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EP-4201137-B1 - METHOD AND APPARATUS FOR INTER-USER EQUIPMENT COORDINATION SIGNALING

EP4201137B1EP 4201137 B1EP4201137 B1EP 4201137B1EP-4201137-B1

Inventors

  • FARAG, Emad Nader
  • PAPASAKELLARIOU, ARISTIDES
  • JEONG, KYEONGIN

Dates

Publication Date
20260506
Application Date
20210917

Claims (14)

  1. A first user equipment, UE, (116) in a communication system, the first UE (116) comprising: a processor configured to: perform resource sensing and resource selection by monitoring slots in a sensing window, the monitored slots belonging to a corresponding sidelink, SL, resource pool, and not being used for the UE's own transmission, wherein sensing includes decoding received Sidelink Control Information, SCI, on Physical Sidelink Control Channel, PSCCH, identify a resource reservation period, P rsvp , field in the received SCI, the resource reservation period being in units of milliseconds, ms, and being for SL transmission on a future SL resource; and convert P rsvp into P' rsvp logical SL slots as: P rsvp ′ = L T × P rsvp wherein: T is a period of 10240 ms, L is a value related to logical slots in a resource pool in the period T, and L is determined as a number of slots corresponding to bits having value 1 within a bitmap, among a set of slots in the period T excluding at least one non-SL slot, at least one slot that is configured for SL SS/PBCH Block, S-SSB slot, and at least one reserved slot.
  2. The first UE (116) of claim 1, wherein: the processor is further configured to identify whether a conflict occurs on a first reserved resource for a second UE, and the conflict occurs on the first reserved resource in response to the first reserved resource being overlapped, in time, with a resource for transmission of the first UE (116).
  3. The first UE (116) of claim 1, wherein: the processor is further configured to identify whether a conflict occurs on a first reserved resource for a second UE, and the conflict occurs on the first reserved resource in response to the first reserved resource being overlapped, in time and frequency, with a second reserved resource for a PSSCH of a third UE.
  4. The first UE (116) of claim 3, wherein a reference signal received power, RSRP, of the third UE is above a RSRP threshold, and wherein the RSRP threshold depends on a first priority value associated with the first reserved resource and a second priority value associated with the second reserved resource.
  5. The first UE (116) of claim 1, wherein: L = 2 μ × 10240 − N nonSL − N S − SSB − N reserved × L bitmap , one L bitmap , µ: is a sub-carrier spacing configuration, N nonSL : is a number of non-SL slots in 1024 frames, N S-SSB : is a number of SL-Synchronization Signal Block, S-SSB, slots in 1024 frames, N reserved : is a number of reserved slots in 1024 frames, L bitmap,one : is a number of bits having value 1 in the bitmap associated with the resource pool, and L bitmap : is a total number of bits in the bitmap associated with the resource pool.
  6. The first UE (116) of claim 1, wherein: a configured grant period, sl_periodCG , in milliseconds is converted to a period, PeriodicitySL, in logical slots as: PeriodicitySL = L 10240 ms × sl _ periodCG .
  7. The first UE (116) of claim 6, wherein a logical slot for S th sidelink grant for a sidelink configured grant type 1 is determined as: sl − ReferenceSlotCG − Type 1 + sl − TimeOffsetCGType 1 + S × PeriodicitySL modulo L , wherein: sl-ReferenceSlotCG-Type1: is a reference logical slot determined as sl − ReferenceSlotCG − Type 1 = ∑ i = 0 sl − TimeReferenceSFN _ Type 1 − 1 SlotsOfSLResourcePoolinFrame i , SlotsOfSLResourcePoolinFrame ( i ): is a number of slots of a resource pool in a frame with index i, sl_TimeReferenceSFN_Type 1: is a system frame number configured as 0 or 512, and sl-TimeOffsetCGType1: is a slot offset with respect to the reference logical slot.
  8. The first UE (116) of claim 6, wherein a logical slot for S th sidelink grant for a sidelink configured grant type 2 is determined as: sl − StartSlotCG − Type 2 + S × PeriodicitySL modulo L wherein sl-StartSlotCG-Type2 is a logical slot of a first transmission opportunity of PSSCH where the configured sidelink grant was (re-)initialized, and determined as sl − StartSlotCG − Type 2 = ∑ i = 0 SFNstart time − 1 SlotsOfSLResourcePoolinFrame i + slot start time , SFN start time and slot start time being a subframe number, SFN, and logical slot, respectively, of the first transmission opportunity of PSSCH where the configured sidelink grant was (re-)initialized.
  9. A method performed by a first user equipment, UE, (116) in a communication system, the method comprising: performing resource sensing and resource selection by monitoring slots in a sensing window, the monitored slots belonging to a corresponding sidelink, SL, resource pool, and not being used for the UE's own transmission, wherein sensing includes decoding received Sidelink Control Information, SCI, on Physical Sidelink Control Channel, PSCCH, identifying a resource reservation period, P rsvp , field in the received SCI, the resource reservation period being in units of milliseconds, ms, and being for SL transmission on a future SL resource; and converting P rsvp into P' rsvp logical SL slots as: P rsvp ′ = L T × P rsvp wherein: T is a period of 10240 ms, L is a value related to logical slots in a resource pool in the period T, and L is determined as a number of slots corresponding to bits having value 1 within a bitmap, among a set of slots in the period T excluding at least one non-SL slot, at least one slot that is configured for SL SS/PBCH Block, S-SSB slot, and at least one reserved slot.
  10. The method of claim 9, further comprising identifying whether a conflict occurs on a first reserved resource for a second UE, and the conflict occurs on the first reserved resource in response to the first reserved resource being overlapped, in time, with a resource for transmission of the first UE (116).
  11. The method of claim 9, further comprising identifying whether a conflict occurs on a first reserved resource for a second UE, and the conflict occurs on the first reserved resource in response to the first reserved resource being overlapped, in time and frequency, with a second reserved resource for a PSSCH of a third UE.
  12. The method of claim 11, wherein a reference signal received power, RSRP, of the third UE is above a RSRP threshold, and wherein the RSRP threshold depends on a first priority value associated with the first reserved resource and a second priority value associated with the second reserved resource.
  13. The method of claim 9, wherein: L = 2 μ × 10240 − N nonSL − N S − SSB − N reserved × L bitmap , one L bitmap , µ: is a sub-carrier spacing configuration, N nonSL : is a number of non-SL slots in 1024 frames, N S-SSB : is a number of SL-Synchronization Signal Block, S-SSB, slots in 1024 frames, N reserved : is a number of reserved slots in 1024 frames, L bitmap,one : is a number of bits having value 1 in the bitmap associated with the resource pool, and L bitmap : is a total number of bits in the bitmap associated with the resource pool.
  14. The method of claim 9, wherein; a configured grant period, sl_periodCG , in milliseconds is converted to a period, PeriodicitySL, in logical slots as: PeriodicitySL = L 10240 ms × sl _ periodCG .

Description

[Technical Field] The present disclosure relates generally to wireless communication systems and, more specifically, the present disclosure relates to inter user equipment (UE) coordination signaling. [Background Art] To meet the demand for wireless data traffic having increased since deployment of 4G communication systems, efforts have been made to develop an improved 5G or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a 'Beyond 4G Network' or a 'Post LTE System'. The 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, the beamforming, massive multiple-input multiple-output (MIMO), Full Dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed in 5G communication systems. In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud Radio Access Networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), reception-end interference cancellation and the like. In the 5G system, Hybrid FSK and QAM Modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier (FBMC), non-orthogonal multiple access(NOMA), and sparse code multiple access (SCMA) as an advanced access technology have been developed. The Internet, which is a human centered connectivity network where humans generate and consume information, is now evolving to the Internet of Things (IoT) where distributed entities, such as things, exchange and process information without human intervention. The Internet of Everything (IoE), which is a combination of the IoT technology and the Big Data processing technology through connection with a cloud server, has emerged. As technology elements, such as "Sensing technology", "wired/wireless communication and network infrastructure", "rervice interface technology", and "security technology" have been demanded for IoT implementation, a sensor network, a Machine-to-Machine (M2M) communication, Machine Type Communication (MTC), and so forth have been recently researched. Such an IoT environment may provide intelligent Internet technology services that create a new value to human life by collecting and analyzing data generated among connected things. IoT may be applied to a variety of fields including smart home, smart building, smart city, smart car or connected cars, smart grid, health care, smart appliances and advanced medical services through convergence and combination between existing Information Technology (IT) and various industrial applications. In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as a sensor network, Machine Type Communication (MTC), and Machine-to-Machine (M2M) communication may be implemented by beamforming, MIMO, and array antennas. Application of a cloud Radio Access Network (RAN) as the above-described Big Data processing technology may also be considered to be as an example of convergence between the 5G technology and the IoT technology. 5th generation (5G) or new radio (NR) mobile communications is recently gathering increased momentum with all the worldwide technical activities on the various candidate technologies from industry and academia. The candidate enablers for the 5G/NR mobile communications include massive antenna technologies, from legacy cellular frequency bands up to high frequencies, to provide beamforming gain and support increased capacity, new waveform (e.g., a new radio access technology (RAT)) to flexibly accommodate various services/applications with different requirements, new multiple access schemes to support massive connections, and so on. 3GPP technical document R1- 2006829 discloses "Reliability and Latency Enhancements for Mode 2". 3GPP technical document R1-2005749 discloses "Discussion on feasibility and benefits for mode 2 enhancement". Other relevant prior art patent documents are: WO 2018/174661 A1 (SAMSUNG ELECTRONICS CO LTD [KR]) 27 September 2018 (2018-09-27); and WO 2020/017939 A1 (SAMSUNG ELECTRONICS CO LTD [KR]) 23 January 2020 (2020-01-23). [Disclosure of Invention] [Technical Problem] 3GPP Release 16 includes sidelink through work item "5G V2X with NR sidelink," the mechanisms introduced focused mainly on vehicle-to-everything (V2X) and can be used for public safety when the service requirement can be met. Release 17 extends sidelink support to more use cases through work item "NR Sidelink enhancement". One of the motivations for the sidelink enhancement, in Release 17, is enhanced reliability and reduced latency. One of the object