China Tower has filed a patent for a data transmission method that involves a terminal in an RRC inactive state sending data and an RRC resume request to a first base station or its CU or DU, and receiving an RRC release message from the same. GlobalData’s report on China Tower gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on China Tower, V2V communication antennas was a key innovation area identified from patents. China Tower's grant share as of September 2023 was 44%. Grant share is based on the ratio of number of grants to total number of patents.
Data transmission method for a ue in rrc inactive state
A recently filed patent (Publication Number: US20230319941A1) describes a data transmission method for User Equipment (UE) in a Radio Resource Control (RRC) inactive state. The method involves sending data and an RRC resume request message to a first base station or a Centralized Unit (CU) or Distributed Unit (DU) of the first base station. The UE then receives an RRC release message from the first base station or the CU or DU.
The patent also mentions that the RRC resume request message can be either in a four-step random access procedure or carried by a message A (MSG A) in a two-step random access procedure. Before sending the data and RRC resume request message, the method includes encapsulating the data directly as a first Media Access Control (MAC) Service Data Unit (SDU) to a first MAC Protocol Data Unit (PDU), or encapsulating a second MAC SDU generated through preprocessing using the data to a second MAC PDU. The sub-header of the first MAC SDU contains Logical Channel Identification (LCID) information or bearer identification information, indicating the logical channel type and data bearer corresponding to the data.
The patent also describes a data transmission method applied to a first base station or a CU or DU of the first base station. In this method, the first base station or CU or DU receives data and an RRC resume request message from a UE in an RRC inactive state. It then sends an RRC release message to the UE. Similar to the previous method, the RRC resume request message can be in a four-step random access procedure or carried by a MSG A in a two-step random access procedure. The data is encapsulated to a first MAC PDU or a second MAC PDU, with the first MAC PDU containing a first MAC SDU directly generated through the data, and the second MAC PDU containing a second MAC SDU generated through preprocessing using the data.
After receiving the data and RRC resume request message from the UE in the RRC inactive state, the method further includes sending restored data to a core network. Alternatively, it can involve sending a retrieval UE context request message to a second base station, receiving a retrieval UE context response message from the second base station, and then sending the data to the core network. The data can be obtained from the first MAC PDU or the second MAC PDU based on a successfully retrieved UE context.
Overall, this patent presents data transmission methods for UEs in RRC inactive states, providing options for encapsulating data and facilitating communication between UEs and base stations or network devices.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
