Location-based beam management in direct communication link

Abstract

The present document relates to a method for managing a beam on the basis of a location in a direct communication link, and a user equipment therefor. To this end, in a communication method, a first user equipment (UE): receives, from a second UE, location-based ID information of the second UE; determines, on the basis of a location-based ID of the second UE, a range of a beam to be used for a direct communication link with the second UE; and exchanges a beam management signal with the second UE on the basis of the range of the beam. In this case, the determining of the range of the beam includes determining a relative position with the first UE on the basis of the location-based ID of the second UE.

Description

Location-based beam management over direct communication links

[0001] The following description relates to communication using a direct communication link between user equipment (UE), and more specifically, to a method for managing a beam based on location in a direct communication link and a user equipment for the same.

[0002] Wireless communication systems utilize various technologies, including LTE, LTE-Advanced, and WiFi, and 5G is included. The three main usage scenarios for 5G include (1) Enhanced Mobile Broadband (eMBB), (2) Massive Machine Type Communication (mMTC), and (3) Ultra-reliable and Low Latency Communications (URLLC). Some use cases may require optimization across multiple areas, while others may focus on just a single Key Performance Indicator (KPI). 5G supports these diverse use cases in a flexible and reliable manner.

[0003] Figure 1 shows the structure of a system for 5G communication.

[0004] Referring to FIG. 1, a Next Generation - Radio Access Network (NG-RAN) may include a base station (20) that provides user plane and control plane protocol termination to a UE (10). For example, the base station (20) may include a next generation Node B (gNB) and / or an evolved Node B (eNB). For example, the UE (10) may be fixed or mobile, and may be referred to by other terms such as a terminal, a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a wireless device, etc. For example, the base station may be a fixed station that communicates with the UE (10), and may be referred to by other terms such as a base transceiver system (BTS), an access point, etc.

[0005] The example of Fig. 1 illustrates a case that includes only gNB. The base stations (20) can be connected to each other via Xn interfaces. The base stations (20) can be connected to a 5th generation core network (5G Core Network: 5GC) via an NG interface. More specifically, the base station (20) can be connected to an access and mobility management function (AMF) (30) via an NG-C interface, and can be connected to a user plane function (UPF) (30) via an NG-U interface.

[0006]

[0007] In the system for 5G communication as described above, a connection may be made between a UE (10) and a gNB via a Uu interface, and a connection may be made between UEs (10) via a PC5 interface, and a link via PC5 may be referred to as a side link. In the 5G communication system and its successor next-generation mobile communication, a communication method using a high frequency band (Frequency Range 2 or FR2) of 24 GHz or higher, unlike the existing communication frequency band (Frequency Range 1 or FR1), is being discussed.

[0008] In this type of FR2 communication method, it is required to form beams of signals and communicate them considering high path loss, and a method using RS (Reference Signal) is required for efficient beam management of the side link.

[0009] However, in order to manage beams for efficient communication between a transmitting UE and a receiving UE, the method of sweeping beams in all directions and determining the optimal beam based on the sweeping involves a large overhead, and since the procedure is performed by the UE, there is a problem that it may result in a large power loss.

[0010] In order to solve the above-described problem, one aspect of the present invention proposes a method for managing beams based on the locations of UEs in a direct communication link between UEs and a user device therefor.

[0011] The technology proposed below is assumed to be applicable not only to the current 5G system but also to 6G and subsequent mobile communication systems, and therefore, the term 'side link' used in 5G can be referred to as a 'direct communication link' between UEs, and the concept of 'direct communication link' is assumed to be used as a term to refer to a link adopted to correspond to the side link between 5G UEs in 6G and subsequent standards.

[0012] In addition, terms such as PSSCH (Physical Sidelink Shared Channel), PSCCH (Physical Sidelink Control Channel), and PSFCH corresponding to the sidelink channels used in 5G may be referred to as terms such as 'physical shared channel', 'physical control channel', and 'physical feedback channel' transmitted through the above-described direct communication link.

[0013] In one aspect of the present invention, it is proposed to limit the range of signal transmission and reception for beam management of a direct communication link between UEs based on the location of the UE, and to limit the range of the beam based on the state location between the UEs.

[0014] At this time, the beam management signal transmitted may correspond to CSI-RS (Channel Status Information -Reference Signal) and / or SSB (Synchronization Signal Block), but there is no need to exclude other terms used in response to signals transmitted for beam management in 6G and subsequent standards.

[0015] The problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0016] In one aspect of the present invention for solving the above-described problem, a method for performing communication with a second UE through a direct communication link by a first user equipment (UE) in a mobile communication system is proposed, the method including: receiving location-based ID information of the second UE from the second UE; determining a range of a beam to be used for the direct communication link with the second UE based on the location-based ID of the second UE; and exchanging a beam management signal with the second UE based on the range of the beam, wherein determining the range of the beam includes determining a relative location with respect to the first UE based on the location-based ID of the second UE.

[0017] In another aspect of the present invention for solving the above-described problem, a first user equipment (UE) for performing communication via a direct communication link with a second UE in a mobile communication system is proposed, the UE comprising: at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations, the operations including receiving location-based ID information of the second UE from the second UE; determining a range of a beam to be used for the direct communication link with the second UE based on the location-based ID of the second UE; and exchanging a beam management signal with the second UE based on the range of the beam, wherein determining the range of the beam includes determining a relative location with respect to the first UE based on the location-based ID of the second UE.

[0018] At this time, determining the range of the beam may include calculating a relative location ID based on the location-based ID of the first UE and the location-based ID of the second UE.

[0019] Additionally, the relative location ID can be grouped by dividing the relative locations of the first UE and the second UE into areas.

[0020] Additionally, the relative position ID may be associated with a transmission resource identifier of the beam management signal.

[0021] At this time, the first UE corresponds to a transmitting UE, the second UE corresponds to a receiving UE, and the first UE can transmit the beam management signal to the second UE only through a transmission resource corresponding to a transmission resource identifier associated with the relative location ID.

[0022] Additionally, the first UE corresponds to a receiving UE, the second UE corresponds to a transmitting UE, and the first UE can receive the beam management signal transmitted from the second UE only through a transmission resource corresponding to a transmission resource identifier associated with the relative location ID.

[0023] The above beam management signal may include CSI (Channel Status Information) - RS (Reference Signal).

[0024] Additionally, the location-based ID of the second UE may correspond to a zone ID that is defined based on a position including an x-axis position and a y-axis position on a horizontal plane of the second UE.

[0025] Additionally, the location-based ID of the second UE may correspond to an area ID that additionally considers the height direction position (z-axis position) of the second UE.

[0026] According to the embodiments of the present invention as described above, beams can be efficiently managed based on the locations of UEs in a direct communication link between UEs.

[0027] Specifically, the range of signal transmission and reception for beam management of a direct communication link between UEs is limited based on the location of the UE, and the range of the beam is limited based on the state location between the UEs, thereby reducing overhead due to beam management and minimizing power consumption of the UE.

[0028] The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by a person having ordinary skill in the art to which the present invention belongs from the description below.

[0029] Figure 1 shows the structure of a system for 5G communication.

[0030] FIG. 2 is a diagram for explaining channels that can be used in sidelink communication according to embodiments of the present invention.

[0031] FIG. 3 is a diagram for explaining a process of establishing a unicast link for performing direct communication between UEs according to one embodiment of the present invention.

[0032] FIG. 4 is a drawing for explaining a concept of performing location-based beam management according to one embodiment of the present invention.

[0033] FIG. 5 is a drawing specifically explaining a beam management method according to the embodiment of FIG. 4.

[0034] FIG. 6 is a drawing for explaining a concept of determining a relative position ID according to one embodiment of the present invention.

[0035] FIG. 7 is a diagram for explaining a concept of associating a relative location ID and a transmission resource identifier according to one embodiment of the present invention.

[0036] FIG. 8 is a diagram for explaining an operation method of a transmitting UE / receiving UE according to one embodiment of the present invention.

[0037] Figure 9 illustrates a wireless device to which the present technology can be applied.

[0038] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in the drawings, parts irrelevant to the description have been omitted to clearly explain the present invention, and similar parts have been designated with similar reference numerals throughout the specification.

[0039] Throughout the specification, whenever a part is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise stated.

[0040]

[0041] As described above, one aspect of the present invention proposes a method for managing beams based on the locations of UEs in a direct communication link between UEs, and a user equipment therefor. The proposed technology is assumed to be applicable not only to the current 5G system, but also to 6G and subsequent next-generation mobile communication systems. However, for the sake of convenience and to avoid confusion, the proposed technology will be described below assuming the current 5G system.

[0042] First, we will look at channels that can be used in sidelink communication according to embodiments of the present invention.

[0043] FIG. 2 is a diagram for explaining channels that can be used in sidelink communication according to embodiments of the present invention.

[0044] The embodiment of FIG. 2 can be combined with various embodiments of the present invention. In various embodiments of the present invention, the "transmission mode" may be referred to as a "mode" or a "resource allocation mode." Hereinafter, for convenience of explanation, the transmission mode in LTE may be referred to as the LTE transmission mode, and the transmission mode in NR may be referred to as the NR resource allocation mode.

[0045] Specifically, (a) of FIG. 2 represents UE operations related to LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1. For example, LTE transmission mode 1 can be applied to general SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[0046] Meanwhile, (b) of FIG. 2 shows UE operation related to LTE transmission mode 2 or LTE transmission mode 4 or NR resource allocation mode 2.

[0047] Referring to (a) of FIG. 2, in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the base station may schedule SL resources to be used by the UE for SL transmission (S8000). For example, the base station may transmit information related to SL resources and / or information related to UL resources to the first UE. The UL resources may include PUCCH resources and / or PUSCH resources. In addition, the UL resources may be resources for reporting SL HARQ feedback to the base station.

[0048] A first UE may receive information related to a dynamic grant (DG) resource and / or information related to a configured grant (CG) resource from a base station. The CG resource may include a CG type 1 resource or a CG type 2 resource. In this specification, a DG resource may be a resource that a base station configures / allocates to the first UE via downlink control information (DCI). In addition, in this specification, a CG resource may be a (periodic) resource that a base station configures / allocates to the first UE via DCI and / or an RRC message. For example, in the case of a CG type 1 resource, the base station may transmit an RRC message including information related to the CG resource to the first UE. In the case of a CG type 2 resource, the base station may transmit an RRC message including information related to the CG resource to the first UE, and the base station may transmit a DCI related to activation or release of the CG resource to the first UE.

[0049] In step S8010, the first UE may transmit a PSCCH (e.g., Sidelink Control Information (SCI) or 1st-stage SCI) to the second UE based on the resource scheduling. In step S8020, the first UE may transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S8030, the first UE may receive a PSFCH (Physical Sidelink Feedback Channel) related to the PSCCH / PSSCH from the second UE. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second UE via the PSFCH. In step S8040, the first UE may transmit / report HARQ feedback information to the base station via a PUCCH or a PUSCH. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on the HARQ feedback information received from the second UE. In addition, the HARQ feedback information reported to the base station may be information generated by the first UE based on a rule set in advance. The DCI may be DCI for scheduling the SL. The format of the DCI may be DCI format 3_0 or DCI format 3_1.

[0050] [Table 1] shows an example of DCI for SL scheduling.

[0051] Format 3_0- Resource pool index -roof (log2I) bits, whereIis the number of resource pools for transmission configured by the higher layer parametersl-TxPoolScheduling.- Time gap - 3 bits determined by higher layer parametersl-DCI-ToSL-Trans- HARQ process number - 4 bits- New data indicator - 1 bit- Lowest index of the subchannel allocation to the initial transmission -roof (log2(N SL subChannel)) bits- SCI format 1-A fields:- Frequency resource assignment.- Time resource assignment.- PSFCH-to-HARQ feedback timing indicator -roof (log2N ft_timing ) bits, where N ft_timingis the number of entries in the higher layer parametersl-PSFCH-ToPUCCH- PUCCH resource indicator - 3 bits.- Configuration index - 0 bit if the UE is not configured to monitor DCI format 3_0 with CRC scrambled by SL-CS-RNTI; otherwise 3 bits. If the UE is configured to monitor DCI format 3_0 with CRC scrambled by SL-CS-RNTI, this field is reserved for DCI format 3_0 with CRC scrambled by SL-RNTI.- Counter sidelink assignment index - 2 bits- 2 bits if the UE is configured withpdsch-HARQ-ACK-Codebook = dynamic- 2 bits if the UE is configured withpdsch-HARQ-ACK-Codebook = semi-static- Padding bits, if requiredFormat 3_1- Timing offset - 3 bits determined by higher layer parametersl-TimeOffsetEUTRA- Carrier indicator -3 bits.- Lowest index of the subchannel allocation to the initial transmission - roof (log2(N SLsubChannel) bits.- Frequency resource location of initial transmission and retransmission- Time gap between initial transmission and retransmission- SL index - 2 bits- SL SPS configuration index - 3 bits.- Activation / release indication - 1 bit.

[0052] Referring to (b) of FIG. 2, in LTE transmission mode 2, LTE transmission mode 4, or NR resource allocation mode 2, the UE can determine SL transmission resources within SL resources configured by the base station / network or preset SL resources. The configured SL resources or preset SL resources may be a resource pool. For example, the UE can autonomously select or schedule resources for SL transmission. The UE can perform SL communication by selecting resources within the configured resource pool. For example, the UE can perform sensing and resource (re)selection procedures to select resources within a selection window. The sensing may be performed on a subchannel basis.

[0053] In step S8010, a first UE that has selected a resource within a resource pool can transmit a PSCCH (e.g., Sidelink Control Information (SCI) or 1st-stage SCI) to a second UE using the resource. In step S8020, the first UE can transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S8030, the first UE can receive a PSFCH related to the PSCCH / PSSCH from the second UE.

[0054] Referring to (a) or (b) of FIG. 2, a first UE may transmit an SCI to a second UE on a PSCCH. Alternatively, the first UE may transmit two consecutive SCIs (e.g., 2-stage SCIs) to the second UE on the PSCCH and / or the PSSCH. In this case, the second UE may decode the two consecutive SCIs (e.g., 2-stage SCIs) to receive the PSSCH from the first UE. In this specification, an SCI transmitted on a PSCCH may be referred to as a 1st SCI, a 1st SCI, a 1st-stage SCI, or a 1st-stage SCI format, and an SCI transmitted on a PSSCH may be referred to as a 2nd SCI, a 2nd SCI, a 2nd-stage SCI, or a 2nd-stage SCI format. For example, a 1st-stage SCI format may include SCI format 1-A, and a 2nd-stage SCI format may include SCI format 2-A and / or SCI format 2-B.

[0055]

[0056] FIG. 3 is a diagram for explaining a process of establishing a unicast link for performing direct communication between UEs according to one embodiment of the present invention.

[0057] Specifically, 9000 of FIG. 3 illustrates a process in which UE1 and UE2 perform initial beam pairing before establishing a unicast link. Additionally, 9500 of FIG. 3 illustrates a process in which UE1 and UE2 perform initial beam pairing after establishing a unicast link.

[0058] In both procedures 9000 and 9500 of FIG. 3, UE 1, which is a Tx UE, and UE 2, which is an Rx UE, can determine a destination ID for transmitting / receiving a DCR (Direct Communication Request) message (S9010, S9020, S9510, S9520).

[0059] For the initial beam pairing performed prior to unicast link establishment, at 9000 in FIG. 3, UE 1 can repeat the process of sweeping multiple beams and transmitting within a single symbol a predetermined number of times (S9030). UE 2, which receives a signal in which multiple beams within a slot are swept in this way, can fix the reception beam within a single slot, change the reception beam on a slot-by-slot basis, determine the reception beam that best pairs with the transmission beam of UE 1, and feed back information about the Tx beam to UE 1 (S9040).

[0060] Through beam pairing like this, UE 1 can transmit a corresponding DCR message to UE 2 (S9050).

[0061] Meanwhile, for the initial beam pairing performed after the unicast link is established, beam pairing can be performed in the form of UE 1 transmitting one beam per symbol at 9500 of FIG. 3 (S9030a to S9030d). When beam management is performed through RS transmission on a symbol-by-symbol basis in this way, processing may be delayed compared to the method of transmitting multiple beams in one symbol as in 9000 of FIG. 3. However, after the unicast link is established, the beam sweeping target is narrowed through the beam configuration between UE 1 and UE 2, thereby reducing the delay.

[0062] Through beam sweeping like this, UE 2SMS can transmit a feedback signal for the Tx beam to UE 1 (S9540).

[0063]

[0064] As described above with respect to FIG. 3, beam sweeping is required for beam management both before and after unicast link establishment, and as the beam is swept in all directions considering various positional relationships between UEs, overhead increases and power loss of the UE may occur.

[0065] FIG. 4 is a drawing for explaining a concept of performing location-based beam management according to one embodiment of the present invention.

[0066] As illustrated in FIG. 4, the first UE can receive location-based ID information of the second UE from the second UE (S410). Here, the location-based ID can correspond to a zone ID defined as follows.

[0067] [Formula 1]

[0068] x1= Floor (x / L) Mod 64;

[0069] y1= Floor (y / L) Mod 64;

[0070] Zone_id = y1* 64 + x1

[0071]

[0072] Here, L can be set by the length of the area ID received as an RRC (Radio Resource Control) message, and the x and y values ​​can represent the x-axis position and y-axis position on the horizontal plane of the corresponding UE, respectively.

[0073] Meanwhile, with the recent introduction of aerial UEs such as UAVs (Unmanned Aerial Vehicles), a concept of additionally considering the height (altitude) direction position (z-axis position) of the corresponding UE in addition to the aforementioned zone ID (Zone_id) is being discussed, and the zone ID to be used in embodiments of the present invention may utilize a concept set by additionally considering the altitude information of the corresponding UE.

[0074] Meanwhile, based on the location-based ID of the second UE received as described above, the first UE can determine the location of the second UE as a relative location relative to its own location (S420). For example, the first UE can calculate a relative location ID based on its own location-based ID and the received location-based ID of the second UE, and utilize this as will be specifically described below with reference to FIGS. 5 and 6.

[0075] Additionally, based on this relative position, the first UE can determine the range of the beam to be used for a direct communication link with the second UE (S430). For example, the first UE can limit the range of the beam for beam sweeping based on the relative position with respect to the second UE.

[0076] Based on the beam range determined in this manner, the first UE may exchange beam management signals with the second UE (S440). The beam management signals may include CSI-RS and / or SSB discussed in 5G communications, but need not be limited to these terms.

[0077] FIG. 5 is a drawing specifically explaining a beam management method according to the embodiment of FIG. 4.

[0078] First, the upper part (540) of Fig. 5 is a drawing illustrating the transmission signal beam of UE1 and the reception signal beam of UE2 in the time domain, respectively, and the lower part (550) of Fig. 5 is a drawing illustrating the concept of the relative positions of UE1 and UE2. In the upper part (540) of Fig. 5, the time domain is exemplarily illustrated in units corresponding to slots of 5G, but the transmission time units may be changed in 6G or subsequent standards.

[0079] Taking the 5G system as an example, as described above with reference to FIG. 3, UE1 can sweep beams in all directions centered on its own position in a grouped form in slot units, and in the upper part (540) of FIG. 5, beams transmitted by being grouped in slot units are respectively referred to as reference numerals 510a, 510b, 510c, 510d, and 510e. Meanwhile, UE2 receives each transmission beam as a fixed beam in the slot in order to select an optimal reception beam among the beams swept in a specific slot, and the slot-based reception beams of UE2 are referred to as reference numerals 520a and 520b.

[0080] According to the current 5G system, a large amount of time domain resources are used to find the optimal beam pair by sweeping the transmit and receive beams as described above.

[0081] However, in one embodiment of the present invention, when the relative position of UE2 centered on UE1 is specified as shown in the lower part (550) of FIG. 5, the range of transmission and reception beams can be limited to a specific range of beams (530) among several beams, and in FIG. 5, a method is proposed to reduce overhead and reduce power consumption of the UE by performing beam sweeping only within the beam group range of a group designated by reference numeral 510b among the transmission beam groups of UE1.

[0082] Of course, it is also possible to limit the range of the receiving beam based on the relative position concept illustrated at the bottom (550) of FIG. 5, and in order to easily determine the relative position, in one embodiment of the present invention, the area ID of UE1 may be set to be associated with the transmission RS resource area, and the area ID of UE2 may be set to be associated with the reception RS resource area.

[0083]

[0084] FIG. 6 is a drawing for explaining a concept of determining a relative position ID according to one embodiment of the present invention.

[0085] First, it is proposed that the relative location ID according to one embodiment of the present invention be set in association with each other between the transmitting UE and the receiving UE. For example, reference numeral 610 of FIG. 6 illustrates that, from the perspective of the transmitting UE, UE1, the relative location ID is set to 1, 2, 3, and 4 in a clockwise direction for each direction, and reference numeral 620 of FIG. 6 illustrates that, from the perspective of the receiving UE, UE2, the relative location ID is set to 1, 2, 3, and 4 in a clockwise direction for each direction.

[0086] However, the setting of the relative location IDs of UE1 and UE2 is set based on the relative locations of the two UEs, and accordingly, it is proposed to set the relative location ID 1 of UE1 to correspond to the relative location ID 1 of UE2.

[0087] To facilitate the establishment of such relative location IDs, the area IDs corresponding to the above [Formula 1] or an improved concept thereof may be grouped and used to calculate the relative location ID between UE1 and UE2. The number of area IDs corresponding to each group may be predefined or may be defined according to an RRC message configuration.

[0088] In one embodiment of the present invention, after setting the relative area ID as described above, the existing area ID may be set to 0.

[0089]

[0090] FIG. 7 is a diagram for explaining a concept of associating a relative location ID and a transmission resource identifier according to one embodiment of the present invention.

[0091] In one embodiment of the present invention, it is proposed to associate the above-described relative position ID with a transmission resource identifier of a beam management signal. Here, the transmission resource identifier may correspond to a value obtained by modulating a slot index that distinguishes a slot based on a beam sweeping cycle, in cases where sweeping is performed by beam group unit per slot unit, as in the 5G system described above.

[0092] In the example of Fig. 7, four relative location IDs are set (R-Loc_ID 1, R-Loc_ID 2, R-Loc_ID 3, R-Loc_ID 4), and each is set to be associated with four slots.

[0093] However, the transmission resource identifier associated with the relative location ID need not be limited to a slot identifier as shown in FIG. 7, and may include concepts distinguished according to RS burst units, slot units, symbol units, or other predefined mapping patterns.

[0094] FIG. 8 is a diagram for explaining an operation method of a transmitting UE / receiving UE according to one embodiment of the present invention.

[0095] FIG. 8 also illustrates an example in which the relative position IDs of UE1 and UE2 are each associated with a transmission resource (slot) of a beam management signal, similar to FIG. 7.

[0096] In this embodiment, when the relative position ID 2 is determined based on the relative positions of UE1 and UE2 as illustrated in drawing reference numeral 810, the concept is illustrated in which UE1 is set to transmit only the beam corresponding to the relative position ID 2 to UE2 as illustrated in drawing reference numeral 820, and not to transmit the remaining beams.

[0097] Additionally, from the perspective of the receiving UE, UE2, since the relative position ID 2 is determined, the beam management signal transmitted by UE1 can be set to be received only through the slot corresponding to the relative position ID 2 among all beams.

[0098] Through the embodiments described above, the transmitting and receiving UE can reduce overhead for beam sweeping and minimize power consumption.

[0099]

[0100] Figure 9 illustrates a wireless device to which the present technology can be applied.

[0101] Referring to FIG. 9, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals via various wireless access technologies (e.g., LTE, NR). Here, the first wireless device (100) and the second wireless device (200) can each correspond to the transmitting and receiving UE of FIG. 4.

[0102] A first wireless device (100) includes one or more processors (102) and one or more memories (104), and may further include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memories (104) and / or the transceivers (106), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (102) may process information in the memory (104) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (106). In addition, the processor (102) may receive a wireless signal including second information / signal via the transceiver (106), and then store information obtained from signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE E-UTRA, 5G NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals via one or more antennas (108). The transceiver (106) may include a transmitter and / or a receiver. The transceiver (106) may be used interchangeably with an RF (Radio Frequency) unit. In the present invention, a wireless device may also mean a communication modem / circuit / chip.

[0103] The second wireless device (200) includes one or more processors (202), one or more memories (204), and may further include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memories (204) and / or the transceivers (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers (206). Furthermore, the processor (202) may receive a wireless signal including fourth information / signals via the transceivers (206), and then store information obtained from signal processing of the fourth information / signals in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may store software code including commands for performing some or all of the processes controlled by the processor (202) or performing the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in this document. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE E-UTRA, 5G NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via one or more antennas (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF unit. In the present invention, a wireless device may also mean a communication modem / circuit / chip.

[0104] Hereinafter, the hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed herein, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) can receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed herein.

[0105] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software configured to perform one or more processors (102, 202) or stored in one or more memories (104, 204) and executed by one or more processors (102, 202). The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.

[0106] One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories (104, 204) may be configured as ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories (104, 204) may be located internally and / or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0107] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or flowcharts of this document, to one or more other devices. One or more transceivers (106, 206) can receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of this document, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, one or more processors (102, 202) can control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be coupled to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, or the like, as referred to in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein, via one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert received user data, control information, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202).One or more transceivers (106, 206) may convert user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.

[0108]

[0109] The detailed description of the preferred embodiments of the present invention disclosed above has been provided to enable those skilled in the art to implement and practice the present invention. While the above description has been made with reference to preferred embodiments of the present invention, those skilled in the art will appreciate that various modifications and variations can be made to the present invention without departing from the scope of the present invention. For example, those skilled in the art can utilize the individual components described in the above-described embodiments in combination with each other.

[0110] Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0111] The communication method through a direct communication link according to the embodiments of the present invention as described above and the user device therefor are suitable for use in a side link communication environment discussed in 3GPP, but can also be widely used in communication methods other than 3GPP to reduce the burden when beam management is performed through beam sweeping.

Claims

1. In a method for a first user equipment (UE) to communicate with a second UE through a direct communication link in a mobile communication system, Receive location-based ID information of the second UE from the second UE; Based on the location-based ID of the second UE, determining the range of the beam to be used for the direct communication link with the second UE; and Based on the range of the beam, including exchanging a beam management signal with the second UE, Determining the range of the above beam is: Including determining a relative location with respect to the first UE based on the location-based ID of the second UE; Communication method.

2. In paragraph 1, Determining the range of the above beam is: Comprising calculating a relative location ID based on the location-based ID of the first UE and the location-based ID of the second UE, Communication method.

3. In paragraph 2, The above relative location ID is grouped by dividing the relative locations of the first UE and the second UE into areas. Communication method.

4. In paragraph 2, The above relative position ID is associated with the transmission resource identifier of the beam management signal, Communication method.

5. In paragraph 4, The first UE corresponds to a transmitting UE, and the second UE corresponds to a receiving UE, The first UE transmits the beam management signal to the second UE only through a transmission resource corresponding to a transmission resource identifier associated with the relative location ID. Communication method.

6. In paragraph 4, The first UE corresponds to a receiving UE, and the second UE corresponds to a transmitting UE, The first UE receives the beam management signal transmitted from the second UE only through a transmission resource corresponding to a transmission resource identifier associated with the relative location ID. Communication method.

7. In paragraph 1, The above beam management signal is, CSI (Channel Status Information) - including RS (Reference Signal), Communication method.

8. In paragraph 1, The location-based ID of the second UE is: Corresponding to a zone ID defined based on the position including the x-axis position and y-axis position on the horizontal plane of the second UE, Communication method.

9. In paragraph 8, The location-based ID of the second UE is: Corresponding to the area ID that additionally considers the height direction position (z-axis position) of the above second UE, Communication method.

10. In a mobile communication system, a first user equipment (UE) that performs communication through a direct communication link with a second user equipment (UE), at least one processor; and At least one computer memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform operations; The above actions are, Receive location-based ID information of the second UE from the second UE; Based on the location-based ID of the second UE, determining the range of the beam to be used for the direct communication link with the second UE; and Based on the range of the beam, including exchanging a beam management signal with the second UE, Determining the range of the above beam is: Including determining a relative location with respect to the first UE based on the location-based ID of the second UE; User device.

Images