# US 2019/0174269 A1 · Broadcast signal frame generating apparatus and broadcast signal frame generating method using layered division multiplexing

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- Number: US 2019/0174269 A1
- Document ID: US20190174269A1
- Status: Published application
- Kind: A1
- Application number: 16/261,375
- Filed: 2019-01-29
- Published: 2019-06-06
- Earliest claimed: 2015-03-06
- Assignees: Electronics and Telecommunications Research Institute
- Applicants: Electronics and Telecommunications Research Institute
- Inventors: Jae-Young LEE; Sung-Ik PARK; Bo-Mi LIM; Sun-Hyoung KWON; Heung-Mook KIM
- Web page: https://patentgrep.com/patent/US20190174269A1

## CPC

- H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04J 11/00: Orthogonal multiplex systems, {e.g. using WALSH codes}(H04J13/00 takes precedence)
- H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)}
- H04L 1/0083: {Formatting with frames or packets; Protocol or part of protocol for error control}
- H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH}
- H04L 12/184: {with heterogeneous receivers, e.g. layered multicast}
- H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence)
- H04L 27/2602: {Signal structure}
- H04L 27/2605: {Symbol extensions, e.g. Zero Tail, Unique Word [UW]}
- H04L 27/2613: {Structure of the reference signals}
- H04W 52/346: {distributing total power among users or channels}
- H04J 2011/0013: {with TDM/TDMA}
- H04L 1/0058: {Block-coded modulation}
- H04L 27/26136: {Pilot sequence conveying additional information}
- H04L 2001/0093: {Point-to-multipoint}
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

An apparatus and method for broadcast signal frame using layered division multiplexing are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal at different power levels; a power normalizer configured to reduce the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling, start position information of Physical Layer Pipes (PLPs) and time interleaver information shared by the core layer signal and the enhanced layer signal.

## Claims

### Claim 1

A method of generating broadcast signal frame, comprising:
generating a multiplexed signal by combining a core layer signal and an enhanced layer signal at different power levels;
reducing power of the multiplexed signal to a power level corresponding to the core layer signal;
generating a time-interleaved signal by performing time interleaving that is applied to both the core layer signal and the enhanced layer signal after combining the core layer signal and the enhanced layer signal; and
generating a broadcast signal frame including a preamble for signaling, start position information of Physical Layer Pipes (PLPs),
wherein the time interleaving is shared for both the core layer signal and the enhanced layer signal.

### Claim 2 (depends on 1)

The method of claim 1, wherein the generating the broadcast signal frame includes
generating a bootstrap;
generating the preamble; and
generating a super-imposed payload corresponding to the time-interleaved signal.

### Claim 3 (depends on 2)

The method of claim 2, wherein the start position information is identical to an index corresponding to a first data cell of a Physical Layer Pipe.

### Claim 4 (depends on 3)

The method of claim 3, wherein the start position information indicates a start position of the Physical Layer Pipe using a cell addressing scheme.

### Claim 5 (depends on 4)

The method of claim 4, wherein the preamble includes
a PLP identification information for identifying the Physical Layer Pipes (PLPs); and
a layer identification information for identifying layers corresponding to division of layers.

### Claim 6 (depends on 5)

The method of claim 5, wherein the start position information is included in the preamble for each of the Physical Layer Pipes (PLPs) without checking a condition of a conditional statement corresponding to the layer identification information.