Method and apparatus for measuring interference in a telecommunications system
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsDavid Astely, David Hammarwall, George Jöngren, Magnus Lundevall
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Abstract
A receiving unit or a transmitting unit of a wireless network, for facilitating noise and interference measurements on an air interface and a method of using the receiving/transmitting unit for measuring noise and interference. The receiving unit includes: a network interface which obtains information relating to a time-varying layout of a silent resource element (RE) grid; an electronic memory having code in communication with the network interface which stores the information; and a processing unit in communication with the electronic memory that takes a presence of a silent RE grid into account in the reception of a control or a data channel.
Claims18
A method in a receiving unit of a wireless network, for facilitating noise and interference measurements on an air interface, said method comprising the steps of:
- obtaining, at a receiver, information relating to a layout of a silent resource element (RE) grid for a first cell, wherein the silent RE grid indicates a plurality of resource elements for which no transmission is allocated on a data channel of the first cell,
- measuring a signal that is received on the data channel within a resource element for which no data transmission is allocated for the first cell according to the silent RE grid;
- determining an amount of inter-cell interference experienced on the data channel based on the signal measurement;
- and
- reporting, to a transmitter, a channel quality indication for the data channel based on the determined amount of inter-cell interference;
- wherein the silent RE grid comprises a first silent RE grid and the method further comprises:
- obtaining, at the receiver, information relating to a layout of a second silent RE grid for a control channel of the first cell, wherein the second silent RE grid indicates a plurality of resource elements for which no transmission is allocated on the control channel in the first cell;
- measuring a second signal that is received on the control channel within a resource element for which no data transmission is allocated for the first cell according to the second silent RE grid;
- determining an amount of inter-cell interference experienced on the control channel based on the second signal measurement;
- and
- reporting, to the transmitter, a second channel quality indication for the control channel based on the determined amount of inter-cell interference on the control channel.
A receiving apparatus for use in a wireless network, the apparatus comprising:
- a network interface configured to obtain information relating to a layout of a silent resource element (RE) grid for a first cell, wherein the silent RE grid indicates a plurality of resource elements for which no transmission is allocated on a data channel of the first cell;
- and
- a processing unit configured to:
- measure a signal that is received on the data channel within a resource element for which no data transmission is allocated for the first cell according to the silent RE grid;
- determine an amount of inter-cell interference experienced on the data channel based on the signal measurement;
- and
- report, to a transmitter, a channel quality indication for the data channel based on the determined amount of inter-cell interference;
- wherein:
- the silent RE grid comprises a first silent RE grid;
- the network interface is further configured to obtain information relating to a layout of a second silent RE grid for a control channel of the first cell, wherein the second silent RE grid indicates a plurality of resource elements for which no transmission is allocated on the control channel in the first cell;
- and
- the processing unit is further configured to:
- measure a second signal that is received on the control channel within a resource element for which no data transmission is allocated for the first cell according to the second silent RE grid;
- determine an amount of inter-cell interference experienced on the control channel based on the second signal measurement;
- and
- report, to the transmitter, a second channel quality indication for the control channel based on the determined amount of inter-cell interference on the control channel.
Dependencies are inferred from the claim text.