An inter-base-station synchronization method and a device are provided. The method includes: sending, by a source base station, a request for time synchronization to a target base station, request for time synchronization; receiving, by the source base station, an acknowledgment message from the target base station; sending, by the source base station, a particular sequence to a target user terminal located in a particular area, so that the target user terminal sends the particular sequence; and detecting, by the source base station, the particular sequence, and performing time synchronization between the source base station and the target base station. According to the present disclosure, the user terminal located in the particular area forwards the particular sequence, so that to-be-synchronized base stations detect the particular sequence to implement inter-base-station time synchronization.

Input/output (I/O) operation requests from pageable storage mode guests are interpreted without host intervention. In a pageable mode virtual environment, requests issued by pageable storage mode guests are processed by one or more processors of the environment absent intervention from one or more hosts of the environment. Processing of the requests includes manipulating, by at least one processor on behalf of the guests, buffer state information stored in host storage. The manipulating is performed via instructions initiated by the guests and processed by one or more of the processors.

Embodiments include methods, in a base station operating in a wireless communications network, for over-the-air synchronization with a cell served by a further base station. Such methods include receiving time synchronization information and muting availability information associated with a plurality of further base stations serving a plurality of cells. Such methods also include determining that a cell served by a first further base station is a preferred synchronization source cell for the base station, and sending, to one or more second further base stations, respective requests to activate muting in one or more of the cells served by the second further base stations. Embodiments include complementary methods performed by a further base station, and base stations configured to perform operations corresponding to the exemplary methods.

Mitigation of inter-base station resynchronization loss in wireless networks including contention-based shared frequency spectrum is discussed. Aspects of such mitigation provide for base stations entering into an idle mode when a transmission opportunity occurs in a radio frame of the next resynchronization occasion. Additional aspects provide for the base station to signal a flexible listen before talk (LBT) frame length to the user equipment (UE), either with or without explicit signaling of the downlink-uplink division. Further aspects provide for the base station to signal a reset indication to UEs that will prompt the UEs to monitor for downlink channel reserving signals prior to the current LBT frame ending by the resynchronization occasion.

A method is provided. The method includes: receiving a handover request, from a source base station, for requesting to perform time synchronization with a target base station; and sending handover request acknowledgement information to the source base station, where the handover request acknowledgement information includes information used to indicate whether the source base station performs time synchronization with the target base station. The source base station may determine, according to the handover request acknowledgement information sent by the target base station, whether the source base station needs to perform time synchronization with the target base station.

Embodiments include methods, in a base station operating in a wireless communications network, for over-the-air synchronization with a cell served by a further base station. Embodiments include sending, to a core network (CN) node, a first eNB Configuration Transfer message comprising: an identity of a target base station, and a first SON Information Request IE comprising a value indicating a request for time synchronization information. Embodiments include receiving, from the CN node, a first MME Configuration Transfer message comprising a SON Information Reply IE that originated from the target base station and includes a muting availability flag. If the flag indicates that muting can be activated in the target base station, embodiments include sending, to the CN node, a second eNB Configuration Transfer message comprising the identity of the target base station and a second SON Information Request IE comprising a value for activating muting in the target base station.

Systems and methods for positioning in a cellular communications system are disclosed. A method performed by a first base station (BS) includes receiving a signal transmitted by a second BS and estimating a Time of Arrival (TOA) of the received signal at the first BS according to a clock of the first BS. The method further includes determining a delta value that is or is a function of a time between the TOA of the received signal at the first BS according to the clock and a time reference at the first BS and either (a) providing the delta value to a positioning estimation entity within the communications system or (b) using the delta value at the first BS to reduce a time synchronization error between the first BS and the second BS, or (c) passing the delta value to a User Equipment.

In an optical wireless communication, OWC, network (100), time division multiple access, TDMA, is commonly used for interference suppression among multiple network devices (D1-Dn) associated to a single coordinator, or among adjacent coordinators (C1-Cn). However, an offset of MAC cycles among two adjacent coordinators (C1-C2) may still result in interference to a network device (D1) located in the overlapping area of the coverage areas of these two adjacent coordinators (C1-Cn). This invention is directed to various methods, apparatus, systems, computer program and computer-readable media for providing a mechanism to make use of an out-of-band channel to send a signal from a network device (D1) to the two adjacent coordinators (C1-C2), for assisting the alignment of MAC cycles among the two adjacent coordinators (C1-C2), and the out-of-band channel has a line-of-sight character, and is out-of-band as compared to the OWC network (100).

Mitigation of inter-base station resynchronization loss in wireless networks including contention-based shared frequency spectrum is discussed. Aspects of such mitigation provide for base stations entering into an idle mode when a transmission opportunity occurs in a radio frame of the next resynchronization occasion. Additional aspects provide for the base station to signal a flexible listen before talk (LBT) frame length to the user equipment (UE), either with or without explicit signaling of the downlink-uplink division. Further aspects provide for the base station to signal a reset indication to UEs that will prompt the UEs to monitor for downlink channel reserving signals prior to the current LBT frame ending by the resynchronization occasion.

The present invention relates to a communication assembly comprising a first terminal provided with a first communication module arranged to communicate with a plurality of beacons, each comprising a communication circuit to enable data to be sent and/or received with a particular periodicity Said assembly additionally comprises a second terminal having a second communication module, wherein said second terminal is arranged to scan its environment by means of said second communication module in order to detect the presence of beacons within range and to retrieve for each beacon detected the particular periodicity and a time offset corresponding to the period between a reference point and the start of the transmission of the message and send them to the first terminal.