# US 8,787,920 B2 · Method for transmitting and receiving system information via a broadcast channel (BCH) and a downlink shared channel (DL—SCH) > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,787,920 B2 - Document ID: US8787920B2 - Status: Granted - Kind: B2 - Application number: 12/577,138 - Filed: 2009-10-09 - Published: 2010-04-15 - Granted: 2014-07-22 - Earliest claimed: 2007-01-31 - Assignees: LG Electronics Inc. - Applicants: Young-Dae Lee; Sung-Duck Chun; Sung-Jun Park; Seung-June Yi - Inventors: Young-Dae Lee; Sung-Duck Chun; Sung-Jun Park; Seung-June Yi - Web page: https://patentgrep.com/patent/US8787920B2 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 5/0005: {Time-frequency} - H04L 5/003: {Arrangements for allocating sub-channels of the transmission path} - H04W 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} - H04W 48/12: using downlink control channel - H04W 48/16: Discovering, processing access restriction or access information - H04W 72/30: Resource management for broadcast services - H04W 84/042: {Public Land Mobile systems, e.g. cellular systems} - H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services - H04W 92/10: between terminal device and access point, i.e. wireless air interface - 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 A method for exchanging, between a mobile terminal and a base station, system information via a broadcast control channel (BCCH), which is a logical channel between a radio link control (RLC) layer and a medium access control (MAC) layer, and a broadcast channel (BCH) and a downlink shared channel (DL_SCH), which are transport channels between the MAC layer and a physical layer. The method includes: receiving a block of first system information from the base station in a predetermined frame of the BCH; and after the block of first system information is received, receiving a first block of second system information from the base station in a predetermined frame of the DL_SCH configured to carry system information and other data, the first block of second system information including schedule information relating to a second block of second system information. ## Claims ### Claim 1 A method for receiving, by a mobile terminal from a base station, system information via a broadcast control channel (BCCH), which is a logical channel between a radio link control (RLC) layer and a medium access control (MAC) layer, and a broadcast channel (BCH) and a downlink shared channel (DL_SCH), the BCH and DL_SCH being transport channels between the MAC layer and a physical layer and which are each directly mapped to the BCCH, the method comprising: receiving a block of first system information from the base station in a predetermined frame of the BCH; and after the block of first system information is received, receiving a first block of second system information from the base station in a predetermined frame of the DL_SCH configured to carry system information and user traffic, the first block of second system information including schedule information relating to a second block of second system information, wherein the first block of second system information and the second block of second system information are received via the DL_SCH in accordance with a specific control channel, wherein the specific control channel indicates frequency and time information via which the first block of second system information and the second block of second system information are received via the DL_SCH, and wherein the first block of second system information further includes cell access related information. ### Claim 2 (depends on 1) The method of claim 1, further comprising: after the first block of second system information is received, receiving the second block of second system information from the base station via the DL_SCH in accordance with the schedule information included in the first block of second system information. ### Claim 3 (depends on 1) The method of claim 1, wherein the schedule information includes at least one of periodicity information and mapping information. ### Claim 4 (depends on 3) The method of claim 3, wherein the at least one of periodicity information and mapping information is for receiving the second block of second system information. ### Claim 5 (depends on 1) The method of claim 1, wherein the block of first system information includes at least one of bandwidth information and parameter information on a physical layer. ### Claim 6 (depends on 1) The method of claim 1, wherein the second block of second system information further comprises one of: common or shared channel related information; call transmission information; a cell select related information; a positioning related information; and a Multimedia Broadcast Multicast Service (MBMS) related information. ### Claim 7 (depends on 1) The method of claim 1, wherein the DL_SCH supports HARQ (hybrid automatic repeat request) scheme. ### Claim 8 (depends on 1) The method of claim 1, wherein the first block of second system information further includes value tag information. ### Claim 9 (depends on 1) The method of claim 1, wherein the step of receiving a first block of second system information comprises: periodically receiving the first block of second system information in accordance with a corresponding first predetermined period. ### Claim 10 (depends on 9) The method of claim 9, wherein the step of receiving a block of first system information comprises: periodically receiving the block of first system information in accordance with a corresponding second predetermined period. ### Claim 11 (depends on 1) The method of claim 1, wherein the step of receiving a first block of second system information comprises: receiving the first block of second system information at a predetermined time after receiving the block of first system information. ### Claim 12 (depends on 1) The method of claim 1, wherein the each second block of second system information has a corresponding second block period. ### Claim 13 (depends on 1) The method of claim 1, wherein the specific control channel is a L1/L2 control channel. ### Claim 14 (depends on 1) The method of claim 1, wherein the step of receiving a second block of second system information comprises: receiving plural second blocks of second system information, each second block of second system information being mutually exclusive. ### Claim 15 (depends on 1) The method of claim 1, wherein the cell access related information includes PLMN (Public Land Mobile Network) identity information, tracking area identity information and cell barred information. ### Claim 16 A method for transmitting, by a base station to at least one mobile terminal, system information via a broadcast control channel (BCCH), which is a logical channel between a radio link control (RLC) layer and a medium access control (MAC) layer, and a broadcast channel (BCH) and a downlink shared channel (DL_SCH), the BCH and DL_SCH being transport channels between the MAC layer and a physical layer and which are each directly mapped to the BCCH, the method comprising: transmitting a block of first system information to the at least one mobile terminal in a predetermined frame of the BCH; and after the block of first system information is transmitted, transmitting a first block of second system information to the at least one mobile terminal in a predetermined frame of the DL_SCH configured to carry system information and user traffic, the first block of second system information including schedule information relating to a second block of second system information, wherein the first block of second system information and the second block of second system information are transmitted via the DL_SCH in accordance with a specific control channel, wherein the specific control channel indicates frequency and time information via which the first block of second system information and the second block of second system information are transmitted via the DL_SCH, and wherein the first block of second system information further includes cell access related information. ### Claim 17 (depends on 16) The method of claim 16, further comprising: after the first block of second system information is transmitted, transmitting the second block of second system information to the at least one mobile terminal via the DL_SCH in accordance with the schedule information included in the first block of second system information. ### Claim 18 (depends on 16) The method of claim 16, wherein the schedule information includes at least one of periodicity information and mapping information. ### Claim 19 (depends on 18) The method of claim 18, wherein the at least one of periodicity information and mapping information is for receiving the second block of second system information. ### Claim 20 (depends on 16) The method of claim 16, wherein the block of first system information includes at least one of bandwidth information and parameter information on a physical layer. ### Claim 21 (depends on 16) The method of claim 16, wherein the second block of second system information further comprises one of: common or shared channel related information; call transmission information; a cell select related information; a positioning related information; and a Multimedia Broadcast Multicast Service (MBMS) related information. ### Claim 22 (depends on 16) The method of claim 16, wherein the DL_SCH supports HARQ (hybrid automatic repeat request) scheme. ### Claim 23 (depends on 16) The method of claim 16, wherein the first block of second system information further includes value tag information. ### Claim 24 (depends on 16) The method of claim 16, wherein the step of transmitting a first block of second system information comprises: periodically transmitting the first block of second system information in accordance with a corresponding first predetermined period. ### Claim 25 (depends on 24) The method of claim 24, wherein the step of transmitting a block of first system information comprises: periodically transmitting the block of first system information in accordance with a corresponding second predetermined period. ### Claim 26 (depends on 16) The method of claim 16, wherein the step of transmitting a first block of second system information comprises: transmitting the first block of second system information at a predetermined time after transmitting the block of first system information. ### Claim 27 (depends on 16) The method of claim 16, wherein the each second block of second system information has a corresponding second block period. ### Claim 28 (depends on 16) The method of claim 16, wherein the specific control channel is a L1/L2 control channel. ### Claim 29 (depends on 16) The method of claim 16, wherein the step of transmitting a second block of second system information comprises: transmitting plural second blocks of second system information, each second block of second system information being mutually exclusive. ### Claim 30 (depends on 16) The method of claim 16, wherein the cell access related information includes PLMN (Public Land Mobile Network) identity information, tracking area identity information and cell barred information.