# US 2018/0027488 A1 · Transmission Method and Apparatus of Discovery Information and Communications System > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0027488 A1 - Document ID: US20180027488A1 - Status: Published application - Kind: A1 - Application number: 15/723,447 - Filed: 2017-10-03 - Published: 2018-01-25 - Earliest claimed: 2015-04-10 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Lianhai WU; Haibo XU; Hua ZHOU - Web page: https://patentgrep.com/patent/US20180027488A1 ## CPC - H04W 48/16: Discovering, processing access restriction or access information - H04W 52/02: Power saving arrangements - H04W 72/00: Local resource management - H04W 72/04: Wireless resource allocation - H04W 8/005: {Discovery of network devices, e.g. terminals} - H04W 72/40: Resource management for direct mode communication, e.g. D2D or sidelink - H04W 92/18: between terminal devices - 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) - 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 A transmission method and apparatus of discovery information and a communications system. The transmission method of discovery information includes: transmitting indication information indicating a size of discovery information by a user equipment to a base station; receiving one or more resources which is/are allocated by the base station according to the indication information; and transmitting the discovery information by using the one or more resources to perform sidelink discovery. Hence, a case of waste of resources or being unable to carry discovery information may be reduced as possible even if sizes of discovery information are different due to different scenarios. ## Claims ### Claim 1 A transmission apparatus of discovery information, configured in a user equipment, the apparatus comprising: an indication transmitting unit configured to transmit indication information indicating a size of discovery information to a base station; a resource receiving unit configured to receive one or more resources which is/are allocated by the base station according to the indication information; and an information transmitting unit configured to transmit the discovery information by using the one or more resources to perform sidelink discovery. ### Claim 2 (depends on 1) The transmission apparatus of discovery information according to claim 1, wherein the indication information comprises a type and a corresponding number of pieces of the discovery information. ### Claim 3 (depends on 2) The transmission apparatus of discovery information according to claim 2, wherein the type and the corresponding number of pieces of the discovery information are contained in a SidelinkUEInformation message. ### Claim 4 (depends on 1) The transmission apparatus of discovery information according to claim 1, wherein the indication information is contained in a buffer status report. ### Claim 5 (depends on 4) The transmission apparatus of discovery information according to claim 4, wherein the indication transmitting unit is further configured to: transmit the buffer status report to the base station when a medium access control layer receives high-layer indication that discovery information needs to be transmitted in a case where the discovery information has no corresponding logic channel; and transmit the buffer status report to the base station when discovery information reaches the logic channel in a case where the discovery information has a corresponding logic channel. ### Claim 6 (depends on 1) The transmission apparatus of discovery information according to claim 1, wherein the apparatus further comprises: a determining unit configured to determine whether the discovery information can be accommodated by two physical resource block pairs; and a segmenting unit configured to segment the discovery information at a radio link control layer when the discovery information cannot be accommodated by two physical resource block pairs, so that each transport block can be accommodated in the two physical resource block pairs. ### Claim 7 A transmission apparatus of discovery information, configured in a base station, the apparatus comprising: an indication receiving unit configured to receive indication information indicating a size of discovery information transmitted by a user equipment; a resource allocating unit configured to allocate one or more resources for sidelink discovery for the user equipment according to the indication information; and a resource transmitting unit configured to transmit the one or more resources to the user equipment. ### Claim 8 (depends on 7) The transmission apparatus of discovery information according to claim 7, wherein the indication information comprises a type and a corresponding number of pieces of the discovery information. ### Claim 9 (depends on 8) The transmission apparatus of discovery information according to claim 8, wherein the type and the corresponding number of pieces of the discovery information are contained in a SidelinkUEInformation message. ### Claim 10 (depends on 7) The transmission apparatus of discovery information according to claim 7, wherein the indication information is contained in a buffer status report. ### Claim 11 A communications system, comprising: a user equipment configured to transmit indication information indicating a size of discovery information to a base station, receive one or more resources which is/are allocated by the base station according to the indication information, and transmit the discovery information by using the one or more resources to perform sidelink discovery; and a base station configured to receive indication information transmitted by the user equipment, allocate one or more resources for the sidelink discovery for the user equipment according to the indication information, and transmit the one or more resources to the user equipment. ### Claim 12 (depends on 11) The communications system according to claim 11, wherein the indication information comprises a type and a corresponding number of pieces of the discovery information. ### Claim 13 (depends on 11) The communications system according to claim 11, wherein the indication information is contained in a buffer status report.