Auxiliary indication of resource reservation in sidelink

Abstract

The present disclosure relates to assistance indication of resource reservation in sidelink. Techniques discussed herein can facilitate assistance indication of resource reservation in sidelink. One example aspect is a user equipment (UE) comprising: a memory interface; and processing circuitry communicatively coupled to the memory interface and configured to: generate a physical sidelink control channel (PSCCH) message related to a first stage sidelink control information (SCI), wherein the first stage SCI comprises a first indication related to a SCI assistance request; and cause transmission of the first stage SCI.

Description

Technical Field

[0001] This disclosure relates to wireless technologies including New Radio (NR) sidelink communication, which include systems and methods for reserving auxiliary resources in NR sidelink communication. Background Technology

[0002] Generally speaking, sidelink communication refers to a communication mechanism / link between two devices (e.g., two User Equipment (UE)) without traversing a base station (e.g., eNodeB, gNodeB, etc.). An example of sidelink communication is Vehicle-to-Everything (V2X), which refers to Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communication. V2X, V2V, and V2I are wireless technologies designed to enable data exchange between vehicles and their surrounding environment. New Radio (NR) Vehicle-to-Everything V2X is designed to support unicast, multicast, and broadcast communication via sidelinks. V2X communication is sometimes referred to as 5G NR sidelink communication or simply sidelink communication. Attached Figure Description

[0003] Figure 1 This is a block diagram illustrating an exemplary wireless communication system that facilitates side-link (SL) communication according to various aspects described herein.

[0004] Figure 2 This is a signal flow diagram outlining an example of auxiliary resource reservation in a side link (SL) communication link based on the aspects described in this document.

[0005] Figure 3 A resource bitmap is shown, identifying the reserved resources configured by the Tx UE according to the described aspects.

[0006] Figure 4 This is a signaling flowchart outlining an exemplary auxiliary resource reservation in the side link (SL) communication link of a receiving (Rx) UE, indicated by a reservation bit field in the format of Level 2 Side Link Control Information (SCI).

[0007] Figure 5 It is a table used for exemplary Level 2 Side Link Control Information (SCI) format field values ​​and associated Level 2 SCI format or SCI auxiliary indications.

[0008] Figure 6 This is a signal flow diagram outlining an exemplary auxiliary resource reservation in a side link (SL) communication link based on alternative or additional broadcast and feedback mechanisms for the receiving (Rx) UE.

[0009] Figure 7 A flowchart is shown for a method of reserving auxiliary resources in a side link (SL) communication link, wherein the transmission (Tx) UE configures an auxiliary request.

[0010] Figure 8 A flowchart is shown for a method of reserving auxiliary resources in a side link (SL) communication link, wherein the receiving (Rx) UE broadcasts or transmits a side link control information (SCI) message in accordance with an auxiliary request.

[0011] Figure 9 Examples of infrastructure equipment based on the disclosed aspects are shown.

[0012] Figure 10 An example of a UE platform based on the disclosed aspects is shown. Detailed Implementation

[0013] As is widely recognized, the use of personally identifiable information should comply with privacy policies and practices that are generally accepted to meet or exceed industry or governmental requirements for protecting user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of authorized use should be clearly explained to users.

[0014] Sidelink (SL) transmissions play a crucial role in public safety and vehicle-to-everything (V2X) services. Several physical channels and reference signals are defined for New Radio (NR) SL. Some SL-related physical channels include the Physical Sidelink Shared Channel (PSSCH) and the Physical Sidelink Control Channel (PSCCH). In some aspects, Sidelink Control Information (SCI) is included in the PSCCH and / or PSSCH transmitted by the Tx UE for decoding by the Rx UE for channel sensing. In other aspects, the SCI indicates reserved time-frequency resources, demodulation reference signal (DMRS) mode, and antenna port, etc., for transmission.

[0015] In some aspects, the SCI payload / content is divided into two parts or levels: Level 1 SCI and Level 2 SCI. Level 1 SCI is carried by the PSCCH, and Level 2 SCI is carried by the PSSCH. In some aspects, the Level 1 SCI payload / content includes priority information, PSSCH frequency resource allocation, PSSCH time resource allocation, resource reservation period, DMRS mode, Level 2 SCI format, beta_offset indicator, number of DMRS ports, Modulation and Coding Scheme (MCS) table index, and reserved bits. In some aspects, the Level 2 SCI payload / content includes feedback and CSI report data, Tx UE identifier, Rx UE identification, and other resource information.

[0016] When a Tx UE is configured for Mode 2SL communication (direct SL configuration between UEs without base station intervention), one or more PSCCHs carrying Level 1 SCIs and / or PSSCHs carrying Level 2 SCIs may not be received by one or more intended Rx UEs in the Mode 2SL communication group. Intended Rx UEs may not receive PSCCH / PSSCH instant messages from Tx UEs because the intended Rx UEs may have their signaling hidden or unable to receive it due to signal interference, channel congestion, poor service quality, path loss, etc. Therefore, one or more intended Rx UEs may not receive information from Tx UEs that is necessary to establish or maintain sidelink communication. As a result, the reliability of the SL communication link is hampered, and latency increases.

[0017] Various aspects of this disclosure relate to auxiliary indications for resource reservation in sidelink communication links. A mechanism is proposed in which one or more Rx UEs assist a Tx UE in propagating at least one of a Level 1 SCI and a Level 2 SCI to one or more other intended Rx UEs.

[0018] In some aspects, a Tx UE can request and receive assistance from an Rx UE when broadcasting an SCI message that includes at least one of a first-level SCI and a second-level SCI. In this way, an expected Rx UE that has not received SCI signaling from the Tx UE can receive SCI messages from the Rx UE. For example, the Tx UE can transmit a PSCCH that includes a first-level SCI, which includes a first indication related to the SCI assistance request. The Rx UE can respond to the SCI assistance request by broadcasting the first-level SCI, enabling an expected Rx UE that has not received the first-level SCI from the Tx UE to receive the first-level SCI from the Rx UE.

[0019] The first indication can be configured by reusing existing bits in the Level 1 SCI. In one aspect, the Level 1 SCI includes bit fields associated with the format of the Level 2 SCI, and the first indication is configured by setting the bit fields to reserved values. In another aspect, the first indication is configured by mapping the MCS in the Level 1 SCI to a reserved row in the MCS table, or mapping the MCS in the Level 1 SCI to a reserved bit in a higher-level SL table, or mapping the MCS in the Level 1 SCI to an unused code point in the Level 1 SCI. In yet another aspect, the Level 1 SCI is configured according to SCI format 1-A, and the first indication is configured by setting one or more reserved bits of SCI format 1-A to non-zero values. When the Rx UE receives and determines the reserved values ​​in the Level 1 SCI, the Rx UE can configure resources to broadcast or transmit the SCI message.

[0020] In some aspects, an Rx UE that receives a PSCCH will broadcast an SCI message. In other aspects, a subset of Rx UEs that receive a PSCCH will broadcast an SCI message. For example, pre-configured resources may indicate specific channel conditions that trigger an Rx UE to broadcast an SCI signaling message. In another aspect, the indication format of the second-level SCI (e.g., format 2-A, format 2-B, or a new SCI format) may correspond to a communication range threshold condition that the Rx UE should satisfy when broadcasting an SCI message. In yet another aspect, a Tx UE may transmit a second-level SCI with a second indication that indicates one or more Rx UEs to broadcast an SCI signaling message.

[0021] In some aspects, the Level 1 SCI can further indicate one or more reserved resources for the Rx UE to use when broadcasting SCI signaling. The Rx UE can broadcast SCI messages on one or more reserved resources or a remaining subset of one or more reserved resources.

[0022] In another aspect, the Rx UE can perform channel interference measurement after receiving SCI signaling indicating one or more reserved resources. When the Rx UE determines, based on the channel interference measurement, that one or more reserved resources are experiencing poor channel conditions, the Rx UE can identify one or more updated scheduling parameters that differ from the scheduling parameters indicated by the SCI signaling. The Rx UE can then transmit a message including the updated one or more scheduling parameters to the Tx UE.

[0023] Based on the foregoing aspects, one or more Rx UEs assist a Tx UE in broadcasting SCI messages to anticipated Rx UEs that may not yet have received SCI messages from the Tx UE. Therefore, the reliability of the SL communication link is enhanced, and SL communication latency is reduced. Other aspects and details of this disclosure are further described below with reference to the accompanying drawings.

[0024] Auxiliary indications for resource reservation in side links

[0025] Figure 1 This is a block diagram illustrating an exemplary wireless communication system 100 that facilitates side-link (SL) communication according to various aspects described herein.

[0026] In some aspects, the wireless communication system 100 supports SL Channel State Information (CSI) reporting during SL multicast communication. The wireless communication system 100 includes a base station 102 and multiple user equipments (UEs), UE 110, UE 112-1, UE 112-2, and UE 112-N. For the purposes of this specification, UE 110 may be referred to as a transmit (Tx) UE, and UE 112 as a receive (Rx) UE. In other aspects, the wireless communication system 100 may include more or fewer UEs than shown above. In some aspects, the base station (BS) 102 is an eNodeB in an LTE system, a gNodeB in a 5G New Radio (NR) system, or a network device or node associated with any other generation of cellular technology. In some aspects, UE 110 and UE 112 may include mobile phones, tablets, Internet of Things (IoT) devices, vehicle-to-everything (V2X) UEs, etc. In some aspects, UE 110 and UE 112 are configured to communicate with the base station 102 via a communication medium (e.g., air). In some aspects, UE 110 and UE 112 are also configured to communicate with each other via SL (i.e., without going through BS102). In some aspects, UE 110 and UE 112 are configured to use SL communication to perform unicast, multicast, or broadcast communication with other UEs in the wireless communication system 100.

[0027] In SL communication, different resource allocation modes are defined for UE transmission. In Mode 1, the BS allocates resources (e.g., time-frequency resources) for UE SL transmission. In Mode 2, the UE (e.g., Tx UE 110) performs autonomous resource selection (e.g., independent of the BS) for SL transmission.

[0028] To facilitate SL multicast communication, UE 110 and UE 112 are configured to form an SL group. In some aspects, each UE within the SL group has an associated identifier, such as a group member ID. In other aspects, the UEs are configured to form the SL group based on higher-layer signaling (e.g., from BS102). There may be multiple SL groups with wireless communication system 100. In multicast sidelink communication, each UE within the SL group is aware of the other UEs within the SL group, and each UE within the SL group is configured to perform multicast communication (i.e., common transmission) to the UEs within the SL group. Figure 1 In the example, UE 110 is configured to perform multicast communication (e.g., simultaneous transmission) to UE 112. UEs performing SL multicast transmissions within the SL group are referred to herein as Tx UEs, and UEs receiving SL multicast transmissions from Tx UEs within the SL group are referred to herein as Rx UEs. Therefore, each UE within the SL group can be used as either a Tx UE or an Rx UE under different circumstances.

[0029] For ease of reference, UE 110 is referred to as Tx UE 110 below, and UE 112, namely UE 112-1, UE 112-2 and UE 112-N, are referred to as Rx UE 112 below, namely Rx UE 112-1, Rx UE 112-2 and Rx UE112-N respectively.

[0030] In some aspects, Tx UE 110 will communicate with UE 112 based on SL instant message 106. SL instant message 106 can be an SL multicast message, an SL control information (SCI) instant message, etc. In some aspects, Rx UE 112 will communicate with Tx UE 110 based on SL instant message 108. SL instant message 108 can be an acknowledgment (ACK), a negative acknowledgment (NACK), an SL channel state information (CSI) report, etc.

[0031] In some aspects, the SL instant message 106 is transmitted via the Physical Side Link Control Channel (PSCCH) that includes the first-level SCI. In other aspects, the SL instant message 106 is transmitted via the Physical Side Link Shared Channel (PSSCH) that includes the second-level SCI. The first-level SCI may include payload data, control information associated with the PSSCH and the second-level SCI, such as the second-level SCI format, Rx UE identification, propagation type, indication of reserved resources, SCI assistance request, indication of frequency resources (e.g., sub-channels), modulation and coding scheme (MCS) information, and other resource information. The first-level SCI may be transmitted according to SCI format 1-A, a new SCI format, or other suitable formats. The second-level SCI may include payload data, feedback and CSI report data, the identifier of the Tx UE 110, the identification of the Rx UE, and other resource information. The second-level SCI may be transmitted according to SCI format 2-A, SCI format 2-B, or a new format (e.g., SCI format 2-C).

[0032] Figure 2 This is a signal flow diagram 200 that outlines an example of auxiliary resource reservation in a sidelink (SL) communication link. For example, Figure 2 The signaling occurs between Tx UE 110 and Rx UE 112, which are configured for mode 2SL communication, such as... Figure 1As described herein. For the purposes of this specification, the behavior of a single Rx UE 112 may be described, while it is understood that the outlined behavior may also be performed by other Rx UEs. At 202, Tx UE 110 configures a first indication that includes information related to an SCI assistance request to cause another UE to broadcast or transmit an SCI message including one or more of a first-level SCI or a second-level SCI. The first indication is configured in the first-level SCI carried by the PSCCH. The PSCCH may carry control information, including the time / frequency resource indication, MCS, and other information for the second-level SCI. Figure 1 Information described in the document, including Level 1 SCI information according to 3GPP Rel-16, etc.

[0033] The first indication can be configured based on reserved bits, for example, by reusing existing bits in the Level 1 SCI as reserved bits. The Level 1 SCI can be configured according to SCI format 1-A or a new SCI format. In one aspect, the Tx UE 110 configures the first indication by setting at least one reserved bit in the Level 1 SCI to a non-zero value. In another aspect, the Tx UE 110 configures the first indication by mapping the MCS in the Level 1 SCI to a reserved row in the MCS table. For example, the MCS in the Level 1 SCI can be mapped to a reserved row in the MCS index table described in Table 5.1.3-1 of the 3GPP Technical Specification (TS) 38.214, such as rows 29, 30, or 31. In yet another aspect, the Tx UE 110 configures the first indication by mapping the MCS to one or more reserved bits in a higher-level SL table or one or more unused code points in the Level 1 SCI.

[0034] At position 204, Tx UE 110 can configure one or more reserved resources indicated by the first-level SCI. The reserved resources may correspond to one or more of the time / frequency resources, time slots / symbols, or channels used by Rx UE 112 to broadcast SCI messages corresponding to the first indication. Figure 3 The reserved resources will be discussed further below. It should be noted that Rx UE 112 can broadcast SCI messages on resources selected by the Rx UE without requiring Tx UE 110 to configure reserved resources for broadcasting SCI messages.

[0035] At position 206, Tx UE 110 transmits a PSCCH message carrying a first-level SCI including a first indication and optionally reserved resources. In some cases (e.g., poor channel conditions), not all Rx UEs 112 can receive the PSCCH instant message from Tx UE 110. The Rx UE 112 that receives the PSCCH decodes the PSCCH message and identifies the first-level SCI including the first indication related to the SCI assistance request. If the first-level SCI indicates reserved resources, the Rx UE 112 can further identify the reserved resources. The Rx UE can identify the first indication based on the mapping from the MCS to reserved lines or unused code points, or based on another reserved bit, where the reserved bit of the first-level SCI is set to a non-zero value.

[0036] At point 208, Tx UE 110 can configure a second indication in the second-level SCI carried by the PSSCH message. The second indication can specify which Rx UE 112 should be used as a secondary UE via broadcast SCI messages. Tx UE 110 can designate all Rx UE 112 as secondary UEs based on the cell ID, a subset of Rx UE 112 as secondary UEs, or certain Rx UE 112 as secondary UEs, or can designate the secondary UE based on channel conditions or communication range between Tx UE 110 and Rx UE 112. In some aspects, Tx UE 110 indicates the secondary UE via the second indication. In other aspects, Tx UE 110 does not indicate the secondary UE but pre-configures it. In this example, the secondary UE can be pre-configured as all Rx UE 112, a subset of Rx UE 112, or pre-configured based on channel conditions.

[0037] At 210, Tx UE 110 transmits a PSSCH message carrying a Level 2 SCI, which may include a Level 2 indicator if configured. In some cases (e.g., poor channel conditions), not all Rx UE 112 can receive the PSSCH instant message from Tx UE 110. The Rx UE 112 receiving the PSSCH message decodes the PSSCH message and identifies the Level 2 SCI and the Level 2 indicator (if the Level 2 indicator is configured).

[0038] At 212, after receiving at least a PSCCH message, Rx UE 112 broadcasts or transmits an SCI message as indicated by the first indication. Furthermore, Rx UE 112 may broadcast or transmit a second-level SCI. For example, Rx UE 112-1 and Rx UE 112-2 broadcast or transmit SCI messages, and Rx UE 112-N, which has not received a PSCCH / PSSCH immediate message from Tx UE 110, may receive an SCI message from one or more of Rx UE 112-1 or Rx UE 112-2. In some aspects, Rx UE 112 broadcasts or transmits SCI messages based on reserved resources configured by Tx UE 110 and identified in the PSCCH message at 206. Depending on timing and delay constraints, Rx UE 112 may broadcast or transmit SCI messages based on a remaining subset of one or more reserved resources. In other respects, Rx UE 112 broadcasts or transmits SCI messages based on pre-configured resources or another resource scheme.

[0039] In some aspects, Rx UE 112 broadcasts or transmits an SCI message at 212 after receiving the PSCCH message at 206 and before receiving the PSSCH message at 210 (not shown). In this aspect, Rx UE 112 may broadcast or transmit a first-level SCI message before Tx UE 110 transmits the PSSCH message. Optionally, if a first indication indicates an SCI auxiliary associated with both the first-level and second-level SCI messages, Rx UE 112 may subsequently broadcast or transmit a second-level SCI message after receiving the PSSCH message.

[0040] Rx UE 112 broadcasting Level 1 SCI means that an Rx UE that has not received an SCI message from Tx UE 110 can receive an SCI message from one or more Rx UE 112s. Therefore, the reliability of the SL communication link is enhanced and the SL communication latency is reduced.

[0041] Figure 3 A resource bitmap 300 is shown that identifies the reserved resource 302 configured by the Tx UE 110. The Tx UE 110 can, for example, in the resource bitmap 300... Figure 2 Reserved resource 302 is configured at position 204. Reserved resource 302 can be configured based on time / frequency resources, time slots / symbols, or channels. Reserved resource 302 can instruct Rx UE 112 to, for example... Figure 2The resources to be used when transmitting SCI messages at point 212. Tx UE 110 can configure reserved resources 302 according to pre-configured mappings, channel measurements measured by Tx UE 110, channel measurements measured by Rx UE 112, etc. Tx UE 110 can configure reserved resources 302 according to resource allocation with the best known signal quality indicators. Therefore, when the auxiliary Rx UE 112 broadcasts or transmits SCI messages according to reserved resources 302, the resources with the least interference are used, so that any hidden Rx UE or Rx UE 112 that does not receive SCI messages from Tx UE 110 can receive SCI messages from the auxiliary Rx UE 112.

[0042] Figure 4 This is a signaling flow diagram 400 outlining an example of secondary resource reservation in side-link (SL) communication. In this example, Rx UE 112, indicated by the reservation bit field in the second-level SCI format, will broadcast an SCI message. Signaling flow diagram 400 describes configuring the first indication at 202, configuring... Figure 2 The second instruction at point 208 and the additional or alternative operations for unicast PSCCH / PSSCH instant messages.

[0043] Tx UE 110 configures a first indication at 402, including information related to the SCI assistance request. This first indication is configured in a first-level SCI carried by the PSSCH. The first-level SCI may include bit fields associated with the format field values ​​of the second-level SCI, and the first indication can be configured by setting the bit fields to reserved values. Figure 5 The discussion further examines the second-level SCI format field values.

[0044] Tx UE 110 can configure a second indication at 404 in the Level 2 SCI carried by the PSSCH message. The second indication can indicate which of the Rx UEs 112 will broadcast the SCI message to assist in broadcasting the SCI message. For example, the second indication can specify the criteria that the Rx UE can evaluate to determine whether to broadcast the SCI message. Because the bit fields associated with the format field values ​​of the Level 2 SCI are used for the first indication, rather than indicating a specific Level 2 SCI format (e.g., SCI format 2-A, SCI format 2-B, or a new SCI format), Rx UE 112 can autonomously configure itself to the SCI format when it recognizes reserved values ​​in the bit fields.

[0045] In one aspect, Rx UE 112 can be configured or pre-configured to SCI format 2-B. Therefore, the Rx UE receives and decodes the second-level SCI according to SCI format 2-B, and a second indication identified in the second-level SCI can indicate a communication range threshold. Thus, Rx UE 112 that meets the communication range threshold is an auxiliary UE that can broadcast or transmit SCI messages at 212. In some examples, the second indication further indicates that the auxiliary UE does not need to signal Hybrid Automatic Repeat Request (HARQ) or Acknowledgment (ACK) feedback messages. The communication range threshold can be based on the channel quality between Rx UE 112 and Tx UE 110. This channel quality can correspond to path loss, Reference Signal Received Power (RSRP), Signal-to-Noise Ratio (SNR), Signal-to-Interference Plus Noise Ratio (SINR), Bit Error Rate (BER), etc. Rx UE 112 can perform communication range measurements to determine its status relative to the communication range.

[0046] In one example, the second indication indicates that Rx UE 112 has a communication range less than or equal to the communication range threshold, Rx UE 112 will be used as a secondary UE and should broadcast or transmit SCI messages at 212. In this example, Rx UE 112 "closer" to Tx UE 110 (e.g., within communication range) is used as a secondary UE, while Rx UE 112 "farther" from Tx UE 110 (e.g., outside communication range) is not used as a secondary UE.

[0047] In another example, the second indication indicates that Rx UE 112 has a communication range greater than the communication range threshold, Rx UE 112 will be used as a secondary UE and should broadcast or transmit SCI messages at 212. In this example, Rx UE 112 "further away" from Tx UE 110 (e.g., beyond the communication range) is used as a secondary UE, while Rx UE 112 "closer" to Tx UE 110 (e.g., within the communication range) is not used as a secondary UE. It should be understood that Tx UE 110 can be configured according to... Figure 2 The communication range threshold at point 208 is used to configure the second indication.

[0048] In another aspect, Rx UE 112 can be configured or pre-configured to SCI format 2-A. Tx UE 110 can configure a second indication at 404 by configuring a propagation type indicator to indicate a unicast instant message. Therefore, Rx UE 112 receives and decodes the second-level SCI according to SCI format 2-A, and the second indication can indicate which Rx UE 112 is the secondary UE. The second indication can identify a subset of Rx UE 112, all Rx UE 112, or a specific UE as the secondary UE based on the cell ID. Furthermore, other propagation types (e.g., multicast, broadcast) can be used to configure the second indication and can further indicate which Rx UE 112 is the secondary UE. It should be recognized that Tx UE 110 can be configured according to... Figure 2 The unicast instant message described at point 208 is used to configure the second instruction.

[0049] In some aspects, after the auxiliary UE broadcasts or transmits an SCI message, Tx UE 110 may transmit a unicast PSCCH / PSSCH instant message to one of Rx UE 112 at point 406. In one aspect, Tx UE 110 may configure reserved resources in the first-level SCI as described at point 204. Since the auxiliary UE will broadcast or transmit an SCI message based on the reserved resources transmitted by the first-level SCI, Tx UE 110 knows when to schedule the reserved resources. Therefore, Tx UE 110 may transmit unicast PSCCH / PSSCH instant information after utilizing the reserved resources, and one or more desired channels for transmission are idle. It should be understood that Tx UE 110 may broadcast or transmit on Rx UE 112 Figure 2 After the SCI message at position 212, unicast PSCCH / PSSCH is transmitted.

[0050] Figure 5 Table 500 is used for exemplary Level 2 SCI format field values ​​and associated Level 2 SCI format or SCI auxiliary indications. Table 500 shows that Level 2 SCI format field value 00 (hereinafter referred to as field value) corresponds to SCI format 2-A of Level 2 SCI, and field value 01 corresponds to SCI format 2-B. Field values ​​10 and 11 may correspond to reserved SCI formats (e.g., new SCI formats), reserved values, or first indications corresponding to SCI auxiliary. Therefore, the first indication can be configured by Tx UE 110 by configuring field values ​​to 10 or 11.

[0051] Figure 6 This is a signaling flow diagram 600 outlining an exemplary auxiliary resource reservation in side-link (SL) communication, which includes alternative or additional broadcast and feedback mechanisms from Rx UE 112. Signaling flow diagram 600 describes in... Figure 2 and Figure 4212 broadcast SCI messages and additional or alternative operations for updating the scheduling parameters of configured reserved resources.

[0052] After Rx UE 112 receives the first-level SCI at 206 and identifies reserved resources, Rx UE 112 can determine one or more updated scheduling parameters. In some aspects, Rx UE 112 determines one or more updated scheduling parameters based on unicast SL communication with Tx UE 110. Other propagation types (e.g., multicast and broadcast) may correspond to more than one Rx UE 112 that determines one or more updated scheduling parameters. In one aspect, Rx UE 112 can perform channel measurements, including channel interference measurements corresponding to the reserved resources at 602. Channel measurements can be performed before or after receiving the first-level SCI at 206. Rx UE 112 can determine, for example, based on channel measurements according to a channel quality threshold, that one or more reserved resources are experiencing poor channel conditions. Rx UE 112 can identify one or more updated scheduling parameters that differ from the scheduling parameters indicated by the first-level SCI. Rx UE 112 can transmit a message indicating updated scheduling parameters to Tx UE 110 at position 604.

[0053] In response to receiving updated scheduling parameters, Tx UE 110 may transmit an ACK, NACK, or indication of new reserved resources to Rx UE 112 at 606. For example, Tx UE 110 may transmit an ACK indicating that reserved resources have been updated based on updated scheduling parameters identified by Rx UE 112. Alternatively, Tx UE 110 may transmit a NACK indicating that the updated scheduling parameters are ignored and the initially indicated reserved resources transmitted at 206 will be used by Rx UE 112. Alternatively, Tx UE 110 may determine new reserved resources based on one or more of the updated scheduling parameters, scheduling parameters received from multiple Rx UE 112, or additional measurements performed by Tx UE 110. It should be understood that the actions described at 602, 604, and 606 can be broadcast. Figure 2 or Figure 4 It occurred before the SCI message at position 212.

[0054] In some aspects, Rx UE 112 can recognize the PSSCH-based Format 1-A configuration included in the Level 1 SCI and broadcast the Level 1 SCI at 608 according to the PSSCH-based Format 1-A configuration. Furthermore, the PSSCH can be based on 3GPP Release 16 (Rel-16) or an alternative to the SCI Format 1-A described in the 3GPP release.

[0055] In other aspects, the first indication identified by Rx UE 112 indicates an SCI auxiliary request associated with both the first-level SCI and the second-level SCI. Therefore, Rx UE 112 can transmit both the first-level SCI and the second-level SCI at 610. In one aspect, Rx UE 112 can also transmit an additional auxiliary request corresponding to the first indication identified at 206. In another aspect, Rx UE 112 transmits at 610 an additional auxiliary request corresponding to the first indication identified at 206, indicating both the first-level SCI and the second-level SCI. The additional auxiliary request indicates that one or more Rx UEs 112 will broadcast an SCI message according to the first indication. Therefore, for any hidden Rx UE or Rx UE 112 that has not received an SCI message from Tx UE 110, there is another opportunity to receive an SCI message from the auxiliary Rx UE 112. It should be understood that the action described at 609 can be used as... Figure 2 or Figure 4 This occurred as part of 212 broadcast SCI messages.

[0056] In some aspects, the actions described at 602 to 610 involving broadcasting or transmitting SCI messages in Rx UE 112 can be broadcast or transmitted based on reserved resources as described herein or one or more remaining reserved resources or updated / new reserved resources.

[0057] Figure 7 A flowchart of an exemplary method 700 for secondary resource reservation in an SL communication link is shown, wherein the TxUE configures a secondary request. Method 700 can be, for example, by... Figure 2 , Figure 4 or Figure 6 The Tx UE 110 is used to execute this.

[0058] At 702, the method includes configuring a first indication that includes information related to an SCI assistance request broadcast or transmitted by another UE. The first indication is configured according to a first-level SCI. Figure 2 At point 202, Figure 4 At 402, and Figure 6 At position 202, some aspects of action 702 are corresponding.

[0059] At 704, the method includes optionally configuring reserved resources for another UE to broadcast or transmit SCI messages. Figure 2 At position 204, Figure 4 At position 204, and Figure 6 At position 204, there are some aspects corresponding to action 704.

[0060] At 706, the method includes transmitting a PSCCH message carrying a first-level SCI and optionally reserved resources. Figure 2 At position 206, Figure 4 At position 206, and Figure 6 At position 206, there are some aspects of action 706.

[0061] At 708, the method includes optionally configuring a second indication that one or more other UEs will broadcast SCI signaling. Figure 2 At point 208, Figure 4 At 404, and Figure 6 At position 209, there are some aspects corresponding to action 708.

[0062] At 710, the method includes transmitting a PSSCH message carrying a second-level SCI, which may optionally include a second-level indication. Figure 2 At 210, Figure 4 At 210, and Figure 6 At position 210, some aspects of action 710 are corresponding.

[0063] At 712, the method includes optionally receiving updated scheduling parameters corresponding to the reserved resources at 704. The method may optionally include transmitting an ACK, NACK, or the updated reserved resources in response to receiving the updated scheduling parameters. Figure 6 At 604 and Figure 6 At position 606, there are some aspects corresponding to action 712.

[0064] At 714, the method includes optionally transmitting unicast or other propagation type PSCCH / PSSCH messages. Figure 4 At position 406, there are some aspects of action 714.

[0065] Figure 8 A flowchart of a method 800 for secondary resource reservation in an SL communication link is shown, in which the Rx UE broadcasts or transmits an SCI message based on a secondary request. Method 800 can be, for example, by... Figure 1 , Figure 2 , Figure 4 or Figure 6 One or more Rx UE112s are used to execute this.

[0066] At 802, the method includes receiving a PSCCH message that includes a first-level SCI. Figure 2 At position 206, Figure 4 At 406, and Figure 6 At position 206, some aspects of action 802 are corresponding.

[0067] At 804, the method includes identifying a first indication, which includes an SCI assistance request for broadcasting or transmitting an SCI message. Figure 2At position 206, Figure 4 At 406, and Figure 6 At position 206, some aspects of action 804 are corresponding.

[0068] At 806, the method includes optionally identifying a reserved resource in the first-level SCI to broadcast or transmit SCI messages based on that reserved resource. Figure 2 At position 206, Figure 4 At 406, and Figure 6 At position 206, there are some aspects corresponding to action 806.

[0069] At 808, the method includes receiving a PSCCH message that includes a second-level SCI. Figure 2 At 210, Figure 4 At 210, and Figure 6 At position 210, some aspects of action 808 are corresponding.

[0070] At 810, the method includes optionally identifying a second indication included in the second-level SCI, which indicates one or more other UEs that will broadcast SCI signaling. Figure 2 At 210, Figure 4 At 210, and Figure 6 At position 210, some aspects of action 810 are corresponding.

[0071] At 812, the method includes optionally performing a channel measurement and updating scheduling parameters corresponding to the reserved resources at 806 based on the channel measurement, as well as transmitting the updated scheduling parameters. The method further includes optionally receiving an ACK, NACK, or the updated reserved resources in response to the transmitted updated scheduling parameters. Figure 6 Positions 602, 604, and 606 correspond to some aspects of action 812.

[0072] At 814, the method includes broadcasting or transmitting an SCI message according to a first instruction. Figure 2 At position 212, Figure 4 At 212, and Figure 6 At positions 608 and 610, some aspects of action 814 are corresponding.

[0073] At 816, the method includes optionally transmitting an additional auxiliary request for one or more Rx UEs to broadcast an SCI message in accordance with a first instruction. Figure 6 At position 610, there are some aspects corresponding to action 816.

[0074] At 818, the method includes optionally receiving unicast or other propagation type PSCCH / PSSCH messages. Figure 4 At position 406, some aspects of action 818 are represented.

[0075] Figure 9 Examples of infrastructure equipment 900 according to various aspects are shown. Infrastructure equipment 900 (or "system 900") can be implemented as a base station, a radio head unit, a RAN node (such as...) Figure 1 (BS102) and / or any other element / device discussed herein. In other examples, system 900 may be implemented in or by a UE such as Tx UE 110 or Rx UE 112.

[0076] System 900 includes application circuitry 905, baseband circuitry 910, one or more radio front-end modules (RFEMs) 915, memory circuitry 920 (including a memory interface), power management integrated circuit (PMIC) 925, power tee circuitry 930, network controller circuitry 935, network interface connector 940, satellite positioning circuitry 945, and user interface 950. In some aspects, system 900 may include additional components such as, for example, memory / storage devices, displays, cameras, sensors, or input / output (I / O) interfaces. In other aspects, the following components may be included in more than one device. For example, the circuitry may be individually included in more than one device for CRAN, vBBU, or other similar implementations.

[0077] Application circuitry 905 includes circuitry such as, but not limited to, one or more processors (or processor cores), processing circuitry, cache memory, and one or more of the following: a low-dropout regulator (LDO), an interrupt controller, a serial interface such as SPI, I2C, or a universal programmable serial interface module, a real-time clock (RTC), a timer-counter (including interval timers and watchdog timers), a general-purpose input / output (I / O or IO), a memory card controller such as a Secure Digital (SD) Multimedia Card (MMC) or similar, a Universal Serial Bus (USB) interface, a Mobile Industry Processor Interface (MIPI) interface, and a Joint Test Access Group (JTAG) test access port. The processor (or core) of application circuitry 905 may be coupled to or may include memory / storage elements, and may be configured to execute instructions stored in the memory / storage elements to enable various applications or operating systems to run on system 900. In some specific implementations, the memory / storage element may be an on-chip memory circuit, which may include any suitable volatile and / or non-volatile memory, such as DRAM, SRAM, EPROM, EEPROM, flash memory, solid-state memory and / or any other type of memory device technology, such as those discussed herein.

[0078] The processor of application circuit 905 may include, for example, one or more processor cores (CPUs), one or more application processors, one or more graphics processing units (GPUs), one or more Reduced Instruction Set Computing (RISC) processors, one or more Acorn RISC machine (ARM) processors, one or more Complex Instruction Set Computing (CISC) processors, one or more digital signal processors (DSPs), one or more FPGAs, one or more PLDs, one or more ASICs, one or more microprocessors or controllers, or any suitable combination thereof. In some aspects, application circuit 905 may include or may be a dedicated processor / controller for operation according to various aspects of this document. As an example, the processor of application circuit 905 may include one or more processor, Processor; Advanced Micro Devices (AMD) Processor, Accelerated Processing Unit (APU) or Processors; ARM-based processors licensed by ARM Holdings, Ltd., such as the ARM Cortex-A series processors provided by Cavium™, Inc. MIPS-based designs from MIPS Technologies, Inc., such as the MIPS Warrior P-class processor; etc. In some aspects, System 900 may not utilize Application Circuitry 905 and may instead include a dedicated processor / controller to process, for example, IP data received from EPC or 5GC.

[0079] User interface circuitry 950 may include one or more user interfaces designed to enable a user to interact with system 900, or peripheral interface designed to enable peripheral components to interact with system 900. User interfaces may include, but are not limited to, one or more physical or virtual buttons (e.g., a reset button), one or more indicators (e.g., light-emitting diodes (LEDs)), a physical keyboard or keypad, a mouse, a touchpad, a touchscreen, a speaker or other audio transmitter, a microphone, a printer, a scanner, headphones, a display screen or display device, etc. Peripheral interface may include, but is not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, a power interface, etc.

[0080] Figure 9The components shown can communicate with each other using interconnected interface circuitry, which can include any number of bus and / or interconnect (IX) technologies, such as Industry Standard Architecture (ISA), Extended ISA (EISA), Peripheral Component Interconnect (PCI), Peripheral Component Interconnect Extended (PCIx), PCI Express (PCIe), or any number of other technologies. The bus / IX can be a proprietary bus, for example, used in a SoC-based system. Other bus / IX systems can be included, such as I2C interfaces, SPI interfaces, point-to-point interfaces, and power buses, etc.

[0081] Figure 10 An example of platform 1000 (or "device 1000") according to various aspects is shown. In these aspects, computer platform 1000 may be adapted to be used as... Figure 1 The Tx UE 110, Rx UE 112, and / or any other element / device discussed herein. Platform 1000 may include any combination of the components shown in the examples. Components of platform 1000 may be implemented as integrated circuits (ICs), portions of ICs, discrete electronic devices, or other modules, logic, hardware, software, firmware, or combinations thereof adapted in computer platform 1000, or may be implemented as components otherwise integrated within the chassis of a larger system. Figure 10 The block diagram is intended to show a high-level view of the components of the computer platform 1000. However, some of the components shown may be omitted, additional components may be present, and different arrangements of the components shown may occur in other specific embodiments.

[0082] Application circuitry 1005 includes circuitry such as, but not limited to, one or more processors (or processor cores), cache memory, and one or more of the following: LDO, interrupt controller, serial interface (such as SPI), I2C or general programmable serial interface module, RTC, timer-counter (including interval timers and watchdog timers), general-purpose I / O, memory card controller (such as SDMMC or similar controller), USB interface, MIPI interface, and JTAG test access port. The processor (or core) of application circuitry 1005 may be coupled to or may include memory / storage elements, and may be configured to execute instructions stored in the memory / storage device to enable various applications or operating systems to run on system 1000. In some specific implementations, the memory / storage element may be on-chip memory circuitry that may include any suitable volatile and / or non-volatile memory, such as DRAM, SRAM, EPROM, EEPROM, flash memory, solid-state memory, and / or any other type of memory device technology, such as those discussed herein.

[0083] For example, the processor of application circuit 1005 may include a general-purpose or special-purpose processor, such as one purchased from [unclear - possibly a specific brand or manufacturer]. Inc., Cupertino, CA's A-series processors (e.g., the A13 Bionic) or any other such processor. The processor in application circuit 1005 may also be one or more of the following: Advanced Micro Devices (AMD). Processor or Accelerated Processing Unit (APU); from Inc.'s kernel processor, from Snapdragon by Technologies, Inc. TM Processor, Texas Instruments Open Multimedia ApplicationsPlatform(OMAP) TM Processors; MIPS-based designs from MIPS Technologies, Inc., such as the MIPS Warrior M-class, Warrior I-class, and Warrior P-class processors; ARM-based designs licensed from ARM Holdings, Ltd., such as the ARM Cortex-A, Cortex-R, and Cortex-M series processors; etc. In some specific implementations, the application circuit 1005 may be part of a system-on-a-chip (SoC), where the application circuit 1005 and other components are formed as a single integrated circuit or a single package.

[0084] The baseband circuit or processor 1010 can be implemented, for example, as a soldered substrate, which includes one or more integrated circuits, a single-package integrated circuit soldered to a main circuit board, or a multi-chip module containing two or more integrated circuits. Furthermore, the baseband circuit or processor 1010 can enable the transfer of various resources.

[0085] Platform 1000 may also include interface circuitry (not shown) for connecting external devices to platform 1000. The interface circuitry can communicatively couple one interface to another. External devices connected to platform 1000 via the interface circuitry include sensor circuitry 1021 and electromechanical components (EMC) 1022, as well as a removable memory device coupled to removable memory circuitry 1023.

[0086] Battery 1030 can power platform 1000, but in some examples, platform 1000 may be mounted in a fixed location and may have a power source coupled to the grid. Battery 1030 may be a lithium-ion battery, a metal-air battery such as a zinc-air battery, an aluminum-air battery, a lithium-air battery, etc. In some specific implementations, such as in V2X applications, battery 1030 may be a typical lead-acid automotive battery.

[0087] Although the method has been shown and described above as a series of actions or events, it should be understood that the order of such actions or events shown should not be construed as limiting. For example, some actions may occur in a different order and / or simultaneously with other actions or events besides those shown and / or described herein. Furthermore, not all of the shown actions may be required to implement one or more aspects or embodiments disclosed herein. Additionally, one or more of the actions shown herein may be performed in one or more separate actions and / or stages. In some embodiments, the method shown above can be implemented in a computer-readable medium using instructions stored in memory. Many other embodiments and variations are possible within the scope of this disclosure protected by the claims.

[0088] As used herein, the term "processor" can refer to virtually any computing processing unit or device, including but not limited to single-core processors; single-core processors with software multithreading capabilities; multi-core processors; multi-core processors with software multithreading capabilities; multi-core processors with hardware multithreading technology; parallel platforms; and parallel platforms with distributed shared memory. Additionally, a processor can refer to an integrated circuit, application-specific integrated circuit, digital signal processor, field-programmable gate array, programmable logic controller, complex programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions and / or processes described herein. Processors can utilize nanoscale architectures, such as, but not limited to, molecular and quantum dot-based transistors, switches, and gates, to optimize space utilization or enhance the performance of mobile devices. Processors can also be implemented as a combination of computing processing units.

[0089] An embodiment (aspect) may include subjects such as methods, means for performing actions or blocks of the method, at least one machine-readable medium including instructions that, when executed by a machine (e.g., a processor with memory, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), etc.), cause the machine to perform actions of a method, apparatus, or system for concurrent communication using various communication technologies according to the aspects and embodiments described herein.

[0090] Example 1 is a user equipment (UE) including: a memory interface; and

[0091] The processing circuitry is communicatively coupled to the memory interface and configured to: generate a Physical Side Link Control Channel (PSCCH) message associated with Level 1 Side Link Control Information (SCI), wherein the Level 1 SCI includes a first indication associated with an SCI assistance request; and induce the transmission of the Level 1 SCI.

[0092] Example 2 includes the subject matter of Example 1, wherein the processing circuitry is further configured to configure the first indication by mapping the modulation and coding scheme (MCS) in the first-level SCI to one of the reserved rows of the MCS table, one or more reserved bits of the sidelink table, or one or more unused code points.

[0093] Example 3 includes the subject of Example 1, wherein the first-level SCI is configured according to SCI format 1-A, and the first instruction is configured by setting one or more reserved bits of the SCI format 1-A to non-zero values.

[0094] Example 4 includes the subject of Example 1, wherein the first-level SCI includes a bit field associated with the format of the second-level SCI, and the first indication is configured by setting the bit field to a reserved value.

[0095] Example 5 includes the subject of Example 1, wherein the first-level SCI indicates one or more reserved resources, and the one or more reserved resources indicate one or more auxiliary UEs to transmit the first-level SCI according to the one or more reserved resources.

[0096] Example 6 includes the subject of Example 1, wherein the first-level SCI indicates format 2-B for the second-level SCI, and the processing circuitry is further configured to generate a Physical Side Link Shared Channel (PSSCH) message including the second-level SCI, wherein the second-level SCI includes a second indication instructing one or more auxiliary UEs to transmit the first-level SCI.

[0097] Example 7 includes the subject matter of Example 1, which is further configured to: configure the second indication based on a communication range threshold, wherein the communication range threshold is based on the channel quality between the receiving (Rx) UE and the UE.

[0098] Example 8 includes the subject matter of Example 7, wherein the second indication indicates that: when the Rx UE has a communication range less than or equal to the communication range threshold, the Rx UE will transmit the first level SCI, or when the Rx UE has a communication range greater than the communication range threshold, the Rx UE will transmit the first level SCI.

[0099] Example 9 includes the subject of Example 1, wherein the first-level SCI further indicates the second-level SCI format according to format 2-A, and the processing circuit is further configured to: generate a Physical Side Link Shared Channel (PSSCH) message including the second-level SCI, wherein the second-level SCI includes a second indication indicating one or more auxiliary UEs to transmit the first-level SCI; and configure the second indication to indicate a unicast instant message by configuring a propagation type indicator.

[0100] Example 9 includes the subject of Example 1, wherein the first-level SCI further indicates the second-level SCI format according to format 2-A, and the processing circuit is further configured to: generate a Physical Side Link Shared Channel (PSSCH) message including the second-level SCI, wherein the second-level SCI includes a second indication indicating one or more auxiliary UEs to transmit the first-level SCI; and configure the second indication to indicate a unicast instant message by configuring a propagation type indicator.

[0101] Example 10 includes the subject matter of Example 1, wherein the first-level SCI further indicates one or more reserved resources and one or more scheduling parameters, and the processing circuitry is further configured to receive one or more scheduling parameters for updating the one or more reserved resources.

[0102] Example 11 is a user equipment (UE) including: a memory interface; and processing circuitry communicatively coupled to the memory interface and configured to: receive a physical sidelink control channel (PSCCH) message including first-level sidelink control information (SCI); identify a first indication related to an SCI assistance request in the first-level SCI; and, in response to the PSCCH message, cause the first-level SCI to be transmitted to one or more other UEs.

[0103] Example 12 includes the subject matter of Example 11, wherein the first-level SCI indication includes one or more reserved resources of one or more scheduling parameters, and the processing circuitry is further configured to: perform channel interference measurement; determine one or more updated scheduling parameters that are different from the one or more scheduling parameters based on the channel interference measurement; and generate a message including the updated one or more scheduling parameters.

[0104] Example 13 includes the subject matter of Example 11, and is further configured to receive a Physical Side Link Shared Channel (PSSCH) message including a second-level SCI, wherein the second-level SCI includes a second indication instructing one or more auxiliary UEs to transmit the first-level SCI.

[0105] Example 14 includes the subject of Example 11, identifying a PSCCH-based Format 1-A configuration included in the first-level SCI; and initiating the transmission of the first-level SCI according to the PSCCH-based Format 1-A configuration.

[0106] Example 15 includes the subject matter of Example 11, further configured to: receive a second-level SCI; and cause the transmission of the second-level SCI according to the first instruction, wherein the transmission of the first-level SCI and the second-level SCI indicates an SCI assistance request identified in the first instruction.

[0107] Example 16 includes the subject matter of Example 11, further configured to: receive a Physical Side Link Shared Channel (PSSCH) message including a second-level SCI; identify in the second-level SCI a second indication including a communication range threshold, wherein the communication range threshold is related to the channel quality between the UE and the Tx UE; perform a communication range measurement; determine, based on the communication range measurement, that the UE meets the communication range threshold; and, in response to meeting the communication range threshold, cause the first-level SCI to be transmitted to one or more other UEs.

[0108] Example 17 includes the subject matter of Example 11, further configured to: identify SCI format 1-A included in the first-level SCI; and wherein the first indication is identified by one or more reserved bits of the SCI format 1-A having non-zero values.

[0109] Example 18 includes the subject matter of Example 11, further configured to: identify one or more reserved resources included in the first-level SCI; and transmit the first-level SCI according to the one or more reserved resources.

[0110] Example 19 is a baseband processor configured to generate first-level sidelink control information (SCI), wherein the first-level SCI includes a first indication associated with an SCI assistance request, wherein the first indication instructs the UE to transmit the first-level SCI.

[0111] Example 20 includes the subject of Example 19, wherein the first indication is configured by a reserved value in the first-level SCI.

[0112] A user equipment configured to perform any action or combination of actions as substantially described herein, including in embodiments 1 to 20 and in specific embodiments included in the user equipment.

[0113] A network node configured to perform any action or combination of actions as substantially described herein, including in embodiments 1 to 20 and in the specific implementations included in the network node.

[0114] A non-volatile or non-transitory computer-readable medium storing instructions that, when executed, cause to perform any action or combination of actions as substantially described herein, including in embodiments 1 to 20 and specific implementations.

[0115] A method, which is substantially described herein with reference to each or any combination thereof included in Examples 1 to 20 and in the specific embodiments.

[0116] A wireless device configured to perform any action or combination of actions as substantially described herein, including in embodiments 1 to 20 and in network nodes.

[0117] An integrated circuit configured to perform any action or combination of actions as substantially described herein, including in embodiments 1 to 20 and in network nodes.

[0118] Furthermore, standard programming and / or engineering techniques can be used to implement the various aspects or features described herein as methods, apparatus, or articles of art. As used herein, the term "article of art" is intended to cover a computer program accessible from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but is not limited to, magnetic storage devices (e.g., hard disks, floppy disks, magnetic stripes), optical discs (e.g., high-density disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., EPROMs, cards, sticks, key drives, etc.). Additionally, the various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data. Furthermore, a computer program product may include a computer-readable medium having one or more instructions or codes that are operable to cause a computer to perform the functions described herein.

[0119] Communication media embody computer-readable instructions, data structures, program modules, or other structured or unstructured data in data signals such as modulated data signals, such as carrier waves or other transmission mechanisms, and include any information delivery or transmission medium. The term "modulated data signal" or signal refers to a signal whose one or more characteristics are set or altered in a manner that encodes information in one or more signals. By way of example, and not limitation, communication media include wired media such as wired networks or direct wired connections, and wireless media such as acoustic, RF, infrared, and other wireless media.

[0120] An exemplary storage medium can be coupled to a processor, enabling the processor to read information from and write information to the storage medium. Alternatively, the storage medium can be integrated with the processor. Furthermore, in some aspects, the processor and storage medium can reside in an ASIC. Additionally, the ASIC can reside in a user terminal or device.

[0121] In this regard, although the subject matter disclosed herein has been described in conjunction with various aspects and corresponding drawings, it should be understood that other similar aspects may be used, or modifications and additions may be made to the described aspects, to perform the same, similar, alternative, or substitute functions of the disclosed subject matter without departing from the described aspects. Therefore, the disclosed subject matter should not be limited to any single aspect described herein, but should be interpreted in accordance with the breadth and scope of the following appended claims.

[0122] In particular, regarding the various functions performed by the aforementioned components (components, devices, circuits, systems, etc.), unless otherwise stated, the terminology used to describe such components (including references to "means") is intended to correspond to any component or structure that performs the specified function of the said component (e.g., functionally equivalent), even if it is not structurally equivalent to the disclosed structure that performs the function in the exemplary embodiments of this disclosure shown herein. Furthermore, while certain features have been disclosed with respect to only one of several embodiments, it may be desirable and advantageous for any given or particular application to combine such features with one or more other features of other embodiments.

[0123] This disclosure is now described with reference to the accompanying drawings, in which similar reference numerals are used throughout to denote similar elements, and the structures and devices shown are not necessarily drawn to scale. As used herein, the terms “component,” “system,” “interface,” etc., are intended to refer to computer-related entities, hardware, software (e.g., in execution), and / or firmware. For example, a component can be a processor (e.g., a microprocessor, controller, or other processing device), a process running on a processor, a controller, an object, an executable file, a program, a storage device, a computer, a tablet computer, and / or user equipment with processing devices (e.g., a mobile phone, etc.). By way of example, an application running on a server and a server can also be components. One or more components may reside in a process, and components may be located on a single computer and / or distributed across two or more computers. This document may describe a set of elements or other sets of components, wherein the term “set” can be interpreted as “one or more.”

[0124] Furthermore, these components can be executed from various computer-readable storage media on which various data structures are stored, such as by utilizing modules, for example. Components can communicate via local and / or remote processes, for example, based on signals having one or more data packets (e.g., data from one component interacts with another component in a local system, a distributed system, and / or throughout a network, such as the Internet, a local area network, a wide area network, or similar networks with other systems via signals).

[0125] For example, a component can be a device with a specific function provided by a mechanical component operated by electrical or electronic circuitry, wherein the electrical or electronic circuitry can be operated by a software application or firmware application executed by one or more processors. The one or more processors can be internal or external to the device and can execute at least a portion of the software or firmware application. As another example, a component can be a device that provides a specific function through an electronic component without a mechanical component; the electronic component may include one or more processors to execute software and / or firmware that at least partially endows the electronic component with that function.

[0126] As used herein, the term "circuit" may refer to, be part of, or may include: an application-specific integrated circuit (ASIC), electronic circuit, processor (shared, dedicated, or grouped), or associated memory (shared, dedicated, or grouped) operatively coupled to the circuit, which executes one or more software or firmware programs, combinational logic circuits, or other suitable hardware components that provide the described functions. In some aspects, the circuit may be implemented in one or more software or firmware modules, or the functions associated with the circuit may be implemented by one or more software or firmware modules. In some aspects, the circuit may include logic components that operate at least partially in hardware.

[0127] The use of the term “exemplary” is intended to present the concept in a specific manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise stated or clearly apparent from the context, “X adopts A or B” is intended to mean any natural inclusive arrangement. That is, “X adopts A or B” is satisfied if X adopts A; X adopts B; or X adopts both A and B. Additionally, the articles “a” and “an” used in this application and the appended claims should generally be interpreted as meaning “one or more” unless otherwise stated or clearly apparent from the context to refer to the singular form. Furthermore, to the extent that the terms “comprising,” “including,” “having,” “having,” “with,” or variations thereof are used in the Detailed Description and Claims, such terms are intended to be included in a manner similar to the term “comprising.” Furthermore, in the context of discussing one or more numbered items (e.g., “first X,” “second X,” etc.), generally, the one or more numbered items may be different or they may be the same, but in some cases, the context may indicate that they are different or that they are the same.

Claims

1. A baseband processor for a user equipment (UE), comprising: One or more processors, said one or more processors being configured to: Generate a Physical Side Link Control Channel (PSCCH) message including Level 1 Side Link Control Information (SCI), wherein the Level 1 SCI includes an indication of an SCI assistance request, a format for the Level 2 SCI, and a first indication of one or more reserved resources; and This triggers the transmission of the PSCCH message with the first-level SCI. The second-level SCI is included in the Physical Side Link Shared Channel (PSSCH), wherein one or more auxiliary UEs decode the second-level SCI according to the format of the second-level SCI, and wherein the second-level SCI includes: The second-level indication specifies a subset of the one or more auxiliary UEs according to a standard, wherein the SCI assistance request triggers the subset of the one or more auxiliary UEs to transmit the first-level SCI according to the one or more reserved resources, wherein the standard includes one or more of a range between the UE and the subset of the one or more auxiliary UEs of the baseband processor.

2. The baseband processor of claim 1, wherein the one or more processors are further configured to configure the first indication by setting the second-level SCI format field in the first-level SCI to a reserved value to indicate the SCI assistance request and the format of the second-level SCI.

3. The baseband processor of claim 1, wherein the first-level SCI is configured according to SCI format 1-A, and the first indication is configured by setting one or more reserved bits of the SCI format 1-A to non-zero values.

4. The baseband processor of claim 1, wherein the first-level SCI includes a bit field associated with the format of the second-level SCI, and the first indication is configured by setting the bit field to a reserved value.

5. The baseband processor of claim 1, wherein the first-level SCI indicates format 2-B for the second-level SCI, and the one or more processors are further configured to: Generate a Physical Side Link Shared Channel (PSSCH) message that includes the second-level SCI, wherein the second-level SCI includes a second indication instructing one or more auxiliary UEs to transmit the first-level SCI.

6. The baseband processor according to claim 5, further configured as follows: Configure the second indication based on a communication range threshold, wherein the communication range threshold is based on the channel quality between the receiving (Rx) UE and the UE.

7. The baseband processor of claim 6, wherein the second indication indicates: When the Rx UE has a communication range less than or equal to the communication range threshold, the Rx UE will transmit the first-level SCI, or When the Rx UE has a communication range greater than the communication range threshold, the Rx UE will transmit the first level SCI.

8. The baseband processor of claim 1, wherein the first-level SCI further indicates the second-level SCI format according to format 2-A, and the one or more processors are further configured to: Generate a Physical Side Link Shared Channel (PSSCH) message including the second-level SCI, wherein the second-level SCI includes a second indication instructing one or more auxiliary UEs to transmit the first-level SCI; and Configure the second indicator to indicate unicast instant messaging by configuring the propagation type indicator.

9. The baseband processor of claim 1, wherein the first-level SCI further indicates one or more scheduling parameters, and the one or more processors are further configured to: Receive one or more scheduling parameters for updating the one or more reserved resources.

10. A baseband processor for a user equipment (UE), comprising: One or more processors, said one or more processors being configured to: Receive a Physical Side Link Control Channel (PSCCH) message including Level 1 Side Link Control Information (SCI), wherein the Level 1 SCI includes an indication of an SCI assistance request, a format for a Level 2 SCI, and a first indication of one or more reserved resources; and In response to the SCI assistance request, the first-level SCI is triggered to transmit to one or more other UEs based on the one or more reserved resources. The second-level SCI is included in the Physical Side Link Shared Channel (PSSCH), wherein one or more auxiliary UEs decode the second-level SCI according to the format of the second-level SCI, and wherein the second-level SCI includes: The second-level indication specifies a subset of the one or more auxiliary UEs according to a standard, wherein the SCI assistance request triggers the subset of the one or more auxiliary UEs to transmit the first-level SCI according to the one or more reserved resources, wherein the standard includes one or more of a range between the UE and the subset of the one or more auxiliary UEs of the baseband processor.

11. The baseband processor of claim 10, wherein the one or more reserved resources include one or more scheduling parameters, and the one or more processors are further configured to: Perform channel interference measurements; Based on the channel interference measurement, one or more updated scheduling parameters that differ from the one or more scheduling parameters are determined; and This triggers the transmission of a message that includes the updated one or more scheduling parameters.

12. The baseband processor of claim 10, further configured to receive a Physical Side Link Shared Channel (PSSCH) message including a second-level SCI, wherein the second-level SCI includes a second indication instructing one or more auxiliary UEs to transmit the first-level SCI.

13. The baseband processor according to claim 10, further configured as follows: Identify the PSCCH-based Format 1-A configuration included in the first-level SCI; and The transmission of the first-level SCI is caused according to the PSCCH-based format 1-A configuration.

14. The baseband processor according to claim 10, further configured as follows: The transmission of the second-level SCI is triggered by the first instruction, wherein the transmission of the first-level SCI and the second-level SCI indicates the SCI assistance request identified in the first instruction.

15. The baseband processor according to claim 10, further configured as follows: Receive Physical Side Link Shared Channel (PSSCH) messages, including Level 2 SCI; The second level SCI identifies a second indication including a communication range threshold, wherein the communication range threshold is related to the channel quality between the UE and the Tx UE; Perform communication range measurement; Based on the communication range measurement, it is determined that the UE meets the communication range threshold; and In response to the satisfaction of the communication range threshold, the first-level SCI is transmitted to one or more other UEs.

16. The baseband processor of claim 10, further configured as follows: Identify SCI format 1-A included in the first-level SCI; and The first indication is identified by one or more reserved bits of the SCI format 1-A having a non-zero value.

17. The baseband processor according to claim 10, further configured as follows: In response to receiving one or more updated scheduling parameters, an acknowledgment (ACK) for transmission is output, wherein the ACK: (i) Indicate to the subset of the one or more auxiliary UEs that the one or more reserved resources are updated to the updated one or more reserved resources according to the updated one or more scheduling parameters; and (ii) Trigger the subset of the one or more auxiliary UEs to transmit the first-level SCI according to the updated one or more reserved resources.

18. The baseband processor according to claim 10, further configured as follows: In response to receiving one or more updated scheduling parameters, a negative acknowledgment (NACK) for transmission is output, wherein the NACK indicates to the subset of the one or more auxiliary UEs that the one or more reserved resources have not been updated according to the one or more updated scheduling parameters, and triggers the subset of the one or more auxiliary UEs to transmit the first-level SCI according to the one or more reserved resources.

19. An apparatus configured for use within a user equipment (UE), Includes one or more processors, said one or more processors being configured to: A first-level sidelink control information (SCI) is generated, wherein the first-level SCI includes an indication of an SCI assistance request, a format of a second-level SCI, and a first indication of one or more reserved resources, wherein the first indication indicates that the receiving (Rx) UE transmits the first-level SCI. The second-level SCI is included in the Physical Side Link Shared Channel (PSSCH), wherein one or more auxiliary UEs decode the second-level SCI according to the format of the second-level SCI, and wherein the second-level SCI includes: The second-level indication specifies a subset of the one or more auxiliary UEs according to a standard, wherein the SCI assistance request triggers the subset of the one or more auxiliary UEs to transmit the first-level SCI according to the one or more reserved resources, wherein the standard includes a cell identifier (ID) or one or more of a range between the UE and the subset of the one or more auxiliary UEs of the one or more processors.

20. The apparatus of claim 19, wherein the first indication is configured by a reserved value in the first-level SCI.

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