# US 2014/0192758 A1 · Communication system, base station apparatus, mobile terminal apparatus and communication method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192758 A1 - Document ID: US20140192758A1 - Status: Published application - Kind: A1 - Application number: 14/238,036 - Filed: 2012-06-19 - Published: 2014-07-10 - Earliest claimed: 2011-08-15 - Assignees: Ntt Docomo, Inc. - Inventors: Kazuaki Takeda; Tetsushi Abe; Yuta Sagae; Nobuhiko Miki - Web page: https://patentgrep.com/patent/US20140192758A1 ## CPC - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/1469: {using time-sharing} - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present invention is designed to use frequency resources effectively, even in the situation where a plurality of mobile terminal apparatuses of varying capabilities coexist. A communication system, in which a mobile terminal apparatus (10) and a base station apparatus (20) communicate using a basic carrier and an extended carrier that is additionally allocated to the basic carrier, in which: the base station apparatus has a setting section (310) that sets, in the extended carrier, a subframe of a first carrier type which can be received in each of a plurality of mobile terminal apparatuses of varying capabilities and a subframe of a second carrier type which can be received in part of the plurality of mobile terminal apparatuses, and a transmission section (203) that transmits the basic carrier and the extended carrier to the mobile terminal apparatus, and the mobile terminal apparatus has a receiving section (103) that receives the basic carrier and the extended carrier from the base station apparatus. ## Claims ### Claim 1 A communication system in which a mobile terminal apparatus and a base station apparatus communicate using a basic carrier and an extended carrier that is additionally allocated to the basic carrier, wherein: the base station apparatus comprises: a setting section that sets, in the extended carrier, a subframe of a first carrier type which can be received in each of a plurality of mobile terminal apparatuses of varying capabilities and a subframe of a second carrier type which can be received in part of the plurality of mobile terminal apparatuses; and a transmission section that transmits the basic carrier and the extended carrier to the mobile terminal apparatus; and the mobile terminal apparatus comprises: a receiving section that receives the basic carrier and the extended carrier from the base station apparatus. ### Claim 2 (depends on 1) The communication system according to claim 1, wherein the setting section sets, in the basic carrier, the subframe of the first carrier type and the subframe of the second carrier type. ### Claim 3 (depends on 1) The communication system according to claim 1, wherein the setting section disallows allocating the subframe of the second carrier type, to a mobile terminal apparatus which can receive only the subframe of the first carrier type. ### Claim 4 (depends on 1) The communication system according to claim 1, wherein the base station apparatus further comprises a reporting section that reports a carrier type of each subframe. ### Claim 5 (depends on 4) The communication system according to claim 4, wherein the reporting section reports the carrier type of each subframe using bitmap information which indicates a subframe in which the mobile terminal apparatus is allowed to measure a reference signal. ### Claim 6 A base station apparatus that communicates with a mobile terminal apparatus using a basic carrier and an extended carrier that is additionally allocated to the basic carrier, the base station apparatus comprising: a setting section that sets, in the extended carrier, a subframe of a first carrier type which can be received in each of a plurality of mobile terminal apparatuses of varying capabilities and a subframe of a second carrier type which can be received in part of the plurality of mobile terminal apparatuses; and a transmission section that transmits the basic carrier and the extended carrier to the mobile terminal apparatus. ### Claim 7 A mobile terminal apparatus that communicates with a base station apparatus using a basic carrier and an extended carrier that is additionally allocated to the basic carrier, the mobile terminal apparatus comprising: a receiving section that receives, from the base station apparatus, the extended carrier, in which a subframe of a first carrier type which can be received in each of a plurality of mobile terminal apparatuses of varying capabilities and a subframe of a second carrier type which can be received in part of the plurality of mobile terminal apparatuses, are set. ### Claim 8 A communication method whereby a mobile terminal apparatus and a base station apparatus communicate using a basic carrier and an extended carrier that is additionally allocated to the basic carrier, the communication method comprising the steps of: in the base station apparatus: setting, in the extended carrier, a subframe of a first carrier type which can be received in each of a plurality of mobile terminal apparatuses of varying capabilities and a subframe of a second carrier type which can be received in part of the plurality of mobile terminal apparatuses; and transmitting the basic carrier and the extended carrier to the mobile terminal apparatus; and in the mobile terminal apparatus: receiving the basic carrier and the extended carrier from the base station apparatus. ### Claim 9 (depends on 2) The communication system according to claim 2, wherein the setting section disallows allocating the subframe of the second carrier type, to a mobile terminal apparatus which can receive only the subframe of the first carrier type.