Telefonaktiebolaget Lm Ericsson (publ)

Ohan Khodaverdian

Stefano Ruffini

Magnus Sandgren

Garry Irvine

Mårten Wahlström

Mikael Johansson

Alexandra Mikaelsson

A group of radio network nodes () performs automatic synchronization source selection using Radio-interface Based Synchronization, based on the exchange of clock-attribute information between respective nodes () via inter-node connections. Access to the clock-attribute information for other nodes () in the same domain or subdomain allows a given node () to select the best or most preferred synchronization source for use in synchronizing its own clock (), based on a combined or joint evaluation of parameters or metrics that include the reception quality of OTA signals from respective ones of the candidate nodes () and the corresponding clock-attribute information. Further parameters or metrics may be evaluated in the selection, such as neighbor-relation considerations. The combined use of OTA synchronization signaling and clock-attribute information exchanges, e.g., according to IEEE 1588 PTP, enables the group of nodes () to carry out Best Master Clock Selection (BMCS) or Alternate BMCS algorithms on an automatic basis.

Method and apparatus for synchronizing radio network nodes

A method performed by a system of a wireless communication network is disclosed. The method relates to provisioning of a time-sensitive service related to a wireless device. The wireless communication network comprises a plurality of antenna reference points, ARPs, of one or more radio access network nodes of the wireless communication network. The method comprises obtaining information that a first ARP and a second ARP of the plurality of ARPs are to provide the time-sensitive service to the wireless device, determining, by inter-ARP radio signalling between ARPs of one or more pairs of the plurality of ARPs, one of the one or more pairs including the first ARP and one of the one or more pairs including the second ARP, a relative timing error between the first ARP and the second ARP, and taking the determined relative timing error into consideration when providing the service to the wireless device.

Methods and systems for providing time-sensitive services related to wireless devices

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Tyresö, Sweden

Ohan Khodaverdian