked party's wireless device 110) receives the RS pattern in the symbols that overlap at least partially with the gap symbol.

[0071] In another embodiment, to implement the RS repeated M times in the time domain, a comb design of the RS signal in the frequency domain can be applied. For example, if the signal in the frequency domain is [1+0i, 2+0i, 3+0i, 4+0i], where i is the imaginary unit, the signal after performing FFT and converted to the time domain is [10+0i, -2+2i, -2+0i, -2-2i]. If zeros are inserted into the signal in the frequency domain, e.g., [1+0i, 0, 2+0i, 0, 3+0i, 0, 4+0i, 0], the signal converted to the time domain is [10+0i, -2+2i, -2+0i, -2-2i, 10+0i, -2+2i, -2+0i, -2-2i]. In contrast, the signal in the time domain is repeated twice.

[0072] According to this embodiment, every P resource elements (REs) can map the RS signal to frequency resources, where P is an integer and P>0. The offset S can be configured to indicate different REs for different reference signals. In some embodiments, no signal is transmitted in the REs between every P REs of the RS. If the index of the RE starts numbering from 0, the RS is mapped to the RE with index Pn+S, where n is a non-negative integer.

[0073] Thus, the method can include: every P resource elements (REs), a wireless device (e.g., the attacking wireless device 108) transmits or maps the RS signal mapped to the frequency resources, and every P resource elements (REs), another wireless device (e.g., the attacked wireless device 110) receives the RS signal mapped to the frequency resources, where P is an integer greater than 0. The method can further include: the wireless device (e.g., the attacking wireless device 108) does not transmit signals in the REs between every P REs, and another wireless device (e.g., the attacked wireless device 110) does not receive signals in the REs between every P REs.

[0074] For example, referring to Figure 11 , 24 REs are reserved for the RS signal in the frequency domain. If the REs are indexed from 0 to 23 from the lowest frequency to the highest frequency, and P equals 2 and S equals 1, the RS signal can be mapped to the REs with indices 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, as shown in Figure 11 .

[0075] In various methods, P can be determined by the subcarrier spacing of the attacking wireless device 108 and the attacked wireless device 110 (e.g., determined by the attacking wireless device 108). If the numerical schemes of the subcarrier spacings of the attacking wireless device 108 and the attacked wireless device 110 are u A and u V , then where u V is not less than u A .

[0076] Alternatively, in other methods, P can be determined by the subcarrier spacing of the attacking wireless device 108 and the reference subcarrier spacing (e.g., determined by the attacking wireless device 108). If the digital schemes of the subcarrier spacing of the attacking wireless device 108 and the reference subcarrier spacing are u A and u R , respectively, then where u V is not less than u R . The reference subcarrier spacing can be configured by the base station or indicated by the attacked wireless device 110.

[0077] In some methods, S can be configured by the attacking wireless device 108. Thus, the method can include a wireless device (e.g., the attacking wireless device 108) configuring and / or indicating the offset S, and another wireless device (e.g., the attacked wireless device 110) receiving the offset S to indicate different REs for different reference signals to receive the RS pattern.

[0078] The attacking wireless device 108 can configure or indicate the corresponding subcarrier spacing to the attacked wireless device 110 to receive the RS pattern. Thus, the method can include a wireless device (e.g., the attacking wireless device 108) configuring and / or indicating the subcarrier spacing of different reference signals, and another wireless device (e.g., the attacked wireless device 110) receiving the subcarrier spacing to receive the RS pattern.

[0079] For example, if the subcarrier spacings of the attacking wireless device 108 and the attacked wireless device 110 are 15 KHz respectively, and the attacking wireless device 108 configures S to be 2, the attacking wireless device 108 instructs the attacked wireless device 110 to receive the RS pattern with a subcarrier spacing of 30 KHz. Since the RS will be repeated twice, and the attacked wireless device 110 only needs to measure it once.

[0080] In another embodiment, as Figure 4 shown, the main problem to be solved is the timing misalignment between the attacking wireless device 108 and the attacked wireless device 110. A direct solution is to adjust the transmission start time of the attacking wireless device 108 within the symbol. Transmit the RS by advancing or delaying T adjust from the start of the symbol, so that the transmitted RS is aligned with the UL time slot duration of the attacked wireless device 110. The time unit of T adjust is T c = 1 / (Δf max·N f ), where Δf max = 480·10 3 Hz, and N f = 4096. T adjust is an integer. T adjust can be indicated by the victim wireless device 110. Typically, to accommodate the timing misalignment between the attacker wireless device 108 and the victim wireless device 110, the absolute value of T adjust shall not be less than 25600.

[0081] Alternatively, the victim wireless device 110 can adjust its reception timing to be advanced or delayed by T adjust from the start of the symbol, such that the victim wireless device 110 can receive the RS within the FFT window. The time unit of T adjust is T c = 1 / (Δf max ·N f ), where Δf max = 480·10 3 Hz, and N f = 4096. T adjust is an integer. T adjust can be indicated by the attacker wireless device 108.

[0082] Although the above description only discusses the new reference signal pattern mechanism for the reference signal (RS), the new pattern is not limited to this in its application and can also be used for data channels (such as DL data channels and UL data channels).

[0083] Although the above description only discusses the new reference signal pattern mechanism for OFDM symbols, the new pattern is not limited to this in its application and can also be used for other symbols (such as, CDM (Code Division Multiplexing) symbols).

[0084] The above description and the drawings provide specific example embodiments and implementations. However, the described subject matter can be embodied in various different forms, and thus, the subject matter covered or claimed is intended to be construed as not limited to any of the example embodiments described herein. It is intended to provide a reasonably broad scope for the subject matter claimed or covered. Among other things, for example, the subject matter can be embodied as a method, device, component, system, or non-transitory computer-readable medium for storing computer code. Thus, the embodiments can take, for example, the form of hardware, software, firmware, storage medium, or any combination thereof. For example, the above method embodiments can be implemented by a component, device, or system including a memory and a processor by executing computer code stored in the memory.

[0085] Throughout the specification and claims, terms may have meanings with nuances suggested or implied by the context, rather than only the meaning explicitly stated. Similarly, the phrase "in one embodiment / implementation / example / method" as used herein does not necessarily refer to the same embodiment, and the phrase "in another embodiment / implementation / example / method" as used herein does not necessarily refer to a different embodiment. For example, the subject matter intended to be claimed includes whole or partial combinations of example embodiments.

[0086] Generally speaking, terms can be understood at least in part from their usage in the context. For example, terms such as "and", "or", "and / or" as used herein can have multiple meanings, which can depend at least in part on the context in which these terms are used. Typically, "or", if used to relate a list (such as A, B, or C), is intended to mean A, B, and C as used herein in the inclusive sense, and A, B, or C as used herein in the exclusive sense. In addition, the term "one or more" as used herein can, at least in part depending on the context, be used to describe any feature, structure, or property in the singular sense, or can be used to describe a combination of features, structures, or properties in the plural sense. Similarly, terms such as "a", "an", or "the" can be understood to convey either singular usage or plural usage, at least in part depending on the context. In addition, the term "based on" can be understood to not necessarily convey a set of exclusive factors, but can allow for the presence of additional factors that are not necessarily explicitly described, again, at least in part depending on the context.

[0087] References in this specification to features, advantages, or similar language do not mean that all features and advantages achievable with this solution should be included in any single embodiment. On the contrary, language referring to features and advantages is understood to mean that a particular feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of this solution. Thus, throughout the specification, discussions of features and advantages and similar language can, but do not necessarily, refer to the same embodiment.

[0088] In addition, the described features, advantages, and characteristics of this solution can be combined in any suitable way in one or more embodiments. Based on the description herein, those of ordinary skill in the relevant art should recognize that this solution can be practiced without one or more specific features or advantages of a particular embodiment. In other cases, additional features and advantages may be recognized in some embodiments that may not exist in all embodiments of this solution.

Claims

1. A method performed by a wireless device, comprising: Transmitting a reference signal (RS) pattern, wherein the RS pattern occupies two or more consecutive symbols, and wherein the RS pattern comprises: A first cyclic prefix (CP); At least one RS signal; and A second CP.

2. The method according to claim 1, wherein The at least one RS signal is located between the first CP and the second CP in the RS pattern.

3. The method according to claim 1, wherein, The length of the RS signal in the time domain is T RS , the length of the first CP in the time domain is T CP1 , the length of the second CP in the time domain is T CP2 , and wherein, T RS , T CP1 and T CP2 The sum of and is equal to the length of the two or more consecutive symbols in the time domain.

4. The method according to claim 1, wherein, The length of the RS signal in the time domain is T RS , where the length of the first CP in the time domain is T CP1 , and the length of the second CP in the time domain is T CP2 , The method further includes: Transmit a first CP signal during the first CP, wherein the first CP signal is equivalent to the last T of the at least one RS signal CP1 portion; and Transmit a second CP signal during the second CP, wherein the second CP signal is equivalent to the first T of the at least one RS signal CP2 portion.

5. The method according to claim 4, wherein, T RS is equal to T CP2 .

6. The method according to claim 4, wherein The second CP signal is equivalent to one RS signal.

7. The method according to claim 1, wherein, The RS pattern occupies two consecutive symbols, where the length of the RS signal in the time domain is T RS , the length of the first CP in the time domain is T CP1 , the length of the second CP in the time domain is T CP2 , and where T CP1 is equal to the sum of the CP length of the signal transmitted in the first symbol of the two consecutive symbols and the CP length of the signal transmitted in the second symbol of the two consecutive symbols, and where T RS is equal to the length of the signal transmitted in the first symbol and is equal to the length of the signal transmitted in the second symbol.

8. The method according to claim 1, further comprising: Transmitting the at least one RS signal M times as part of the RS pattern, where M is an integer and M>1.

9. The method according to claim 8, wherein The length of the RS signal in the time domain is T RS , where the length of the first CP in the time domain is T CP1 , and the length of the second CP in the time domain is T CP2 , and the method further includes: Transmit a first CP signal during the first CP, wherein the first CP signal is equivalent to the last T of the at least one RS signal CP1 portion; and Transmit a second CP signal during the second CP, wherein the second CP signal is equivalent to the first T of the at least one RS signal CP2 portion.

10. The method according to claim 8, wherein, The length of the RS signal in the time domain is T RS , where the length of the first CP in the time domain is T CP1 , and the length of the second CP in the time domain is T CP2 , where T CP1 equals the length of the CP of the signal transmitted in the first symbol of the two or more consecutive symbols, where T CP2 is equal to the length of the CP of the signal transmitted in the second symbol of the two or more consecutive symbols, and where, M*T RS is equal to the sum of the lengths of the signals transmitted in the first symbol and the lengths of the signals transmitted in the second symbol.

11. The method according to claim 10, wherein M = 2, and Among them, T RS is equal to the length of the signal transmitted in the first symbol and is equal to the length of the signal transmitted in the second symbol.

12. The method according to claim 1, wherein, The RS pattern occupies N consecutive symbols, where N is an integer greater than 2.

13. The method according to claim 12, wherein, The at least one RS signal is located between the first CP and the second CP in the RS pattern.

14. The method according to claim 12, wherein, The length of the RS signal in the time domain is T RS , the length of the first CP in the time domain is T CP1 , the length of the second CP in the time domain is T CP2 , and wherein, T RS , T CP1 and T CP2 The sum of and is equal to the length of the N consecutive symbols in the time domain.

15. The method according to claim 12, wherein The length of the RS signal in the time domain is T RS , the length of the first CP in the time domain is T CP1 , the length of the second CP in the time domain is T CP2 , the method further includes: Transmit a first CP signal during the first CP, wherein the first CP signal is equivalent to the last T of the at least one RS signal CP1 portion; and Transmit a second CP signal during the second CP, wherein the second CP signal is equivalent to the first T of the at least one RS signal CP2 portion.

16. The method according to claim 15, wherein, T RS is equal to T CP2 .

17. The method according to claim 15, wherein, The second CP signal is equivalent to one RS signal.

18. The method according to claim 12, further comprising: Transmitting the at least one RS signal M times as part of the RS pattern, where M is an integer and M>1.

19. The method according to claim 18, wherein The length of the RS signal in the time domain is T RS , where the length of the first CP in the time domain is T CP1 , and the length of the second CP in the time domain is T CP2 , and the method further includes: Transmit a first CP signal during the first CP, wherein the first CP signal is equivalent to the last T of the at least one RS signal CP1 portion; and Transmit a second CP signal during the second CP, wherein the second CP signal is equivalent to the first T of the at least one RS signal CP2 portion.

20. The method according to claim 1, further comprising: Transmitting the RS pattern in a downlink (DL) symbol that at least partially overlaps with a gap symbol of the wireless device or another wireless device.

21. The method according to claim 20, further comprising Transmitting only the first part of the second CP.

22. The method according to claim 20, wherein The gap symbol is configured or indicated by a base station, and the method further comprises: Receiving, by the wireless device, an indication of the position of the gap symbol from another wireless device; and Determining a symbol that at least partially overlaps with the gap symbol; and Transmitting the RS pattern in a symbol that at least partially overlaps with the gap symbol.

23. The method according to claim 1, further comprising: Mapping the RS signal to a frequency resource every P resource elements (REs), where P is an integer greater than 0.

24. The method according to claim 23, further comprising: Not transmitting a signal in the REs between every P REs.

25. The method according to claim 23, further comprising: Configuring, by the wireless device, an offset S to indicate different REs for different reference signals.

26. The method according to claim 23, further comprising: Indicating, by the wireless device, to another wireless device a subcarrier spacing for receiving the RS pattern.

27. The method according to claim 23, further comprising: Determining the value of P based on the subcarrier spacing, Among them, the digital schemes of the subcarrier spacing of the wireless device and another wireless device are u A and u V , wherein, u V is not less than u A and Among them, P = 2 uV -u A .

28. The method according to claim 23, further comprising: Determining the value of P based on the subcarrier spacing of the wireless device and a reference subcarrier spacing, wherein, the digital schemes of the subcarrier spacing and the reference subcarrier spacing of the wireless device are u A and u R , wherein, u V is not less than u R and Among them, P = 2 uV -u R .

29. A method performed by a wireless device, comprising: Receiving a reference signal (RS) pattern, wherein the RS pattern occupies two or more consecutive symbols, and wherein the RS pattern comprises: A first cyclic prefix (CP); At least one RS signal; and A second CP.

30. The method according to claim 29, wherein, The at least one RS signal is located between the first CP and the second CP in the RS pattern.

31. The method according to claim 29, wherein, The length of the RS signal in the time domain is T RS , the length of the first CP in the time domain is T CP1 , the length of the second CP in the time domain is T CP2 , and wherein, T RS , T CP1 and T CP2 The sum of and is equal to the length of the two or more consecutive symbols in the time domain.

32. The method according to claim 29, wherein, The length of the RS signal in the time domain is T RS , where the length of the first CP in the time domain is T CP1 , and the length of the second CP in the time domain is T CP2 , and the method further includes: Receiving a first CP signal during the first CP, wherein the first CP signal is equivalent to the last T part of the at least one RS signal; and CP1 and Receiving a second CP signal during the second CP, wherein the second CP signal is equivalent to the first T of the at least one RS signal CP2 portion.

33. The method according to claim 32, wherein, T RS is equal to T CP2 .

34. The method according to claim 32, wherein, The second CP signal is equivalent to an RS signal.

35. The method according to claim 29, wherein, The RS pattern occupies two consecutive symbols, where the length of the RS signal in the time domain is T RS , the length of the first CP in the time domain is T CP1 , the length of the second CP in the time domain is T CP2 , and where T CP1 is equal to the sum of the CP lengths of the signals transmitted in the first symbol of the two consecutive symbols and the CP length of the signal transmitted in the second symbol of the two consecutive symbols, and where T RS is equal to the length of the signal transmitted in the first symbol and is equal to the length of the signal transmitted in the second symbol.

36. The method according to claim 29, further comprising: Receiving the at least one RS signal M times as part of the RS pattern, where M is an integer and M>1.

37. The method according to claim 36, wherein, The length of the RS signal in the time domain is T RS , where the length of the first CP in the time domain is T CP1 , and the length of the second CP in the time domain is T CP2 , and the method further includes: Receiving a first CP signal during the first CP, wherein the first CP signal is equivalent to the last T of the at least one RS signal CP1 portion; and Receive a second CP signal during the second CP, wherein the second CP signal is equivalent to the first T of the at least one RS signal CP2 portion.

38. The method according to claim 36, wherein, The length of the RS signal in the time domain is T RS , where the length of the first CP in the time domain is T CP1 , and the length of the second CP in the time domain is T CP2 , where T CP1 is equal to the length of the CP of the signal transmitted in the first symbol of the two or more consecutive symbols, where T CP2 is equal to the length of the CP of the signal transmitted in the second symbol of the two or more consecutive symbols, and where M*T RS is equal to the sum of the length of the signal transmitted in the first symbol and the length of the signal transmitted in the second symbol.

39. The method according to claim 38, wherein M = 2, and Among them, T RS is equal to the length of the signal transmitted in the first symbol and is equal to the length of the signal transmitted in the second symbol.

40. The method according to claim 29, wherein, The RS pattern occupies N consecutive symbols, where N is an integer greater than 2.

41. The method according to claim 40, wherein The at least one RS signal is located between the first CP and the second CP in the RS pattern.

42. The method according to claim 40, wherein, The length of the RS signal in the time domain is T RS , the length of the first CP in the time domain is T CP1 , the length of the second CP in the time domain is T CP2 , and wherein, T RS , T CP1 and T CP2 The sum of is equal to the length of the N consecutive symbols in the time domain.

43. The method according to claim 40, wherein, The length of the RS signal in the time domain is T RS , where the length of the first CP in the time domain is T CP1 , and the length of the second CP in the time domain is T CP2 , and the method further includes: Receiving a first CP signal during the first CP, wherein the first CP signal is equivalent to the last T of the at least one RS signal CP1 portion; and Receive a second CP signal during the second CP, wherein the second CP signal is equivalent to the first T of the at least one RS signal CP2 portion.

44. The method according to claim 43, wherein, T RS is equal to T CP2 .

45. The method according to claim 43, wherein, The second CP signal is equivalent to an RS signal.

46. The method according to claim 40, further comprising: Receiving the at least one RS signal M times as part of the RS pattern, where M is an integer and M>1.

47. The method according to claim 46, wherein, The length of the RS signal in the time domain is T RS , where the length of the first CP in the time domain is T CP1 , and the length of the second CP in the time domain is T CP2 , and the method further includes: Receiving a first CP signal during the first CP, wherein the first CP signal is equivalent to the last T of the at least one RS signal CP1 portion; and Receiving a second CP signal during the second CP, wherein the second CP signal is equivalent to the first T of the at least one RS signal CP2 portion.

48. The method according to claim 29, further comprising: Receiving the RS pattern in a downlink (DL) symbol that at least partially overlaps with a gap symbol of the wireless device or another wireless device.

49. The method according to claim 48, further comprising Receiving only the first part of the second CP.

50. The method according to claim 48, wherein The gap symbol is configured or indicated by a base station, and the method further comprises: Transmitting, by the wireless device, an indication of the location of the gap symbol to another wireless device; and Receiving the RS pattern in a symbol that at least partially overlaps with the gap symbol.

51. The method according to claim 29, further comprising: Receiving the RS signal to which every P resource elements (REs) are mapped to frequency resources, where P is an integer greater than 0.

52. The method according to claim 51, further comprising: Not receiving a signal in the REs between every P REs.

53. The method according to claim 51, further comprising: Receiving, from another wireless device, a configuration indicating an offset S of different REs for different reference signals.

54. The method according to claim 51, further comprising: Receiving, by the wireless device, an indication of a subcarrier spacing for receiving the RS pattern from another wireless device.

55. The method according to claim 51, Among them, The digital schemes of the subcarrier spacing of the wireless device and another wireless device are u and u, respectively. V and u A , where u V is not less than u A and Among them, 56. The method according to claim 51, Among them, The digital schemes of the subcarrier spacing and the reference subcarrier spacing of another wireless device are u A and u R , where u V is not less than u R and Among them, 57. An apparatus for wireless communication, the apparatus includes a processor configured to execute the method according to any one of claims 1 to 56.

58. A non-transitory computer-readable medium storing code, which when executed by a processor, causes the processor to implement the method according to any one of claims 1 to 56.

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