CN117880989A - Method and user equipment for supporting AGC symbols for SL-PRS reception - Google Patents

Abstract

The present invention provides a method and a user equipment for supporting AGC symbols for SL-PRS reception, wherein the method comprises: receiving, by a processor of a receiving user equipment, a first configuration for side link positioning reference signal, SL-PRS, resources; receiving, by the processor, an automatic gain control, AGC, symbol for the SL-PRS resource; and receiving, by the processor, the SL-PRS resources based on the first configuration, wherein an RS in the AGC symbol corresponds to a same set of subcarriers as a SL-PRS in a last SL-PRS symbol of the SL-PRS resources, the set of subcarriers including one or more subcarriers. By utilizing the invention, AGC symbols for SL-PRS reception can be better supported.

Description

Method and user equipment for supporting AGC symbols for SL-PRS reception

Technical Field

The present invention relates generally to mobile communications, and more particularly to supporting automatic gain control (automatic gain control, AGC) symbols for side link positioning reference signal (SL-PRS) reception in mobile communications.

Background

Unless otherwise indicated, the approaches described in this section are not prior art to the claims in the claims listed below and are not admitted to be prior art by inclusion in this section.

In the 5G New Radio (NR), SL-PRS is a Reference Signal (RS) used in SL transmission between User Equipments (UEs) for a receiving (Rx) UE to determine relative position information with respect to a transmitting (Tx) UE. SL signal transmissions in a slot typically include AGC symbols in front to facilitate reception of the SL signal by the Rx UE. Under the current SL framework, SL transmissions in one slot may transition to reception in the next slot, such that Tx-Rx turnaround time (turn around time) may be required for the SL positioning.

In the third generation partnership project (3rd generation partnership project,3GPP) release 17, physical channel transmission in SL communication supports AGC symbols, with the general rule that a first orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol of a physical channel is repeated in an immediately preceding OFDM symbol of the physical channel. However, the details of introducing AGC symbols for SL-PRS have not been fully discussed and some problems have yet to be resolved. One of the problems relates to which content needs to be included in the AGC symbol. Another problem relates to the interleaving structure (staggering structure) for the SL-PRS pattern where the AGC symbols should be allocated. Accordingly, there is a need to provide an appropriate scheme to support AGC symbols for SL-PRS reception.

Disclosure of Invention

The following summary is illustrative only and is not intended to be in any way limiting. That is, the following summary is provided to introduce a selection of concepts, elements, benefits and advantages of the novel and non-obvious techniques described herein. Selected embodiments are further described in the detailed description below. Accordingly, the following summary is not intended to identify essential features of the claimed subject matter, nor is it intended to be used to determine the scope of the claimed subject matter.

The present invention aims to solve the above-mentioned problems related to supporting AGC symbols for SL-PRS reception in mobile communications, and to propose a solution.

An embodiment of the present invention provides a method for supporting AGC symbols for SL-PRS reception, comprising: receiving, by a processor of a receiving user equipment, a first configuration for side link positioning reference signal, SL-PRS, resources; receiving, by the processor, an automatic gain control, AGC, symbol for the SL-PRS resource; and receiving, by the processor, the SL-PRS resources based on the first configuration, wherein an RS in the AGC symbol corresponds to a same set of subcarriers as a SL-PRS in a last SL-PRS symbol of the SL-PRS resources, the set of subcarriers including one or more subcarriers.

An embodiment of the present invention provides a method for supporting AGC symbols for SL-PRS reception, comprising: transmitting, by a processor of a transmitting user equipment, a first configuration for SL-PRS resources; transmitting, by the processor, an AGC symbol for SL-PRS resources; and transmitting, by the processor, the SL-PRS resources based on the first configuration, wherein RSs in the AGC symbol and SL-PRSs in a last SL-PRS symbol of the SL-PRS resources correspond to a same set of subcarriers, the set of subcarriers including one or more subcarriers.

An embodiment of the present invention provides a user equipment, including: a transceiver in wireless communication with at least one transmitting user equipment during operation; and a processor communicatively coupled to the transceiver such that during operation, the processor performs the following: receiving, via the transceiver, a first configuration for SL-PRS resources; receiving an AGC symbol for the SL-PRS resource via the transceiver; and receiving, via the transceiver, the SL-PRS resources based on the first configuration, wherein an RS in the AGC symbol corresponds to a same set of subcarriers as a SL-PRS in a last SL-PRS symbol of the SL-PRS resources, the set of subcarriers including one or more subcarriers.

Note that while the description context provided by the present invention may be some specific radio access technologies, networks and network topologies, such as long-term evolution (LTE), LTE-advanced Pro, 5G, NR, internet of things (IoT), narrowband Internet of things (narrow band Internet of things, NB-IoT), industrial Internet of things (industrial Internet of things, IIoT), and 6G, the proposed concepts, schemes, and any variations/derivatives thereof may be implemented in, for, or through any other type of radio access technology, network, and network topology. Accordingly, the scope of the invention is not limited to the examples described herein.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It will be appreciated that for clarity of illustration of the concepts of the invention, the drawings are not necessarily to scale, and that some of the components shown may be shown in an out of scale dimension from the actual implementation.

FIG. 1 is a schematic diagram of an exemplary scenario of an NR SL frame according to an embodiment of the invention.

Fig. 2 is a schematic diagram of an exemplary scenario for configuring AGC symbols and SL-PRS resources according to an embodiment of the present invention.

Fig. 3 is a diagram of an exemplary scenario in which AGC symbols are allocated prior to SL-PRS resources according to an embodiment of the present invention.

Fig. 4 is a diagram of an exemplary scenario in which AGC symbols are allocated prior to SL-PRS resources according to an embodiment of the present invention.

Fig. 5 is a diagram of an exemplary scenario in which AGC symbols are allocated prior to SL-PRS resources according to an embodiment of the present invention.

Fig. 6 is a diagram of an exemplary scenario in which AGC symbols are allocated prior to SL-PRS resources according to an embodiment of the present invention.

Fig. 7 is a block diagram of an exemplary communication system according to an embodiment of the present invention.

Fig. 8 is a flowchart of an exemplary process according to an embodiment of the present invention.

Fig. 9 is a flowchart of an exemplary process according to an embodiment of the present invention.

Detailed Description

Detailed examples and implementations of the claimed subject matter are disclosed. It is to be understood, however, that the disclosed examples and implementations are merely illustrative of the claimed subject matter, which may be embodied in various forms. Moreover, the present invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments and implementations set forth herein. Rather, these exemplary embodiments and implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the following description, details of known features and techniques may be omitted to avoid unnecessarily obscuring the presented embodiments and implementations.

SUMMARY

Embodiments of the present invention relate to various techniques, methods, schemes and/or solutions related to supporting AGC symbols for SL-PRS reception in mobile communications. According to the invention, a plurality of possible solutions can be implemented singly or in combination. That is, although these possible solutions may be described separately below, two or more of these possible solutions may be implemented in a combination or other combination.

FIG. 1 is a schematic diagram of an exemplary scenario 100 of an NR SL frame according to an embodiment of the invention. Scenario 100 involves a Tx UE and multiple Rx UEs, which may be part of a wireless communication network (e.g., an LTE network, a 5G/NR network, an IoT network, or a 6G network). Scenario 100 depicts a current NR SL (i.e., NR vehicle-to-monitoring (V2X)) framework. The Tx UE may communicate with the Rx UE. The Tx UE may send SL-PRS to the Rx UE. Each Rx UE may measure the corresponding SL-PRS and report the calculation results to the computing entity.

Fig. 2 is a schematic diagram of an exemplary scenario 200 of configuring AGC symbols and SL-PRS resources according to an embodiment of the present invention. Scenario 200 involves a Tx UE and multiple Rx UEs, which may be part of a wireless communication network (e.g., an LTE network, a 5G/NR network, an IoT network, or a 6G network). To support the reception of SL-PRS by the Rx UE, the Tx UE may send SL-PRS configuration and AGC symbols to the Rx UE. Among other things, the SL-PRS configuration may be transmitted over a physical side link control channel (physical sidelink control channel, PSCCH) and a physical side link shared channel (physical sidelink shared channel, PSSCH). Accordingly, the Rx UE may perform AGC tuning (adjustment) based on the AGC symbols and perform measurements for SL positioning based on SL-PRS resources.

Note that if the RS in the AGC symbol is the same set of subcarriers occupied by the RS in the last SL-PRS symbol, the Rx UE may be allowed to further perform frequency offset estimation to estimate the relative speed between itself and the Tx UE. This is because the PSCCH scheduling the SL-PRS also has corresponding AGC symbols, i.e. the Rx UE can use the AGC symbols of the PSCCH for gain adjustment to receive the PSCCH as well as the SL-PRS. The Rx UE may also measure the gains on the AGC symbols of the PSCCH and SL-PRS, respectively, to identify gain differences. Thus, in the next receive time instance (time instance), the Rx UE sometimes does not need to perform receive gain adjustment using AGC symbols for SL-PRS. If the Rx UE decides not to use the AGC symbol for SL-PRS to perform receive gain adjustment, the AGC symbol can still be used with the last SL-PRS symbol for relative velocity estimation. The phase difference between RSs in two different OFDM symbols may be used to acquire the frequency offset. Since the channel response may have different phases on different subcarriers, the phase difference between RSs in different OFDM symbols but on the same subcarrier is not severely affected by the channel.

More specifically, if there is 1 AGC symbol immediately before the SL-PRS resource (i.e., for AGC symbol allocation, 1 OFDM symbol length in the time domain and multiple subcarriers in the frequency domain), the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resource correspond to the same set of subcarriers, i.e., the AGC symbol and the last SL-PRS symbol are associated with the same Resource Element (RE) offset (or frequency offset). Alternatively, if two AGC symbols immediately preceding the SL-PRS resources (i.e., two OFDM symbol lengths in the time domain and multiple subcarriers in the frequency domain for AGC symbol allocation), the AGC symbols correspond to the same set of subcarriers as the last two SL-PRS symbols in the SL-PRS resources, i.e., the AGC symbols and the last two SL-PRS symbols are associated with the same RE offset (or referred to as frequency offset).

In some implementations, each AGC symbol can include SL-PRS. Additionally or alternatively, the SL-PRS may include a sequence that is initialized based on a symbol index of the AGC symbol in the slot. For example, the sequence may be denoted as r (m), defined as:

wherein the pseudo-random sequence c (i) is defined in the 3GPP standard. The pseudo-random sequence generator may be initialized by the following formula:

wherein the method comprises the steps ofIs the slot number in the radio frame; l is the OFDM symbol within the slot to which the sequence maps;is the SL PRS sequence ID.

Specifically, the AGC symbols for SL-PRS have an associated OFDM symbol index to generate a sequence. Accordingly, since the initialization seed is controlled by the OFDM symbol index, the sequence generated for the AGC symbol will be different from the sequence generated for the SL-PRS symbol for the SL-PRS resource.

In some embodiments, the RS in the AGC symbol and the SL-PRS in the SL-PRS symbol of the SL-PRS resource may be transmitted/received through the same spatial filter.

In some embodiments, the RS in the AGC symbol and the SL-PRS in the SL-PRS symbol of the SL-PRS resource may be quasi co-located (QCLED).

In some implementations, the AGC symbols can be disabled by another configuration received from a wireless communication network (e.g., an LTE network, a 5G/NR network, an IoT network, or a 6G network). For example, by default, the AGC symbol for SL-PRS is enabled, while if the configuration described above is received, the AGC symbol for SL-PRS is disabled. The above configuration may be received through higher layer messages carried by the PSSCH.

In some implementations, the OFDM symbol following the last SL-PRS symbol may serve as a guard symbol for Tx-Rx turnarounds.

Fig. 3 is a diagram of an exemplary scenario 300 of allocating AGC symbols prior to SL-PRS resources according to an embodiment of the present invention. Scenario 300 shows that the SL-PRS resources have a comb (comb) size of 4 and 4 OFDM symbol lengths, while the AGC symbols have a 1 OFDM symbol length. The SL-PRS symbols are arranged in a fully interleaved structure according to RE offset of the SL-PRS symbols. In an example, the RE offset value may be given by 7.4.1.7.3 of 3GPP TS 38.211, where the RE offset for SL-PRS symbols is {0,2,1,3,0,2,1,3,0,2,1,3,0,2,1,3} from symbol number 0 to symbol number 11 if the comb size is 4. As shown in fig. 3, the AGC symbol has a RE offset=3, which is the same as the RE offset of the last SL-PRS symbol (i.e., the SL-PRS symbol with symbol number=3). That is, the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol occupy the same set of subcarriers.

Fig. 4 is a diagram of an exemplary scenario 400 of allocating AGC symbols prior to SL-PRS resources according to an embodiment of the present invention. Scenario 400 shows that the SL-PRS resources have a comb size of 4 and 2 OFDM symbol lengths, while the AGC symbols have a length of 1 OFDM symbol. Similar to scenario 300 in FIG. 3, SL-PRS symbols in scenario 400 are arranged with the same RE offset pattern. As shown in fig. 4, the AGC symbol has a RE offset=2, which is the same as the RE offset of the last SL-PRS symbol (i.e., the SL-PRS symbol with symbol number=1). That is, the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol occupy the same set of subcarriers.

Fig. 5 is a diagram of an exemplary scenario 500 of AGC symbol allocation prior to SL-PRS resources according to an embodiment of the present invention. Scenario 500 shows that the SL-PRS resources have a comb size of 4 and 4 OFDM symbol lengths, while the AGC symbols have a length of 2 OFDM symbols. Similar to scenario 300 in FIG. 3, SL-PRS symbols in scenario 500 are arranged with the same RE offset pattern. As shown in fig. 5, the first AGC symbol has a RE offset=1, which is the same as the RE offset of the second to last SL-PRS symbol (i.e., the SL-PRS symbol with symbol number=2); the second AGC symbol has a RE offset=3, which is the same as the RE offset of the last SL-PRS symbol (i.e., the SL-PRS symbol with symbol number=3). That is, the RS in the AGC symbol and the SL-PRS in the last two SL-PRS symbols occupy the same set of subcarriers.

Fig. 6 is a diagram of an exemplary scenario 600 of AGC symbol allocation prior to SL-PRS resources according to an embodiment of the present invention. Scenario 600 shows that the SL-PRS resources have a comb size of 4 and 2 symbols in length, while the AGC symbols have a length of 2 symbols. Similar to scenario 300 in FIG. 3, SL-PRS symbols in scenario 600 are arranged with the same RE offset pattern. As shown in fig. 6, the first AGC symbol has a RE offset=0, which is the same as the RE offset of the second to last SL-PRS symbol (i.e., the SL-PRS symbol with symbol number=0); the second AGC symbol has a RE offset=2, which is the same as the RE offset of the last SL-PRS symbol (i.e. the SL-PRS symbol with symbol number=1). That is, the RS in the AGC symbol and the SL-PRS in the last two SL-PRS symbols occupy the same set of subcarriers.

Illustrative embodiments

Fig. 7 is a schematic diagram of an exemplary communication system 700 including an exemplary Tx UE 710 and an exemplary Rx UE 720 in accordance with an embodiment of the present invention. Each of the Tx UE 710 and the Rx UE 720 may perform various functions to implement the schemes, techniques, procedures, and methods described herein with respect to supporting AGC symbols for SL-PRS reception in mobile communications, including the scenarios/schemes described above and the procedures 800 and 900 described below.

The Tx UE 710 may be part of an electronic device, such as a portable or mobile device, a wearable device, a wireless communication device, or a computing device, among others. For example, the Tx UE 710 may be implemented in a smart phone, a smart watch, a personal digital assistant, a digital camera, or a computing device such as a tablet, laptop, or notebook. The Tx UE 710 may also be part of a machine type device, which may be an IoT, NB-IoT or IIoT device, such as a fixed or static device, a home device, a wired communication device or a computing device. For example, the Tx UE 710 may be implemented in a smart thermostat, a smart refrigerator, a smart door lock, a wireless speaker, or a home control center. Alternatively, the Tx UE 710 may be implemented in the form of one or more integrated circuit (Integrated circuit, IC) chips, such as, but not limited to, one or more single core processors, one or more multi-core processors, one or more reduced-Instruction-Set-Computing (RISC) processors, or one or more Complex Instruction-Set-Computing (CISC) processors. The Tx UE 710 may include at least a portion of the components shown in fig. 7, such as the processor 712 in fig. 7. The Tx UE 710 may further include one or more other components (e.g., internal power supplies, display devices, and/or user interface devices) that are not relevant to the proposed solution of the present invention. But for simplicity and brevity, these components in the Tx UE 710 are not depicted in fig. 7, nor described below.

The Rx UE 720 may be part of an electronic device, such as a portable or mobile device, a wearable device, a wireless communication device, or a computing device, among others. For example, the Rx UE 720 may be implemented in a smart phone, a smart watch, a personal digital assistant, a digital camera, or a computing device such as a tablet, laptop, or notebook. The Tx UE 710 may also be part of a machine type device, which may be an IoT, NB-IoT or IIoT device, such as a fixed or static device, a home device, a wired communication device or a computing device. For example, the Rx UE 720 may be implemented in a smart thermostat, a smart refrigerator, a smart door lock, a wireless speaker, or a home control center. Alternatively, the Rx UE 720 may be implemented in the form of one or more integrated circuit IC chips, such as, but not limited to, one or more single-core processors, one or more multi-core processors, one or more reduced instruction set computing RISC processors, or one or more complex instruction set computing CISC processors. The Rx UE 720 may include at least a portion of the components shown in fig. 7, such as the processor 722 in fig. 7. The Rx UE 720 may further include one or more other components (e.g., internal power supplies, display devices, and/or user interface devices) that are not relevant to the proposed solution of the present invention. But for simplicity and brevity these components in the Rx UE 720 are not depicted in fig. 7 nor described below.

Note that in some embodiments, tx UE 710 may have the functionality of and operate as an Rx UE, while Rx UE 720 may have the functionality of and operate as a Tx UE.

In an aspect, each of processor 712 and processor 722 may be implemented in the form of one or more single-core processors, one or more multi-core processors, or one or more CISC processors. That is, even though the present invention uses "processors" to refer to the processor 712 and the processor 722, each of the processor 712 and the processor 722 may include multiple processors in some embodiments and a single processor in other embodiments according to the present invention. On the other hand, each of the processor 712 and the processor 722 may be implemented in hardware (and optionally firmware) having electronic components including, but not limited to, one or more transistors, one or more diodes, one or more capacitors, one or more resistors, one or more inductors, one or more memristors, and/or one or more varactors configured and arranged to achieve a particular purpose in accordance with the present invention. In other words, in at least some implementations, each of the processor 712 and the processor 722 may be dedicated machines specifically designed, configured, and arranged to perform specific tasks in a UE (as shown by Tx UE 710) and another UE (as shown by Rx UE 720) including supporting AGC symbols for SL-PRS reception in mobile communications according to various embodiments of the present invention.

In some embodiments, the Tx UE 710 may further include a transceiver 716 coupled to the processor 712, the transceiver 716 being capable of wirelessly transmitting and receiving data. In some implementations, the Tx UE 710 may further include a memory 714 coupled to the processor 712, which stores data and is accessible to the processor 712. In some embodiments, the Rx UE 720 may further include a transceiver 726 coupled to the processor 722, the transceiver 726 being capable of wirelessly transmitting and receiving data. In some embodiments, the Rx UE 720 may further include a memory 724 coupled to the processor 722, which stores data and is accessible by the processor 722. Accordingly, the Tx UE 710 and the Rx UE 720 may wirelessly communicate with each other via the transceiver 716 and the transceiver 726, respectively.

From the perspective of the Rx UE, the processor 722 may receive a first configuration for SL-PRS resources via a transceiver 726. Processor 722 may then receive an AGC symbol for the SL-PRS resource via transceiver 726. Further, the processor 722 can receive SL-PRS resources via transceiver 726 based on a first configuration. The RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resources correspond to the same set of subcarriers, where the set of subcarriers includes one or more subcarriers.

In some embodiments, the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resources may be configured with the same RE offset.

In some implementations, AGC symbols can be disabled by a second configuration (e.g., a second configuration received via a higher layer message carried by the PSSCH).

In some implementations, the AGC symbols can include SL-PRS. Additionally or alternatively, the SL-PRS may include a sequence that is initialized based on a symbol index of the AGC symbol in the slot.

In some implementations, the processor 722 may also adjust the receive gain based on the AGC symbols.

In some implementations, the processor 722 can also perform relative velocity estimation based on the AGC symbol and the last symbol in the SL-PRS resource.

From the perspective of the Tx UE, the processor 712 may send a first configuration for SL-PRS resources via the transceiver 716. Processor 712 may then transmit an AGC symbol for the SL-PRS resources via transceiver 716. Further, the processor 712 can transmit SL-PRS resources via the transceiver 716 based on the first configuration. The RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resources correspond to the same set of subcarriers, where the set of subcarriers includes one or more subcarriers.

In some embodiments, the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resource may be transmitted by the same RE offset.

In some implementations, AGC symbols can be disabled by a second configuration (e.g., a second configuration of higher layer messaging carried over PSSCH).

In some implementations, the AGC symbols can include SL-PRS. Additionally or alternatively, the SL-PRS may include a sequence that is initialized based on a symbol index of the AGC symbol in the slot.

In some embodiments, the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resources may be transmitted through the same spatial filter.

In some embodiments, the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resources may be quasi-co-located.

Illustrative Process

Fig. 8 is a flowchart of an exemplary process 800 according to an embodiment of the invention. Process 800 may be an exemplary implementation of the above scenario/scheme (whether partially or fully) with respect to supporting AGC symbols for SL-PRS reception in mobile communications. Process 800 may represent an aspect of an implementation of features of Rx UE 720. Process 800 may include one or more operations, actions, or functions as illustrated by one or more of blocks 810 through 830. Although the individual blocks are shown as discrete, the individual blocks in process 800 may be split into more blocks, combined into fewer blocks, or a portion of the blocks removed, depending on the desired implementation. Further, the blocks/sub-blocks of process 800 may be performed in the order shown in FIG. 8 or may be performed in a different order. Process 800 may be implemented by Rx UE 720 or any suitable UE or machine type device. For illustrative purposes only and not by way of limitation, process 800 is described below in the context of Rx UE 720. Process 800 may begin at block 810.

At 810, the process 800 may include a processor 722 of an Rx UE 720 receiving a first configuration for SL-PRS resources via a transceiver 726. Process 800 may proceed from 810 to 820.

At 820, process 800 can include processor 722 receiving an AGC symbol for SL-PRS resources via transceiver 726. Process 800 may proceed from 820 to 830.

At 830, process 800 can include processor 722 receiving SL-PRS resources via transceiver 726 based on a first configuration. Wherein the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resources correspond to the same set of subcarriers, the set of subcarriers comprising one or more subcarriers.

In some embodiments, the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resources may be configured with the same RE offset.

In some implementations, AGC symbols can be disabled by a second configuration (e.g., a second configuration received via a higher layer message carried by the PSSCH).

In some implementations, the AGC symbols can include SL-PRS. Additionally or alternatively, the SL-PRS may include a sequence that is initialized based on a symbol index of the AGC symbol in the slot.

In some implementations, the process 800 can further include the processor 722 adjusting the receive gain based on the AGC symbols.

In some implementations, the process 800 can further include the processor 722 performing relative velocity estimation based on the AGC symbol and the last symbol in the SL-PRS resource.

Fig. 9 is a flow chart of an exemplary process 900 according to an embodiment of the invention. Process 900 may be an exemplary implementation of the above scenario/scheme (whether partially or fully) with respect to supporting AGC symbols for SL-PRS reception in mobile communications. Process 900 may represent an aspect of an implementation of features of Tx UE 710. Process 900 may include one or more operations, actions, or functions as illustrated by one or more of blocks 910 through 930. Although the individual blocks are shown as discrete, the individual blocks in process 900 may be split into more blocks, combined into fewer blocks, or a portion of the blocks removed, depending on the desired implementation. Further, the blocks/sub-blocks of process 900 may be performed in the order shown in fig. 9 or may be performed in a different order. Process 900 may be implemented by Tx UE 710 or any suitable UE or machine type device. For illustrative purposes only and not limitation, process 900 is described below in the context of Tx UE 710. Process 900 may begin at block 910.

At 910, the process 900 can include the processor 712 of the Tx UE 710 transmitting a first configuration for SL-PRS resources via the transceiver 716. Process 900 may proceed from 910 to 920.

At 920, process 900 may include processor 712 transmitting an AGC symbol for the SL-PRS resource via transceiver 716. Process 900 may proceed from 920 to 930.

At 930, process 900 can include processor 712 transmitting, via transceiver 716, SL-PRS resources based on the first configuration. Wherein the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resources correspond to the same set of subcarriers, the set of subcarriers comprising one or more subcarriers.

In some embodiments, the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resource may be transmitted by the same RE offset.

In some implementations, AGC symbols can be disabled by a second configuration (e.g., a second configuration of higher layer messaging carried over PSSCH).

In some implementations, the AGC symbols can include SL-PRS. Additionally or alternatively, the SL-PRS may include a sequence that is initialized based on a symbol index of the AGC symbol in the slot.

In some embodiments, the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resources may be transmitted through the same spatial filter.

In some embodiments, the RS in the AGC symbol and the SL-PRS in the last SL-PRS symbol of the SL-PRS resources may be quasi-co-located.

Additional description

The subject matter described in this specification sometimes illustrates different components included in, or connected with, different other components. It is to be understood that such depicted architectures are merely examples, and that in fact many other architectures can be implemented which achieve the same functionality. In a conceptual sense, any arrangement of components to achieve the same functionality is effectively "associated" such that the desired functionality is achieved. Thus, any two components in the present invention that are combined to achieve a particular functionality can be seen as "associated with" each other such that the desired functionality is achieved, irrespective of architectures or intermedial components. Likewise, any two components so associated can also be viewed as being "operably connected," or "operably coupled," to each other to achieve the desired functionality, and any two components capable of being so associated can also be viewed as being "operably couplable," to each other to achieve the desired functionality. Specific examples of operationally couplable include, but are not limited to, physically matable and/or physically interactable components and/or wirelessly interactable components and/or logically interactable components.

Still further, with respect to virtually any plural and/or singular term used herein, those having skill in the art may translate from the plural to the singular and/or from the singular to the plural as appropriate for the context and/or application. For clarity, various singular/plural permutations may be explicitly set forth in this invention.

Furthermore, those skilled in the art will understand that, in general, terms used in the present invention, and especially in the appended claims (e.g., bodies of the appended claims) are often intended as "open" terms, e.g., the term "including" should be interpreted as "including but not limited to," the term "having" should be interpreted as "having at least," the term "comprising" should be interpreted as "including but not limited to," and so forth. Those skilled in the art will also understand that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, to facilitate understanding, the appended claims may include use of the introductory phrases "at least one" and "one or more". However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles "a" or "an" limits any particular claim containing such introduced claim recitation to embodiments containing only one such recitation, even when the same claim includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "a" or "an", e.g., "a" and/or "an" should be interpreted to mean "at least one" or "one or more", as well as the use of the indefinite articles recited in the claim. Furthermore, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should be interpreted to mean at least the recited number, and the bare recitation of "two recitations," without other modifiers, for example, means at least two recitations, or two or more recitations. Further, where a convention analogous to "at least one of A, B and C, etc." is used, such a construction is generally intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B and C" would include but not be limited to systems having A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B and C together, etc.). Where a convention analogous to "at least one of A, B or C, etc." is used, such a construction is generally intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B or C" would include but not be limited to systems having a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B and C together, etc.). It should also be appreciated by those skilled in the art that virtually any disjunctive word and/or phrase presenting two or more alternatives, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the items, either of the items, or both. For example, the phrase "a or B" will be understood to include the possibilities of "a" or "B" or "a and B".

From the foregoing, it will be appreciated that various embodiments of the invention have been described herein for purposes of illustration, and that various modifications may be made without deviating from the scope and spirit of the invention. Accordingly, the various embodiments disclosed herein are not meant to be limiting, with the true scope and spirit being indicated by the following claims.

Claims (20)

1. A method of supporting AGC symbols for SL-PRS reception, comprising:

receiving, by a processor of a receiving user equipment, a first configuration for side link positioning reference signal, SL-PRS, resources;

receiving, by the processor, an automatic gain control, AGC, symbol for the SL-PRS resource; and

the SL-PRS resources are received by the processor based on the first configuration, wherein an RS in the AGC symbol corresponds to a same set of subcarriers including one or more subcarriers as a SL-PRS in a last SL-PRS symbol of the SL-PRS resources.

2. The method of supporting AGC symbols for SL-PRS reception of claim 1, wherein an RS in the AGC symbol is configured with a same resource element offset as a SL-PRS in a last SL-PRS symbol of the SL-PRS resource.

3. The method of supporting AGC symbols for SL-PRS reception of claim 1, wherein the AGC symbols are disabled by a second configuration.

4. The method of supporting AGC symbols for SL-PRS reception of claim 1, wherein the AGC symbols comprise SL-PRS.

5. The method of supporting AGC symbols for SL-PRS reception of claim 4, wherein the SL-PRS comprises a sequence initialized based on a symbol index of the AGC symbol in a slot.

6. The method of supporting AGC symbols for SL-PRS reception of claim 1, further comprising:

the receive gain is adjusted by the processor based on the AGC symbols.

7. The method of supporting AGC symbols for SL-PRS reception of claim 1, further comprising:

a relative velocity estimation is performed by the processor based on the AGC symbol and a last SL-PRS symbol of the SL-PRS resource.

8. A method of supporting AGC symbols for SL-PRS reception, comprising:

transmitting, by a processor of a transmitting user equipment, a first configuration for SL-PRS resources;

transmitting, by the processor, an AGC symbol for SL-PRS resources; and

the SL-PRS resources are transmitted by the processor based on the first configuration, wherein RS in the AGC symbol and SL-PRS in a last SL-PRS symbol of the SL-PRS resources correspond to a same set of subcarriers, the set of subcarriers including one or more subcarriers.

9. The method of supporting AGC symbols for SL-PRS reception of claim 8, wherein an RS in the AGC symbol is transmitted with a same resource element offset as a SL-PRS in a last SL-PRS symbol of the SL-PRS resource.

10. The method of supporting AGC symbols for SL-PRS reception of claim 8, wherein the AGC symbols are disabled via a second configuration.

11. The method of supporting AGC symbols for SL-PRS reception of claim 8, wherein the AGC symbols comprise SL-PRS.

12. The method of supporting AGC symbols for SL-PRS reception of claim 11, wherein the SL-PRS comprises a sequence initialized based on a symbol index of the AGC symbol in a slot.

13. The method of supporting AGC symbols for SL-PRS reception of claim 8, wherein an RS in the AGC symbol is transmitted through a same spatial filter as a SL-PRS in a last SL-PRS symbol of the SL-PRS resource.

14. The method of supporting AGC symbols for SL-PRS reception of claim 8, wherein an RS in the AGC symbol is quasi-co-located with a SL-PRS in a last SL-PRS symbol of the SL-PRS resource.

15. A user equipment, comprising:

a transceiver in wireless communication with at least one transmitting user equipment during operation; and

a processor communicatively coupled to the transceiver such that during operation, the processor performs the following:

receiving, via the transceiver, a first configuration for SL-PRS resources;

receiving an AGC symbol for the SL-PRS resource via the transceiver; and

the SL-PRS resources are received via the transceiver based on the first configuration, wherein an RS in the AGC symbol corresponds to a same set of subcarriers including one or more subcarriers as a SL-PRS in a last SL-PRS symbol of the SL-PRS resources.

16. The user equipment of claim 15, wherein the RS in the AGC symbol is configured with the same resource element offset as the SL-PRS in the last SL-PRS symbol of the SL-PRS resource.

17. The user equipment of claim 15, wherein the AGC symbols are disabled by a second configuration.

18. The user equipment of claim 15, wherein the AGC symbol comprises a SL-PRS.

19. The user equipment of claim 18, wherein the SL-PRS comprises a sequence initialized based on a symbol index of the AGC symbol in a slot.

20. The user device of claim 15, wherein during operation the processor further performs the following operations:

adjusting a receive gain based on the AGC symbols; or alternatively

A relative velocity estimation is performed based on the AGC symbol and a last SL-PRS symbol of the SL-PRS resource.