Apparatus, Computer Programs and Methods for Enabling Filtering of Neighbor Cells or Frequencies

摘要

A serving cell sends to user equipments (UEs) indications of frequency bands supported by neighbor cells/frequencies, at least one individual neighbor cell/frequency supporting a plurality of frequency bands. The neighbor cells/frequencies are filtered by the UE to retain only those that are indicated to support a frequency band or frequency bands which are also supported by the UE. The sent indications comprise, for each respective neighbor cell/frequency, one absolute radio frequency channel number (ARFCN) associated with the respective neighbor cell/frequency and the frequency band or bands associated with the respective neighbor cell/frequency. Examples are given of various system information blocks for sending the frequency band indications to the UE. In one embodiment they are arranged in an information element IE having an entry for each of the neighbor cells/frequencies and a list of frequency bands for each entry.

主权项

1. An apparatus comprising:
a processing system comprising at least one processor and a computer-readable memory storing a program, in which the processing system is constructed and arranged to cause the apparatus at least to: receive at a user equipment from a serving cell indications of frequency bands supported by respective neighbor cells, said indications comprising for at least one individual neighbor cell one absolute radio frequency channel number (ARFCN) associated with the at least one individual neighbor cell and a plurality of frequency bands associated with the at least one individual neighbor cell; from the received indications, derive at the user equipment from the indicated one ARFCN and the plurality of frequency bands at least one other ARFCN; and determine which frequency bands, of at least the one ARFCN and the at least one other ARFCN, are supported by the user equipment and retain the determined frequency bands in a local memory of the user equipment for mobility operations.