US Pat. No. 10,341,037

METHOD AND APPARATUS FOR TRANSMITTING OR DETECTING A PRIMARY SYNCHRONIZATION SIGNAL

Wild Guard Ltd., Central...

1. A receiver detecting a sequence used in a received (Rx) signal in a mobile communication system using orthogonal frequency division multiplexing (OFDM), the receiver comprising:a radio frequency (RF) module including a receiver receiving the Rx signal from a transmitter; and
a processor connected to the radio frequency module and detecting the sequence used in the Rx signal,
wherein the sequence used in the Rx signal is generated by using a Zadoff-Chu sequence having one of indexes contained in a predetermined index set,
wherein the predetermined index set comprises a first index and a second index, and
wherein a sum of the first index and the second index corresponds to a length of the Zadoff-Chu sequence.

US Pat. No. 10,462,787

METHOD OF ALLOCATING RADIO RESOURCES IN MULTI-CARRIER SYSTEM

WILD GUARD LTD., Central...

6. A method of obtaining buffer status information of a user equipment at a base station in an orthogonal frequency division multiplexing (OFDM)-based mobile communication system, wherein the user equipment is in a state that data transmission from the user equipment is performed based on scheduling from the base station, the method comprising:receiving, by the base station, a signal of one bit-level information from the user equipment periodically via a physical uplink channel that is not a random access channel, while there is no traffic channel resource from the user equipment to the base station, wherein the signal is for informing presence of a request for an uplink channel resource used to communicate the buffer status information to the base station;
transmitting, by the base station, first resource allocation information for a first uplink channel to the user equipment after receiving the signal; and
receiving, by the base station, the buffer status information from the user equipment through the first uplink channel using the first resource allocation information.

US Pat. No. 10,440,609

HANDOVER METHOD WITH LINK FAILURE RECOVERY, WIRELESS DEVICE AND BASE STATION FOR IMPLEMENTING SUCH METHOD

Wild Guard Ltd., Central...

1. A method of communicating with a network in a wireless communication system, the method comprising:detecting, by a user equipment (UE) comprising a processor, a radio link failure of a first communication link between the UE and a source cell;
performing, by the UE, a cell selection procedure upon detection of the radio link failure to identify a target cell to establish a second communication link between the UE and the target cell; and
generating by the UE an authentication vector using a cryptographic algorithm that employs inputs parameters comprising:
a secret key shared between the UE and the source cell, wherein the secret key is derived from a high level secret key and is used for protection of RRC traffic, and the secret key is a KRRCint key and the high level secret key is a KeNB key which is available to both the UE and an enhanced Node B (eNodeB), and
an identifier assigned to the target cell; and
transmitting, by the UE, a message to request a connection reestablishment with the target cell to establish the second communication link between the UE and the target cell, wherein the message includes an identifier of the UE and the authentication vector, wherein the authentication vector is to be used for verifying the UE for the connection re-establishment with the target cell.