CN111480382B

CN111480382B - User equipment and wireless communication method thereof

Info

Publication number: CN111480382B
Application number: CN201880081134.7A
Authority: CN
Inventors: 林晖闵; 唐海
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-02-07
Filing date: 2018-02-07
Publication date: 2023-06-27
Anticipated expiration: 2038-02-07
Also published as: WO2019153147A1; CN111480382A

Abstract

A user device includes a memory and a processor coupled to the memory. The processor is configured to perform communication to at least one second user device via the sidelink interface and to transmit at least one data transport block to the at least one second user device using at least one sidelink resource of the sidelink resource pool. The side-uplink resource pool includes dimensions of a plurality of time slots in the time domain and a plurality of physical resource blocks in the frequency domain. The side-uplink 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 the plurality of short TTIs having 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 user equipment and wireless communication methods thereof.

2. Description of related Art

In Long Term Evolution (LTE) radio access technology, layer 1 (L1) transmission of data Transport Blocks (TBs) in downlink, uplink and side links (e.g., via an air interface (Uu) and a PC5 interface) is conventionally performed in units of one subframe, and the subframe has a fixed length of 1 ms, which is only a Transmission Time Interval (TTI) supported in a fourth generation (4G) system. That is, regardless of the size of the data TBs, each TB is channel coded, rate matched, resource Element (RE) mapped, and transmitted on a 1 millisecond subframe as a TTI duration.

Due to the increasing demand for emergency transmission of data via a side-link interface, such as a PC5 interface, to support public safety, road safety and mission critical communications, the data delay requirements for end-to-end communications are becoming very short. For example, in the third generation partnership project (3 GPP), the SA-WG1 work item has determined and specified a delay requirement for end-to-end data transmission, which can be as short as 10ms in a vehicle queuing operation, for which all UE signal processing time, inter-layer communication, L1 transmission, and relay must be covered if data needs to be transmitted from one end of the queue to the other. As another example, for fully unmanned operation, such as autonomous driving, fast and reliable communication between adjacent vehicles is critical for safe driving and maneuvering on a road, and for this case, the communication latency requirement is defined as 5 milliseconds or less. From the existing LTE side uplink technology, it is difficult to meet these requirements and there is no guarantee that it can meet these requirements due to the resource selection mechanism and fixed TTI length transmission as described previously. Thus, this has led to an increase in the need to support ultra-reliable and low latency communications (URLLC) in next generation wireless communication systems. Furthermore, the need to support enhanced broadband communications for high data rates and large data blocks has also been identified as a fundamental feature in support of more advanced vehicle-to-anything (V2X) applications, such as vehicle sensor data sharing.

For the upcoming and recently developed fifth generation new wireless (5G-NR) systems, which support longer subcarrier spacing (SCS) than the previous 4G-LTE, the 5G-NR system allows shorter transmission symbol lengths and enables the possibility of faster and shorter transmission of data packets in radio frames and time slots. However, if the side-uplink data transmission TTI is still associated with one slot of 14 symbols in a 5G-NR system and the retransmission of the data TB is scattered from slot to slot, it still cannot be ensured that the strict latency requirements of the data interaction on the NR side-link via 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 wireless (NR) side uplink communication in the same side uplink 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 at least one second user device over a sidelink interface and to transmit at least one data transport block to the at least one second user device using at least one sidelink resource of a sidelink resource pool. The side-uplink resource pool includes a plurality of slots in the time domain and dimensions (dimensions) of a plurality of Physical Resource Blocks (PRBs) in the frequency domain. The side-uplink 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 the plurality of short TTIs having a length less than one slot length.

According to an embodiment in combination with the first aspect of the present disclosure, the side-link resource pool in each time slot comprises a Guard Period (GP)/Automatic Gain Control (AGC) region, a control region for transmitting a physical side-link control channel (PSCCH) carrying side-link control information (SCI), and a data region for transmitting a physical side-link shared channel (PSSCH) to transmit a plurality of side-link data Transport Blocks (TBs).

According to an embodiment in combination with the first aspect of the present disclosure, the at least one long TTI region comprises a start time slot and at least one adjacent time slot adjacent to the start time slot, and the processor is configured to map and transmit side uplink data TB with a respective GP/AGC region and a respective control region for transmitting the PSSCH in the at least one adjacent time slot.

According to an embodiment in combination with the first aspect of the present disclosure, the at least one long TTI region based on the network configuration or pre-configuration comprises the last symbol reserved, emptied or blank when allocating the side uplink resource pool on the carrier which is also being used for cellular uplink operation.

According to an embodiment in combination with the first aspect of the present disclosure, if the carrier is configured or preconfigured by the network for side-link 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 the side-link data TB.

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

According to an embodiment in combination with the first aspect of the present disclosure, the at least one short TTI region based on the network configuration or pre-configuration comprises the last symbol reserved, emptied or blank when allocating the side uplink resource pool on the carrier which is also being used for cellular uplink operation.

According to an embodiment in combination with the first aspect of the present disclosure, if the carrier is configured or preconfigured by the network for side-link 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 is used for mapping and transmission of the side-link data TB.

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

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

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

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

According to an embodiment in combination with the first aspect of the present disclosure, each slot has a fixed length of 14 symbols.

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

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

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

According to an embodiment in combination with the first aspect of the present disclosure, the side-uplink resource pool comprises at least one TTI region of the slot-based transmission, and at least one long TTI region and at least one short TTI region of the 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 at least one second user equipment over a 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 a sidelink resource pool. The side-uplink resource pool includes a plurality of slots in a time domain and dimensions of a plurality of Physical Resource Blocks (PRBs) in a frequency domain. The side-uplink 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 the plurality of short TTIs having a length less than one slot length.

According to another embodiment in combination with the second aspect of the present disclosure, the sidelink resource pool in each time 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).

According to another embodiment in combination with the second aspect of the present disclosure, the at least one long TTI region comprises a start time slot and at least one adjacent time slot adjacent to the start time slot, and the processor is configured to receive and decode the side uplink data TB using the respective GP/AGC region and the respective control region for receiving the PSSCH in the at least one adjacent time slot.

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

According to another embodiment in combination with the second aspect of the present disclosure, if the carrier is configured or preconfigured by the network for only side-uplink transmission, 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 reception and decoding of the side-uplink data TB.

According to another embodiment in combination with the second aspect of the present disclosure, the short TTI is of the same length, and the processor is configured to receive and decode the side uplink data TB with the short TTI.

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

According to another embodiment in combination with the second aspect of the present disclosure, if the carrier is configured or preconfigured by the network for only side-uplink transmission, 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 is used for reception and decoding of the side-uplink data TB.

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

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

According to another embodiment in combination with the second aspect of the present disclosure, the presence of GP/AGC region and 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 a time slot other than the start time slot comprises a portion of the data region, instead of comprising the GP/AGC region and the control region.

According to another embodiment in combination with the second aspect of the present disclosure, each slot has a fixed length of 14 symbols.

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

According to another embodiment in combination with the second aspect of the present disclosure, the control area has a length of 2 symbols.

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

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

In a third aspect of the present disclosure, a wireless communication method of a user equipment includes: communication is performed to the at least one second user equipment over the sidelink interface and the at least one data transport block is transmitted to the at least one second user equipment using at least one sidelink resource of the sidelink resource pool. The side-uplink resource pool includes a plurality of slots in a time domain and dimensions of a plurality of Physical Resource Blocks (PRBs) in a frequency domain. The side-uplink 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 the plurality of short TTIs having 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 time 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).

According to another embodiment in combination with the third aspect of the present 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 method further comprises: the transmission side uplink data TB is mapped and transmitted using a corresponding GP/AGC region and a corresponding control region for transmitting the PSSCH 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 the network configuration or pre-configuration comprises the last symbol reserved, emptied or blank when the side uplink resource pool is allocated on the carrier which is also being used for cellular uplink operation.

According to another embodiment in combination with the third aspect of the present disclosure, if the carrier is configured or preconfigured by the network for side-link 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 the side-link data TB.

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

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

According to another embodiment in combination with the third aspect of the present disclosure, if the carrier is configured or preconfigured by the network for side-link 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 is used for mapping and transmission of the side-link data TB.

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

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 in combination with 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 comprising 2, 3, 4 and 5 slots.

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

According to another embodiment in combination with the third aspect of the present disclosure, the presence of GP/AGC region and 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 a time slot other than the start time slot comprises a portion of the data region, instead of comprising the GP/AGC region and the control region.

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

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

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

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

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

In a fourth aspect of the present disclosure, a wireless communication method of a user equipment includes: communication is performed to the at least one second user equipment over the sidelink interface and at least one data transport block is received from the at least one second user equipment using at least one sidelink resource of the sidelink resource pool. The side-uplink resource pool includes a plurality of slots in a time domain and dimensions of a plurality of Physical Resource Blocks (PRBs) in a frequency domain. The side-uplink 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 the plurality of short TTIs having a length less than one slot length.

According to another embodiment in combination with the fourth aspect of the present disclosure, the sidelink resource pool in each time 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).

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

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

According to another embodiment in combination with the fourth aspect of the present disclosure, if the carrier is configured or preconfigured by the network for only side-uplink transmission, 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 reception and decoding of the side-uplink data TB.

According to a further embodiment in combination with the fourth aspect of the present disclosure, the short TTIs have the same length, and the method further comprises: the side downlink data TB is received and decoded using a short TTI.

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

According to another embodiment in combination with the fourth aspect of the present disclosure, if the carrier is configured or preconfigured by the network for only side-uplink transmission, 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 is used for reception and decoding of the side-uplink data TB.

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

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

According to another embodiment in combination with the fourth aspect of the present disclosure, the presence of GP/AGC region and 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 a time slot other than the start time slot comprises a portion of the data region, instead of comprising the GP/AGC region and the control region.

According to another embodiment in combination with the fourth aspect of the present disclosure, each slot has a fixed length of 14 symbols.

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

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

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

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

In embodiments 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 wireless (NR) side uplink communications in the same side uplink resource pool, to provide fast and reliable data transmission for NR side uplink communications with short TTI structures and data repetition, to perform enhanced support for large-sized data transport blocks to use long TTI structures, and/or to flexibly use side uplink resource pools, to facilitate coexistence and coordinated operation of all normal TTI, long TTI, and short TTI transmissions.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or related techniques, the following drawings, which will be illustrated in the embodiments, are briefly described. It is to be understood that the drawings are merely illustrative of some embodiments of the present disclosure and that other drawings may be derived from them by a person of ordinary skill in the art without paying attention.

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 side-uplink resource pool according to an embodiment of the present disclosure.

Fig. 3 is a block diagram of at least one long Transmission Time Interval (TTI) region according to an embodiment of the disclosure.

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

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

Fig. 6A is a flow chart illustrating a wireless communication method according to the present disclosure in terms of operation of a user device for transmitting signals.

Fig. 6B is a flowchart illustrating a wireless communication method according to the present disclosure from an operational aspect of a user equipment for transmitting signals.

Fig. 7A is a flow chart illustrating a wireless communication method according to the present disclosure in terms of operation of a user device for receiving signals.

Fig. 7B is a flowchart illustrating a wireless communication method according to the present disclosure from an operational aspect of a user equipment for receiving a signal.

Detailed description of the embodiments

Embodiments of the present disclosure are described in detail below by way of technical subject matter, structural features, achieved objects, and effects with reference to the accompanying drawings. In particular, the terminology used in the embodiments of the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the 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 communication to the at least one second user equipment 200 via a side-link 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 side-link resource of the side-link resource pool 300. The side-uplink resource pool 300 includes dimensions of a plurality of slots in the time domain and a plurality of Physical Resource Blocks (PRBs) in the frequency domain. The side-uplink 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 the plurality of short TTIs having 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, a Guard Period (GP)/Automatic Gain Control (AGC) region 301, a control region 302, and a data region 303 are arranged in sequence. 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 the 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 a transmission side uplink data Transport Block (TB). The side-uplink resource pool 300 includes at least one TTI region 310 or 312 (e.g., a normal TTI region) for slot-based transmission, and at least one

long TTI region

320 or 322 and at least one short TTI region 330 for non-slot-based transmission.

In embodiments of the present disclosure, user equipment 100 provides at least one of a TTI region, a long TTI region, and a short TTI region for new wireless (NR) side-link communications in the same side-link resource pool 300 to provide fast and reliable data transmission for NR side-link communications with a short TTI structure (e.g., at least one short TTI region 330) and data repetition, performs enhanced support for large-sized data Transport Blocks (TBs) to use the long TTI structure, and/or flexibly uses the side-link resource pool, facilitating coexistence and coordinated operation of transmissions for all normal TTIs, long TTIs, and short TTIs.

In particular, the user equipment 100 may be a user equipment for transmitting signals, and the user equipment 200 may be a user equipment for receiving signals. In some embodiments, communication between user equipment 100 and user equipment 200 via a side-link interface, such as a PC5 interface, may be based on Long Term Evolution (LTE) side-link technology developed under the third generation partnership project (3 GPP) and/or radio access technology of the 5 th generation new radio (5G-NR).

Fig. 1 and 2 also illustrate that in some embodiments, at least one user device 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 side-link 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 side-link resource of the side-link 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 Application Specific Integrated Circuits (ASICs), other chipsets, logic circuits, and/or data processing devices. The

processors

104 and 204 may each also include baseband circuitry to process radio frequency signals. When the embodiments are implemented in the form of 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.

Furthermore, fig. 1 and 2 illustrate 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 (PSSCH) 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 side uplink data TB using a corresponding GP/AGC region 322 and a corresponding control region 323 for transmitting the PSSCH 321 in at least one adjacent slot. The processor 204 is configured to receive and decode the side uplink data TB using a corresponding GP/AGC region 322 and a corresponding control region 323 for receiving the PSSCH 321 in at least one adjacent slot. The at least one long TTI region 320 comprises the last symbol when the side uplink resource pool 300 is allocated on a carrier, e.g. a blank/empty/reserved last symbol. The SCI includes at least one of a TTI type, a TTI length, a GP/AGC region of the at least one long TTI region 320, and a presence of a PSCCH, a Modulation and Coding Scheme (MCS) level, a Transport Block Size (TBS), a redundancy version of a short TTI transmission, and a sequence of short TTI transmissions.

In some embodiments, the TTI length may be the length of at least one long TTI region and 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 the 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 represented by two bits to provide four indications including 2, 3, 4, and 5 symbols. When each short TTI is 2, 3, 4 and 5 symbols in length, 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 can be the length of at least one TTI region (e.g., a normal TTI region).

In some embodiments, the presence of GP/AGC region 322 and PSCCH 323 is represented by 1 bit. If the bit is enabled, at least one long TTI region 320 in 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, such as 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 side uplink data TBs with

short TTIs

331, 332 and 333. The processor 204 is configured to receive and decode the side uplink data TBs using the

short TTIs

331, 332 and 333. At least one short TTI region 330 includes the last symbol 336, e.g., the last symbol of blank/empty/reserved, when the side-link resource pool 300 is allocated on a carrier.

Some examples are shown in fig. 3 and 4. Fig. 3 illustrates at least one long TTI region 320 over a length of 2 slots, in some embodiments, by way of example. Wherein the pre-allocated GP/AGC region 322 and control region 323 in a second time slot adjacent to the first time slot are to be used for mapping and transmission of data TBs (PSSCHs) and the last symbol 324 of at least one long TTI region 320 in the data region 321 for a PSSCH is reserved/nulled/blank for cellular uplink transmission when the side uplink resource pool 300 is configured on a carrier coexisting with cellular Uplink (UL) transmission. If the carrier is configured or preconfigured by the network for only side-link transmission, the last symbol 324 (e.g., reserved/empty/blank symbol) may be omitted and used for mapping and transmission of the side-link data TB.

Fig. 4 illustrates at least one short TTI region 330 within a slot, in some embodiments, by way of example. Wherein a plurality of

short TTIs

331, 332 and 333 of equal transmission length are mapped in a data region 334 for the PSSCH, and each short TTI (sTTI) is used only for mapping of data TBs. That is, the associated scheduling control information for the short TTI is provided in the control region 335 for the PSCCH. When the side uplink resource pool 300 is configured on a carrier that co-exists with a cellular Uplink (UL) transmission, the last symbol 336 or last plurality of symbols 336 of a slot in the data zone 334 for the PSSCH is reserved/nulled/blanked for the cellular uplink transmission. If the carrier is network configured or preconfigured for only side-link transmission, the last symbol 336 (e.g., reserved/empty/blank symbol) may be omitted and used for mapping and transmission of side-link data TBs.

Fig. 5 illustrates that in some embodiments, communication between user device 100 and user device 200 involves vehicle-to-vehicle (V2X) communication in accordance with LTE-side uplink technology and/or 5G-NR wireless access technology developed under the third generation partnership project (3 GPP) of release 14, wherein V2X communication includes vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), and vehicle-to-infrastructure/network (V2I/N). The

user devices

100 and 200 communicate directly with each other via a side-uplink 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 the operation of a user device 100 for transmitting signals. Methods 400 and 400' each include: at block 402, communication is performed to at least one user equipment 200 via a sidelink interface, and at block 404, 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. The side-uplink resource pool 300 includes dimensions of a plurality of slots in the time domain and a plurality of Physical Resource Blocks (PRBs) in the frequency domain. The side-uplink 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

TTI region

310 or 312 is, for example, a normal TTI region.

In embodiments 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 wireless (NR) side uplink communications in the same side uplink resource pool 300 to provide fast and reliable data transmission for NR side uplink communications with a short TTI structure (e.g., at least one short TTI region 330) and data repetition, performs enhanced support for large-sized data Transport Blocks (TBs) to use the long TTI structure, and/or flexibly uses the side uplink resource pool, facilitating coexistence and coordinated operation of transmissions for all normal TTIs, long TTIs, and short TTIs.

Fig. 6A also shows a method 400 that also includes block 406. At block 406, the transmission side uplink data TB is mapped and transmitted using a corresponding GP/AGC region and a corresponding control region for transmitting the PSSCH in at least one adjacent slot.

Fig. 6B also shows a method 400' that also includes block 408. At block 408, the transmission side uplink data TB is mapped and transmitted using the short TTI.

Fig. 7A and 7B illustrate two methods 500 and 500' of wireless communication according to the present disclosure in terms of the operation of a user device 200 for receiving signals. The methods 500 and 500' include: at block 502, communication is performed to at least one user equipment 100 via a sidelink interface, and at block 504, 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. The side-uplink resource pool 300 includes dimensions of a plurality of slots in the time domain and a plurality of Physical Resource Blocks (PRBs) in the frequency domain. The side-uplink 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

TTI region

310 or 312 is, for example, a normal TTI region.

In embodiments of the present disclosure, user equipment 200 receives at least one of a TTI region, a long TTI region, and a short TTI region in the same side-link resource pool 300 for new wireless (NR) side-link communications to provide fast and reliable data transmission for NR side-link communications with a short TTI structure (e.g., at least one short TTI region 330) and data repetition, performs enhanced support for large-sized data Transport Blocks (TBs) to use the long TTI structure, and/or flexibly uses the side-link resource pool, facilitating 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 further includes block 506. At block 506, the side uplink data TB is received and decoded using a corresponding GP/AGC region and a corresponding control region for receiving the PSSCH in at least one adjacent slot.

Fig. 7B also shows a method 500' that, in some embodiments, further includes block 508. At block 508, the side uplink data TB is received and decoded with a short TTI.

In embodiments 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 wireless (NR) side uplink communications in the same side uplink resource pool, to provide fast and reliable data transmission for NR side uplink communications with a short TTI structure and data repetition, to perform enhanced support for large-sized data transport blocks to use the long TTI structure, and/or to flexibly use the side uplink resource pool, to facilitate coexistence and coordinated operation of transmissions for all normal TTIs, long TTIs, and short TTIs.

Those of ordinary skill in the art will appreciate that each of the units, algorithms, and steps described and disclosed in the embodiments of the disclosure are implemented using electronic hardware, or a combination of software and electronic hardware for a computer. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the particular implementation. One 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.

One of ordinary skill in the art will appreciate that he/she may refer to the operation of the systems, devices and units of the above embodiments because the operation of the systems, devices and units are substantially the same. For ease of description 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-described embodiments are merely exemplary. The partitioning of the cells is based solely on logic functions, while other partitions exist in the implementation. Multiple units or components may be combined or integrated in additional systems. 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 in communication through some ports, devices or units, whether in electrical, mechanical or other type of form.

The units as separate parts for illustration are physically separate or not. The units for displaying are physical units or not physical units, i.e. located in one place or distributed over a plurality of network units. Some or all of the units are used according to the purpose of the embodiment.

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

If the software functional unit is implemented, used and sold as a product, it may be stored in a readable storage medium of a computer. Based on this understanding, the technical solutions proposed by the present disclosure may be implemented substantially or partly in the form of a software product. Alternatively, a part of the technical solution beneficial to the conventional technology may be implemented in the form of a software product. The software product in the 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 execute all or part of the steps disclosed by 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 present disclosure is not limited to the disclosed embodiment, but is intended to cover various arrangements made without departing from the scope of the appended claims in its broadest interpretation.

Claims

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 side uplink interface; and

transmitting at least one data transmission block to the at least one second user equipment using at least one side-uplink resource of a side-uplink resource pool, wherein the side-uplink resource pool comprises a plurality of time slots in a time domain and dimensions of a plurality of physical resource blocks, PRBs, in a frequency domain, wherein the side-uplink resource pool comprises at least one transmission time interval, TTI, region of a time slot based transmission and at least one long TTI region and at least one short TTI region of a non-time slot based transmission;

wherein the one long TTI region has an integer multiple of a slot length, the one short TTI region has a slot length, and the one short TTI region includes a plurality of short TTIs, each of the plurality of short TTIs having a same length less than the one slot length, each of the short TTIs having a length comprising: 2. 3, 4 or 5 symbols;

Wherein said pool of side-link resources in each time slot comprises a guard period GP/automatic gain control AGC region, a control region for transmitting a physical side-link control channel PSCCH carrying side-link control information SCI, and a data region for transmitting a physical side-link shared channel PSSCH for transmitting a plurality of side-link data transport blocks TB.

2. The user equipment of claim 1, wherein the one long TTI region includes a start slot and at least one adjacent slot adjacent to the start slot, and the processor is configured to map and transmit the side uplink data TB with a respective GP/AGC region and a respective control region for transmitting the PSSCH in the at least one adjacent slot.

3. The user equipment of claim 2, wherein the one long TTI region based on network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side uplink resource pool is allocated on a carrier that is also being used for cellular uplink operation.

4. The user equipment of claim 2, wherein the last symbol of the 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 side-uplink data TBs if the carrier is configured or preconfigured by the network for side-uplink transmission only.

5. The user equipment of claim 1 wherein the processor is configured to map and transmit the side uplink data TB with the short TTI.

6. The user equipment of claim 5, wherein the one short TTI region based on network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side uplink resource pool is allocated on a carrier that is also being used for cellular uplink operation.

7. The user equipment of claim 5, wherein the last symbol of the one short TTI region is omitted as a reserved symbol, a null symbol or a blank symbol and is used for mapping and transmission of a side uplink data TB if a carrier is configured or preconfigured by the network for only side uplink transmission.

8. The user equipment of claim 1, 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 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.

9. The user equipment of claim 8, wherein the TTI type is represented by two bits to provide three indications comprising the one TTI region, the one long TTI region, and the one short TTI region.

10. The user equipment of claim 8, wherein the TTI length is a length of the one long TTI region and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 slots.

11. The user equipment of claim 8, wherein the TTI length is a length of each short TTI and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 symbols.

12. The user equipment of claim 8, 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.

13. The user equipment of claim 8, wherein the presence of the GP/AGC region and the PSCCH is represented by 1 bit.

14. The user equipment of claim 13, wherein if the bit is enabled, the one long TTI region comprises a portion of the data region other than the GP/AGC region and the control region in other slots than a starting slot.

15. The user equipment of claim 1, wherein each slot has a fixed length of 14 symbols.

16. The user equipment of claim 1, wherein the GP/AGC region has a length of 1 to 2 symbols allocated at a beginning of the slot.

17. The user equipment of claim 1, wherein the control region has a length of 2 symbols.

18. The user equipment of claim 2, wherein the data region has a length of 10 to 11 symbols.

19. A user equipment for wireless communication, comprising:

a memory; and

a processor coupled to the memory, the processor configured to:

receiving at least one data transmission block from the at least one second user equipment using at least one side-uplink resource of a side-uplink resource pool, wherein the side-uplink resource pool comprises a plurality of time slots in a time domain and dimensions of a plurality of physical resource blocks, PRBs, in a frequency domain, wherein the side-uplink resource pool comprises at least one transmission time interval, TTI, region of a time slot based transmission and at least one long TTI region and at least one short TTI region of a non-time slot based transmission;

wherein the one long TTI region has an integer multiple of a slot length, the one short TTI region has a slot length, and the at least one short TTI comprises a plurality of short TTIs, each of the plurality of short TTIs having a same length less than the one slot length, each of the short TTIs having a length comprising: 2. 3, 4 or 5 symbols;

20. The user equipment of claim 19, wherein the one long TTI region includes a start slot and at least one adjacent slot adjacent to the start slot, and the processor is configured to receive and decode the side uplink data TB using a corresponding GP/AGC region and a corresponding control region for receiving the PSSCH in the at least one adjacent slot.

21. The user equipment of claim 20, wherein the one long TTI region based on network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side uplink resource pool is allocated on a carrier that is also being used for cellular uplink operation.

22. The user equipment of claim 20, wherein the last symbol of the one long TTI region is omitted as a reserved symbol, a null symbol or a blank symbol, and is used for reception and decoding of a side-uplink data TB, if a carrier is configured or preconfigured by the network for only side-uplink transmission.

23. The user equipment of claim 19 wherein the processor is configured to receive and decode the side-uplink data TB utilizing the short TTI.

24. The user equipment of claim 23, wherein the one short TTI region based on network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side uplink resource pool is allocated on a carrier that is also being used for cellular uplink operation.

25. The user equipment of claim 23, wherein the last symbol of the one short TTI region is omitted as a reserved symbol, a null symbol or a blank symbol, and is used for reception and decoding of a side-uplink data TB, if a carrier is configured or preconfigured by the network for only side-uplink transmission.

26. The user equipment of claim 19, 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 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.

27. The user equipment of claim 26, wherein the TTI type is represented by two bits to provide three indications comprising the one TTI region, the one long TTI region, and the one short TTI region.

28. The user equipment of claim 26, wherein the TTI length is a length of the one long TTI region and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 slots.

29. The user equipment of claim 26, wherein the TTI length is a length of each short TTI and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 symbols.

30. The user equipment of claim 26, wherein when the length of each short TTI is 2, 3, 4, and 5 symbols, respectively, the number of short TTIs is 5, 3, 2, and 2.

31. The user equipment of claim 26, wherein the presence of the GP/AGC region and the PSCCH is represented by 1 bit.

32. The user equipment of claim 31, wherein, if the bit is enabled, the one long TTI region comprises a portion of the data region, other than the GP/AGC region and the control region, in other slots than a starting slot.

33. The user equipment of claim 19, wherein each slot has a fixed length of 14 symbols.

34. The user equipment of claim 19, wherein the GP/AGC region has a length of 1 to 2 symbols allocated at the beginning of the slot.

35. The user equipment of claim 19, wherein the control region has a length of 2 symbols.

36. The user equipment of claim 19, wherein the data region has a length of 10 to 11 symbols.

37. A method of wireless communication for a user device, comprising:

wherein the one long TTI region has an integer multiple of a slot length, the one short TTI region has a slot length, and the one short TTI region comprises a plurality of short TTIs, each of the plurality of short TTIs having a same length less than the one slot length, each of the short TTIs having a length comprising: 2. 3, 4 or 5 symbols;

38. The method of claim 37, wherein the one long TTI region includes a start slot and at least one adjacent slot adjacent to the start slot, and the method further comprises: the side uplink data TB is mapped and transmitted using a corresponding GP/AGC region and a corresponding control region for transmitting the PSSCH in the at least one adjacent slot.

39. The method of claim 38, wherein the one long TTI region based on network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side uplink resource pool is allocated on a carrier that is also being used for cellular uplink operation.

40. The method of claim 39, wherein the last symbol of the 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 side-uplink data TB, if the carrier is configured or preconfigured by the network for only side-uplink transmission.

41. The method of claim 37, further comprising: when the at least one side-link resource comprises one short TTI region, the side-link data TB is mapped and transmitted using the short TTI.

42. The method of claim 41, wherein the one short TTI region based on network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side uplink resource pool is allocated on a carrier that is also being used for cellular uplink operation.

43. The method of claim 41, wherein the last symbol of the one short TTI region is omitted as a reserved symbol, a null symbol, or a blank symbol and used for mapping and transmission of the side uplink data TB if the carrier is configured or preconfigured by the network for only side uplink transmission.

44. The method of claim 37, wherein the SCI comprises at least one of a TTI type, a TTI length, a presence of the GP/AGC region of the one long TTI region and the PSCCH, 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.

45. The method of claim 44, wherein the TTI type is represented by two bits to provide three indications comprising the one TTI region, the one long TTI region, and the one short TTI region.

46. The method of claim 44, wherein the TTI length is a length of the one long TTI region and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 slots.

47. The method of claim 44, wherein the TTI length is a length of each short TTI and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 symbols.

48. The method of claim 44, 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.

49. The method of claim 44 wherein the presence of the GP/AGC region and the PSCCH is represented by 1 bit.

50. The method of claim 49, wherein if the bit is enabled, the one long TTI region includes a portion of the data region, other than the GP/AGC region and the control region, in other slots than a starting slot.

51. The method of claim 37, wherein each slot has a fixed length of 14 symbols.

52. The method of claim 37 wherein the GP/AGC region has a length of 1 to 2 symbols allocated at the beginning of the slot.

53. The method of claim 37, wherein the control region has a length of 2 symbols.

54. The method of claim 37, wherein the data region has a length of 10 to 11 symbols.

55. A method of wireless communication for a user device, comprising:

56. The method of claim 55, wherein the one long TTI region includes a start slot and at least one adjacent slot adjacent to the start slot, and the method further comprises: the side uplink data TB is received and decoded using a corresponding GP/AGC region and a corresponding control region for receiving the PSSCH in the at least one adjacent slot.

57. The method of claim 56, wherein the one long TTI region based on network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side uplink resource pool is allocated on a carrier that is also being used for cellular uplink operation.

58. The method of claim 56, wherein the last symbol of the one long TTI region is omitted as a reserved symbol, a null symbol, or a blank symbol, and is used for reception and decoding of a side-uplink data TB, if the carrier is configured or preconfigured by the network for only side-uplink transmissions.

59. The method of claim 55, further comprising: when the at least one side-link resource comprises one short TTI region, the side-link data TB is received and decoded using the short TTI.

60. The method of claim 59, wherein the one short TTI region based on network configuration or pre-configuration comprises a last symbol reserved, nulled, or blank when the side uplink resource pool is allocated on a carrier that is also being used for cellular uplink operation.

61. The method of claim 59, wherein the last symbol of the one short TTI region is omitted as a reserved symbol, a null symbol, or a blank symbol, and is used for reception and decoding of a side-uplink data TB, if the carrier is configured or preconfigured by the network for only side-uplink transmission.

62. The method of claim 56 wherein the SCI includes at least one of a TTI type, a TTI length, a presence of the GP/AGC region of the one long TTI region and the PSCCH, 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.

63. The method of claim 62, wherein the TTI type is represented by two bits to provide three indications comprising the one TTI region, the one long TTI region, and the one short TTI region.

64. The method of claim 62, wherein the TTI length is a length of the one long TTI region and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 slots.

65. The method of claim 62, wherein the TTI length is a length of each short TTI and is represented by two bits to provide four indications comprising 2, 3, 4, and 5 symbols.

66. The method of claim 62, wherein when the length of each short TTI is 2, 3, 4, and 5 symbols, respectively, the number of short TTIs is 5, 3, 2, and 2.

67. The method of claim 62, wherein the presence of the GP/AGC region and the PSCCH is represented by 1 bit.

68. The method of claim 67, wherein if the bit is enabled, the one long TTI region includes a portion of the data region, other than the GP/AGC region and the control region, in other slots than a starting slot.

69. The method of claim 55, wherein each slot has a fixed length of 14 symbols.

70. The method of claim 55 wherein the GP/AGC region has a length of 1 to 2 symbols allocated at the beginning of the slot.

71. The method of claim 55, wherein the control region has a length of 2 symbols.

72. The method of claim 55, wherein the data region has a length of 10 to 11 symbols.

73. A computer readable storage medium storing computer readable instructions which, when executed by a processor, cause the processor to perform the method of any one of claims 37 to 54.

74. A computer readable storage medium storing computer readable instructions which, when executed by a processor, cause the processor to perform the method of any one of claims 55 to 72.