CN111480382A - User equipment and wireless communication method thereof - Google Patents

User equipment and wireless communication method thereof Download PDF

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Publication number
CN111480382A
CN111480382A CN201880081134.7A CN201880081134A CN111480382A CN 111480382 A CN111480382 A CN 111480382A CN 201880081134 A CN201880081134 A CN 201880081134A CN 111480382 A CN111480382 A CN 111480382A
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CN
China
Prior art keywords
region
tti
sidelink
length
slot
Prior art date
Application number
CN201880081134.7A
Other languages
Chinese (zh)
Inventor
林晖闵
唐海
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2018/075643 priority Critical patent/WO2019153147A1/en
Publication of CN111480382A publication Critical patent/CN111480382A/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/02Selection of wireless resources by user or terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation where an allocation plan is defined based on the type of the allocated resource
    • H04W72/0446Wireless resource allocation where an allocation plan is defined based on the type of the allocated resource the resource being a slot, sub-slot or frame
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/16Interfaces between hierarchically similar devices
    • H04W92/18Interfaces between hierarchically similar devices between terminal devices

Abstract

A user equipment includes a memory and a processor coupled to the memory. The processor is configured to perform communication to the at least one second user equipment via the sidelink interface and to transmit the at least one data transport block to the at least one second user equipment using at least one sidelink resource of the sidelink resource pool. The sidelink resource pool comprises a plurality of time slots in the time domain and a plurality of physical resource block dimensions in the frequency domain. The sidelink resource pool includes at least one Transmission Time Interval (TTI) region each having a slot length, at least one long TTI region each having an integer multiple of the slot length, and at least one short TTI region each having a slot length. The at least one short TTI region includes a plurality of short TTIs, each of which has a length less than one slot length.

Description

User equipment and wireless communication method thereof

Background of the disclosure

1. Field of the disclosure

The present disclosure relates to the field of communication systems, and more particularly, to a user equipment and a wireless communication method thereof.

2. Description of the related Art

In the long term evolution (L TE) radio access technology, layer 1 (L1) transmission of data Transport Blocks (TBs) in the downlink, uplink and sidelink (e.g., via the air interface (Uu) and PC5 interfaces) is conventionally performed in units of one subframe with a fixed length of 1 millisecond, which is only the Transmission Time Interval (TTI) supported in the fourth generation (4G) system.

The data delay requirements for end-to-end communication have become very short due to the ever increasing demand for emergency transmission of data via a sidelink interface such as a PC5 interface to support public safety, road safety and mission critical communication, for example, in the third generation partnership project (3GPP), the SA-WG1 work item has determined and elaborated delay requirements for end-to-end data transmission, which can be as short as 10ms in vehicle queuing operations, for which requirements fast and reliable communication between neighboring vehicles is critical for safe driving and handling on the road if data needs to be transmitted from one end of the queue to the other, L1 transmissions and relays, as another example, for completely unmanned operation such as autonomous driving, fast and reliable communication between neighboring vehicles is critical for safe driving and handling on the road, and for which the communication delay time requirements are defined as 5 ms or less, hi view of the existing L TE sidelink technology, these requirements are difficult to be met, and due to the resource selection mechanisms and fixed length of the transmission, it is guaranteed that it can meet these requirements for high-speed data transmission requirements, which cannot be supported by the underlying broadband wireless sensors (X) and also support high data transmission rate sharing requirements for high data sharing.

However, if sidelink data transmission TTIs are still associated with one slot of 14 symbols in a 5G-NR system, and retransmissions of data TBs are spread from slot to slot, this is still not a guarantee that the strict delay time requirements for data interaction on the NR sidelink over the PC5 interface can be met.

Disclosure of Invention

An object of the present disclosure is to propose a User Equipment (UE) and a wireless communication method thereof for providing at least one Transmission Time Interval (TTI) region, at least one long TTI region and at least one short TTI region for New Radio (NR) sidelink communications in the same sidelink resource pool.

In a first aspect of the disclosure, a user equipment for wireless communication includes a memory and a processor coupled to the memory. The processor is configured to perform communication to the at least one second user equipment over the sidelink interface and to transmit the at least one data transport block to the at least one second user equipment using at least one sidelink resource of the sidelink resource pool. The sidelink resource pool includes a plurality of slots in the time domain and a dimension (dimension) of a plurality of Physical Resource Blocks (PRBs) in the frequency domain. The sidelink resource pool includes at least one Transmission Time Interval (TTI) region each having a slot length, at least one long TTI region each having an integer multiple of the slot length, and at least one short TTI region each having a slot length. The at least one short TTI region includes a plurality of short TTIs, each of which has a length less than one slot length.

According to an embodiment incorporating the first aspect of the present disclosure, the sidelink resource pool in each slot includes a Guard Period (GP)/Automatic Gain Control (AGC) region, a control region for transmitting a Physical Sidelink Control Channel (PSCCH) carrying Sidelink Control Information (SCI), and a data region for transmitting a physical sidelink shared channel (PSCCH) for transmitting a plurality of sidelink data Transport Blocks (TBs).

According to an embodiment in combination with the first aspect of the disclosure, the at least one long TTI region comprises a start slot and at least one adjacent slot adjacent to the start slot, and the processor is configured to map and transmit the sidelink data TB with a corresponding GP/AGC region and a corresponding control region for transmission of the pscch in the at least one adjacent slot.

According to an embodiment incorporating the first aspect of the present disclosure, the at least one long TTI region based on network configuration or pre-configuration comprises the last symbol reserved, nulled or blank when allocating a sidelink resource pool on a carrier also being used for cellular uplink operation.

According to an embodiment incorporating the first aspect of the present disclosure, if the carrier is configured or preconfigured by the network for sidelink transmission only, the last symbol of the at least one long TTI region is omitted as a reserved symbol, a null symbol or a blank symbol and used for mapping and transmission of a sidelink data TB.

According to an embodiment in combination with the first aspect of the disclosure, the short TTIs have the same length and the processor is configured to map and transmit the sidelink data TB with the short TTIs.

According to an embodiment incorporating the first aspect of the present disclosure, the at least one short TTI region based on network configuration or pre-configuration comprises the last symbol reserved, nulled or blank when allocating a sidelink resource pool on a carrier also being used for cellular uplink operation.

According to an embodiment incorporating the first aspect of the present disclosure, if the carrier is configured or preconfigured by the network for sidelink transmission only, the last symbol of the at least one short TTI region is omitted as a reserved symbol, a null symbol or a blank symbol and used for mapping and transmission of a sidelink data TB.

According to an embodiment in combination with the first aspect of the disclosure, the SCI comprises at least one of a TTI type, a TTI length, a presence of a PSCCH and a GP/AGC region of the at least one long TTI region, a modulation and coding scheme level (MCS), a Transport Block Size (TBS), a redundancy version of the short TTI transmission, and a sequence of the short TTI transmission.

According to an embodiment incorporating the first aspect of the present disclosure, the TTI type is represented by two bits to provide three indications comprising at least one TTI region, at least one long TTI region and at least one short TTI region.

According to an embodiment incorporating the first aspect of the present disclosure, the TTI length is the length of at least one long TTI region and is represented by two bits to provide four indications comprising 2, 3, 4 and 5 slots.

According to an embodiment incorporating the first aspect of the present disclosure, the TTI length is the length of each short TTI and is represented by two bits to provide four indications comprising 2, 3, 4 and 5 symbols.

According to an embodiment incorporating the first aspect of the present disclosure, when the length of each short TTI is 2, 3, 4 and 5 symbols, the number of short TTIs is 5, 3, 2 and 2, respectively.

According to an embodiment incorporating the first aspect of the present disclosure, the presence of the GP/AGC region and the PSCCH is represented by 1 bit.

According to an embodiment in combination with the first aspect of the present disclosure, if the bit is enable (on), at least one long TTI region in other slots than the start slot includes a part of the data region instead of the GP/AGC region and the control region.

According to an embodiment incorporating the first aspect of the disclosure, each slot has a fixed length of 14 symbols.

According to an embodiment incorporating the first aspect of the present disclosure, the GP/AGC region has a length of 1 to 2 symbols allocated at the beginning of a slot.

According to an embodiment in combination with the first aspect of the disclosure, the control region has a length of 2 symbols.

According to an embodiment in combination with the first aspect of the disclosure, the data area has a length of 10 to 11 symbols.

According to an embodiment in combination with the first aspect of the disclosure, the sidelink resource pool comprises at least one TTI region for slot based transmission, and at least one long TTI region and at least one short TTI region for non-slot based transmission.

In a second aspect of the disclosure, a user equipment for wireless communication includes a memory and a processor coupled to the memory. The processor is configured to perform communication to the at least one second user equipment over the sidelink interface and to receive at least one data transport block from the at least one second user equipment using at least one sidelink resource of the sidelink resource pool. The sidelink resource pool comprises a plurality of slots in the time domain and a plurality of Physical Resource Block (PRB) dimensions in the frequency domain. The sidelink resource pool includes at least one Transmission Time Interval (TTI) region each having a slot length, at least one long TTI region each having an integer multiple of the slot length, and at least one short TTI region each having a slot length. The at least one short TTI region includes a plurality of short TTIs, each of which has a length less than one slot length.

According to another embodiment incorporating the second aspect of the present disclosure, the sidelink resource pool in each slot includes a Guard Period (GP)/Automatic Gain Control (AGC) region, a control region for transmitting a Physical Sidelink Control Channel (PSCCH) carrying Sidelink Control Information (SCI), and a data region for transmitting a physical sidelink shared channel (PSCCH) for transmitting a plurality of sidelink data Transport Blocks (TBs).

According to another embodiment in combination with the second aspect of the disclosure, the at least one long TTI region comprises a start slot and at least one adjacent slot adjacent to the start slot, and the processor is configured to receive and decode the sidelink data TBs using a corresponding GP/AGC region and a corresponding control region for receiving the pschs in the at least one adjacent slot.

According to another embodiment in combination with the second aspect of the disclosure, the at least one long TTI region based on network configuration or pre-configuration comprises the last symbol reserved, nulled or blank when allocating a sidelink resource pool on a carrier also being used for cellular uplink operation.

According to another embodiment incorporating the second aspect of the present disclosure, if the carrier is configured or preconfigured by the network for sidelink transmission only, the last symbol of the at least one long TTI region is omitted as a reserved symbol, a null symbol or a blank symbol and used for mapping and transmission of sidelink data TBs.

According to a further embodiment in combination with the second aspect of the disclosure, the short TTIs have the same length and the processor is configured to receive and decode the sidelink data TB using the short TTIs.

According to another embodiment in combination with the second aspect of the disclosure, the at least one short TTI region based on network configuration or pre-configuration comprises a last symbol reserved, nulled or blank when allocating a sidelink resource pool on a carrier also being used for cellular uplink operation.

According to another embodiment incorporating the second aspect of the present disclosure, if the carrier is configured or preconfigured by the network for sidelink transmission only, the last symbol of the at least one short TTI region is omitted as a reserved symbol, a null symbol or a blank symbol and used for mapping and transmission of a sidelink data TB.

According to another embodiment incorporating the second aspect of the present disclosure, the SCI includes at least one of a TTI type, a TTI length, a presence of a PSCCH and a GP/AGC region of the at least one long TTI region, a Modulation and Coding Scheme (MCS) level, a Transport Block Size (TBS), a redundancy version of the short TTI transmission, and a sequence of the short TTI transmission.

According to another embodiment in combination with the second aspect of the disclosure, the TTI type is represented by two bits to provide three indications comprising at least one TTI region, at least one long TTI region and at least one short TTI region.

According to another embodiment incorporating the second aspect of the disclosure, the TTI length is the length of at least one long TTI region and is represented by two bits to provide four indications including 2, 3, 4 and 5 slots.

According to another embodiment incorporating the second aspect of the disclosure, the TTI length is the length of each short TTI and is represented by two bits to provide four indications comprising 2, 3, 4 and 5 symbols.

According to another embodiment incorporating the second aspect of the present disclosure, when the length of each short TTI is 2, 3, 4 and 5 symbols, the number of short TTIs is 5, 3, 2 and 2, respectively.

According to another embodiment incorporating the second aspect of the present disclosure, the presence of the GP/AGC region and the PSCCH is represented by 1 bit.

According to another embodiment in combination with the second aspect of the present disclosure, if the bit is enabled, at least one long TTI region in other slots than the start slot includes a part of the data region instead of the GP/AGC region and the control region.

According to a further embodiment incorporating the second aspect of the disclosure, each slot has a fixed length of 14 symbols.

According to another embodiment incorporating the second aspect of the present disclosure, the GP/AGC region has a length of 1 to 2 symbols allocated at the beginning of a slot.

According to a further embodiment in combination with the second aspect of the disclosure, the control region has a length of 2 symbols.

According to another embodiment in combination with the second aspect of the disclosure, the data region has a length of 10 to 11 symbols.

According to another embodiment in combination with the second aspect of the disclosure, the sidelink resource pool comprises at least one TTI region for slot-based transmission, and at least one long TTI region and at least one short TTI region for non-slot-based transmission.

In a third aspect of the present disclosure, a method of wireless communication of a user equipment includes: the method further includes performing communication to the at least one second user equipment over the sidelink interface, and transmitting the at least one data transport block to the at least one second user equipment using at least one sidelink resource of the sidelink resource pool. The sidelink resource pool comprises a plurality of slots in the time domain and a plurality of Physical Resource Block (PRB) dimensions in the frequency domain. The sidelink resource pool includes at least one Transmission Time Interval (TTI) region each having a slot length, at least one long TTI region each having an integer multiple of the slot length, and at least one short TTI region each having a slot length. The at least one short TTI region includes a plurality of short TTIs, each of which has a length less than one slot length.

According to another embodiment in combination with the third aspect of the present disclosure, the sidelink resource pool in each slot includes a Guard Period (GP)/Automatic Gain Control (AGC) region, a control region for transmitting a Physical Sidelink Control Channel (PSCCH) carrying Sidelink Control Information (SCI), and a data region for transmitting a physical sidelink shared channel (PSCCH) for transmitting a plurality of sidelink data Transport Blocks (TBs).

According to another embodiment in combination with the third aspect of the disclosure, the at least one long TTI region comprises a starting slot and at least one adjacent slot adjacent to the starting slot, and the method further comprises: the sidelink data TB is mapped and transmitted with a corresponding GP/AGC region and a corresponding control region for transmitting the psch in at least one adjacent slot.

According to another embodiment in combination with the third aspect of the present disclosure, the at least one long TTI region based on network configuration or pre-configuration comprises the last symbol reserved, nulled or blank when allocating a sidelink resource pool on a carrier also being used for cellular uplink operation.

According to another embodiment incorporating the third aspect of the present disclosure, if the carrier is configured or preconfigured by the network for sidelink transmission only, the last symbol of the at least one long TTI region is omitted as a reserved symbol, a null symbol or a blank symbol and used for mapping and transmission of a sidelink data TB.

According to another embodiment in combination with the third aspect of the disclosure, the short TTIs have the same length, and the method further comprises: the short TTI is utilized to map and transmit the sidelink data TB.

According to another embodiment in combination with the third aspect of the present disclosure, the at least one short TTI region based on network configuration or pre-configuration comprises the last symbol reserved, nulled or blank when allocating a sidelink resource pool on a carrier also being used for cellular uplink operation.

According to another embodiment incorporating the third aspect of the present disclosure, if the carrier is configured or preconfigured by the network for sidelink transmission only, the last symbol of the at least one short TTI region is omitted as a reserved symbol, a null symbol or a blank symbol and used for mapping and transmission of a sidelink data TB.

According to another embodiment in combination with the third aspect of the present disclosure, the SCI includes at least one of a TTI type, a TTI length, a presence of a PSCCH and a GP/AGC region of the at least one long TTI region, a Modulation and Coding Scheme (MCS) level, a Transport Block Size (TBS), a redundancy version of the short TTI transmission, and a sequence of the short TTI transmission.

According to another embodiment in combination with the third aspect of the present disclosure, the TTI type is represented by two bits to provide three indications comprising at least one TTI region, at least one long TTI region and at least one short TTI region.

According to another embodiment incorporating the third aspect of the present disclosure, the TTI length is the length of at least one long TTI region and is represented by two bits to provide four indications including 2, 3, 4 and 5 slots.

According to another embodiment incorporating the third aspect of the present disclosure, the TTI length is the length of each short TTI and is represented by two bits to provide four indications comprising 2, 3, 4 and 5 symbols.

According to another embodiment in combination with the third aspect of the present disclosure, when the length of each short TTI is 2, 3, 4 and 5 symbols, the number of short TTIs is 5, 3, 2 and 2, respectively.

According to another embodiment incorporating the third aspect of the present disclosure, the presence of the GP/AGC region and the PSCCH is represented by 1 bit.

According to another embodiment in combination with the third aspect of the present disclosure, if the bit is enabled, at least one long TTI region in other slots than the start slot includes a part of the data region instead of the GP/AGC region and the control region.

According to another embodiment incorporating the third aspect of the present disclosure, each slot has a fixed length of 14 symbols.

According to another embodiment incorporating the third aspect of the present disclosure, the GP/AGC region has a length of 1 to 2 symbols allocated at the beginning of a slot.

According to another embodiment in combination with the third aspect of the disclosure, the control region has a length of 2 symbols.

According to another embodiment in combination with the third aspect of the disclosure, the data area has a length of 10 to 11 symbols.

According to another embodiment in combination with the third aspect of the disclosure, the sidelink resource pool comprises at least one TTI region for slot-based transmission, and at least one long TTI region and at least one short TTI region for non-slot-based transmission.

In a fourth aspect of the present disclosure, a method of wireless communication of a user equipment includes: the method further includes performing communication to the at least one second user equipment over a sidelink interface, and receiving at least one data transport block from the at least one second user equipment using at least one sidelink resource of a sidelink resource pool. The sidelink resource pool comprises a plurality of slots in the time domain and a plurality of Physical Resource Block (PRB) dimensions in the frequency domain. The sidelink resource pool includes at least one Transmission Time Interval (TTI) region each having a slot length, at least one long TTI region each having an integer multiple of the slot length, and at least one short TTI region each having a slot length. The at least one short TTI region includes a plurality of short TTIs, each of which has a length less than one slot length.

According to another embodiment incorporating the fourth aspect of the present disclosure, the sidelink resource pool in each slot includes a Guard Period (GP)/Automatic Gain Control (AGC) region, a control region for transmitting a Physical Sidelink Control Channel (PSCCH) carrying Sidelink Control Information (SCI), and a data region for transmitting a physical sidelink shared channel (PSCCH) for transmitting a plurality of sidelink data Transport Blocks (TBs).

According to another embodiment in combination with the fourth aspect of the disclosure, the at least one long TTI region comprises a starting slot and at least one adjacent slot adjacent to the starting slot, and the method further comprises: the sidelink data TB is received and decoded with a corresponding GP/AGC region and a corresponding control region for receiving the psch in at least one adjacent slot.

According to another embodiment in combination with the fourth aspect of the disclosure, the at least one long TTI region based on network configuration or pre-configuration comprises the last symbol reserved, nulled or blank when allocating a sidelink resource pool on a carrier also being used for cellular uplink operation.

According to another embodiment incorporating the fourth aspect of the present disclosure, if the carrier is configured or preconfigured by the network for sidelink transmission only, the last symbol of the at least one long TTI region is omitted as a reserved symbol, a null symbol or a blank symbol and used for mapping and transmission of sidelink data TBs.

According to a further embodiment in combination with the fourth aspect of the disclosure, the short TTIs have the same length, and the method further comprises: the short TTI is utilized to receive and decode the sidelink data TB.

According to another embodiment in combination with the fourth aspect of the disclosure, the at least one short TTI region based on network configuration or pre-configuration comprises a last symbol reserved, nulled or blank when allocating a sidelink resource pool on a carrier also being used for cellular uplink operation.

According to another embodiment incorporating the fourth aspect of the present disclosure, if the carrier is configured or preconfigured by the network for sidelink transmission only, the last symbol of the at least one short TTI region is omitted as a reserved symbol, a null symbol or a blank symbol and used for mapping and transmission of a sidelink data TB.

According to another embodiment incorporating the fourth aspect of the present disclosure, the SCI includes at least one of a TTI type, a TTI length, a presence of a PSCCH and a GP/AGC region of the at least one long TTI region, a Modulation and Coding Scheme (MCS) level, a Transport Block Size (TBS), a redundancy version of the short TTI transmission, and a sequence of the short TTI transmission.

According to another embodiment in combination with the fourth aspect of the disclosure, the TTI type is represented by two bits to provide three indications comprising at least one TTI region, at least one long TTI region and at least one short TTI region.

According to another embodiment incorporating the fourth aspect of the present disclosure, the TTI length is the length of at least one long TTI region and is represented by two bits to provide four indications comprising 2, 3, 4 and 5 slots.

According to another embodiment incorporating the fourth aspect of the present disclosure, the TTI length is the length of each short TTI and is represented by two bits to provide four indications comprising 2, 3, 4 and 5 symbols.

According to another embodiment incorporating the fourth aspect of the present disclosure, when the length of each short TTI is 2, 3, 4 and 5 symbols, the number of short TTIs is 5, 3, 2 and 2, respectively.

According to another embodiment incorporating the fourth aspect of the present disclosure, the presence of the GP/AGC region and the PSCCH is represented by 1 bit.

According to another embodiment in combination with the fourth aspect of the present disclosure, if the bit is enabled, at least one long TTI region in other slots than the start slot includes a part of the data region instead of the GP/AGC region and the control region.

According to another embodiment incorporating the fourth aspect of the disclosure, each slot has a fixed length of 14 symbols.

According to another embodiment incorporating the fourth aspect of the present disclosure, the GP/AGC region has a length of 1 to 2 symbols allocated at the beginning of a slot.

According to a further embodiment in combination with the fourth aspect of the disclosure, the control region has a length of 2 symbols.

According to another embodiment in combination with the fourth aspect of the disclosure, the data region has a length of 10 to 11 symbols.

According to another embodiment in combination with the fourth aspect of the disclosure, the sidelink resource pool comprises at least one TTI region for slot-based transmission, and at least one long TTI region and at least one short TTI region for non-slot-based transmission.

In an embodiment of the present disclosure, a user equipment and a wireless communication method thereof are used to provide at least one TTI region, at least one long TTI region and at least one short TTI region for New Radio (NR) sidelink communications in the same sidelink resource pool, to provide fast and reliable data transmission for NR sidelink communications using short TTI structure and data repetition, to perform enhanced support for large size data transport blocks to use long TTI structure, and/or to flexibly use the sidelink resource pool, to facilitate coexistence and coordinated operation of all normal TTI, long TTI and short TTI transmissions.

Drawings

In order to more clearly explain embodiments of the present disclosure or related art, the following drawings, which will be described in the embodiments, are briefly introduced. It is to be understood that the drawings are merely exemplary of the disclosure and that other drawings may be derived by one of ordinary skill in the art without undue effort.

Fig. 1 is a block diagram of a user equipment for wireless communication according to an embodiment of the present disclosure.

Fig. 2 is a block diagram of a sidelink resource pool in accordance with an embodiment of the present disclosure.

Fig. 3 is a block diagram of at least one long Transmission Time Interval (TTI) region in accordance with an embodiment of the present disclosure.

Fig. 4 is a block diagram of at least one short TTI region according to an embodiment of the present disclosure.

Fig. 5 is a scenario of vehicle-associated-everything (V2X) communication according to an embodiment of the present disclosure.

Fig. 6A is a flowchart illustrating a wireless communication method according to the present disclosure in terms of an operation of a user equipment for transmitting a signal.

Fig. 6B is a flowchart illustrating a wireless communication method according to the present disclosure in terms of an operation of a user equipment for transmitting a signal.

Fig. 7A is a flow chart illustrating a method of wireless communication in accordance with the present disclosure from an operational aspect of a user equipment for receiving a signal.

Fig. 7B is a flow chart illustrating a method of wireless communication in accordance with the present disclosure from an operational aspect of a user equipment for receiving signals.

Detailed description of the embodiments

Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings by technical subject matter, structural features, attained objects, and effects. In particular, the terminology used in the embodiments of the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure.

Fig. 1 and 2 illustrate that, in some embodiments, at least one User Equipment (UE)100 for wireless communication includes a memory 102 and a processor 104 coupled to the memory 102. The processor 104 is configured to perform a communication to the at least one user equipment 200 via a sidelink interface, such as a PC5 interface, and to transmit at least one data transport block to the at least one second user equipment 200 using at least one sidelink resource of the sidelink resource pool 300. The sidelink resource pool 300 includes a plurality of slots in the time domain and a plurality of Physical Resource Block (PRB) dimensions in the frequency domain. The sidelink resource pool 300 includes at least one Transmission Time Interval (TTI) region 310 or 312 each having a slot length, at least one long TTI region 320 or 322 each having an integer multiple of the slot length, and at least one short TTI region 330 each having a slot length. The at least one short TTI region 330 includes a plurality of short TTIs, each of which has a length less than one slot length. At least one TTI region 310 or 312 is, for example, a normal TTI region.

Specifically, in some embodiments, the Guard Period (GP)/Automatic Gain Control (AGC) region 301, the control region 302, and the data region 303 are arranged in order. Each slot has a fixed length of 14 symbols. The GP/AGC region 301 has a length of 1 to 2 symbols allocated at the beginning of a slot for transmission/reception switching and adjustment of an input signal power level at the user equipment 200. The control region 302 has a length of 2 symbols. The data region 303 has a length of 10 to 11 symbols for transmitting a sidelink data Transport Block (TB). The sidelink resource pool 300 includes at least one TTI region 310 or 312 (e.g., a normal TTI region) for slot-based transmissions, and at least one long TTI region 320 or 322 and at least one short TTI region 330 for non-slot-based transmissions.

In an embodiment of the present disclosure, the user equipment 100 provides at least one of a TTI region, a long TTI region, and a short TTI region for New Radio (NR) sidelink communications in the same sidelink resource pool 300 to provide fast and reliable data transmission for the NR sidelink communications using a short TTI structure (e.g., at least one short TTI region 330) and data repetition, performs enhanced support for large size data Transport Blocks (TBs) to use the long TTI structure, and/or flexibly uses the sidelink resource pool to facilitate coexistence and coordinated operation of transmissions for all normal TTIs, long TTIs, and short TTIs.

In some embodiments, communication between the user equipment 100 and the user equipment 200 via a sidelink interface, such as a PC5 interface, may be based on Long term evolution (L TE) sidelink technology developed under the third Generation partnership project (3GPP) and/or 5 th Generation New radio (5G-NR) radio access technology.

Fig. 1 and 2 also show that in some embodiments, at least one user equipment 200 for wireless communication includes a memory 202 and a processor 204 coupled to the memory 202. The processor 204 is configured to perform communication to the at least one user equipment 100 via a sidelink interface, such as a PC5 interface, and to receive at least one data transport block from the at least one user equipment 100 using at least one sidelink resource of the sidelink resource pool 300.

In some embodiments, memories 102 and 202 may each include Read Only Memory (ROM), Random Access Memory (RAM), flash memory, memory cards, storage media, and/or other storage devices. Processors 104 and 204 may each include an Application Specific Integrated Circuit (ASIC), other chipset, logic circuit, and/or data processing device. The processors 104 and 204 may each also include baseband circuitry to process radio frequency signals. When the embodiments are implemented in software, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. These modules may be stored in the memories 102 and 202 and executed by the processors 104 and 204. The memories 102 and 202 may be implemented within the processors 104 and 204 or external to the processors 104 and 204, in which case the memories 102 and 202 may be communicatively coupled to the processors 104 and 204 via various means as is known in the art.

Further, fig. 1 and 2 show that in some embodiments, the sidelink resource pool 300 in each slot includes a Guard Period (GP)/Automatic Gain Control (AGC) region 301, a control region 302 for transmitting a Physical Sidelink Control Channel (PSCCH) carrying Sidelink Control Information (SCI), and a data region 303 for transmitting a physical sidelink shared channel (PSCCH) for transmitting a plurality of sidelink data Transport Blocks (TBs). As shown in fig. 3, the at least one long TTI region 320 includes a start slot and at least one adjacent slot adjacent to the start slot. The processor 104 is configured to map and transmit the sidelink data TB with a corresponding GP/AGC region 322 and a corresponding control region 323 for transmission of the psch 321 in at least one adjacent slot. The processor 204 is configured to receive and decode the sidelink data TB with a corresponding GP/AGC region 322 and a corresponding control region 323 for receiving the psch 321 in at least one adjacent slot. The at least one long TTI region 320 includes the last symbol, e.g., the last symbol of a blank/empty/reservation, when the sidelink resource pool 300 is allocated on a carrier. The SCI includes at least one of a TTI type, a TTI length, a presence of a PSCCH and a GP/AGC region of the at least one long TTI region 320, a Modulation and Coding Scheme (MCS) level, a Transport Block Size (TBS), a redundancy version of the short TTI transmission, and a sequence of the short TTI transmission.

In some embodiments, the TTI length may be the length of at least one long TTI region and is represented by two bits to provide four indications including 2, 3, 4, and 5 slots. Specifically, 00 means that the total length of at least one long TTI region is 2 slots. 01 means that the total length of at least one long TTI region is 3 slots. 10 means that the total length of the at least one long TTI region is 4 slots. 11 means that the total length of the at least one long TTI region is 5 slots. In some embodiments, the TTI length may be the length of each short TTI and is represented by two bits to provide four indications including 2, 3, 4, and 5 symbols. When the length of each short TTI is 2, 3, 4, and 5 symbols, the number of short TTIs is 5, 3, 2, and 2, respectively. Specifically, 00 means that when the length of each short TTI is 2 symbols, the number of short TTIs is 5. 01 means that when the length of each short TTI is 3 symbols, the number of short TTIs is 3. 10 means that when the length of each short TTI is 4 symbols, the number of short TTIs is 2. 11 means that when the length of each short TTI is 5 symbols, the number of short TTIs is 2. In some embodiments, 2 bits are not used or reserved if the TTI length may be the length of at least one TTI region (e.g., a normal TTI region).

In some embodiments, the presence of the GP/AGC region 322 and the PSCCH 323 are represented by 1 bit. If the bit is enabled, at least one long TTI region 320 in the other slots than the starting slot includes a portion of the data region 321 instead of the GP/AGC region 322 and the control region 323. Further, in some embodiments, the TTI type is represented by two bits to provide three indications including at least one TTI region 310, at least one long TTI region 320, and at least one short TTI region 330. Specifically, 00 means at least one TTI region 310, e.g. a normal TTI region, 01 means at least one long TTI region 320, 10 means at least one short TTI region 330.

As shown in fig. 4, in some embodiments, the short TTIs 331, 332, and 333 have the same length. The processor 104 is configured to map and transmit the sidelink data TB using the short TTIs 331, 332, and 333. The processor 204 is configured to receive and decode the sidelink data TB using the short TTIs 331, 332, and 333. The at least one short TTI region 330 includes a last symbol 336, e.g., a blank/empty/reserved last symbol, when the sidelink resource pool 300 is allocated on a carrier.

Fig. 3 and 4 illustrate some examples, fig. 3 illustrates that in some embodiments, at least one long TTI region 320 over a length of 2 slots is exemplarily shown, wherein a pre-allocated GP/AGC region 322 and a control region 323 in a second slot adjacent to a first slot will be used for mapping and transmission of a data TB (PSSCH), and when a sidelink resource pool 300 is configured on a carrier coexisting with cellular uplink (U L) transmission, a last symbol 324 of the at least one long TTI region 320 in the data region 321 for PSSCH is reserved/nulled/blanked for cellular uplink transmission.

Fig. 4 illustrates at least one short TTI region 330 within a time slot, in which multiple short TTIs 331, 332, and 333 of equal transmission length are mapped in a data region 334 for PSCCH, and each short TTI (stti) is used only for mapping of data TBs, that is, the associated scheduling control information for the short TTIs are both provided in a control region 335 for PSCCH when a sidelink resource pool 300 is configured on a carrier that coexists with cellular uplink (U L) transmissions, the last symbol 336 or symbols 336 of the slot in the data region 334 for PSCCH are reserved/nulled/blanked for cellular uplink transmissions.

Fig. 5 illustrates that in some embodiments, communication between user device 100 and user device 200 involves vehicle-to-vehicle (V2X) communication according to L TE sidelink technology and/or 5G-NR radio access technology developed under the third generation partnership project (3GPP) of release 14, where V2X communication includes vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), and vehicle-to-infrastructure/network (V2I/N). user devices 100 and 200 communicate directly with each other via a sidelink interface, such as a PC5 interface.

Fig. 6A and 6B illustrate two methods 400 and 400' of wireless communication according to the present disclosure in terms of operation of user equipment 100 for transmitting signals. Methods 400 and 400' each include: communication to the at least one user equipment 200 is performed via a sidelink interface at block 402, and at least one data transport block is transmitted to the at least one user equipment 200 using at least one sidelink resource of a sidelink resource pool at block 404. The sidelink resource pool 300 includes a plurality of slots in the time domain and a plurality of Physical Resource Block (PRB) dimensions in the frequency domain. The sidelink resource pool 300 includes at least one Transmission Time Interval (TTI) region 310 or 312 each having a slot length, at least one long TTI region 320 or 322 each having an integer multiple of the slot length, and at least one short TTI region 330 each having a slot length. The at least one short TTI region 330 includes a plurality of short TTIs, each of which has a length less than one slot length. At least one TTI region 310 or 312 is, for example, a normal TTI region.

In an embodiment of the present disclosure, the user equipment 100 provides at least one of a Transmission Time Interval (TTI) region, a long TTI region, and a short TTI region for New Radio (NR) sidelink communications in the same sidelink resource pool 300 to provide fast and reliable data transmission for the NR sidelink communications using a short TTI structure (e.g., at least one short TTI region 330) and data repetition, enhanced support for large size data Transport Blocks (TBs) to use a long TTI structure, and/or flexible use of the sidelink resource pool to facilitate coexistence and coordinated operation of transmissions for all normal TTIs, long TTIs, and short TTIs.

Fig. 6A also shows method 400 further including block 406. At block 406, sidelink data TBs are mapped and transmitted with a corresponding GP/AGC region and a corresponding control region for transmitting the psch in at least one adjacent slot.

Fig. 6B also shows method 400' further including block 408. At block 408, the sidelink data TB is mapped and transmitted utilizing the short TTI.

Fig. 7A and 7B illustrate two methods 500 and 500' of wireless communication according to the present disclosure from an operational aspect of user equipment 200 for receiving signals. Methods 500 and 500' include: communication to the at least one user equipment 100 is performed via a sidelink interface in block 502, and at least one data transport block from the at least one user equipment 100 is received using at least one sidelink resource of a sidelink resource pool in block 504. The sidelink resource pool 300 includes a plurality of slots in the time domain and a plurality of Physical Resource Block (PRB) dimensions in the frequency domain. The sidelink resource pool 300 includes at least one Transmission Time Interval (TTI) region 310 or 312 each having a slot length, at least one long TTI region 320 or 322 each having an integer multiple of the slot length, and at least one short TTI region 330 each having a slot length. The at least one short TTI region 330 includes a plurality of short TTIs, each of which has a length less than one slot length. At least one TTI region 310 or 312 is, for example, a normal TTI region.

In an embodiment of the present disclosure, the user equipment 200 receives at least one of a TTI region, a long TTI region, and a short TTI region for New Radio (NR) sidelink communications in the same sidelink resource pool 300 to provide fast and reliable data transmission for the NR sidelink communications using a short TTI structure (e.g., at least one short TTI region 330) and data repetition, performs enhanced support for large size data Transport Blocks (TBs) to use the long TTI structure, and/or flexibly uses the sidelink resource pool to facilitate coexistence and coordinated operation of transmissions for all normal TTIs, long TTIs, and short TTIs.

Fig. 7A also illustrates a method 500 that, in some embodiments, also includes block 506. At block 506, the sidelink data TB is received and decoded with a corresponding GP/AGC region and a corresponding control region for receiving the psch in at least one adjacent slot.

Fig. 7B also illustrates a method 500' that, in some embodiments, also includes block 508. At block 508, the sidelink data TB is received and decoded utilizing the short TTI.

In an embodiment of the present disclosure, a user equipment and a wireless communication method thereof are used to provide or receive at least one of a TTI region, a long TTI region and a short TTI region for New Radio (NR) sidelink communications in the same sidelink resource pool, to provide fast and reliable data transmission for NR sidelink communications using a short TTI structure and data repetition, to perform enhanced support for large size data transport blocks to use a long TTI structure, and/or to flexibly use the sidelink resource pool, to facilitate coexistence and coordinated operation of transmissions for all normal TTIs, long TTIs and short TTIs.

One of ordinary skill in the art understands that each unit, algorithm, and step described and disclosed in the embodiments of the present disclosure is implemented using electronic hardware or a combination of software and electronic hardware for a computer. Whether these functions are run in hardware or software depends on the conditions and design requirements of the application of the solution. Those of ordinary skill in the art may implement the functionality of each particular application in different ways without departing from the scope of the present disclosure.

A person skilled in the art will understand that he/she may refer to the working processes of the systems, devices and units in the above embodiments, since the working processes of the systems, devices and units are substantially the same. For convenience and brevity, these operations will not be described in detail.

It should be understood that the systems, devices, and methods disclosed in the embodiments of the present disclosure may be implemented in other ways. The above embodiments are merely exemplary. The division of cells is based on logic functions only, while other divisions exist in the implementation. Multiple units or components may be combined or integrated in another system. It is also possible to omit or skip certain features. On the other hand, the mutual coupling, direct coupling or communicative coupling shown or discussed can be achieved indirectly or communicatively via some port, device or element, whether electrically, mechanically or otherwise.

Units that are separate components for illustration are physically separate or not. The unit for displaying is a physical unit or not, i.e. located in one place or distributed over a plurality of network units. Some or all of the elements are used for purposes of the embodiments.

Furthermore, each functional unit in each embodiment may be integrated in one processing unit, may be physically independent, or may be integrated in one processing unit having two or more units.

If the software functional unit is implemented, used, or sold as a product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions proposed by the present disclosure can be implemented basically or partially in the form of software products. Alternatively, a part of the technical solution that is advantageous to the conventional technology may be implemented in the form of a software product. The software product in a computer is stored in a storage medium that includes a plurality of commands for a computing device (e.g., a personal computer, server, or network device) to perform all or a portion of the steps disclosed in embodiments of the present disclosure. The storage medium includes a USB disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a floppy disk, or other medium capable of storing program code.

While the present disclosure has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the disclosure is not to be limited to the disclosed embodiment, but is intended to cover various arrangements made without departing from the scope of the broadest interpretation of the appended claims.

Claims (80)

1. A user equipment for wireless communication, comprising:
a memory; and
a processor coupled to the memory, the processor configured to:
performing communication to at least one second user equipment through a sidelink interface; and
transmitting at least one data transport block to the at least one second user equipment using at least one sidelink resource of a sidelink resource pool, wherein the sidelink resource pool comprises a plurality of slots in a time domain and a plurality of physical resource blocks, PRBs, in a frequency domain, wherein the sidelink resource pool comprises at least one transmission time interval, TTI, region each having a slot length, at least one long TTI region each having an integer multiple of the slot length, and at least one short TTI region each having a slot length, and the at least one short TTI region comprises a plurality of short TTIs, each short TTI of the plurality of short TTIs having a length less than one slot length.
2. The user equipment of claim 1, wherein the sidelink resource pool in each slot comprises a guard period GP/automatic gain control AGC region, a control region for transmitting a physical sidelink control channel PSCCH carrying sidelink control information SCI, and a data region for transmitting a physical sidelink shared channel PSCCH for transmitting a plurality of sidelink data transport blocks TB.
3. The user equipment of claim 2, wherein the at least one long TTI region comprises a starting slot and at least one adjacent slot adjacent to the starting slot, and the processor is configured to map and transmit the sidelink data TB with a corresponding GP/AGC region and a corresponding control region for transmission of the PSSCH in the at least one adjacent slot.
4. The user equipment of claim 3, wherein the at least one long TTI region based on a network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side link resource pool is allocated on a carrier that is also being used for cellular uplink operation.
5. The user equipment of claim 3, if a carrier is configured or preconfigured by a network for sidelink transmission only, the last symbol of the at least one long TTI region is omitted as a reserved symbol, a null symbol, or a blank symbol and is used for mapping and transmission of a sidelink data TB.
6. The user equipment of claim 2, wherein the short TTIs are of the same length and the processor is configured to map and transmit the sidelink data TB with the short TTIs.
7. The user equipment of claim 6, wherein the at least one short TTI region based on a network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side link resource pool is allocated on a carrier that is also being used for cellular uplink operation.
8. The user equipment of claim 6, if a carrier is configured or preconfigured by a network for sidelink transmission only, a last symbol of the at least one short TTI region is omitted as a reserved symbol, a null symbol, or a blank symbol and used for mapping and transmission of a sidelink data TB.
9. The user equipment of claim 2, wherein the SCI comprises at least one of a TTI type, a TTI length, presence of the GP/AGC region and the PSCCH of the at least one long TTI region, a modulation and coding scheme, MCS, level, a transport block size, TBS, a redundancy version of a short TTI transmission, and a sequence of the short TTI transmission.
10. The user equipment of claim 9, wherein the TTI type is represented by two bits to provide three indications including the at least one TTI region, the at least one long TTI region, and the at least one short TTI region.
11. The user equipment of claim 9, wherein the TTI length is a length of the at least one long TTI region and is represented by two bits to provide four indications including 2, 3, 4, and 5 slots.
12. The user equipment of claim 9, wherein the TTI length is the length of each short TTI and is represented by two bits to provide four indications including 2, 3, 4, and 5 symbols.
13. The user equipment of claim 9, wherein when the length of each short TTI is 2, 3, 4, and 5 symbols, the number of short TTIs is 5, 3, 2, and 2, respectively.
14. The user equipment of claim 9, wherein the presence of the GP/AGC region and the PSCCH is represented by 1 bit.
15. The user equipment of claim 14, wherein the at least one long TTI region in a slot other than a start slot includes a portion of the data region instead of the GP/AGC region and the control region if the bit is enabled.
16. The user equipment of claim 2, wherein each slot has a fixed length of 14 symbols.
17. The user equipment of claim 2, wherein the GP/AGC region has a length of 1 to 2 symbols allocated at the beginning of the slot.
18. The user equipment of claim 2, wherein the control region has a length of 2 symbols.
19. The user equipment of claim 2, wherein the data region has a length of 10 to 11 symbols.
20. The user equipment of claim 1, wherein the sidelink resource pool comprises the at least one TTI region for slot-based transmissions, and the at least one long TTI region and the at least one short TTI region for non-slot-based transmissions.
21. A user equipment for wireless communication, comprising:
a memory; and
a processor coupled to the memory, the processor configured to:
performing communication to at least one second user equipment through a sidelink interface; and
receiving at least one data transport block from the at least one second user equipment using at least one sidelink resource of a sidelink resource pool, wherein the sidelink resource pool comprises a plurality of slots in a time domain and a plurality of physical resource blocks, PRBs, in a frequency domain, wherein the sidelink resource pool comprises at least one transmission time interval, TTI, region each having a slot length, at least one long TTI region each having an integer multiple of the slot length, and at least one short TTI region each having a slot length, and the at least one short TTI region comprises a plurality of short TTIs, each short TTI of the plurality of short TTIs having a length less than one slot length.
22. The user equipment of claim 21, wherein the sidelink resource pool in each slot comprises a guard period GP/automatic gain control AGC region, a control region for transmitting a physical sidelink control channel PSCCH carrying sidelink control information SCI, and a data region for transmitting a physical sidelink shared channel PSCCH for transmitting a plurality of sidelink data transport blocks TB.
23. The user equipment of claim 22, wherein the at least one long TTI region comprises a starting slot and at least one adjacent slot adjacent to the starting slot, and the processor is configured to receive and decode the sidelink data TB with a corresponding GP/AGC region and a corresponding control region in the at least one adjacent slot for receiving the PSSCH.
24. The user equipment of claim 23, wherein the at least one long TTI region based on a network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side link resource pool is allocated on a carrier that is also being used for cellular uplink operation.
25. The user equipment of claim 23, if a carrier is configured or preconfigured by a network for sidelink transmission only, a last symbol of the at least one long TTI region is omitted as a reserved symbol, a null symbol, or a blank symbol and used for mapping and transmission of a sidelink data TB.
26. The user equipment of claim 22, wherein the short TTIs are of the same length and the processor is configured to receive and decode the sidelink data TB utilizing the short TTIs.
27. The user equipment of claim 26, wherein the at least one short TTI region based on a network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side link resource pool is allocated on a carrier that is also being used for cellular uplink operation.
28. The user equipment of claim 26, if a carrier is configured or preconfigured by a network for sidelink transmission only, a last symbol of the at least one short TTI region is omitted as a reserved symbol, a null symbol, or a blank symbol and used for mapping and transmission of a sidelink data TB.
29. The user equipment of claim 22, wherein the SCI comprises at least one of a TTI type, a TTI length, presence of the GP/AGC region and the PSCCH of the at least one long TTI region, a modulation and coding scheme, MCS, level, a transport block size, TBS, a redundancy version of a short TTI transmission, and a sequence of the short TTI transmission.
30. The user equipment of claim 29, wherein the TTI type is represented by two bits to provide three indications including the at least one TTI region, the at least one long TTI region, and the at least one short TTI region.
31. The user equipment of claim 29, wherein the TTI length is a length of the at least one long TTI region and is represented by two bits to provide four indications including 2, 3, 4, and 5 slots.
32. The user equipment of claim 29, wherein the TTI length is the length of each short TTI and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 symbols.
33. The user equipment of claim 29, wherein when the length of each short TTI is 2, 3, 4, and 5 symbols, the number of short TTIs is 5, 3, 2, and 2, respectively.
34. The user equipment of claim 29, wherein the presence of the GP/AGC region and the PSCCH is represented by 1 bit.
35. The user equipment of claim 34, wherein the at least one long TTI region in a slot other than a starting slot includes a portion of the data region instead of the GP/AGC region and the control region if the bit is enabled.
36. The user equipment of claim 22, wherein each slot has a fixed length of 14 symbols.
37. The user equipment of claim 2, wherein the GP/AGC region has a length of 1 to 2 symbols allocated at the beginning of the slot.
38. The user equipment of claim 22, wherein the control region has a length of 2 symbols.
39. The user equipment of claim 22, wherein the data region has a length of 10 to 11 symbols.
40. The user equipment of claim 21, wherein the sidelink resource pool comprises the at least one TTI region for slot-based transmissions and the at least one long TTI region and the at least one short TTI region for non-slot-based transmissions.
41. A method of wireless communication of a user equipment, comprising:
performing communication to at least one second user equipment through a sidelink interface; and
transmitting at least one data transport block to the at least one second user equipment using at least one sidelink resource of a sidelink resource pool, wherein the sidelink resource pool comprises a plurality of slots in a time domain and a plurality of physical resource blocks, PRBs, in a frequency domain, wherein the sidelink resource pool comprises at least one transmission time interval, TTI, region each having a slot length, at least one long TTI region each having an integer multiple of the slot length, and at least one short TTI region each having a slot length, and the at least one short TTI region comprises a plurality of short TTIs each having a length less than one slot length.
42. The method of claim 41, wherein the sidelink resource pool in each slot comprises a guard period GP/Automatic Gain Control (AGC) region, a control region for transmitting a Physical Sidelink Control Channel (PSCCH) carrying Sidelink Control Information (SCI), and a data region for transmitting a Physical Sidelink Shared Channel (PSSCH) for transmitting a plurality of sidelink data Transport Blocks (TBs).
43. The method of claim 42, wherein the at least one long TTI region comprises a starting slot and at least one adjacent slot that is adjacent to the starting slot, and further comprising: mapping and transmitting the sidelink data TB with a corresponding GP/AGC region and a corresponding control region for transmitting the PSSCH in the at least one adjacent slot.
44. The method of claim 43, wherein the at least one long TTI region based on a network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side link resource pool is allocated on a carrier that is also being used for cellular uplink operation.
45. The method of claim 43, if a carrier is configured or preconfigured by a network for sidelink transmission only, the last symbol of the at least one long TTI region is omitted as a reserved symbol, a null symbol, or a blank symbol and used for mapping and transmission of a sidelink data TB.
46. The method of claim 42, wherein the short TTIs have the same length, and further comprising: mapping and transmitting the sidelink data TB utilizing the short TTI.
47. The method of claim 46, wherein the at least one short TTI region based on a network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side link resource pool is allocated on a carrier that is also being used for cellular uplink operation.
48. The method of claim 46, if a carrier is configured or preconfigured by a network for sidelink transmission only, a last symbol of the at least one short TTI region is omitted as a reserved symbol, a null symbol, or a blank symbol and used for mapping and transmission of a sidelink data TB.
49. The method of claim 42, wherein the SCI comprises at least one of a TTI type, a TTI length, a presence of the GP/AGC region and the PSCCH of the at least one long TTI region, a Modulation and Coding Scheme (MCS) level, a Transport Block Size (TBS), a redundancy version of a short TTI transmission, and a sequence of the short TTI transmissions.
50. The method of claim 49, wherein the TTI type is represented by two bits to provide three indications including the at least one TTI region, the at least one long TTI region, and the at least one short TTI region.
51. The method of claim 49, wherein the TTI length is a length of the at least one long TTI region and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 slots.
52. The method of claim 49, wherein the TTI length is the length of each short TTI and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 symbols.
53. The method of claim 49, wherein when the length of each short TTI is 2, 3, 4, and 5 symbols, the number of short TTIs is 5, 3, 2, and 2, respectively.
54. The method of claim 49, wherein the presence of the GP/AGC region and the PSCCH is represented by 1 bit.
55. The method of claim 54, wherein the at least one long TTI region in other slots than a starting slot includes a portion of the data region instead of the GP/AGC region and the control region if the bit is enabled.
56. The method of claim 42, wherein each slot has a fixed length of 14 symbols.
57. The method of claim 42, wherein the GP/AGC zone has a length of 1 to 2 symbols allocated at the beginning of the slot.
58. The method of claim 42, wherein the control region has a length of 2 symbols.
59. The method of claim 42, wherein the data region has a length of 10 to 11 symbols.
60. The method of claim 41, wherein the sidelink resource pool comprises the at least one TTI region of a slot-based transmission and the at least one long TTI region and the at least one short TTI region of a non-slot-based transmission.
61. A method of wireless communication of a user equipment, comprising:
performing communication to at least one second user equipment through a sidelink interface; and
receiving at least one data transport block from the at least one second user equipment using at least one sidelink resource of a sidelink resource pool, wherein the sidelink resource pool comprises a plurality of slots in a time domain and a plurality of physical resource blocks, PRBs, in a frequency domain, wherein the sidelink resource pool comprises at least one transmission time interval, TTI, region each having a slot length, at least one long TTI region each having an integer multiple of the slot length, and at least one short TTI region each having a slot length, and the at least one short TTI region comprises a plurality of short TTIs, each short TTI of the plurality of short TTIs having a length less than one slot length.
62. The method of claim 61, wherein the sidelink resource pool in each slot comprises a guard period GP/Automatic Gain Control (AGC) region, a control region for transmitting a Physical Sidelink Control Channel (PSCCH) carrying Sidelink Control Information (SCI), and a data region for transmitting a Physical Sidelink Shared Channel (PSSCH) for transmitting a plurality of sidelink data Transport Blocks (TBs).
63. The method of claim 62, wherein the at least one long TTI region comprises a starting slot and at least one adjacent slot that is adjacent to the starting slot, and further comprising: receiving and decoding the sidelink data TB using a corresponding GP/AGC region and a corresponding control region for receiving the PSSCH in the at least one adjacent slot.
64. The method of claim 63, wherein the at least one long TTI region based on a network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side link resource pool is allocated on a carrier that is also being used for cellular uplink operation.
65. The method of claim 63, if a carrier is configured or preconfigured by a network for sidelink transmission only, the last symbol of the at least one long TTI region is omitted as a reserved symbol, a null symbol, or a blank symbol and used for mapping and transmission of a sidelink data TB.
66. The method of claim 62, wherein the short TTIs have the same length, and further comprising: receiving and decoding the sidelink data TB utilizing the short TTI.
67. The method of claim 66, wherein the at least one short TTI region based on a network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side link resource pool is allocated on a carrier that is also being used for cellular uplink operation.
68. The method of claim 66, if a carrier is configured or preconfigured by a network for sidelink transmission only, the last symbol of the at least one short TTI region is omitted as a reserved symbol, a null symbol, or a blank symbol and used for mapping and transmission of a sidelink data TB.
69. The method of claim 63, wherein the SCI comprises at least one of a TTI type, a TTI length, a presence of the GP/AGC region and the PSCCH of the at least one long TTI region, a Modulation and Coding Scheme (MCS) level, a Transport Block Size (TBS), a redundancy version of a short TTI transmission, and a sequence of the short TTI transmissions.
70. The method of claim 69, wherein the TTI type is represented by two bits to provide three indications including the at least one TTI region, the at least one long TTI region, and the at least one short TTI region.
71. The method of claim 69, wherein the TTI length is a length of the at least one long TTI region and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 slots.
72. The method of claim 69, wherein the TTI length is the length of each short TTI and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 symbols.
73. The method of claim 69, wherein when the length of each short TTI is 2, 3, 4, and 5 symbols, the number of short TTIs is 5, 3, 2, and 2, respectively.
74. The method of claim 69, wherein the presence of the GP/AGC region and the PSCCH is represented by 1 bit.
75. The method of claim 74, wherein if the bit is enabled, the at least one long TTI region in other slots than a starting slot includes a portion of the data region instead of the GP/AGC region and the control region.
76. The method of claim 62, wherein each slot has a fixed length of 14 symbols.
77. The method of claim 62, wherein the GP/AGC zone has a length of 1 to 2 symbols allocated at the beginning of the slot.
78. The method of claim 62, wherein the control region has a length of 2 symbols.
79. The method of claim 62, wherein the data region has a length of 10 to 11 symbols.
80. The method of claim 62, wherein the sidelink resource pool comprises the at least one TTI region of a slot-based transmission and the at least one long TTI region and the at least one short TTI region of a non-slot-based transmission.
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