# US 2016/0262175 A1 · Base station, mobile station and method for downlink scheduling > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0262175 A1 - Document ID: US20160262175A1 - Status: Published application - Kind: A1 - Application number: 15/057,231 - Filed: 2016-03-01 - Published: 2016-09-08 - Earliest claimed: 2015-03-04 - Assignees: Ntt Docomo, Inc. - Applicants: NTT DoCoMo, Inc. - Inventors: Anxin Li; Huiling Jiang - Web page: https://patentgrep.com/patent/US20160262175A1 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/003: {Arrangements for allocating sub-channels of the transmission path} - H04W 72/12: Wireless traffic scheduling - 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 There are provided a base station, a mobile station and a method for downlink scheduling by the base station. The base station comprises a scheduling unit, configured to assign a downlink resource block and a number of streams, an antenna port, and a scrambling identity for the antenna port to a mobile station, wherein a combination of the number of streams, the antenna port and the scrambling identity determines a successive interference cancellation order of the mobile station in the downlink resource block; and a transmitting unit, configured to transmit downlink scheduling information to the mobile station, the downlink scheduling information including information indicating the downlink resource block and information indicating the number of streams, the antenna port and the scrambling identity. ## Claims ### Claim 1 A base station, comprising: a scheduling unit, configured to assign a downlink resource block and a number of streams, an antenna port and a scrambling identity for the antenna port to a mobile station, wherein a combination of the number of streams, the antenna port and the scrambling identity determines a successive interference cancellation order of the mobile station in the downlink resource block; and a transmitting unit, configured to transmit downlink scheduling information to the mobile station, the downlink scheduling information including information indicating the downlink resource block and information indicating the number of streams, the antenna port and the scrambling identity. ### Claim 2 (depends on 1) The base station according to claim 1, wherein the scheduling unit assigns the number of streams, the antenna port and the scrambling identity according to a rule both known by the base station and the mobile station. ### Claim 3 (depends on 2) The base station according to claim 2, wherein the rule includes a mapping of all combinations of antenna ports and scrambling identities when the number of streams is 1 to a corresponding successive interference cancellation order, and a mapping of all combinations of antenna ports and scrambling identities when the number of streams is 2 to a corresponding successive interference cancellation order. ### Claim 4 (depends on 2) The base station according to claim 2, wherein the transmitting unit is further configured to inform the mobile station of the rule through a radio resource control signaling. ### Claim 5 (depends on 1) The base station according to claim 1, wherein the downlink scheduling information further includes at least one of information related to a pre-coding matrix for the mobile station, information related to a modulating and coding scheme for the mobile station, and information related to a demodulation reference signal for the mobile station. ### Claim 6 (depends on 5) The base station according to claim 5, wherein the transmitting unit is further configured to transmit information related to a modulating and coding scheme of another mobile station and multiplexed into a resource block identical to that of the mobile station to the mobile station through a dedicated signaling. ### Claim 7 (depends on 5) The base station according to claim 5, wherein the transmitting unit is further configured to transmit a demodulation reference signal to the mobile station, such that the mobile station determines a transmitting power assigned to the mobile station based on a power of the demodulation reference signal. ### Claim 8 A method for downlink scheduling by a base station, comprising: assigning a downlink resource block and a number of streams, an antenna port and a scrambling identity for the antenna port to a mobile station, wherein a combination of the number of streams, the antenna port and the scrambling identity determines a successive interference cancellation order of the mobile station in the downlink resource block; and transmitting downlink scheduling information to the mobile station, the downlink scheduling information including information indicating the downlink resource block and information indicating the number of streams, the antenna port and the scrambling identity. ### Claim 9 (depends on 8) The method according to claim 8, wherein the number of streams, the antenna port and the scrambling identity are assigned according to a rule both known by the base station and the mobile station. ### Claim 10 (depends on 9) The method according to claim 9, wherein the rule includes a mapping of all combinations of antenna ports and scrambling identities when the number of streams is 1 to a corresponding successive interference cancellation order, and a mapping of all combinations of antenna ports and scrambling identities when the number of streams is 2 to a corresponding successive interference cancellation order. ### Claim 11 (depends on 9) The method according to claim 9, further comprising: informing the mobile station of the rule through a radio resource control signaling. ### Claim 12 (depends on 8) The method according to claim 8, wherein the downlink scheduling information further includes at least one of information related to a pre-coding matrix for the mobile station, information related to a modulating and coding scheme for the mobile station, and information related to a demodulation reference signal for the mobile station. ### Claim 13 (depends on 12) The method according to claim 12, further comprising: transmitting information related to a modulating and coding scheme of another mobile station and multiplexed into a resource block identical to that of the mobile station to the mobile station through a dedicated signaling. ### Claim 14 (depends on 12) The method according to claim 12, further comprising: transmitting a demodulation reference signal to the mobile station, such that the mobile station determines a transmitting power assigned to the mobile station based on a power of the demodulation reference signal. ### Claim 15 A mobile station, comprising: a receiving unit, configured to receive downlink scheduling information transmitted by a base station, the downlink scheduling information including information indicating a downlink resource block assigned to the mobile station and information indicating a number of streams, an antenna port and a scrambling identity for the antenna port, which are assigned to the mobile station; and a determining unit, configured to determine a successive interference cancellation order of the mobile station in the downlink resource block based on a combination of the number of streams, the antenna port and the scrambling identity. ### Claim 16 (depends on 15) The mobile station according to claim 15, wherein the determining unit is configured to determine a successive interference cancellation order of the mobile station in the downlink resource block based on a combination of the number of streams, the antenna port and the scrambling identity. ### Claim 17 (depends on 16) The mobile station according to claim 16, wherein the rule includes a mapping of all combinations of antenna ports and scrambling identities when the number of streams is 1 to a corresponding successive interference cancellation order, and a mapping of all combinations of antenna ports and scrambling identities when the number of streams is 2 to a corresponding successive interference cancellation order. ### Claim 18 (depends on 16) The mobile station according to claim 16, wherein the receiving unit is further configured to receive the rule informed by the base station through a radio resource control signaling. ### Claim 19 (depends on 15) The mobile station according to claim 15, wherein the downlink scheduling information further includes at least one of information related to a pre-coding matrix for the mobile station, information related to a modulating and coding scheme for the mobile station, and information related to a demodulation reference signal for the mobile station. ### Claim 20 (depends on 19) The mobile station according to claim 19, wherein the receiving unit is further configured to receive information, which is transmitted by the base station, related to a modulating and coding scheme of another mobile station and multiplexed into a resource block identical to that of the mobile station to the mobile station through a dedicated signaling.