Patent Application
20240406977
The present invention relates to a method performed by a user equipment, and a user equipment.
Sidelink (SL) communication (e.g., when SL resource allocation mode 2 is configured) can support inter-user equipment (UE) coordination functions, e.g., coordination of resource allocation between two or more UEs. The inter-UE coordination functions need to solve a series of problems, for example, how to determine two or more UEs related to inter-UE coordination, and how to determine one or more messages related to inter-UE coordination and definitions, configurations, mapping, transmission, reception, etc., of resources respectively used thereby.
In order to solve at least some of the above problems, the present invention provides a method performed by a user equipment and a user equipment. A priority is determined for each resource conflict, so as to determine, on the basis of the priority, whether to transmit one or more resource conflict indications triggered by the resource conflict, thereby effectively solving the problem of priority when resource conflict indications triggered by a plurality of resource conflicts are to be transmitted on overlapping time domain resources.
According to the present invention, provided is a method performed by a user equipment, characterized by comprising: determining a resource conflict caused by resources respectively reserved in one or more SCI formats 1-A, and transmitting a physical sidelink feedback channel (PSFCH) for indication of the resource conflict, wherein a priority value of the PSFCH is equal to the smallest value among priority values respectively indicated by the one or more SCI formats 1-A.
In addition, according to the present invention, provided is a user equipment, comprising: a processor; and a memory, having instructions stored therein, wherein the instructions, when run by the processor, perform the aforementioned method.
Therefore, the present invention provides a method, in which a priority is determined for each resource conflict, so as to determine, on the basis of the priority, whether to transmit one or more resource conflict indications triggered by the resource conflict, thereby effectively solving the problem of priority when resource conflict indications triggered by a plurality of resource conflicts are to be transmitted on overlapping time domain resources.
The above and other features of the present invention will be more apparent from the following detailed description in combination with the accompanying drawings, in which:
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the present invention should not be limited to the specific embodiments described below. In addition, detailed descriptions of well-known technologies not directly related to the present invention are omitted for the sake of brevity, in order to avoid obscuring the understanding of the present invention.
In the following description, a 5G (or referred to as “New Radio” (NR) or 5G NR) mobile communication system and later evolved versions thereof (e.g., 5G Advanced) are used as exemplary application environments to specifically describe a plurality of embodiments according to the present invention. However, it is to be noted that the present invention is not limited to the following embodiments, but is applicable to many other wireless communication systems, such as a communication system after 5G and a 4G mobile communication system before 5G.
The terms given in the present invention may vary in Long Term Evolution (LTE), LTE-Advanced, LTE-Advanced Pro, NR, and subsequent communication systems, but unified terms are used in the present invention. When applied to a specific system, the terms may be replaced with terms used in the corresponding system.
Unless otherwise specified, in all embodiments and implementations of the present invention:
in ascending order of slot indexes, and if
then the slot lr(0≤r<1024×2μ−NS
Optionally, a resource in a coordination resource set may be a conflicting resource detected by UE-A, and correspondingly, the coordination information indication may be referred to as a “resource conflict indication” or a “conflict indication”. A resource conflict (or referred to as a “conflict”) may be related to one or more resources. After UE-A detects the resource conflict, one or more resource conflict indications may be transmitted. A coordination resource set corresponding to each resource conflict indication may include one or more resources related to the resource conflict.
For example, for a resource R1 reserved by UE-B1, a resource R2 reserved by UE-B2, . . . , and a resource Rn reserved by UE-Bn that are detected by UE-A, when one or more among the following are satisfied, UE-A may consider that the resource R1, the resource R2, . . . , and the resource Rn are conflicting resources:
As another example, if UE-A detects that UE-B1 has reserved the resource R1, and when one or more of the following are satisfied, UE-A may consider that the resource R1 is a conflicting resource:
Optionally, when UE-A detects that the resource R1 reserved by the UE-B1, the resource R2 reserved by the UE-B2, . . . , and the resource Rn reserved by the UE-Bnare conflicting resources, UE-A may transmit a resource conflict indication to one or more among UE-B1, UE-B2, . . . , and UE-Bn. Optionally, UE-A transmits, on a “resource conflict indication resource” associated with the resource R1, a resource conflict indication to UE-B1, transmits, on a “resource conflict indication resource” associated with the resource R2, a resource conflict indication to UE-B2, . . . , and transmits, on a “resource conflict indication resource” associated with the resource Rn, a resource conflict indication to UE-Bn. Due to reasons such as UE transmission capabilities and/or priority, UE-A may discard one or more resource conflict indications.
Optionally, a resource conflict may be a conflict in a slot that has passed, and corresponding resource conflict detection may be referred to as “post-conflict detection”.
Optionally, a resource conflict may be a conflict in a future slot (or be referred to as “a potential conflict” or “an expected conflict”), and corresponding resource conflict detection may be referred to as “pre-conflict detection”.
Optionally, a resource conflict may be a conflict of resources in the same resource pool, or in different resource pools (e.g., two different resource pools on an SL carrier or SL BWP), or in two different carriers (e.g., an SL carrier and a UL carrier).
Optionally, a resource in a coordination resource set may be a resource (a preferred resource) that UE-A expects UE-B to use preferentially (correspondingly, the coordination information indication may be referred to as a “preferred resource indication”). For example, UE-A expects UE-B to select (or preferentially select) said resource when UE-B performs resource selection (e.g., resource selection performed for SL transmission from UE-B to UE-A).
Optionally, a resource in a coordination resource set may be a resource (a non-preferred resource) that UE-A does not expect UE-B to use (or, preferentially not to use) (correspondingly, the coordination information indication may be referred to as a “non-preferred resource indication”). For example, UE-A expects UE-B to exclude (or preferentially exclude) said resource when UE-B performs resource selection (e.g., resource selection performed for SL transmission from UE-B to UE-A).
Optionally, the coordination information may be included in control information. The control information may be physical layer control information, or higher layer control information. For example, the coordination information may be included in 1st-stage SCI. As another example, the coordination information may be included in 2nd-stage SCI. As another example, the coordination information may be included in sidelink feedback control information (SFCI). As another example, the coordination information may be included in other control information (e.g., referred to as sidelink coordination control information (SCCI)).
Optionally, the coordination information may be included in higher layer (e.g., the MAC layer, or the RRC layer) signaling. For example, the coordination information may be included in a MAC Control Element (MAC CE). As another example, the coordination information may be included in an RRC message.
Optionally, one coordination information indication may be carried by one physical layer channel (or one transmission of the physical layer channel), or may be carried by one physical layer signal (or one transmission of the physical layer signal). For convenience, the physical layer channel/signal may be referred to as a “Physical Sidelink Coordination Information Channel/Signal” (PSCICHS). Optionally, depending on different coordination types, the PSCICHS may be different physical layer channels or signals. For example, for a preferred resource indication and/or a non-preferred resource indication, the PSCICHS may be a PSCCH, a PSSCH, a PSCCH+PSSCH, a PSFCH, another physical layer channel, or a physical layer signal. For a resource conflict indication, the PSCICHS may be a PSFCH, or another physical layer channel, or a physical layer signal.
Optionally, a resource (e.g., a time domain and/or frequency domain and/or code domain and/or spatial domain resource) occupied by a PSCICHS (or a PSCICHS transmission) may be referred to as a “PSCICHS resource”. Optionally, a PSCICHS resource (or a time domain resource corresponding to the PSCICHS resource, e.g., a slot in which the PSCICHS resource is located, or one or more symbols in which the PSCICHS resource is located) may be referred to as a “PSCICHS occasion”, a “PSCICHS occasion resource”, or a “PSCICHS resource occasion”. For a UE transmitting a PSCICHS, a PSCICHS resource (or a time domain resource corresponding to the PSCICHS resource, e.g., a slot in which the PSCICHS resource is located, or one or more symbols in which the PSCICHS resource is located) may be referred to as a “PSCICHS transmission resource”, a “PSCICHS transmission occasion”, a “PSCICHS transmission occasion resource”, or a “PSCICHS transmission resource occasion”. For a UE receiving a PSCICHS, a PSCICHS resource (or a time domain resource corresponding to the PSCICHS resource, e.g., a slot in which the PSCICHS resource is located, or one or more symbols in which the PSCICHS resource is located) may be referred to as a “PSCICHS reception resource”, a “PSCICHS reception occasion”, a “PSCICHS reception occasion resource”, or a “PSCICHS reception resource occasion”.
Optionally, the PSCICHS resource may be configured in an SL carrier (e.g., configured in an information element SL-FreqConfigCommon or configured in an information element SL-FreqConfig). There may be zero or one or more “PSCICHS configurations” in one SL carrier.
Optionally, the PSCICHS resource may be configured in an SL BWP (e.g., configured in an information element SL-BWP-Config or configured in an information element SL-BWP-Generic). There may be zero or one or more PSCICHS configurations in one SL BWP. For each PSCICHS configuration, a PSCICHS resource may occupy one or more sub-channels (or one or more resource blocks) configured in one or more resource pools in the SL BWP, or does not occupy any sub-channel (or any resource block) configured in any resource pool in the SL BWP.
Optionally, the PSCICHS resource may be configured in a resource pool (e.g., configured in an information element SL-ResourcePool). There may be zero or one PSCICHS configuration in one resource pool. A PSCICHS resource may occupy one or more sub-channels (or one or more resource blocks) configured in the resource pool, or does not occupy any sub-channel (or any resource block) configured in the resource pool.
Optionally, a PSCICHS configuration corresponding to a PSCICHS transmission and/or a corresponding PSCICHS resource may be determined according to a predefined or configured or pre-configured method. For example, no PSCICHS configuration is present in a resource pool u1, but a PSCICHS configuration is present in a resource pool u2. Correspondingly, the resource pool u1 does not support the coordination information indication (e.g., cannot indicate a resource conflict in the resource pool u1) , but the resource pool u2 supports the coordination information indication (e.g., a resource conflict detected in the resource pool u2 may be indicated by one or more PSCICHS transmissions in the resource pool u2). As another example, no PSCICHS configuration is present in the resource pool u1, but a PSCICHS configuration is present in each of the resource pool u2 and a resource pool u3. Correspondingly, coordination information related to the resource pool u1 (e.g., a resource conflict indication corresponding to a resource conflict detected in the resource pool u1) may be predefined or configured or pre-configured to be indicated by means of one or more PSCICHS transmissions in the resource pool u2. Coordination information related to the resource pool u2 (e.g., a resource conflict indication corresponding to a resource conflict detected in the resource pool u2) may be (by default) indicated by means of one or more PSCICHS transmissions in the resource pool u2, or may be predefined or configured or pre-configured to be indicated by means of one or more PSCICHS transmissions in the resource pool u3. As another example, no PSCICHS configuration is present in the resource pool u1, but a PSCICHS configuration is present in an SL BWP in which the resource pool u1 is located. Correspondingly, coordination information related to the resource pool u1 (e.g., a resource conflict indication corresponding to a resource conflict detected in the resource pool u1) may be predefined or configured or pre-configured to be indicated by one or more PSCICHS transmissions in the SL BWP. As another example, coordination information may be defined in an SL BWP (for example, defined across a resource pool, and specifically, for example, a resource conflict may correspond to a conflict between a resource in the resource pool u in the SL BWP and a resource in the resource pool u2 in the SL BWP, and for example, the two resources overlap temporally). Correspondingly, coordination information (e.g., a resource conflict indication corresponding to a resource conflict) may be predefined or configured or pre-configured to be indicated by one or more PSCICHS transmissions in the SL BWP.
Optionally, the PSCICHS resource may be determined by means of sensing and/or a resource selection mechanism. For example, a PSCICHS may be a PSCCH and/or a PSSCH.
Optionally, in the time domain, PSCICHS resources may occur periodically. A slot configured with PSCICHS resources may be referred to as a “PSCICHS resource slot” (or referred to as a “PSCICHS slot”). For a PSCICHS configuration, in a predefined period (e.g., an SFN period, or a DFN period; e.g., a duration of 10240 milliseconds; e.g., from SFN=0 to SFN=1023, or from DFN=0 to DFN=1023), a PSCICHS slot set may be denoted as TRESCI. For example, one PSCICHS configuration may include one PSCICHS slot period (e.g., denoted as NRESCI, the units being, for example, slots) and one PSCICHS slot offset (e.g., denoted as ORESCI, the unit being, for example, slots). NRESCI may be a predefined or configured or pre-configured value, or may be determined by one or more predefined or configured or pre-configured values. ORESCI may be a predefined or configured or pre-configured value, or may be determined by one or more predefined or configured or pre-configured values. Optionally, NRESCI and ORESCI may be defined in the physical slot set Tall. For example, for k1∈Tall, if k1 mod NRESCI=ORESCI, then the slot k1 is a PSCICHS slot. Optionally, NRESCI and ORESCI may be defined in the SL slot set TallSL. For example, for tk
Optionally, for a PSCICHS configuration, PSCICHS resources may be indexed (or numbered) according to a certain order within a time length TIDXCI,RES. For example, a set of PSCICHS resources within the time length TIDXCI,RES may be denoted as RIDXCI,RES={r0CI,RES,IDX, r1CI,RES,IDX, . . . , rN
Optionally, the method for indexing PSCICHS resources may be a “basic PSCICHS resource indexing method”, and is, for example, one of the following:
Optionally, the method for indexing PSCICHS resources may be a “combined PSCICHS resource indexing method”, and is, for example, one of the following:
Optionally, in the time domain, the size of a PSCICHS resource (e.g., denoted as Ntime,sizeCI,RES representing, e.g., Ntime,sizeCI,RES symbols) may be a predefined or configured or pre-configured value, or may be determined by one or more predefined or configured or pre-configured values. For example, Ntime,sizeCI,RES=1 symbol or Ntime,sizeCI,RES=2 symbols or Ntime,sizeCI,RES=3 symbols. Optionally, one PSCICHS resource may occupy Ntime,sizeCI,RES consecutive symbols (e.g., respectively denoted as PSCICHS symbol 0, PSCICHS symbol 1, . . . , and PSCICHS symbol Ntime,sizeCI,RES−1). Optionally, PSCICHS symbol Ntime,sizeCI,RES−1 may be used as a transmission gap, that is, a corresponding PSCICHS transmission does not occupy PSCICHS symbol Ntime,sizeCI,RES−1. Optionally, PSCICHS symbol 0 may be used for automatic gain control (AGC). Optionally, in a PSCICHS transmission, resource elements in a predefined PSCICHS symbol (e.g., PSCICHS symbol Ntime,sizeCI,RES−2) are copied to another PSCICHS symbol except PSCICHS symbol Ntime,sizeCI,RES−1.
Optionally, in the time domain, Ntime,numCI,RES(or Ntime,num,0CI,RES, or Ntime,num,1CI,RES, . . . ) may be a predefined or configured or pre-configured value (e.g., Ntime,numCI,RES=1 or Ntime,numCI,RES=2 or Ntime,numCI,RES32 3), or may be determined by one or more predefined or configured or pre-configured values.
Optionally, in the frequency domain, the size of a PSCICHS resource (e.g., denoted as, Nfreq,sizeCI,RESrepresenting, e.g., Nfreq,sizeCI,RES subcarriers, or Nfreq,sizeCI,RES resource blocks, or Nfreq,sizeCI,RES resource block groups, or Nfreq,sizeCI,RES sub-channels) may be a predefined or configured or pre-configured value, or may be determined by one or more predefined or configured or pre-configured values. For example, Nfreq,sizeCI,RES=1 resource block. Optionally, one PSCICHS resource may occupy Nfreq,sizeCI,RES consecutive subcarriers, or Nfreq,sizeCI,RES consecutive resource blocks, or Nfreq,sizeCI,RES consecutive resource block groups, or Nfreq,sizeCI,RES consecutive sub-channels.
Optionally, in the frequency domain, Nfreq,numCI,RES(or Nfreq,num,0CI,RES, or Nfreq,num,1CI,RES, . . . ) may be a predefined or configured or pre-configured value, or may be determined by one or more predefined or configured or pre-configured values.
Optionally, in the code domain, one PSCICHS resource may correspond to one cyclic shift, denoted, for example, as α. Specifically, for example, the cyclic shift corresponding to the PSCICHS resource rkCI,RES,IDX(k∈{0, 1, . . . , NIDXCI,RES−1}) may be denoted as αk. The cyclic shift αk may be used to determine a sequence corresponding to a PSCICHS transmission on the PSCICHS resource. For example, the sequence may be acquired by performing a corresponding cyclic shift on a base sequence, and is used to represent a value indicated in coordination information carried by the PSCICHS transmission. The base sequence may be determined according to a predefined and/or configured and/or pre-configured method. Optionally, the value indicated in the coordination information carried by the PSCICHS transmission may be determined according to a predefined or configured or pre-configured method, and for example, may be configured or pre-configured to be “resource conflict detected” or may be configured or pre-configured to be “no resource conflict detected”. Optionally, a cyclic shift may be represented by an index thereof in a set. For example, if the number of code domain PSCICHS resources multiplexed on a time-frequency resource having a time domain size of Ntime,sizeCI,RES and a frequency domain size of Nfreq,sizeCI,RES is six, and if each code domain PSCICHS resource corresponds to one cyclic shift, then corresponding cyclic shift indexes may be respectively 0, 1, . . . , and 5.
Optionally, in the code domain, one PSCICHS resource may correspond to one cyclic shift pair including two cyclic shifts, for example, respectively referred to as a first cyclic shift and a second cyclic shift. Specifically, for example, the cyclic shift pair corresponding to the PSCICHS resource rkCI,RES,IDX(k∈{0, 1, . . . , NIDXCI,RES−1}) may be denoted as (αk,0, αk,1), where αk,0 and αk,1 are respectively the first cyclic shift and the second cyclic shift. Each cyclic shift in the cyclic shift pair (αk,0, αk,1) may be used to determine a sequence corresponding to a PSCICHS transmission on the PSCICHS resource. For example, a first sequence acquired by performing the first cyclic shift on a base sequence is used to indicate a value, and a second sequence acquired by performing the second cyclic shift on the base sequence is used to indicate another value. The base sequence may be determined according to a predefined and/or configured and/or pre-configured method. Specifically, for example, two cyclic shifts in one cyclic shift pair are respectively used to indicate “resource conflict detected” and “no resource conflict detected”. As another example, two cyclic shifts in one cyclic shift pair are respectively used to indicate two different resource conflict types, e.g., “time-frequency resource overlapping” and “half-duplex conflict”. As another example, in one cyclic shift pair, one cyclic shift is used to indicate “resource conflict detected”, and the other cyclic shift does not indicate any value. As another example, in one cyclic shift pair, one cyclic shift is used to indicate “no resource conflict detected”, and the other cyclic shift does not indicate any value. A cyclic shift pair may be represented by an index thereof in a set. For example, if the number of code domain PSCICHS resources multiplexed on a time-frequency resource having a time domain size of Ntime,sizeCI,RES and a frequency domain size of Nfreq,sizeCI,RESis six, and if each code domain PSCICHS resource corresponds to one cyclic shift pair, then corresponding cyclic shift pair indexes may be respectively 0, 1, . . . , and 5.
Optionally, in the code domain, whether one PSCICHS resource corresponds to one cyclic shift or one cyclic shift pair may be determined by means of a predefined or configured or pre-configured method.
Optionally, in the code domain, Ncode,numCI,RES may be the number of code domain PSCICHS resources multiplexed on a time-frequency resource having a time domain size of Ntime,sizeCI,RES and a frequency domain size of Nfreq,sizeCI,RES. Optionally, Ncode,numCI,RES may be a predefined or configured or pre-configured value, or may be determined by one or more predefined or configured or pre-configured values. For example, Ncode,numCI,RES=2. As another example, Ncode,numCI,RES=4. As another example, Ncode,numCI,RES=6. As another example, Ncode,numCI,RES32 8. As another example, Ncode,numCI,RES=10. As another example, Ncode,numCI,RES=12. As another example, Ncode,numCI,RES=1. As another example, Ncode,numCI,RES=3. As another example, Ncode,numCI,RES=5. Optionally, Ncode,numCI,RES may represent the number of cyclic shifts, and correspondingly, the code domain index refers to a cyclic shift index. Optionally, Ncode,numCI,RES may represent the number of cyclic shift pairs, and correspondingly, the code domain index refers to a cyclic shift pair index.
Optionally, due to limitations on the number of PSCICHS resources, two or more PSCICHS transmissions triggered by the same or different resource conflicts may correspond to the same PSCICHS resource rkCI,RES,IDX.
Optionally, one PSCICHS transmission and one PSFCH transmission may correspond to the same base sequence but different cyclic shifts.
Optionally, one PSCICHS transmission and one PSFCH transmission may correspond to different base sequences.
Optionally, one or more PSCICHS transmissions and one or more PSFCH transmissions may be multiplexed on the same time-frequency resource (e.g., a time-frequency resource having a time domain size of Ntime,sizeCI,RES and a frequency domain size of Nfreq,sizeCI,RES).
Optionally, one PSCICHS resource and one PSFCH resource may correspond to the same time-frequency resource (e.g., a time-frequency resource having a time domain size of Ntime,sizeCI,RES and a frequency domain size of Nfreq,sizeCI,RES) and the same base sequence, but different cyclic shift pairs.
Optionally, one PSCICHS resource and one PSFCH resource may correspond to the same time-frequency resource (e.g., a time-frequency resource having a time domain size of Ntime,sizeCI,RES and a frequency domain size of Nfreq,sizeCI,RES) and the same base sequence, but a cyclic shift corresponding to the PSCICHS resource is not equal to either cyclic shift in a cyclic shift pair corresponding to the PSFCH resource.
Optionally, a sequence corresponding to a PSCICHS transmission may be denoted as x(n)=ru,vα,δ(n) or x(n)=ru,v(α,δ)(n), where
where
Optionally, for the PSCICHS resource rkCI,RES,IDX(k∈{0, 1, . . . , IDXCI,RES−1}), the parameter m0 and the parameter mcs for calculating the cyclic shift αk may be respectively denoted as m0k and mcsk.
Optionally, for the PSCICHS resource rkCI,RES,IDX(k∈{0, 1, . . . , IDXCI,RES−1}), the parameter m0 and the parameter mcs for calculating the first cyclic shift αk,0 may be respectively denoted as m0k and mcsk, and the parameter m0 and the parameter mcs for calculating the second cyclic shift αk,1 may be respectively denoted as m0k,1 and mcsk,1.
Optionally, for the PSCICHS resource rkCI,RES,IDX(k∈{0, 1, . . . , IDXCI,RES−1}), m0k,0 is equal to m0k,1. In this case, optionally, m0k may be used to represent m0k,0 (or m0k,1)
Optionally, for the PSCICHS resource rkCI,RES,IDX(k∈{0, 1, . . . , IDXCI,RES−1}), mcsk,0 is equal to mcsk,1 . In this case, optionally, mcsk may be used to represent mcsk,0 (or mcsk,1 ).
Optionally, one resource conflict may be associated with one priority. The priority may be indicated by a priority value. For example, a value set of the priority value may be {0, 1, . . . , 7}. As another example, the value set of the priority value may be {1, 2, . . . , 8}. Optionally, a greater priority value indicates a lower priority (or “priority order”). Alternatively, a smaller priority value indicates a lower priority (or “priority order”).
Optionally, one PSCICHS transmission may be associated with one priority. The priority may be indicated by a priority value. For example, a value set of the priority value may be {0, 1, . . . , 7}. As another example, the value set of the priority value may be {1, 2, . . . , 8}. Optionally, a greater priority value indicates a lower priority (or “priority order”). Alternatively, a smaller priority value indicates a lower priority (or “priority order”). Optionally, when no confusion is caused, the priority of a PSCICHS transmission may be referred to as the priority of a PSCICHS.
Optionally, one PSCICHS reception may be associated with one priority. The priority may be indicated by a priority value. For example, a value set of the priority value may be {0, 1, . . . , 7}. As another example, the value set of the priority value may be {1, 2, . . . , 8}. Optionally, a greater priority value indicates a lower priority (or “priority order”). Alternatively, a smaller priority value indicates a lower priority (or “priority order”). Optionally, when no confusion is caused, the priority of a PSCICHS reception may be referred to as the priority of a PSCICHS.
Optionally, the definition method of the priority associated with the PSCICHS transmission and the definition method of the priority associated with the PSCICHS reception may be the same. For example, the value range of the priority of one PSCICHS transmission and the value range of the priority of one PSCICHS reception may be the same, and may be compared to each other (e.g., due to UE capability limitations, when only one operation among a PSCICHS transmission and a PSCICHS reception can be performed, the operation having the higher priority is performed). Optionally, the definition method of the priority associated with the PSCICHS transmission and the definition method of the priority associated with the PSCICHS reception may be different from each other.
Optionally, the determination method of the priority value corresponding to the priority associated with the PSCICHS transmission and the determination method of the priority value corresponding to the priority associated with the PSCICHS reception may be the same or different from each other.
Optionally, a coordination information indication may be transmitted and/or received only when an inter-UE coordination function is activated. Methods of activating (or deactivating) the inter-UE coordination function may include a semi-persistent method (e.g., configured or pre-configured by means of a higher layer protocol) and/or a dynamic method (e.g., indicated in SCI). For example, if UE-A is not configured to activate the inter-UE coordination function, then UE-A does not transmit or receive a coordination information indication. As another example, if UE-A has been configured to activate the inter-UE coordination function, and UE-A detects a resource conflict between a resource R1 reserved by SCI1 and a resource R2 reserved by SCI2, and “coordination enable” is indicated in SCI1 while “coordination enable” is not indicated in SCI2 (or, “coordination disable” is indicated in SCI2), then UE-A may transmit a coordination information indication associated with SCI1 (or R1), but does not transmit a coordination information indication associated with SCI2 (or R2).
Optionally, a coordination information indication may be triggered according to one or more predefined or configured or pre-configured conditions by a UE transmitting the coordination information.
Optionally, a coordination information indication may be triggered by a “coordination request indication”. For example, UE-B transmits a coordination request indication (e.g., which may include a coordination type indication, e.g., a “conflict indication request”) to UE-A, and as a response, UE-A may detect whether a resource conflict occurs between UE-B and other UEs (e.g., including UE-A or not including UE-A), and include a detection result in a coordination information indication and transmit the same to UE-B.
Optionally, the coordination request may be included in control information. The control information may be physical layer control information, or higher layer control information. For example, the coordination request may be included in 1st-stage SCI. As another example, the coordination request may be included in 2nd-stage SCI. As another example, the coordination request may be included in SFCI. As another example, the coordination request may be included in other control information (e.g., in SCCI).
Optionally, the coordination request may be included in higher layer (e.g., the MAC layer, or the RRC layer) signaling. For example, the coordination request may be included in a MAC CE. As another example, the coordination request may be included in an RRC message.
Optionally, a coordination request indication may be carried by one physical layer channel (or one transmission of the physical layer channel), or may be carried by one physical layer signal (or one transmission of the physical layer signal). For convenience, the physical layer channel/signal may be referred to as a “Physical Sidelink Coordination Request Channel/Signal” (PSCRCHS). Optionally, depending on different coordination types, the PSCRCHS may be different physical layer channels or signals. For example, for a preferred resource indication and/or a non-preferred resource indication, the PSCRCHS may be a PSCCH, a PSSCH, a PSCCH+PSSCH, a PSFCH, another physical layer channel, or a physical layer signal. For a resource conflict indication, the PSCRCHS may be a PSFCH, another physical layer channel, or a physical layer signal.
Optionally, a resource (such as a time-domain and/or frequency-domain and/or code-domain and/or spatial-domain resource) occupied by a PSCRCHS (or a PSCRCHS transmission) may be referred to as a “PSCRCHS resource”. Optionally, a PSCRCHS resource (or a time domain resource corresponding to the PSCRCHS resource, e.g., a slot in which the PSCRCHS resource is located, or one or more symbols in which the PSCRCHS resource is located) may be referred to as a “PSCRCHS occasion”, a “PSCRCHS occasion resource”, or a “PSCRCHS resource occasion”. For a UE transmitting a PSCRCHS, a PSCRCHS resource (or a time domain resource corresponding to the PSCRCHS resource, e.g., a slot in which the PSCRCHS resource is located, or one or more symbols in which the PSCRCHS resource is located) may be referred to as a “PSCRCHS transmission resource”, a “PSCRCHS transmission occasion”, a “PSCRCHS transmission occasion resource”, or a “PSCRCHS transmission resource occasion”. For a UE receiving a PSCRCHS, a PSCRCHS resource (or a time domain resource corresponding to the PSCRCHS resource, e.g., a slot in which the PSCRCHS resource is located, or one or more symbols in which the PSCRCHS resource is located) may be referred to as a “PSCRCHS reception resource”, a “PSCRCHS reception occasion”, a “PSCRCHS reception occasion resource”, or a “PSCRCHS reception resource occasion”.
Optionally, the PSCRCHS resource may be configured in an SL carrier (e.g., configured in an information element SL-FreqConfigCommon or configured in an information element SL-FreqConfig). There may be zero or one or more “PSCRCHS configurations” in one SL carrier.
Optionally, the PSCRCHS resource may be configured in an SL BWP (e.g., configured in an information element SL-BWP-Config or configured in an information element SL-BWP-Generic). There may be zero or one or more “PSCRCHS configurations” in one SL BWP. For each PSCRCHS configuration, the PSCRCHS resource may occupy one or more sub-channels (or one or more resource blocks) configured in one or more resource pools in the SL BWP, or does not occupy any sub-channel (or any resource block) configured in any resource pool in the SL BWP.
Optionally, the PSCRCHS resource may be configured in a resource pool (e.g., configured in an information element SL-ResourcePool). There may be zero or one PSCRCHS configuration in one resource pool. The PSCRCHS resource may occupy one or more sub-channels (or one or more resource blocks) configured in the resource pool, or does not occupy any sub-channel (or any resource block) configured in the resource pool.
Optionally, the PSCRCHS resource may be determined by means of sensing and/or a resource selection mechanism. For example, a PSCRCHS may be a PSCCH and/or a PSSCH.
Optionally, in the time domain, PSCRCHS resources may occur periodically.
Optionally, in the time domain, the size of a PSCRCHS resource may be a predefined or configured or pre-configured value, or may be determined by one or more predefined or configured or pre-configured values.
Optionally, in the time domain, one or more PSCRCHS resources may be present in one PSCRCHS slot.
Optionally, in the frequency domain, the size of a PSCRCHS resource may be a predefined or configured or pre-configured value, or may be determined by one or more predefined or configured or pre-configured values.
Optionally, in the code domain, one PSCRCHS resource may correspond to one cyclic shift or an index of the cyclic shift. The cyclic shift may be used to determine a sequence corresponding to a PSCRCHS transmission on the PSCRCHS resource. For example, the sequence may be acquired by performing a corresponding cyclic shift on a predefined or configured or pre-configured base sequence, and is used to represent a value indicated in coordination information carried in the PSCRCHS transmission.
Optionally, in the code domain, one PSCRCHS resource may correspond to one cyclic shift pair or an index of the cyclic shift pair. The cyclic shift pair may correspond to two cyclic shifts (e.g., 0 and 6). Each cyclic shift may be used to determine a sequence corresponding to a PSCRCHS transmission on the PSCRCHS resource. For example, each sequence may be acquired by performing a corresponding cyclic shift on a predefined or configured or pre-configured base sequence, and is used to represent a value indicated in coordination information carried in the PSCRCHS transmission. Optionally, one of two cyclic shifts corresponding to one cyclic shift pair is used to represent a value indicated in coordination information carried in the PSCRCHS transmission, and the other does not indicate any value.
Optionally, one or more PSCRCHS transmissions and one or more PSFCH transmissions may be multiplexed on the same time-frequency resource (e.g., the same resource block in the same symbol).
Optionally, one PSCRCHS resource and one PSFCH resource may correspond to the same time-frequency resource (e.g., the same resource block in the same symbol) but different cyclic shift pairs.
Optionally, one PSCRCHS resource and one PSFCH resource may correspond to the same time-frequency resource (e.g., the same resource block in the same symbol), but a cyclic shift corresponding to the PSCRCHS resource is not equal to either cyclic shift in a cyclic shift pair corresponding to the PSFCH resource.
Optionally, one PSCRCHS transmission and one PSFCH transmission may correspond to the same base sequence but different cyclic shifts.
Optionally, one PSCRCHS transmission and one PSFCH transmission may correspond to different base sequences.
A method performed by a user equipment according to Embodiment 1 of the present invention will be described below with reference to
As shown in
Specifically, in step S101, one or more PSCICHSs to be transmitted in a PSCICHS transmission occasion are determined. For example, the one or more PSCICHSs are denoted as a PSCICHS, set CHSPSCICHSSCH,TX, and correspondingly, the number of elements in the set CHSPSCICHSSCH,TX is denoted as NPSCICHSSCH,TX.
Optionally, the PSCICHS transmission occasion may correspond to a time domain resource, e.g., a slot (e.g., denoted as ty
Optionally, a PSCICHS “to be transmitted” may be a “scheduled PSCICHS” or a “triggered PSCICHS”. For example, a scheduled PSCICHS may be a PSCICHS triggered by a resource conflict detected before (e.g., several slots prior to) the PSCICHS transmission occasion and corresponding to a PSCICHS resource on the PSCICHS transmission occasion.
Optionally, the PSCICHS in the set CHPSCICHSSCH,TX is triggered by NconflictSL,det resource conflicts (e.g., respectively denoted as c0SL, c1SL, . . . , cN
Optionally, for i∈{0, 1, . . . , NconflictSL,det−1}, j∈{0, 1, . . . , NiSL,det,conflict−1}, chsi,jSCH,TX,PSCICHS corresponds to a resource (e.g., denoted as Ri,jconflict) related to the resource conflict ciSL, or chsi,jSCH,TX,PSCICHS corresponds to the SCI (e.g., denoted as SCIi,jconflict) that reserved the resource Ri,jconflict.
In addition, in step S103, one or more PSCICHSs actually transmitted in the PSCICHS transmission occasion are determined (the one or more PSCICHSs are, for example, denoted as a PSCICHS set CHSPSCICHSFINAL,TX, and correspondingly, the number of elements in the set CHSPSCICHSFINAL,TX may be denoted as NPSCICHSFINAL,TX).
For example, the set CHSPSCICHSFINAL,TX may be equal to one among the following:
CHSPSCICHSINT,TX is a set PSCICHS set, and CHSPSCICHSEXC,TX is another PSCICHS set.
Optionally, the set CHSPSCICHSINT,TX may be equal to a “preferred PSCICHS set” (e.g., denoted as CHSPSCICHSPRIO,TX).
Optionally, the set CHSPSCICHSPRIO,TX may include (e.g., include and only include) some or all PSCICHSs in the PSCICHS set respectively triggered by NconflictSL,sel resource conflicts (e.g., sequentially denoted as
in descending order of the priorities) having the highest priorities among the resource conflicts c0SL, c1SL, . . . , cN
Optionally, the set CHSPSCICHSPRIO,TX may include (e.g., include and only include) NPSCICHSSL,sel PSCICHSs having the highest priorities in the set CHSPSCICHSSCH,TX, where NPSCICHSSL,sel≥1.
Optionally, NconflictSL,sel may be a predefined or configured or pre-configured value, or may be determined by one or more predefined or configured or pre-configured values.
Optionally, NconflictSL,sel may be a predefined or configured or pre-configured value, or may be determined by one or more predefined or configured or pre-configured values.
Optionally, NconflictSL,sel and/or NPSCICHSSL,sel may be related to one or more among the following:
For example, NconflictSL,sel may be the number of resource conflicts satisfying NPSCICHSMAX,TX and/or PCMAXPSCICHS and/or other restrictive conditions (e.g., including NconflictSL,sel ≤NconflictSL,det) (e.g., the maximum number of resource conflicts satisfying NPSCICHSMAX,TX and/or PCMAXPSCICHS and/or the other restrictive conditions, or the number of resource conflicts satisfying NPSCICHSMAX,TX and/or PCMAXPSCICHS and/or the other restrictive conditions and allowing the number of elements in the set CHSPSCICHSPRIO,TX to be the maximum, or the number of resource conflicts satisfying NPSCICHSMAX,TX and/or PCMAXPSCICHS and/or the other restrictive conditions and autonomously selected by the UE).
As another example, NPSCICHSSL,selmay be the number of PSCICHSs satisfying NPSCICHSMAX,TX and/or PCMAXPSCICHS and/or other restrictive conditions (e.g., including NPSCICHSSL,sel≤NPSCICHSSCH,TX) (e.g., the maximum number of PSCICHSs satisfying NPSCICHSMAX,TX and/or PCMAXPSCICHS and/or the other restrictive conditions, or the number of PSCICHSs satisfying NPSCICHSMAX,TX and/or PCMAXPSCICHS and/or the other restrictive conditions and autonomously selected by the UE).
Optionally, for the first definition of the preferred PSCICHS set, for, i∈{i0p, i1p,. . . , iN
Optionally, for the second definition of the preferred PSCICHS set, for i∈{i0p, i1p,. . . , iN
Optionally, for i∈{0, 1, . . . , NconflictSL,det−1}, j∈{0, 1, . . . , NiSL,det,conflict−1}, the priority value (e.g., denoted as pi,jSCH,TX,PSCICHS) associated with (or “corresponding to”) chsi,jSCH,TX,PSCICHS may be determined according to one of the following methods:
pthreshPSCICHS may be a predefined or configured or pre-configured value, or may be determined by one or more predefined or configured or pre-configured values, and {tilde over (p)}i,jSCH,TX,PSCICHS may be related to one or more among SCIi,0SL,conflict, SCIi,1SL,conflict, . . . , SCIi,N
For example, {tilde over (p)}i,jSCH,TX,PSCICHS may be determined according to one of the following methods:
Wherein
Optionally, for i∈{0, 1, . . . , NconflictSL,det−1}, the priority value (e.g., denoted as piSL,conflict) associated with (or “corresponding to”) the resource conflict c1SL may be related to one or more among pi,0SCH,TX,PSCICHS, pi,1SCH,TX,PSCICHS, . . . , pi,N
Optionally, the set CHSPSCICHSEXC,TX may be equal to a set of all candidate exclusion objects in a reference PSCICHS set (e.g., denoted as a set CHSPSCICHSREF,TX). The set CHSPSCICHSREF,TX may be the set CHSPSCICHSSCH,TX, or the set CHSPSCICHSINC,TX, or the set CHSPSCICHSPRIO,TX. Optionally, if two or more PSCICHSs in the set CHSPSCICHSREF,TX correspond to the same PSCICHS resource (e.g., the same PSCICHS resource rkCI,RES,IDX in the same PSCICHS resource set RIDXCI,RES), all of the two or more PSCICHSs, excluding several (e.g., one) PSCICHSs having the highest priorities, are candidate exclusion objects. Specifically, for example, for CHSPSCICHSREF,TX=CHSPSCICHSSCH,TX, if i0∈{0, 1, . . . , NconflictSL,det−1}, j0∈{0, 1, . . . , Ni
Optionally, in Embodiment 1 of the present invention, for a set A and a set B, “B-A” may represent a set consisting of all elements that relate to the set B but do not relate to the set A.
In this way, according to Embodiment 1, the present invention provides a method, in which a priority is determined for each resource conflict, so as to determine, on the basis of the priority, whether to transmit one or more resource conflict indications triggered by the resource conflict, thereby effectively solving the problem of priority when resource conflict indications triggered by a plurality of resource conflicts are to be transmitted on overlapping time domain resources.
In the present invention, “inter-UE coordination” and other related terms (e.g., “coordination information indication”, “coordination request indication”, “preferred resource indication”, “non-preferred resource indication”, “resource conflict indication”, “sidelink coordination control information”, “physical sidelink coordination information channel/signal”, “physical sidelink coordination request channel/signal”, etc.) may be defined by functions thereof in a system and/or a corresponding procedure and/or corresponding signaling. When applied to a specific system, the terms may be replaced with other names.
Hereinafter,
As shown in
The method and related equipment according to the present invention have been described above in combination with preferred embodiments. It should be understood by those skilled in the art that the method shown above is only exemplary, and the above embodiments can be combined with one another as long as no contradiction arises. The method of the present invention is not limited to the steps or sequences illustrated above. The network node and user equipment shown above may include more modules, for example, modules that may be developed or developed in the future and that may be used for a base station, an Access and Mobility Management Function (AMF), a User Plane Function (UPF), a Mobility Management Entity (MME), a Serving Gateway (S-GW), or a UE. Various identifiers shown above are only exemplary, and are not meant for limiting the present invention. The present invention is not limited to specific information elements serving as examples of these identifiers. A person skilled in the art could make various alterations and modifications according to the teachings of the illustrated embodiments. Those skilled in the art should understand that part or all of the mathematical expressions, mathematical equations, or mathematical inequalities may be simplified or transformed or rewritten to some extent, for example, incorporating constant terms, or interchanging two addition terms, or interchanging two multiplication terms, or moving a term from the left side of an equation or inequality to the right side after changing the plus or minus sign thereof, or moving a term from the right side of an equation or inequality to the left side after changing the plus or minus sign thereof or the like. Mathematical expressions, mathematical equations, or mathematical inequalities before and after the simplification or transformation or rewriting may be considered to be equivalent to each other.
It should be understood that the above-described embodiments of the present invention may be implemented through software, hardware, or a combination of software and hardware. For example, various components of the base station and user equipment in the above embodiments can be implemented by multiple devices, and these devices include, but are not limited to: an analog circuit device, a digital circuit device, a digital signal processing (DSP) circuit, a programmable processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a complex programmable logic device (CPLD), and the like.
In the present invention, the term “base station” may refer to a mobile communication data and/or control switching center having specific transmission power and a specific coverage area and including functions such as resource allocation and scheduling, data reception and transmission, and the like. “User equipment” may refer to a user mobile terminal, for example, including terminal devices that can communicate with a base station or a micro base station wirelessly, such as a mobile phone, a laptop computer, and the like.
In addition, the embodiments of the present invention disclosed herein may be implemented on a computer program product. More specifically, the computer program product is a product provided with a computer-readable medium having computer program logic encoded thereon. When executed on a computing device, the computer program logic provides related operations to implement the above technical solutions of the present invention. When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (the method) described in the embodiments of the present invention. Such setting of the present invention is typically provided as software, codes and/or other data structures provided or encoded on the computer-readable medium, e.g., an optical medium (e.g., compact disc read-only memory (CD-ROM)), a flexible disk or a hard disk and the like, or other media such as firmware or micro codes on one or more read-only memory (ROM) or random access memory (RAM) or programmable read-only memory (PROM) chips, or a downloadable software image, a shared database and the like in one or more modules. Software or firmware or such configuration may be installed on a computing device such that one or more processors in the computing device perform the technical solutions described in the embodiments of the present invention.
In addition, each functional module or each feature of the base station device and terminal device used in each of the above embodiments may be implemented or executed by a circuit, which is usually one or more integrated circuits. Circuits designed to execute various functions described in this description may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs) or general-purpose integrated circuits, field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic, or discrete hardware components, or any combination of the above. The general purpose processor may be a microprocessor, or the processor may be an existing processor, a controller, a microcontroller, or a state machine. The aforementioned general purpose processor or each circuit may be configured by a digital circuit or may be configured by a logic circuit. Furthermore, when advanced technology capable of replacing current integrated circuits emerges due to advances in semiconductor technology, the present invention can also use integrated circuits obtained using this advanced technology.
While the present invention has been illustrated in combination with the preferred embodiments of the present invention, it will be understood by those skilled in the art that various modifications, substitutions, and alterations may be made to the present invention without departing from the spirit and scope of the present invention. Therefore, the present invention should not be limited by the above-described embodiments, but should be defined by the appended claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 20211168893.7 | Sep 2021 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/122603 | 9/29/2022 | WO |
