Identifying multi-component carrier cells
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsBengt Lindoff, Erik Dahlman, Ylva Jading, Stefan Parkvall
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Abstract
Methods and apparatus for generating and determining multi-component carrier cells, without the use of neighbor-cell lists, are described. Methods for generating and informing a communication system terminal about other component carriers belonging to a certain cell identity (ID), and methods and apparatus for a mobile terminal utilizing extended synchronization information for doing multi-component carrier cell search are described. Also, methods for multi-component carrier measurements and methods of reporting such measurements to a network are described.
Claims31
A method of searching for a cell having a multi-component carrier in a radio communication system, the method comprising:
- receiving a signal transmitted by the cell on a carrier frequency having a first predetermined frequency of the multi-component carrier of the cell, wherein the multi-component carrier of the cell comprises at least two component carriers with respective different carrier frequencies that combined provide a single physical communication link of the cell;
- determining a first cell identity (ID) based on the received signal according to a cell search procedure carried out on received signals at the first predetermined frequency;
- reading extended synchronization information about multi-component carriers that is broadcast by the cell on the first predetermined frequency, wherein the extended synchronization information includes a second cell ID associated with a second predetermined carrier frequency of the multi-component carrier of the cell;
- and
- based on the extended synchronization information, carrying out a cell search procedure on received signals at the second predetermined carrier frequency of the multi-component carrier of the cell in order to determine the cell having the second cell ID.
An apparatus in a receiver for searching for a cell having a multi-component carrier in a radio communication system, the apparatus comprising:
- a device for receiving a signal transmitted by the cell on a carrier frequency having a first predetermined frequency of the multi-component carrier of the cell, wherein the multi-component carrier of the cell comprises at least two component carriers with respective different carrier frequencies that combined provide a single physical communication link of the cell;
- and
- an electronic processing device configured to determine a first cell identity (ID) based on the received signal according to a cell search procedure carried out on received signals at the first predetermined frequency;
- wherein the electronic processing device is further configured to read extended synchronization information about multi-component carriers that is broadcast by the cell on the first predetermined frequency of the multi-component carrier of the cell;
- the extended synchronization information includes a second cell ID associated with a second predetermined carrier frequency of the multi-component carrier of the cell;
- and based on the extended synchronization information, the electronic processing device is further configured to carry out a cell search procedure on received signals at the second predetermined carrier frequency of the multi-component carrier of the cell in order to determine the cell having the second cell ID.
A method of enabling searching for a cell having a multi-component carrier in a radio communication system, the method comprising:
- generating a signal to be transmitted by the cell on a carrier frequency having a first predetermined frequency of the multi-component carrier of the cell, wherein the multi-component carrier of the cell comprises at least two component carriers with respective different carrier frequencies that combined provide a single physical communication link of the cell;
- the signal includes a first cell identity (ID) for determination by a cell search procedure and extended synchronization information about multi-component carriers;
- and the extended synchronization information includes a second cell ID associated with a second predetermined carrier frequency of the multi-component carrier of the cell for determination of the second cell ID by a cell search procedure.
An apparatus for a transmitter of a cell having a multi-component carrier in a radio communication system, the apparatus comprising:
- at least first and second synchronization signal generators respectively corresponding to at least first and second component carriers of the multi-component carrier of the cell, the first and second component carriers having respective first and second predetermined carrier frequencies that combined provide a single physical communication link of the cell;
- and
- a control unit configured to provide and receive control and other signals to and from the at least first and second sync signal generators;
- wherein the first and second generators include respective first and second cell identification (ID) information in extended information included in first and second synchronization signals produced by the at least first and second generators;
- and the first and second cell ID information correspond to respective component carriers of the multi-component carrier of the cell and enable determinations of first and second cell IDs by respective cell search procedures.
Dependencies are inferred from the claim text.