TECHNICAL FIELD

The present application relates generally to synchronization signal design. More specifically, this disclosure relates to NR-SS sequence design in an advanced wireless communication system.

BACKGROUND

In a wireless communication network, a network access and a radio resource management (RRM) are enabled by physical layer synchronization signals and higher (MAC) layer procedures. In particular, a UE attempts to detect the presence of synchronization signals along with at least one cell identification (ID) for initial access. Once the UE is in the network and associated with a serving cell, the UE monitors several neighboring cells by attempting to detect their synchronization signals and/or measuring the associated cell-specific reference signals (RSs). For next generation cellular systems such as third generation partnership-new radio access or interface (3GPP-NR), efficient and unified radio resource acquisition or tracking mechanism which works for various use cases such as enhanced mobile broadband (eMBB), ultra reliable low latency (URLLC), massive machine type communication (mMTC), each corresponding to a different coverage requirement and frequency bands with different propagation losses is desirable. Most likely designed with a different network and radio resource paradigm, seamless and low-latency RRM is also desirable.

SUMMARY

Embodiments of the present disclosure provide a synchronization signal design in an advanced wireless communication system.

In one embodiment, a base station (BS) for transmitting synchronization signals in a wireless communication system is provided. The BS comprises at least one processor configured to generate a primary synchronization signal (PSS) including one of multiple PSS sequences that is generated based on a M-sequence of length 127 in a frequency domain, wherein the PSS includes part of cell identification (ID) information using a cyclic shift performed on the M-sequence generating the PSS; and generate a secondary synchronization signal (SSS) including one of multiple SSS sequences that is generated based on multiple M-sequences of length 127 in the frequency domain, wherein the SSS includes the cell identification (ID) information using cyclic shift performed on the multiple M-sequence generating the SSS. The BS further comprises a transceiver configured to transmit, to a user equipment (UE), the PSS and the SSS over downlink channels.

In another embodiment, a method of a base station (BS) for transmitting synchronization signals in a wireless communication system is provided. The method comprises generating a primary synchronization signal (PSS) including one of multiple PSS sequences that is generated based on a M-sequence of length 127 in a frequency domain, wherein the PSS includes part of cell identification (ID) information using a cyclic shift performed on the M-sequence generating the PSS; generating a secondary synchronization signal (SSS) including one of multiple SSS sequences that is generated based on multiple M-sequences of length 127 in the frequency domain, wherein the SSS indicates the cell identification (ID) information using cyclic shifts performed on the multiple M-sequences generating the SSS; and transmitting, to a user equipment (UE), the PSS and SSS over downlink channels.

In yet another embodiment, a user equipment (UE) for transmitting synchronization signals in a wireless communication system is provided. The UE comprises a transceiver configured to receive and detect, from a base station (BS), a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) over downlink channels. The UE further comprises at least one processor configured to determine the PSS including one of multiple PSS sequences that is generated based on a M-sequence of length 127 in a frequency domain, wherein the PSS includes part of cell identification (ID) information using a cyclic shift performed on the M-sequence generating the PSS; and determine the SSS including one of multiple SSS sequences that is generated based on multiple M-sequences of length-127 in the frequency domain, wherein the SSS indicates the cell identification (ID) information using cyclic shifts performed on the multiple M-sequences generating the SSS.

Other technical features may be readily apparent to one skilled in the art from the following figures, descriptions, and claims.

Before undertaking the DETAILED DESCRIPTION below, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document. The term “couple” and its derivatives refer to any direct or indirect communication between two or more elements, whether or not those elements are in physical contact with one another. The terms “transmit,” “receive,” and “communicate,” as well as derivatives thereof, encompass both direct and indirect communication. The terms “include” and “comprise,” as well as derivatives thereof, mean inclusion without limitation. The term “or” is inclusive, meaning and/or. The phrase “associated with,” as well as derivatives thereof, means to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, have a relationship to or with, or the like. The term “controller” means any device, system or part thereof that controls at least one operation. Such a controller may be implemented in hardware or a combination of hardware and software and/or firmware. The functionality associated with any particular controller may be centralized or distributed, whether locally or remotely. The phrase “at least one of,” when used with a list of items, means that different combinations of one or more of the listed items may be used, and only one item in the list may be needed. For example, “at least one of: A, B, and C” includes any of the following combinations: A, B, C, A and B, A and C, B and C, and A and B and C.

Moreover, various functions described below can be implemented or supported by one or more computer programs, each of which is formed from computer readable program code and embodied in a computer readable medium. The terms “application” and “program” refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, related data, or a portion thereof adapted for implementation in a suitable computer readable program code. The phrase “computer readable program code” includes any type of computer code, including source code, object code, and executable code. The phrase “computer readable medium” includes any type of medium capable of being accessed by a computer, such as read only memory (ROM), random access memory (RAM), a hard disk drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory. A “non-transitory” computer readable medium excludes wired, wireless, optical, or other communication links that transport transitory electrical or other signals. A non-transitory computer readable medium includes media where data can be permanently stored and media where data can be stored and later overwritten, such as a rewritable optical disc or an erasable memory device.

Definitions for other certain words and phrases are provided throughout this patent document. Those of ordinary skill in the art should understand that in many if not most instances, such definitions apply to prior as well as future uses of such defined words and phrases.

