# US 11,121,793 B2 · Base station device, and mobile station device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,793 B2 - Document ID: US11121793B2 - Status: Granted - Kind: B2 - Application number: 16/584,135 - Filed: 2019-09-26 - Published: 2020-01-16 - Granted: 2021-09-14 - Earliest claimed: 2005-07-07 - Assignees: Panasonic Intellectual Property Corporation of America - Applicants: Panasonic Intellectual Property Corporation of America - Inventors: Katsuyoshi Naka; Hiroki Haga; Hidenori Matsuo - Web page: https://patentgrep.com/patent/US11121793B2 ## CPC - H04J 11/0069: {Cell search, i.e. determining cell identity [cell-ID] (design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655)} - H04B 1/7083: Cell search, e.g. using a three-step approach - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 27/2613: {Structure of the reference signals} - H04L 27/2656: {Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation} - H04L 27/2675: {Pilot or known symbols} - H04W 72/02: Selection of wireless resources by user or terminal - H04B 1/70735: {Code identification (H04B1/7083 takes precedence)} - H04B 2201/70701: featuring pilot assisted reception - H04L 5/0016: {Time-frequency-code} - H04W 88/08: Access point devices - 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) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided are a base station device and a mobile station device, which can lighten a cell-search processing. The base station device includes a frame constitution unit for forming a frame, in which a pilot symbol multiplied by a base station scrambling code and a plurality of sequences contained in the corresponding sequence set is arranged in at least the head or tail, and a radio transmission unit for sending the formed frame. On the receiving side, the frame timing can be detected from the position of a pilot symbol contained in that frame. Since the base station scrambling code and the sequence set containing the sequences are made to correspond to each other, candidates can be narrowed to at most the base station scrambling codes of the number of the combinations of the sequences contained in the sequence set, by detecting the sequences multiplied by the pilot symbol. ## Claims ### Claim 1 A base station comprising: generation circuitry, which, in operation, generates a first signal with first information, a second signal with second information, and a third signal with third information, maps the first signal and the second signal in different subcarriers, respectively, of a same first symbol, and maps the third signal in a second symbol other than the first symbol, the first information and the second information used to define a subset of a plurality of scrambling codes, and the third information used to select a scrambling code from the subset of a plurality of scrambling codes; and a transmitter, which, in operation, transmits the first symbol and the second symbol. ### Claim 2 (depends on 1) The base station according to claim 1, wherein the generation circuitry, in operation, maps the first signal in first subcarriers included in a first subcarrier group, and maps the second signal in second subcarriers included in a second subcarrier group. ### Claim 3 (depends on 2) The base station according to claim 2, wherein the first subcarriers included in the first subcarrier group are allocated in a skipping fashion and the second subcarriers included in the second subcarrier group are allocated in a skipping fashion. ### Claim 4 (depends on 1) The base station according to claim 1, wherein the generation circuitry, in operation, maps the first signal in first subcarriers that are inconsecutive in a frequency domain, and maps the second signal in second subcarriers that are different from the first subcarriers and that are inconsecutive in the frequency domain. ### Claim 5 A transmitting method comprising: generating a first signal with first information, a second signal with second information, and a third signal with third information; mapping the first signal and the second signal in different subcarriers, respectively, of a same first symbol, and mapping the third signal in a second symbol other than the first symbol, the first information and the second information used to define a subset of a plurality of scrambling codes, and the third information used to select a scrambling code from the subset of a plurality of scrambling codes; and transmitting the first symbol and the second symbol. ### Claim 6 (depends on 5) The transmitting method according to claim 5, wherein the first signal is mapped in first subcarriers included in a first subcarrier group, and the second signal is mapped in second subcarriers included in a second subcarrier group. ### Claim 7 (depends on 6) The transmitting method according to claim 6, wherein the first subcarriers included in the first subcarrier group are allocated in a skipping fashion and the second subcarriers included in the second subcarrier group are allocated in a skipping fashion. ### Claim 8 (depends on 5) The transmitting method according to claim 5, wherein the first signal is mapped in first subcarriers that are inconsecutive in a frequency domain, and the second signal is mapped in second subcarriers that are different from the first subcarriers and that are inconsecutive in the frequency domain.