Abstract: Routing system is disclosed. The system comprises one or more head devices participating in routing operations and one or more destination devices. Each head device has one or more member devices. At least one head device is configured to in response to receiving from a member device an uplink data packet DPU, forward the DPU and store into a routing table linkage information representing a linkage of a destination device generated the DPU to the member device. In response to receiving a downlink data packet DPD addressed to a destination device, forward the DPD only to its member device to which the destination device, to which the DPD is addressed, is linked based on the routing table, if linkage information related to the destination device, to which the DPD is addressed, is stored in the routing table. Also routing methods, head device, computer program, and computer readable medium are disclosed.

Abstract: According to an example implementation, a method for frequency offset reporting includes transmitting, by a first transceiver, a first tracking reference signal to a user device in a wireless communication system, transmitting, by a second transceiver, a second tracking reference signal to the user device, receiving, by the base station, a channel state information (CSI) reporting signal via an uplink channel, where the CSI reporting signal includes power estimation information. The method includes determining whether to pre-compensate a frequency of a downlink signal with frequency offset information based on the power estimation information, and transmitting, by at least one of the first transceiver or the second transceiver, the downlink signal with the pre-compensated frequency in response to the determination to pre-compensate the frequency of the downlink signal.