Method and system for inter-device positioning

Abstract

A method and system for a technique for inter-device positioning is disclosed. In one embodiment, a method of wireless communication includes performing inter-device communication according to a wireless device according to a set of resources, control information including at least one of inter-device control information or inter-device positioning control information, or one or more inter-device positioning reference signals having a relationship with at least one of an inter-device communication channel. In another embodiment, the method of wireless communication includes monitoring, by the wireless device, an inter-device sensing window, where the inter-device sensing window includes at least one of an inter-device data communication sensing window or an inter-device positioning reference signal sensing window having a relationship with the inter-device data communication sensing window, and performing, by the wireless device, a reference signal sensing operation using the inter-device positioning reference signal sensing window.

Description

[Technical field]

[0001] Technical Field This patent document relates generally to wireless communications. [Background technology]

[0002] background Mobile communication technologies are moving the world towards a more connected and networked society. The rapid growth of mobile communication and technological advances are driving the demand for increased capacity and improved connectivity. Other aspects such as energy consumption, device cost, spectrum efficiency, and latency are also important to meet the needs of various communication scenarios. Various technologies are being discussed, including new methods to provide higher quality of service, longer battery life, and improved performance. Summary of the Invention [Means for solving the problem]

[0003] overview This patent document describes, among other things, techniques for device-to-device positioning.

[0004] In one aspect, a method of data communication is disclosed, the method including: performing, by a wireless device, device-to-device communication according to one or more device-to-device positioning reference signals having a relationship with at least one of a set of resources, control information including at least one of device-to-device control information or device-to-device positioning control information, or device-to-device communication channels.

[0005] In another aspect, a method of data communication is disclosed that includes monitoring, by a wireless device, an inter-device sensing window, where the inter-device sensing window includes at least one of an inter-device data communication sensing window or an inter-device positioning reference signal sensing window having a relationship with the inter-device data communication sensing window, and performing, by the wireless device, a reference signal sensing operation using the inter-device positioning reference signal sensing window.

[0006] In another exemplary aspect, a wireless communications apparatus is disclosed comprising a processor configured to perform the aforementioned method.

[0007] In another exemplary aspect, a computer storage medium having stored thereon code for performing the method described above is disclosed.

[0008] These and other aspects are described herein. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 illustrates an example wireless communication system in accordance with some example embodiments of the disclosed technology.

[0010] [Diagram 2] FIG. 2 is a block diagram indication of a portion of an apparatus according to some embodiments of the disclosed technology.

[0011] [Diagram 3] FIG. 3 illustrates an example of an SL PRS in a SL resource pool.

[0012] [Figure 4] FIG. 4 shows a situation where the PRS exceeds the resource pool from the higher frequency side.

[0013] [Diagram 5] FIG. 5 shows a situation where the PRS exceeds the resource pool from the lower frequency side.

[0014] [Figure 6A] FIG. 6A shows two or more SCI_Ps or SPCIs (eg, indication information) that indicate a PRS. [Figure 6B] FIG. 6B shows that one SCI_P or SPCI (eg, indication information) in each resource pool indicates a corresponding portion of the PRS.

[0015] [Figure 7] FIG. 7 illustrates the situation when the PRS exceeds the SL resource pool and the case of a SCPI indication.

[0016] [Figure 8] FIG. 8 shows a special frequency band used as a transmission band (resource pool) of SCI_P.

[0017] [Figure 9] FIG. 9 shows a partial SL resource pool that is used (or reused) as the transmission band (resource pool) of SCI_P.

[0018] [Figure 10] FIG. 10 shows another SL resource pool used as a transmission band (resource pool) for SCI_P.

[0019] [Figure 11] FIG. 11 shows the PRS for the unlicensed band.

[0020] [Figure 12] FIG. 12 shows all PRS repetitions with an SCI_P indication.

[0021] [Figure 13] FIG. 13 shows only the first PRS iteration with an SCI_P indication.

[0022] [Figure 14]FIG. 14 shows each PRS cycle with an SCI_P indication.

[0023] [Figure 15] FIG. 15 shows one SCI_P indication every three PRS cycles.

[0024] [Figure 16] FIG. 16 shows the permutation and combination method.

[0025] [Figure 17] FIG. 17 shows the frequency hopping indication of SCI_P.

[0026] [Figure 18A] FIG. 18A shows a window for the SL PRS mode 2 resource selection method. [Figure 18B] FIG. 18B shows the PRS sensing window. [Figure 18C] FIG. 18C shows portions of a PRS sensing window.

[0027] [Figure 19] FIG. 19 illustrates an example process for wireless communication in accordance with some example embodiments of the disclosed technology.

[0028] [Figure 20] FIG. 20 illustrates another example process for wireless communication according to some example embodiments of the disclosed technology. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Detailed Description Section headings are used herein for ease of understanding only and are not intended to limit the scope of the embodiments to the section they are written in. Furthermore, although the embodiments are described with reference to 5G examples, the disclosed techniques may be applied to wireless systems using protocols other than 5G or 3GPP protocols.

[0030] 1 illustrates an example of a wireless communication system (e.g., a Long Term Evolution (LTE), 5G, or NR cellular network) including a BS 120 and one or more user equipments (UEs) 111, 112, 113, and 114. In some embodiments, the uplink transmissions (131, 132, 133) may include uplink control information (UCI), higher layer signaling (e.g., UE assistance information or UE capabilities), or uplink information. In some embodiments, the downlink transmissions (141, 142, 143) may include DCI or higher layer signaling or downlink information. In some embodiments, a UE (e.g., 112, 113, 114, 115, 116) may be directly connected to another UE (e.g., 112, 113, 114, 115, 116) using device-to-device or sidelink communications (151, 152, 153, 154, 155, 156) without relaying their data through the BS 120. A UE may be, for example, a smartphone, a tablet, a mobile computer, a machine-to-machine (M2M) device, a terminal, a mobile device, an Internet of Things (IoT) device, etc.

[0031] 2 is a block diagram representation of a portion of an apparatus according to some embodiments of the disclosed techniques. An apparatus 205, such as a network device or base station or wireless device (or UE), can include processor electronics 210, such as a microprocessor, that implements one or more of the techniques presented herein. The apparatus 205 can include transceiver electronics 215 to transmit and / or receive wireless signals via one or more communication interfaces, such as an antenna 220. The apparatus 205 can include other communication interfaces for transmitting and receiving data. The apparatus 205 can include one or more memories (not explicitly shown) configured to store information, such as data and / or instructions. In some implementations, the processor electronics 210 can include at least a portion of the transceiver electronics 215. In some embodiments, at least some of the disclosed techniques, modules, or functions are implemented using the apparatus 205.

[0032] When performing sidelink positioning operations, a positioning reference signal (PRS) in New Radio (NR) is scheduled by a base station (BS). However, there are some problems when transmitting and receiving a PRS at a sidelink location.

[0033] The fifth generation (5G) mobile network with enhanced connectivity will play an increasingly important role in the development of positioning technologies, such as device-to-device positioning technology. Many researches are being conducted to improve the accuracy of positioning technologies. 3GPP Rel-18 considerations are as follows:

[0034] [Table 1]

[0035] In the above Table 1, "AoA" stands for Angle of Arrival, "TDoA" stands for Time Difference of Arrival, and "RTT" stands for multi-round trip time.

[0036] RAN1 for Rel-17 positioning provides NR position PRS. In addition, current standards (e.g., 38.214) provide sidelink (SL) sensing window and resource selection as follows:

[0037] [Table 2-1] [Table 2-2]

[0038] Exemplary embodiment 1: SCI_P design showing SL-PRS

[0039] The disclosed technology can be implemented in some embodiments to sense, detect, or monitor sidelink control information (e.g., SCI_P) indicating SL PRS by the originating terminal and / or original sidelink control information (SL SCI) by other terminals. To ensure successful monitoring of sidelink control information, the following schemes can be used according to some implementations of the disclosed technology.

[0040] Case 1: Add an indication of a sidelink positioning reference signal (SL PRS) to the SL SCI including the first stage SCI and / or the second stage SCI.

[0041] Examples of the indication of the SL PRS may include at least one of whether the SL PRS is transmitted periodically, the period of the SL PRS, the number of repetitions of the SL PRS, and the time-frequency domain location of the SL PRS, the pattern of the SL PRS.

[0042] Case 2: Reuse SCI format 1-A, and change the domain indicating the physical sidelink control channel / physical sidelink shared channel (PSCCH / PSSCH) in the SCI structure to relevant information indicating the SL PRS.

[0043] In one embodiment, frequency resource allocation, time resource allocation, and resource reservation period may be used to indicate the frequency and / or time domain resources for the SL PRS and the resource reservation period for the PRS, respectively.

[0044] Additionally, one bit reserved in SCI format 1-A may be used to indicate whether the SCI indicates a PSSCH or SL PRS.

[0045] Some fields in SCI format 1-A that are not used in the SL PRS may also be reused to implicitly indicate that the SCI indicates a SL PRS or a PSSCH.

[0046] In one embodiment, assuming that the transmission of the PRS is occupied by the entire resource pool or the entire bandwidth, a special value of the frequency resource allocation field can be used, for example, this field is identified by all zeros to indicate the PRS in the current configuration.

[0047] In another embodiment, if a 32 slot SL PRS and maximum retransmission is required only once, the SCI_P of the SL PRS can be differentiated by the bits saved by the time resource allocation.

[0048] [Table 3-1] [Table 3-2]

[0049] In some implementations, reference signals involved in SL positioning, such as positioning reference signals, are referred to as PRSs or SL PRSs.

[0050] In some embodiments, the PRS indication may be SL SCI or position reference information, or other indication information that may be called SCI_P or SPCI. In other words, the SPCI may be SCI or may include SCI and SL positioning control information indicating PRS or PSSCH. In some embodiments, the SPCI is a broader concept that includes the SCI.

[0051] The time-frequency domain relationship between the SCI_P and the PRS may be time division based and / or frequency division based, etc. In this patent document, a time division based relationship is described.

[0052] Exemplary embodiment 2: SCI_P showing SL-PRS in different frequency domain ranges

[0053] Case 1: SL PRS is in the SL resource pool

[0054] FIG. 3 illustrates an example of an SL PRS in a SL resource pool.

[0055] Case 1.1: If the frequency range of the SL PRS does not exceed the frequency range of the SL resource pool, the SL PRS may be indicated by one or more indication information segments (e.g., SCI_P, etc.) in the resource pool. In some implementations, the term "resource pool" can be used to refer to a set of resources or a resource set.

[0056] Case 1.2: If the frequency range of the SL PRS does not exceed the frequency range of the SL resource pool, the SL PRS may transmit without additional SCI_P indication.

[0057] For example, SL PRS can be combined with PSCCH / PSSCH. The transmission ratio of fixed configuration data PSSCH to PRS is n:m. That is, the transmission of n PSSCH slots corresponds to the transmission of m SL PRS. This is sometimes called the "PRS pattern".

[0058] Case 1.3: Whether to indicate SL PRS or part of PRS is decided according to the channel busy ratio (CBR) / channel occupancy ratio (CR) measurement of the current resource pool and / or other information related to each resource pool or indication of higher level signaling. If the current resource pool is relatively idle, the SL PRS may be transmitted without indication since the collision probability between the SL PRS and the PSCCH / PSSCH is very low.

[0059] Case 2: The SL PRS frequency domain exceeds one SL resource pool.

[0060] Case 1 of example embodiment 2 describes whether and how to do SL PRS in the SL resource pool indicated by SCI_P. If the frequency domain range of the PRS exceeds the bandwidth of the SL resource pool, various schemes for one resource pool (or resource set or set of resources) can be applied to all resource pools that contact the PRS in the frequency domain.

[0061] Case 2.1: Various possible situations of SL PRS exceed the frequency domain of a resource pool (or resource set or set of resources).

[0062] Case 2.1.1: PRS exceeds the resource pool from the higher frequency side.

[0063] Figure 4 shows a situation where the PRS exceeds the resource pool from the high frequency side.

[0064] Case 2.1.2: PRS exceeds resource pool from the low frequency side.

[0065] FIG. 5 shows a situation where the PRS exceeds the resource pool from the lower frequency side.

[0066] Case 2.1.3 PRS exceeds the resource pool from both the high-frequency and low-frequency sides.

[0067] Figure 6A shows two or more SCI_Ps or SPCIs (e.g., indication information) indicating a PRS, and Figure 6B shows one SCI_P or SPCI (e.g., indication information) in each resource pool indicating a corresponding portion of a PRS.

[0068] Case 2.2: SL SPCI operates uniformly or separately in each resource pool.

[0069] Taking an example of an SL PRS extending from the low-frequency and high-frequency directions of a resource pool and contacting the resource pool at both ends, the disclosed technology can be implemented in some embodiments to apply the scheme of the SL PRS to each resource pool uniformly or separately.

[0070] Case 2.2.1: If the PRS exceeds the SL resource pool, one or more instructions for the SL PRS (eg, SCI_P, etc.) may be used for each resource pool (eg, see FIG. 6).

[0071] Case 2.2.2: When the PRS exceeds the SL resource pool, the indication method of the PRS can be applied to each resource pool separately.

[0072] In some implementations, one or more indications (eg, SCI_P, etc.) may be used in each resource pool in various situations where the SL PRS spans the frequency domain of the resource pool.

[0073] The one or more indications may indicate a PRS or a different portion of a PRS within each resource pool.

[0074] With reference to Figure 6A, multiple SCI_Ps (or SPCIs) 611, 613, and 615 represent a PRS 621. With reference to Figure 6B, SCI_P (or SPCI) 612 represents a portion 622 of the PRS, SCI_P (or SPCI) 614 represents a portion 624 of the PRS, and SCI_P (or SPCI) 616 represents a portion 626 of the PRS.

[0075] 7, one or more schemes for SL PRS indication information (e.g., SCI_P, etc.) may be applied to a first resource pool 710. A second resource pool 720 between the first resource pool 710 and a third (e.g., last) resource pool 730 may be considered "idle" and no indication information of the SL PRS may be provided.

[0076] In some implementations, the CBR / CR measurements or other information associated with each resource pool or indication of higher level signaling to the resource pool can be used to determine the resource pools to which the indication information can be applied. In one example, a resource pool is selected, the indication information of the PRS is added to a set of resource pools included in the PRS frequency domain, and the corresponding indication information is applied to the set of resource pools.

[0077] Case 2.3: Indication information for SL PRS is transmitted separately in one or more frequency bands (e.g., resource pools). In some implementations, a special resource pool and / or multiple resource pools can be used for the SL PRS indication information.

[0078] Figure 8 shows a special frequency band used as the transmission band (resource pool) of SCI_P. Figure 9 shows a partial SL resource pool used (or reused) as the transmission band (resource pool) of SCI_P. Figure 10 shows another SL resource pool used as the transmission band (resource pool) of SCI_P.

[0079] In some implementations, one or more reference / baseline frequency band ranges (e.g., resource pools) within a range contained in the SL PRS frequency domain may be selected. The time-frequency domain location and other information of the SL PRS may be obtained by blind detection of the SCI_P in the one or more selected frequency band ranges. The one or more selected frequency band ranges may be a separate SL resource pool (as shown in FIG. 8), or part of a SL resource pool combined non-resource pool range (as shown in FIG. 9), or a frequency band range completely independent from the SL resource pool (as shown in FIG. 10), and the SCI_P is transmitted only within this frequency band range.

[0080] The frequency band ranges of different PRSs within the full bandwidth are different, and the parameters of the SCI_P, such as the range and the number of reference frequency bands, can also be flexibly changed. The specific frequency domain range or the number of reference frequency bands and other parameters can be directly or implicitly signaled to the communication equipment and devices via pre-configuration or high-level signaling indication.

[0081] Case 3: SL PRS in non-ITS bands

[0082] FIG. 11 shows a PRS for an unlicensed band.

[0083] In some implementations, the SL PRS or NR PRS may be configured in the unlicensed spectrum and indicated by the SCI_P / PRS or NR uplink and downlink related information. The signals may be cored from licensed and / or unlicensed bands. The frequency band of the PRS may be obtained by pre-configuration and / or RRC signaling and / or MAC CE and / or SCI and / or DCI, etc.

[0084] Taking the SL PRS as an example, if the PRS is in an unlicensed band, the method described for the embodiment described in this patent document also applies. In some implementations, the SCI_P takes a special frequency band. As shown in Figure 11, the PRS and the SL resource pool do not overlap each other in the frequency domain, and the PRS can be regarded as an illegal frequency band adopted in NR-U. In some implementations, the SCI_P can still indicate PRS-related information.

[0085] Exemplary embodiment 3: Repetition or cycle of PRS transmission and whether to indicate using SCI_P

[0086] When transmitting a SL PSSCH, the SL SCI is also transmitted in the slot, but the SL PRS transmission is not necessarily bound to the SCI_P.

[0087] It should be noted that this embodiment only takes the PRS in one resource pool as an example. This embodiment is also applicable when the PRS is extended to two or more resource pools. For each SL resource pool, the contents described in this embodiment can be considered separately or comprehensively.

[0088] Case 1: PRS Repetition

[0089] Case 1.1: Reusing SCI retransmission reservation

[0090] FIG. 12 shows all PRS repetitions with an SCI_P indication.

[0091] Within a particular time domain (e.g., 32 slots), a PRS can be indicated by an SCI_P. In some embodiments, the maximum number of transmissions of a PRS indicated by an SL SCI is three. However, the number of PRS repetitions is not limited to three. If SCI retransmission reservation is used here, each PRS can be indicated by an SCI_P from one or two previous transmissions, as shown in FIG. 12.

[0092] Case 1.2: One SCI_P showing multiple repetitions of the PRS

[0093] FIG. 13 shows only the first PRS iteration with an SCI_P indication.

[0094] Within a particular time domain, a PRS can be indicated by an SCI_P, and the maximum number of transmissions of a PRS indicated by an SL SCI is 3. To reduce some repetitions of SCI_P, only one SCI_P is used to indicate three repetitions of a PRS, as shown in Figure 12. In another embodiment, one SCI_P can be used to indicate more than three repetitions of a PRS, with a fixed gap between adjacent PRS, to make it a PRS pattern.

[0095] Case 2: Periodic PRS

[0096] Figure 14 shows each PRS cycle with an SCI_P indication, and Figure 15 shows one SCI_P indication every three PRS cycles.

[0097] In order to reduce some SCI_P, in the case of periodic PRS transmission, one SCI_P can be used to indicate the PRS for N cycles. When N is equal to 1, it is the same as the original scheme of SL, as shown in Figure 14. When N is equal to 3, this case can reduce two SCI_Ps every 3 PRS cycles compared to the original scheme, as shown in Figure 15.

[0098] Case 2.1: In one example, when N=1, each PRS requires an SCI_P to indicate.

[0099] Case 2.2: In another example, when N=3, three PRSs require only one SCI_P to indicate.

[0100] Case 3: Cyclic PRS and iterative permutation combinations

[0101] In some embodiments, the above two cases of repeating PRS transmission and periodic PRS transmission can be combined. For example, if the repeating PRS uses the scheme described in case 1.1, the periodic PRS transmission may use the scheme of case 2.1 or case 2.2. If the repeating PRS uses the scheme of case 1.2, there are also two schemes for periodic PRS transmission.

[0102] It should be noted that the above methods in Case 1 and Case 2 can also be applied when the PRS exceeds one resource pool.

[0103] The disclosed techniques can be implemented in several embodiments, for example, case 3 can provide a permutation scheme when the PRS exceeds one resource pool.

[0104] FIG. 16 shows the permutation and combination method.

[0105] Case 1: As shown in FIG. 16, when only SCI_P 1610 is used to indicate PRS, two or more cycles and repeated PRS transmissions can be indicated by one SCI_P.

[0106] Case 2: As shown in FIG. 16, when only SCI_P 1610 and SCI_P 1630 are used to indicate PRS, each cycle of PRS transmission requires an SCI_P indication for reservation, and repeated PRS does not use an SCI_P indication.

[0107] Case 3: As shown in FIG. 16, when all SCI_P 1610, 1620, 1630 are used to indicate PRS, each cycle of PRS transmission and each repetition of the PRS uses an SCI_P indication.

[0108] Case 4: As shown in FIG. 16, when only SCI_P 1610 and SCI_P 1620 are used to indicate PRS, one SCI_P can indicate more than one cycle of PRS transmission, and each repetition of PRS requires an SCI_P indication.

[0109] Exemplary embodiment 4: SCI_P frequency hopping within or between resource pools to improve performance

[0110] In the original SL resource selection scheme, the PSCCH / PSSCH generally does not occupy the entire resource pool or the entire BWP bandwidth. When using the Mode 2 selection method to select resources, the selected resources of different retransmission resource positions may be in different subchannels than the initial transmission or the position of the previous retransmission. Therefore, the diversity gain can improve the multipath effect and address the problems related to interference on reception at different frequencies to some extent.

[0111] For the SL PRS, the frequency domain range of each iteration typically takes up all of the subchannels in the resource pool by pre-configuration or dynamic indication, and the transmission range of the SL PRS of each iteration in the frequency domain is approximately the same.

[0112] The SL PRS may be indicated by SCI_P, and when the original SL scheme is used in which the PSCCH is in the subchannel that is the lowest frequency range of the starting subchannel of the PSSCH frequency domain, the SCI_P may be in the first subchannel from the low frequency of the SL resource pool. This scheme can reduce the consumption of detecting the SPCI.

[0113] A PRS affecting SCI_P reception and the frequency domain of SCI_P remaining unchanged for several iterations of SCI_P may ultimately lead to poor reception of the SL PRS.

[0114] Therefore, multiple SCI_Ps can be used for one SL PRS to better receive SCI_P and make full use of the frequency domain diversity gain of SCI_P. In addition, the frequency domains of SCI_P corresponding to different repetitions of PRS can be flexibly adjusted. The frequency domains of SCI_P transmissions can be in one resource pool, in different resource pools, or not within the range of the SL resource pool. For example, the special band for SCI_P in case 2.3 of exemplary embodiment 2 can also be applied to one SCI showing multiple SL PRS repetitions.

[0115] If the PRS indicates the SL PRS via the SCI in the resource pool, and each SL PRS has an SCI_P indication, the SCI_P can improve its reception performance via frequency modulation.

[0116] FIG. 17 shows the frequency hopping indication of SCI_P.

[0117] As shown in Figure 17, for PRSs with different repetitions, the SCI_Ps vary among different subchannels in a resource pool (e.g., subchannels can be selected randomly, subchannels with better channel conditions can be selected according to some measurement / indication information, or subchannels can be selected by polling according to a specific rule and / or pre-configuration, etc.). In addition, the time and frequency domain locations of the SCI_Ps indicating a PRS are not fixed with respect to the PRS.

[0118] On the other hand, if the frequency domain of SCI_P is fixed within one resource pool (or outside the resource pool) and there is only detection of SCI_P on some fixed subchannels, the repetitions and complexity of blind detection can be reduced.

[0119] Exemplary embodiment 5: Resource selection scheme related to PRS mode 2, taking PRS communication into account

[0120] As mentioned above, there are many possibilities for the SCI_P to indicate the SL PRS in combination with the (bound / unbound) relationship of the SL resource pools. In some embodiments, the SL PRS Mode 2 method from the original SL Mode 2 resource selection scheme can be applied as described in this patent document.

[0121] Case 1: PRS mode 2 detection

[0122] In some embodiments, mode 2 of the SL PRS can be used. In some embodiments, the first step is a sensing operation. Sensing operation in SL refers to receiving or acquiring the RSRP of the PSCCH / PSSCH. For the SL PRS, the sensed RSRP can be measured from the SCI_P or the SL PRS. In some embodiments, which reference signal is used to measure the RSRP can be determined based on a high level configuration or a predefined, explicit or implicit dynamic indication.

[0123] In some embodiments, when one SCI_P indicates multiple PRS, the corresponding Mode 2 sensing can determine whether the resource is occupied by measuring the RSRP from the PRS and / or the SPCI and comparing it with a preset RSRP threshold of the PRS.

[0124] Case 2: PRS resource selection method for isolation mode 2

[0125] The original NR PRS is preconfigured and dispatched directly by the base station (BS). Other receiving devices can directly acquire it from the corresponding location without sensing. For Mode 2 SL PRS resource selection, the base station is not involved in resource allocation, and the transmitting equipment needs to monitor the channel and transmit on the available resources.

[0126] Here, it is assumed that the SL PRS and the SL are not in the same frequency band. For example, the SL PRS is transmitted on an unlicensed spectrum. That is, signals transmitted in the SL resource pool, such as PSCCH / PSSCH, do not affect the transmission of the SL PRS, and only the effects of other PRSs in the system should be considered. In the frequency domain, where there is no shared frequency band between the PRS and the SL resource pool, only PRS sensing is required.

[0127] Case 2.1: PRS mode 2 sensing window length in the time domain

[0128] In order to avoid the reserved resource positions of other PRSs during resource selection, it is necessary to consider the cycle of SL PRS / PRS transmission and transmission delay and other issues from the perspective of time domain. Taking the transmission period of NR PRS as an example, the method of the length of the PRS sensing window on the time domain is described below.

[0129] The cycle range of the PRS is quite different from the cycle range of the PSSCH given by the parameter -sl-resourcereserveperiod-r16 in the current standard (e.g. 38.331). For example, the period of the PRS can be 10240 ms, while the maximum data period of the current protocol PSCCH / PSSCH is 1000 ms. Therefore, the 100 ms and 1100 ms of -sl-sensingwindow-r16 used for the two types of PSSCH cycles are no longer applicable.

[0130] Method: Quantize the PRS period value into n levels, and the value corresponding to the quantization level is the optional sensing window length of the PRS.

[0131] For example, the cycle ranges that a PRS can employ are {4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 640, 1280, 2560, 5120, 10240}.

[0132] In one embodiment, when n is equal to 1, the sensing requirement of every PRS cycle must be satisfied, and the length of the PRS sensing length should be at least 10240 ms (which can be made equal regardless of processing delays). For example, 10241 or 10250, or other values ​​greater than 10240, can be selected as the sensing window length.

[0133] In another embodiment, when n is equal to 2, two sensing window lengths can be selected for the PRS. For example, if the PRS cycle is less than 320 ms, one PRS sensing window length, such as 321 ms, is adopted. If the PRS is greater than 320 ms, another PRS sensing window length, such as 10241 ms, is adopted.

[0134] In another embodiment, when the value of n is the number of all candidate cycles of the PRS, every PRS cycle has its own corresponding resource selection window length. If the PRS cycle in the system is only 4 ms, the sensing window length of the PRS can be 5 ms, which can meet the corresponding sensing requirement.

[0135] Case 2.2: PRS Mode 2 Sensing Window Frequency Domain

[0136] In order to avoid reserved resource locations of other PRSs during resource selection, from a frequency domain perspective, it is necessary to consider the presence of other PRSs or other interfering signals / channels in the frequency domain of the currently transmitted SL PRS.

[0137] Scheme: The frequency domain range of the PRS Mode 2 sensing window may be the entire frequency band occupied by the currently transmitted SL PRS or a portion of the low interference / no associated signal interference frequency band range that is excluded according to higher level signaling or another pre-configuration / indication / implied indication / measurement feedback.

[0138] In some embodiments, the frequency domain range of the PRS Mode 2 sensing window may be all frequency bands occupied by currently transmitted SL PRSs, or may exclude some low interference / no correlation according to higher level signaling or another pre-configuration / indication / implicit indication / measurement feedback, etc.

[0139] Case 2.3: PRS Mode 2 Selection Window

[0140] The resource selection window for PSCCH / PSSCH is per SL resource pool, and the time domain length of the selection window may be affected by the Packet Delay Budget (PDB).

[0141] Method: For the resource selection window of the SL PRS, the frequency domain needs to be related to the frequency domain range actually transmitted by the PRS, and the delay requirement of the SL PRS needs to be considered in the time domain. For example, there is a certain delay requirement for transmitting the SL PRS after the target UE's request to ensure the timeliness of the positioning reference signal.

[0142] For periodic SL PRS, the length of the selection window should not exceed the total duration of the SL PRS indicated by one SCI_P. For example, if each SL PRS has an SCI_P indication, it should be guaranteed that the resource selection window of the SL PRS ends before the next SL PRS is transmitted at the last moment. That is, the selection window should be completed before the arrival of the next SL PRS and sufficient processing delay should be ensured.

[0143] Solution: If it is periodic SL PRS, the total duration of the SL PRS indicated by one SCI_P should not be exceeded (e.g. each SL PRS has an SCI_P indication, and the last moment of the resource selection window of the SL PRS must be guaranteed before the next SL PRS is transmitted, i.e. the selection window must be guaranteed to end before the next SL PRS, ensuring sufficient processing).

[0144] Case 3: PRS resource selection method for Mode 2 (considering the impact of SL PSCCH / PSSCH)

[0145] Figure 18A shows a window for the SL PRS mode 2 resource selection method, Figure 18B shows a PRS sensing window, and Figure 18C shows multiple portions 1810, 1820, 1830 of the PRS sensing window.

[0146] When selecting a Mode 2 resource allocation method for the SL PRS, the impact of resource occupancy of the SL PSCCH / PSSCH on the SL PRS needs to be considered.

[0147] Through the detailed analysis of Examples 1 and 2, there are many possibilities of SL PRS indication by SCI_P combined with the (bonded / unbonded) relationship of SL resource pools. Here, we only take one case as an example to illustrate the Mode 2 method of SL PRS, which is also applicable to other cases such as PRS without SCI_P indication.

[0148] The sensing windows are as follows:

[0149] First, the equipment or communication device transmitting the SL PRS needs to know if there are other SL PRS transmissions or reservations / occupancies etc. This can be achieved by a separate Mode 2 PRS resource selection method described in Case 2. As shown in Figure 18, the SL PRS has a special indication frequency band that coincides with resource pool 2. That is, the transmission of the SL PRS can be obtained through SCI_P monitoring of this frequency band, which can be called the SL PRS sensing window.

[0150] In addition, the device's sensing window needs to include SL signals / channels such as PSCCH / PSSCH in all SL resource pools that are touched or in contact with the SL PRS. As shown in Figure 18, the device needs to sense resource pool 1, resource pool 2, and resource pool 3. These sensing windows are configured in each resource pool according to its resource pool configuration.

[0151] In one embodiment, the final SL PRS sensing window may be a combination of the two types of sensing windows described above.

[0152] In another embodiment, the final SL PRS sensing window covers at least the above two sensing windows in the time-frequency domain.

[0153] In another embodiment, in the time-frequency domain, according to the related information of each resource pool / frequency band / time period (the information can be obtained from high level indication / pre-configuration / PC5 RRC / MAC CE / dynamic / explicit / implicit indication), the final SL PRS sensing window may include a part of the above sensing windows or a combination of sensing windows as the final sensing window.

[0154] In one embodiment, the final SL PRS sensing window may be a combination of the two types of sensing windows described above.

[0155] In another embodiment, the final SL PRS sensing window covers at least the above two sensing windows in the time-frequency domain.

[0156] In another embodiment, the final SL PRS sensing window can be selected in time-frequency domain according to the related information of each resource pool / frequency band / period (the information can be from higher layer indication / pre-configuration / RRC / MAC CE dynamic / dominant / recessive indication). A part of the sensing window or a combination of them can be selected as the final sensing window.

[0157] This scheme can be extended in various ways to indicate the SL PRSs and the relationships between different PRSs and the SL resource pool by the SCI_P.

[0158] Selection window: Considering the impact of the SL PSCCH / PSSCH, the selection window for the Mode 2 SL PRS satisfies the same conditions as the separate Mode 2 PRS sensing window.

[0159] Exemplary embodiment 6: Resource selection scheme associated with SL PSCCH / PSSCH mode 2 considering PRS communication

[0160] After the SL PRS is introduced into the SL, the impact on Mode 2 mainly includes the sensing window and resource selection window of PSCCH / PSSCH, and the sensing window and resource selection window of SL PRS. In the exemplary embodiment 5, the sensing window and resource selection window related to SL PRS are briefly described. This embodiment mainly analyzes the Mode 2 scheme of PSCCH / PSSCH for devices in the resource pool.

[0161] In the absence of PRS, as in the original SL mode 2 method, it is necessary to monitor the PSCCH / PSSCH in the resource pool to determine whether other resources are reserved. After adding the SL PRS, the PSCCH / PSSCH transmitted by the device is still in the resource pool. That is, it is still necessary to maintain the original sensing window range, and at the same time, it is necessary to determine whether there is reserved occupancy of the SL PRS resources, including periodic and aperiodic occupancy. Therefore, it is necessary to optimize the sensing window of the PSCCH / PSSCH.

[0162] Case 1: PSCCH / PSSCH resource allocation for Mode 2 without PRS (without considering the impact of SL PRS)

[0163] There is no need to modify the PSCCH / PSSCH mode 2 scheme without taking into account the SL PRS. The original scheme is still maintained. Transmissions are made in each resource pool and available resources are selected.

[0164] Case 2: PSCCH / PSSCH resource allocation for Mode 2 with SL PRS (considering the impact of SL PRS)

[0165] Through the analysis of Example 2 and Example 3, there are many possibilities of SL PRS indication by SCI_P combined with SL resource pool (bonded / unbonded) relationship. Here, only one case is taken as an example to explain the Mode 2 scheme of SL PRS, which is also applicable to other cases such as PRS without SCI_P indication (Figure 18C also shows an example of the window of SL PSCCH / PSSCH Mode 2 resource selection method, which is the same as a part of the window of PRS).

[0166] The sensing windows are as follows:

[0167] First, the equipment or communication device transmitting the PSCCH / PSSCH needs to sense, detect, or monitor within its own SL resource pool, where the sensing window is the original sensing window of the SL resource pool, without considering the SL PRS in the process.

[0168] Second, the device transmitting the PSCCH / PSSCH needs to know if there is an SL PRS in the resource pool, which can be achieved by a separate Mode 2 PRS resource selection method described in Case 2.

[0169] As shown in Figure 18, assuming that the UE is triggered to transmit the PSCCH / PSSCH on resource pool 2, the UE first needs to transmit the PSCCH / PSSCH signal / channel in the resource pool according to the parameters of the resource pool in resource pool 2. Secondly, the UE needs to sense whether there is a SL PRS in the resource pool. At this time, the UE needs to sense according to the independent sensing manner of the SL PRS in the frequency domain where the SCI_P is located.

[0170] For example, as shown in Figure 18, the SCI_P sensing domain of the UE multiplexes the SL resource pool 2, so that the frequency domains of the two types of sensing required by the UE coincide. In the time domain, the periodicity of the PSCCH / PSSCH in the resource pool and the periodicity of the SL PRS associated with the frequency band need to be considered respectively.

[0171] If the UE transmits on resource pool 3, it needs to sense the PSCCH / PSSCH on resource pool 3. Also, the SCI_P in resource pool 2 needs to sense according to the sensing window length of SL PRS separate sensing.

[0172] In one embodiment, the final SL PSCCH PSSCH sensing window may be a combination of the above two types of sensing windows.

[0173] In another embodiment, the final SL PSCCH / PSSCH sensing window covers at least the above two types of sensing windows.

[0174] In another embodiment, in the time-frequency domain, according to the related information of each resource pool / frequency band / time period (the information can be obtained from high level indication / pre-configuration / PC5 RRC / MAC CE / dynamic / explicit / implicit indication), the final SL PSCCH / PSSCH sensing window can include some of the above sensing windows, or a combination thereof can be selected as the final sensing window.

[0175] This scheme can be extended in various ways to indicate the SL PRSs and the relationships between different PRSs and the SL resource pool by the SCI_P.

[0176] Selection window: Considering the impact of SL PRS, the selection window for Mode 2 SL PSCCH / PSSCH is the same as that of the original SL Mode 2 sensing window.

[0177] Exemplary embodiment 7: Comprehensively consider resource selection schemes related to SL mode 2 after adding PRS

[0178] After the introduction of SL PRS, except for the independent resource allocation scheme for PSCCH / PSSCH and PRS (e.g., Scheme 1 below: adopting two sets of different sensing windows and resource selection windows), the entire SL mode 2 processing scheme can also comprehensively consider PSCCH / PSSCH and SL PRS and process their sensing windows / resource selection windows unified (Scheme 2 below), that is, the same transmission window and / or resource selection window can be used regardless of whether the device wants to transmit SL PRS or PSCCH / PSSCH.

[0179] Case 1: SL mode 2 is considered comprehensively, and each is carried out in two sets.

[0180] Scheme 1: Mode 2 When a resource selection is triggered, the corresponding sensing and / or selection windows are selected for execution according to different types.

[0181] In some embodiments, only the sensing and selection windows of the SL PRS are used when triggering resource selection for the SL PRS at time n.

[0182] In some embodiments, only the optimized PSCCH / PSSCH sensing and selection windows are used when triggering PSCCH / PSSCH resource selection at time n.

[0183] Case 2: SL mode 2 is considered comprehensively and implemented in one set

[0184] Method 2: Comprehensively consider the PSCCH / PSSCH and SL PRS, and jointly process the sensing window / selection window, including the unified sensing / selection window time domain and / or frequency domain.

[0185] Case 2.1: Joint consideration of SL sensing windows

[0186] Time domain of the joint SL sensing window

[0187] In order to avoid the reserved resource positions of other PRSs during resource selection, it is necessary to consider the cycles of SL PRS / PRS transmission delay and other issues from the time domain perspective. To avoid that the time domain length of the original SL sensing window cannot cover some large PRS cycles when it is used as the unified window length, the time domain length of the sensing window should be appropriately modified.

[0188] The cycle range of PRS is quite different from the cycle range of PSSCH given by parameter -sl-resourcereserveperiod-r16 in 38.331. For example, the period of PRS can be 10240ms, but the maximum data period of current protocol PSCCH / PSSCH is 1000ms. Therefore, the 100ms and 1100ms of -sl-sensingwindow-r16 used for the two types of PSSCH cycles are no longer applicable.

[0189] In the time domain of the PSCCH / PSSCH sensing window, according to current standards (e.g., 38.331), the maximum period of the PSCCH / PSSCH is 1000 ms, and the cycle range of the PRS is quite different from the cycle range of the PSSCH given by the parameter sl-resourcereserveperiod-r16 of the current standard (e.g., 38.331).

[0190] For example, the period of the PRS can be 10240 ms, so the sensing window lengths used for the two types of PSSCH cycles are no longer applicable, i.e., 100 ms and 1100 ms in sl-sensing window-r16 are no longer applicable. Therefore, it is necessary to comprehensively consider the applicability of the sensing length of the PSCCH / PSSCH to the sensing length of the PRS.

[0191] Case 2.1.1: Joint SL Sensing Window (Case 1)

[0192] Case 1: The step of determining the length of the PRS sensing window is L PRS =nL PSSCH The length of the sensing window is the length of the PRS pattern in the time domain.

[0193] Alternatively, according to the above scheme 1, only when transmitting the PRS, the sensing is n times the PSCCH / PSSCH sensing window length. When only PSCCH / PSSCH is selected in the Mode 2 resource, it is still adopted according to the normal sensing window length.

[0194] N can be flexibly adjusted according to the PRS cycle in the system.

[0195] In one example, if the period of the PSCCH / PSSCH is less than 100 ms, the PSCCH / PSSCH sensing window length is 100 ms, where n can be 1 if the period of the SL PRS is also less than 100 ms.

[0196] In another example, if the PSCCH / PSSCH period is less than 100 ms, the PSCCH / PSSCH sensing window length is 100 ms, where n may be 7 if the PRS period is 640 ms.

[0197] This method not only meets the requirements of the PRS but also ensures the minimum possible monitoring which is beneficial for power consumption.

[0198] Case 2.1.2: Joint SL Sensing Window (Case 2)

[0199] Case 2: PRS and PSCCH / PSSCH adopt the same sensing window length upon trigger mode 2 resource selection.

[0200] Formula 1: Max{PSCCH / PSSCH period +X, PRS period +X}

[0201] Here, x must be at least greater than the procedure delay. If the PSCCH / PSSCH period is less than 99 ms, the window length is 100 ms, i.e., X is at least 1 ms.

[0202] For example, if the period of the PSCCH / PSSCH is less than 100 ms and the period of the PRS is 640 ms, the sensing window length adopted is the period of the PRS+x, which can be regarded as 640+X.

[0203] Equation 2: Max {PSCCH / PSSCH sensing window length, PRS independent sensing window length}

[0204] For example, if the sensing window length of PSCCH / PSSCH is 100 ms and the separate (resource pool) sensing window of PRS is 650 ms, then the sensing window length of PSSCH / PSCCH and PRS in Mode 2 resource selection should adopt Max{100,650}, i.e., the sensing window length is 650 ms.

[0205] Expression 3: One value in the set {P1,...,100,...,P2,...,1100,...,P3,...}

[0206] According to existing protocols, the currently configurable maximum cycle size of the PRS is taken into account. For example, if the PRS cycle is 10240 ms, P3 can be 10241 ms or any other value equal to or greater than 10240 ms.

[0207] In some embodiments, it may also be determined according to the current actual SL PRS period, for example, the maximum period of the actual transmitting SL PRS in the system is 2560 ms, the time domain size of the sensing window may be P2, and the value of P2 may be 2561 ms.

[0208] The main purpose of the time domain length of the resource selection window is to ensure that PRS and data occupancy and reservation can be monitored in the smallest selection window.

[0209] The disclosed technology may be implemented in some embodiments using the SCI_P to indicate the SL PRS and providing different structures for the SCI_P.

[0210] The disclosed techniques may be implemented in some embodiments to use different SCI_P methods to indicate different SL PRS on the frequency domain.

[0211] The disclosed techniques may be implemented in some embodiments to take into account the SL PRS and perform operations related to SL PRS Mode 2 resource allocation by monitoring the RSRP, sensing window and / or selection window.

[0212] The disclosed techniques can be implemented in some embodiments to perform operations related to Mode 2 resource allocation for SL PRS and SL PSCCH / PSSCH by taking into account the SL PRS and SL PSCCH / PSSCH and monitoring sensing and / or selection windows.

[0213] The disclosed techniques can be implemented in some embodiments to provide an SCI_P that indicates one SL PRS in a different resource pool on the frequency domain for efficient reception of PSCCH / PSSCH.

[0214] The disclosed techniques may be implemented in some embodiments to use partial sensing over the frequency domain for different resource pools.

[0215] FIG. 19 illustrates an example process for wireless communication in accordance with some exemplary embodiments of the disclosed technology.

[0216] In some implementations, a process 1900 for wireless communication may include, at 1910, performing, by the wireless devices, device-to-device communication according to one or more device-to-device positioning reference signals having a relationship with at least one of a set of resources, control information including at least one of device-to-device control information or device-to-device positioning control information, or device-to-device communication channels.

[0217] In some implementations, the one or more inter-device positioning reference signals may include a positioning reference signal (PRS), such as a sidelink positioning reference signal (SL PRS). In some implementations, the inter-device control information may include sidelink control information (e.g., SCI, SCI_P, SL SCI, SPCI, etc.).

[0218] FIG. 20 illustrates another example of a process for wireless communication in accordance with some exemplary embodiments of the disclosed technology.

[0219] In some embodiments, a process 2000 for wireless communication may include, at 2010, monitoring, by the wireless device, a device-to-device data communication sensing window, where the device-to-device sensing window includes at least one of the device-to-device data communication sensing window or an inter-device positioning reference signal sensing window having a relationship to the device-to-device data communication sensing window, and, at 2020, performing, by the wireless device, a reference signal sensing operation using the inter-device positioning reference signal sensing window.

[0220] It will be appreciated that the present specification discloses techniques that may be embodied in various embodiments for determining downlink control information in a wireless network. The disclosed and other embodiments, modules and functional operations described herein may be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed herein and their structural equivalents, or in one or more combinations thereof. The disclosed and other embodiments may be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer-readable medium for execution by or for controlling the operation of a data processing apparatus. The computer-readable medium may be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter that provides a machine-readable propagated signal, or one or more combinations thereof. The term "data processing apparatus" encompasses all apparatus, devices, and machines for processing data, including, by way of example, a programmable processor, a computer, or multiple processors or computers. An apparatus may include, in addition to hardware, code that creates an environment for the execution of the computer program in question, e.g., code that constitutes a processor firmware, a protocol stack, a database management system, an operating system, or one or more combinations thereof. A propagated signal is an artificially generated signal, such as a mechanically generated electrical, optical, or electromagnetic signal, that is generated to encode information for transmission to an appropriate receiving device.

[0221] A computer program (also known as a program, software, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and can be implemented in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can be stored in part of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program in question, or in multiple cooperating files (e.g., files that store one or more modules, subprograms, or portions of code). A computer program can be implemented to be executed on one computer, or on multiple computers located at one site, or on multiple computers distributed across multiple sites and interconnected by a communication network.

[0222] The processes and logic flows described herein may be performed by one or more programmable processors executing one or more computer programs to perform functions by manipulating input data to generate output. The processes and logic flows may also be performed by, and the apparatus may be implemented as, special purpose logic circuitry, such as, for example, an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit).

[0223] Processors suitable for executing computer programs include, by way of example, both general-purpose and special-purpose microprocessors, as well as any one or more processors of any kind of digital computer. Generally, a processor receives instructions and data from a read-only memory or a random-access memory or both. The essential elements of a computer are a processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer also includes one or more mass storage devices for storing data, such as magnetic, magneto-optical, or optical disks, and is operatively coupled to receive data from them, transfer data to them, or both. However, a computer need not have such devices. Computer-readable media suitable for storing computer program instructions and data include, by way of example, all forms of non-volatile memory, media, and memory devices, including semiconductor memory devices such as EPROM, EEPROM, and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks. The processor and memory may be supplemented by, or incorporated in, special-purpose logic circuitry.

[0224] Some embodiments may preferably implement one or more of the following solutions, which are listed in clause form. The following clauses are supported and further described in the above embodiments and throughout this specification. As used in the following clauses and claims, a wireless device may be a user equipment, a mobile station, or any other wireless terminal, including a fixed node such as a base station. A network device includes a base station, including a next-generation Node B (gNB), an enhanced Node B (eNB), or any other device that functions as a base station.

[0225] Item 1. A method of wireless communication, comprising: performing, by a wireless device, device-to-device communication according to one or more device-to-device positioning reference signals having a relationship with at least one of a set of resources, control information including at least one of device-to-device control information or device-to-device positioning control information, or device-to-device communication channels.

[0226] In some implementations, the one or more inter-device positioning reference signals may include a positioning reference signal (PRS), such as a sidelink positioning reference signal (SL PRS). In some implementations, the inter-device control information may include sidelink control information (e.g., SCI, SCI_P, SL SCI, SPCI, etc.).

[0227] Clause 2. The method described in clause 1, wherein the device-to-device control information includes at least one of sidelink control information (SCI) and device-to-device positioning control information, and the device-to-device positioning control information includes sidelink positioning control information (SPCI) indicating a positioning reference signal.

[0228] Clause 3. The method of any of clauses 1 and 2, wherein the one or more inter-device positioning reference signals having a relationship to the set of resources include a reference signal that is inside the set of sidelink resources.

[0229] Clause 4. The method of any of clauses 1 and 2, wherein the one or more inter-device positioning reference signals having an association with the set of resources include reference signals that cross a frequency domain boundary of the set of resources and at least partially overlap with the set of resources.

[0230] Clause 5. The method of any of clauses 1 and 2, wherein the one or more inter-device positioning reference signals having an association with the set of resources include reference signals that cross frequency domain boundaries of the set of resources and at least partially overlap with resources of two or more of the set of resources.

[0231] Clause 6. The method of any of clauses 1 and 2, wherein the one or more inter-device positioning reference signals having a relationship to the set of resources include a reference signal that is outside the set of sidelink resources.

[0232] Clause 7. The method of any one of clauses 1 to 6, wherein the one or more inter-device positioning reference signals having a relationship with the inter-device control information include one or more inter-device positioning reference signals indicated by the inter-device control information.

[0233] Clause 8. The method of clause 7, wherein inter-device positioning reference signals or control information are at least partially within the set of sidelink resources.

[0234] Clause 9. The method of clause 7, wherein inter-device positioning reference signals or control information are at least partially outside the set of sidelink resources.

[0235] Clause 10. The method of clause 1, wherein the control information includes a sidelink positioning control information (SPCI) segment indicating multiple positioning reference signals (PRS).

[0236] Clause 11. The method of clause 1, wherein the control information includes a plurality of SPCI segments indicating a PRS, each SPCI segment indicating a PRS.

[0237] Clause 12. The method of clause 11, wherein the SPCI segments are derived from different resource sets that include at least one of the sets of resources covered by the PRS.

[0238] Clause 13. The method of clause 1, wherein the control information includes multiple SPCI segments that indicate different portions of the PRS.

[0239] Clause 14. The method of clause 13, wherein the multiple SPCI segments are in different sets of resources, and each of the multiple SPCI segments indicates a portion of the PRS in the set of resources that the respective SPCI segment is on.

[0240] Item 15. The method of item 1, wherein the PRS is pre-configured without being indicated by the SCI.

[0241] Clause 16. The method of clause 1, wherein the one or more device-to-device positioning reference signals associated with the device-to-device communication channel include a sidelink reference signal configured on at least one of a physical sidelink control channel (PSCCH) or a physical sidelink shared channel (PSSCH).

[0242] Clause 17. The method of clause 16, wherein each PSCCH or PSSCH corresponds to at least one PRS.

[0243] Clause 18. The method of clause 16, wherein a plurality of PSCCHs or PSSCHs correspond to a PRS.

[0244] Clause 19. The method of clause 1, further comprising: receiving, by the wireless device, first information by performing a sensing operation; and performing, by the wireless device, at least one of PSCCH resource selection, PSSCH resource selection, or PRS resource selection.

[0245] Clause 20. The method of clause 19, wherein the first information includes at least one of an SPCI indicating a PRS, an SCI indicating a PRS, an SCI transmitted on a PSCCH to indicate a PSSCH, or a PRS.

[0246] Clause 21. The method of clause 19, wherein if the frequency domain range of the PRS is within the bandwidth of the set of resources, then both the SPCI and the PRS are located in the set of resources.

[0247] Clause 22. The method of clause 19, wherein the one or more inter-device positioning reference signals are associated with at least one of a PSCCH, a PSSCH, or the first information.

[0248] Clause 23. The method of clause 19, wherein at least one of a channel busy ratio (CBR), a channel occupancy ratio (CR), a high-level signaling indication, or measurement feedback is used to determine whether the first information indicates a PRS.

[0249] Clause 24. The method of any of clauses 21 to 23, wherein the PRS crosses a frequency domain boundary of the set of resources and at least partially overlaps with the set of resources.

[0250] Clause 25. The method of clause 19, wherein when a frequency domain range of the inter-device positioning reference signals exceeds the bandwidth of a single inter-device resource set, the one or more inter-device positioning reference signals are distributed between two or more inter-device resource sets and resources between adjacent inter-device resource sets.

[0251] Clause 26. The method of clause 19, wherein the SPCI for a PRS or a portion of a PRS can be out of a single inter-device resource set.

[0252] Clause 27. The method of clause 24, wherein the same number of SPCI segments are used for each resource pool.

[0253] Clause 28. The method of clause 24, wherein the PRS overlaps with the set of resources at multiple portions of the PRS, and an SPCI within each set of resources indicates the PRS, or each portion of the PRS that overlaps with the set of resources, respectively.

[0254] Clause 29. The method of any one of clauses 19 to 28, wherein the first information includes information associated with an uplink or downlink transmission or a sidelink transmission.

[0255] Clause 30. The method of any of clauses 19 to 28, wherein at least one of the first information or the one or more inter-device positioning reference signals is received or transmitted or transmitted over an unlicensed frequency band or a licensed band.

[0256] Clause 31. The method of clause 30, wherein the unlicensed frequency band includes an Intelligent Transportation System (ITS).

[0257] Clause 32. The method of any of clauses 1 to 31, wherein the frequency band of one or more inter-device positioning reference signals is obtained via at least one of pre-configuration, radio resource control (RRC) signaling, medium access control (MAC) control element (MAC CE), inter-device control information (SCI), or downlink control information (DCI).

[0258] Clause 33. The method of any one of clauses 19 to 32, wherein the first information further indicates a number of repetitions of at least one of the inter-device positioning reference signals.

[0259] Clause 34. The method according to any one of clauses 19 to 32, wherein the repeated transmission of the inter-device positioning reference signal is performed periodically, and the first information further indicates a transmission cycle of the repeated transmission of the inter-device positioning reference signal.

[0260] Clause 35. The method of clause 19, wherein performing at least one of PSCCH resource selection, PSSCH resource selection, or PRS resource selection includes measuring at least one of a reference signal received power (RSRP) of the PRS signal, the RSRP of the SPCI, the RSRP of the PSSCH, or the PSRP of the PSCCH when monitoring a sensing window for resource selection.

[0261] Clause 36. The method of clause 35, wherein the sensing window includes a time domain window, and the length of the time domain window is determined by dividing a set of periods of the PRS into a plurality of set values ​​and selecting one of the plurality of values ​​as the length of the time domain window.

[0262] Clause 37. The method of clause 35, wherein the sensing window includes a frequency domain window including a portion of a frequency band occupied by a currently transmitted device-to-device positioning reference signal or a frequency band range with interference higher than a predetermined threshold, or the frequency band includes at least one of an SCI or an SPCI.

[0263] Clause 38. The method of clause 37, wherein when a dedicated resource domain or unlicensed spectrum is used, the frequency band of the SPCI is outside the frequency range of the transmission of the PRS or the set of sidelink resources, and the PRS is acquired according to at least one of the SCI or the SPCI by performing a sensing operation.

[0264] Clause 39. The method of clause 19, further comprising: selecting device-to-device communication resources from a device-to-device resource domain within a resource selection window; and performing device-to-device data communication based on the selected resources, wherein a time domain length of the resource selection window does not exceed at least a delay or periodicity, or a delay and periodicity, of a periodic transmission indicated by at least one of a preconfiguration, a radio resource control (RRC) signaling, a medium access control (MAC) control element (MAC CE), device-to-device control information (SCI), or a downlink control information (DCI).

[0265] Clause 40. The method of clause 39, wherein the resource includes at least one of a physical sidelink control channel (PSCCH) or a physical sidelink shared channel (PSSCH), or a PRS, an SPCI, or an SCI indicating a PRS.

[0266] Clause 41. A method of wireless communication comprising: monitoring, by a wireless device, an inter-device sensing window, wherein the inter-device sensing window includes at least one of an inter-device data communication sensing window or an inter-device positioning reference signal sensing window having a certain relationship with the inter-device data communication sensing window; and performing, by the wireless device, a reference signal sensing operation using the inter-device positioning reference signal sensing window.

[0267] Clause 42. The method of clause 41, wherein a time domain length of an inter-device positioning reference signal sensing window is greater than a time domain length of an inter-device data communication sensing window.

[0268] Clause 43. The method of clause 41, wherein the inter-device positioning reference signal sensing window in the frequency domain covers at least one inter-device data communication sensing window.

[0269] Clause 44. The method of any one of clauses 41 to 43, wherein the inter-device positioning reference signal sensing window includes a sensing window for a PRS, and the inter-device data communication sensing window includes a sensing window for a PSCCH or a PSSCH.

[0270] Clause 45. The method of clause 44, wherein at least one of the device-to-device data communication sensing window or the device-to-device positioning reference signal sensing window is determined based on at least one of a high level indication, a pre-configuration, a PC5, an RRC, a MAC CE, a dynamic indication, an explicit indication, or an implicit indication.

[0271] Clause 46. The method of clause 41, wherein the length of the inter-device positioning reference signal sensing window is obtained by multiplying the length of the inter-device data communication sensing window by N, where N is a positive number configured according to a predetermined cycle of the inter-device positioning reference signal sensing window.

[0272] Clause 47. The method of clause 41, wherein a time domain length of the inter-device positioning reference signal sensing window is equal to a time domain length of the inter-device data communication sensing window.

[0273] Clause 48. The method of clause 47, wherein the time domain length of the inter-device data communication sensing window is varied after accounting for the influence of inter-device positioning reference signals.

[0274] Clause 49. The method of clause 44, wherein a separate PRS sensing window is used as an inter-device positioning reference signal sensing window when selecting resources based on a PRS.

[0275] Clause 50. The method of clause 44, wherein a separate PSSCH sensing window is used as a device-to-device data communication sensing window when selecting resources based on the PSSCH.

[0276] Clause 51. The method of clause 44, wherein a single sensing window is used as the inter-device positioning reference signal sensing window and the inter-device data communication sensing window when selecting resources based on both the PRS and the PSSCH.

[0277] Clause 52. The method of clause 51, wherein the single sensing window used as the inter-device positioning reference signal sensing window has the same time-frequency domain length as the single sensing window used as the inter-device data communication sensing window.

[0278] Clause 53. The method of any of clauses 49 to 52, wherein the time domain length of the PRS sensing window is a time domain window length determined by a PRS cycle based only on resource selection of the PRS, or a time domain window length determined by a PRS cycle when PRS and PSSCH resources are selected simultaneously.

[0279] Clause 54. The method of any of clauses 49 to 52, wherein the time domain window length of the PSSCH sensing window is a time domain window length determined based only on the window length of the PSSCH resource selection or based on both the sensing window length of the PRS and the sensing window length of the PSSCH.

[0280] Clause 55. An apparatus for wireless communication comprising a processor configured to perform the method according to any one of clauses 1 to 54.

[0281] Clause 56. A non-transitory computer readable medium having code stored thereon, the code, when executed by a processor, causing the processor to perform a method according to any one of clauses 1 to 54.

[0282] Some of the embodiments described herein are described in the general context of a method or process that may be implemented in one embodiment by a computer program product embodied in a computer-readable medium that includes computer-executable instructions, such as program code, executed by a computer in a network environment. The computer-readable medium may include removable and non-removable storage devices, including, but not limited to, read-only memory (ROM), random access memory (RAM), compact disks (CDs), digital versatile disks (DVDs), and the like. Thus, the computer-readable medium may include non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, and the like that perform particular tasks or implement particular abstract data types. Computer or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. A particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.

[0283] Some of the disclosed embodiments may be implemented as devices or modules using hardware circuits, software, or a combination thereof. For example, hardware circuit implementations may include separate analog and / or digital components integrated, for example, as part of a printed circuit board. In some implementations, or in addition, the disclosed components or modules may be implemented as application specific integrated circuits (ASICs) and / or field programmable gate array (FPGA) devices. Some implementations may also include a digital signal processor (DSP), which is a dedicated microprocessor having an architecture optimized for the operational needs of digital signal processing related to the disclosed functionality of this application. Similarly, the various components or subcomponents within each module may be implemented in software, hardware, or firmware. Connections between modules and / or components within a module may be provided using any one of the connection methods and mediums known in the art, including, but not limited to, communication via the Internet, wired, or wireless networks using appropriate protocols.

[0284] While this document contains many details, these should not be construed as limitations on the scope of the claimed invention or the invention that may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features described herein in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable subcombination. Furthermore, although features may be described above as acting in a particular combination and initially claimed as such, one or more features from a claimed combination may, in some cases, be cut out of the combination, and the claimed combination may be directed to a subcombination or a variation of the subcombination. Similarly, although each operation is shown in the figures in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown, or in the sequential order, or that all of the operations shown be performed, to achieve desirable results.

[0285] Based on what has been described and illustrated in this disclosure, only some implementations and examples have been described, and other implementations, enhancements and variations may be made.

Claims

1. 1. A method of wireless communication, comprising: and performing, by the wireless devices, inter-device communication according to one or more inter-device positioning reference signals having a relationship with at least one of a set of resources, control information including at least one of inter-device control information or inter-device positioning control information, or an inter-device communication channel. A method comprising:

2. 2. The method of claim 1, wherein the inter-device control information includes at least one of sidelink control information (SCI) and the inter-device positioning control information, the inter-device positioning control information including sidelink positioning control information (SPCI) indicating a positioning reference signal.

3. 3. The method of claim 1, wherein the one or more inter-device positioning reference signals having the relationship with the set of resources include a reference signal that is inside a set of sidelink resources.

4. 3. The method of claim 1, wherein the one or more inter-device positioning reference signals having the relationship with the set of resources include reference signals that cross a frequency domain boundary of the set of resources and at least partially overlap with the set of resources.

5. 3. The method of claim 1, wherein the one or more inter-device positioning reference signals having the relationship with the set of resources include reference signals that cross a frequency domain boundary of the set of resources and at least partially overlap with resources of two or more sets of resources.

6. 3. The method of claim 1, wherein the one or more inter-device positioning reference signals having the relationship with the set of resources include a reference signal that is outside a set of sidelink resources.

7. The method of claim 1 , wherein the one or more inter-device positioning reference signals having the relationship with the inter-device control information include one or more inter-device positioning reference signals indicated by the inter-device control information.

8. 8. The method of claim 7, wherein the inter-device positioning reference signal or the control information is at least partially inside a set of sidelink resources.

9. 8. The method of claim 7, wherein the inter-device positioning reference signal or the control information is at least partially outside a set of sidelink resources.

10. 2. The method of claim 1, wherein the control information comprises a sidelink positioning control information (SPCI) segment indicating a plurality of positioning reference signals (PRS).

11. The method of claim 1 , wherein the control information includes a plurality of SPCI segments indicating a PRS, each SPCI segment indicating the PRS.

12. The method of claim 11 , wherein the SPCI segments are from different resource sets including at least one of the sets of resources covered by the PRS.

13. The method of claim 1 , wherein the control information includes the plurality of SPCI segments that indicate different portions of the PRS.

14. 14. The method of claim 13, wherein the plurality of SPCI segments are in different sets of resources, each of the plurality of SPCI segments indicating a portion of the PRS in the set of resources that each SPCI segment is on.

15. The method of claim 1 , wherein the PRS is pre-configured without being indicated by an SCI.

16. 2. The method of claim 1, wherein the one or more device-to-device positioning reference signals having the relationship with the device-to-device communication channel include a sidelink reference signal configured on at least one of a Physical Sidelink Control Channel (PSCCH) or a Physical Sidelink Shared Channel (PSSCH).

17. 17. The method of claim 16, wherein each PSCCH or PSSCH corresponds to at least one PRS.

18. 17. The method of claim 16, wherein the plurality of PSCCHs or PSSCHs correspond to PRSs.

19. receiving, by the wireless device, first information by performing a sensing operation; performing, by the wireless device, at least one of a PSCCH resource selection, a PSSCH resource selection, or a PRS resource selection; The method of claim 1 further comprising:

20. 20. The method of claim 19, wherein the first information includes at least one of a SPCI indicating a PRS, a SCI indicating a PRS, a SCI transmitted on a PSCCH to indicate a PSSCH, or a PRS.

21. 20. The method of claim 19, wherein if a frequency domain range of a PRS is within a bandwidth of the set of resources, then both a SPCI and a PRS are located in the set of resources.

22. 20. The method of claim 19, wherein the one or more inter-device positioning reference signals are associated with at least one of a PSCCH, a PSSCH, or the first information.

23. 20. The method of claim 19, wherein at least one of a channel busy ratio (CBR), a channel occupancy ratio (CR), a high level signaling indication, or measurement feedback is used to determine whether the first information indicates a PRS.

24. 24. The method of claim 21, wherein the PRS crosses a frequency domain boundary of the set of resources and at least partially overlaps with the set of resources.

25. 20. The method of claim 19, wherein if a frequency domain range of an inter-device positioning reference signal exceeds a bandwidth of a single inter-device resource set, the one or more inter-device positioning reference signals are distributed between two or more inter-device resource sets and resources between adjacent inter-device resource sets.

26. 20. The method of claim 19, wherein the SPCI for a PRS or a portion of the PRS can be out of a single inter-device resource set.

27. 25. The method of claim 24, wherein the same number of SPCI segments are used for each resource pool.

28. 25. The method of claim 24, wherein the PRS overlaps with the set of resources in multiple portions of the PRS, and a SPCI within each set of resources indicates the PRS or each portion of the PRS that overlaps with the set of resources, respectively.

29. 29. The method of claim 19, wherein the first information comprises information associated with an uplink or downlink transmission or a sidelink transmission.

30. 29. The method of any of claims 19 to 28, wherein at least one of the first information or the one or more inter-device positioning reference signals is received or transmitted or transmitted over an unlicensed or licensed frequency band.

31. 31. The method of claim 30, wherein the unlicensed frequency band comprises an Intelligent Transportation System (ITS).

32. 32. The method of claim 1, wherein the frequency bands of the one or more inter-device positioning reference signals are obtained via at least one of pre-configuration, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) Control Element (MAC CE), inter-device control information (SCI), or downlink control information (DCI).

33. 33. The method of claim 19, wherein the first information further indicates a number of repetitions of at least one of the inter-device positioning reference signals.

34. The method according to claim 19 , wherein the repeated transmission of the inter-device positioning reference signal is performed periodically, and the first information further indicates a transmission cycle of the repeated transmission of the inter-device positioning reference signal.

35. 20. The method of claim 19, wherein performing at least one of PSCCH resource selection, PSSCH resource selection, or PRS resource selection includes measuring at least one of a Reference Signal Received Power (RSRP) of the PRS signal, an RSRP of a SPCI, an RSRP of a PSSCH, or a PSRP of a PSCCH when monitoring a sensing window for the resource selection.

36. 36. The method of claim 35, wherein the sensing window comprises a time domain window, a length of the time domain window being determined by dividing a set of periods of the PRS into a plurality of set values ​​and selecting one of the plurality of values ​​as the length of the time domain window.

37. 36. The method of claim 35, wherein the sensing window comprises a frequency domain window including a frequency band occupied by currently transmitted device-to-device positioning reference signals or a portion of a frequency band range with interference higher than a predetermined threshold, or the frequency band includes at least one of SCI or SPCI.

38. 38. The method of claim 37, wherein if a dedicated resource domain or an unlicensed spectrum is used, the frequency band of an SPCI is outside the frequency range of transmission of a PRS or a set of sidelink resources, and a PRS is acquired according to at least one of an SCI or an SPCI by performing a sensing operation.

39. selecting an inter-device communication resource from an inter-device resource domain in a resource selection window; performing inter-device data communication based on the selected resources; and Further comprising: a time domain length of the resource selection window does not exceed at least a delay or period, or the delay and the period, of a periodic transmission indicated by at least one of pre-configuration, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) Control Element (MAC CE), Device-to-Device Control Information (SCI), or Downlink Control Information (DCI); 20. The method of claim 19.

40. 40. The method of claim 39, wherein the resources include at least one of a physical sidelink control channel (PSCCH) or a physical sidelink shared channel (PSSCH), or a PRS, a SPCI, or an SCI indicating a PRS.

41. 1. A method of wireless communication, comprising: monitoring, by a wireless device, an inter-device sensing window, the inter-device sensing window including at least one of an inter-device data communication sensing window or an inter-device positioning reference signal sensing window having a relationship with the inter-device data communication sensing window; performing, by the wireless device, a reference signal sensing operation using the inter-device positioning reference signal sensing window; A method comprising:

42. 42. The method of claim 41, wherein a time domain length of the inter-device positioning reference signal sensing window is greater than a time domain length of the inter-device data communication sensing window.

43. 42. The method of claim 41, wherein the inter-device positioning reference signal sensing window in the frequency domain covers at least one inter-device data communication sensing window.

44. 44. The method of claim 41, wherein the inter-device positioning reference signal sensing window comprises a sensing window for a PRS, and the inter-device data communication sensing window comprises a sensing window for a PSCCH or a PSSCH.

45. 45. The method of claim 44, wherein at least one of the inter-device data communication sensing window or the inter-device positioning reference signal sensing window is determined based on at least one of a high level indication, a pre-configuration, a PC5, an RRC, a MAC CE, a dynamic indication, an explicit indication, or an implicit indication.

46. 42. The method of claim 41 , wherein the length of the inter-device positioning reference signal sensing window is obtained by multiplying the length of the inter-device data communication sensing window by N, where N is a positive number configured according to a predetermined cycle of the inter-device positioning reference signal sensing window.

47. 42. The method of claim 41, wherein a time domain length of the inter-device positioning reference signal sensing window is equal to a time domain length of the inter-device data communication sensing window.

48. 48. The method of claim 47, wherein the time domain length of the device-to-device data communication sensing window varies after accounting for an effect of the device-to-device positioning reference signal.

49. 45. The method of claim 44, wherein when selecting resources based on the PRS, a separate PRS sensing window is used as the inter-device positioning reference signal sensing window.

50. 45. The method of claim 44, wherein when selecting resources based on the PSSCH, a separate PSSCH sensing window is used as the device-to-device data communication sensing window.

51. 45. The method of claim 44, wherein when selecting resources based on both the PRS and the PSSCH, a single sensing window is used as the inter-device positioning reference signal sensing window and the inter-device data communication sensing window.

52. 52. The method of claim 51, wherein the single sensing window used as the inter-device positioning reference signal sensing window has the same time-frequency domain length as the single sensing window used as the inter-device data communication sensing window.

53. 53. The method of claim 49, wherein the time-domain length of the PRS sensing window is a time-domain window length determined by a PRS cycle based only on resource selection for the PRS or a time-domain window length determined by a PRS cycle when the PRS and PSSCH resources are selected simultaneously.

54. 53. The method of claim 49, wherein the time domain window length of the PSSCH sensing window is a time domain window length determined based on a PSSCH resource selection window length only or based on both a sensing window length of the PRS and a sensing window length of the PSSCH.

55. 55. An apparatus for wireless communication comprising a processor configured to perform a method according to any preceding claim.

56. 55. A non-transitory computer readable medium having code stored thereon, the code, when executed by a processor, causing the processor to perform a method according to any of claims 1 to 54.

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