User Equipment Restricted Measurements For Multimedia Broadcast Single Frequency Network Networks
An example apparatus includes a processor and an associated memory, in which the processor is configured to receive an indicator that indicates whether Multimedia Broadcast Single Frequency Network (MBSFN) subframes are configured for measurement restriction and perform measurements based on the indicator.
1 . An apparatus comprising:
a processor and an associated memory, the processor configured to:
receive an indicator that indicates whether Multimedia Broadcast Single Frequency Network (MBSFN) subframes are configured for measurement restriction;
perform measurements based on the indicator.
2 . The apparatus of claim 1 wherein the processor is configured to receive the indicator with a “MeasObjectEUTRA” IE.
3 . The apparatus of claim 1 wherein the processor is configured to receive the indicator for a first neighboring cell and a restricted measurement pattern for the first neighboring cell.
4 . The apparatus of claim 1 wherein the processor is further configured to:
perform the measurements for a cell based on a cell identifier, the indicator being associated with a cell identifier so as to indicate whether MBSFN subframes are configured for measurement restriction for the cell.
5 . The apparatus of claim 1 wherein the indicator comprises a list of values where each value corresponds to a neighboring cell and a respective indicator on the list indicates whether MBSFN subframes are configured for measurement restriction for a respective cell.
6 . The apparatus of claim 1 wherein the apparatus is a wireless device or a user equipment device.
7 . The apparatus of claim 1 wherein the measurements are radio resource control measurements for a first cell.
8 . The apparatus of claim 1 wherein the indicator is included in the signaling for restricted pattern from an eNb.
9 . The apparatus of claim 1 wherein the processor is configured to measure a subframe based on all Cell Reference Symbols (CRS) symbols when the indicator indicates that MBSFN subframes are not configured for measurement restriction.
10 . The apparatus of claim 1 wherein, when the indicator indicates that MBSFN subframes are configured for measurement restriction and the processor determines that no MBSFN subframes are present in any neighboring cells, the processor is configured to measure a subframe based on all Cell Reference Symbols (CRS) symbols.
11 . The apparatus of claim 1 wherein, when the indicator indicates that MBSFN subframes are configured for measurement restriction and the processor determines MBSFN subframe allocations of all neighbor cells are identical to or subsets of that in the serving cell and the processor determines a restricted measurements subframe does not collide with a configured MBSFN subframe, the processor is configured to measure the restricted measurements subframe based on all Cell Reference Symbols (CRS) symbols.
12 . The apparatus of claim 1 wherein, when the indicator indicates that MBSFN subframes are configured for measurement restriction and the processor determines MBSFN subframe allocations of all neighbor cells are identical to or subsets of that in the serving cell and the processor determines a restricted measurements subframe does collide with a configured MBSFN subframe, the processor is configured to measure the restricted measurements subframe based only on Cell Reference Symbols (CRS) of symbol #0.
13 . The apparatus of claim 1 wherein, when the indicator indicates that MBSFN subframes are configured for measurement restriction and the processor determines that not all neighbor cells have the same MBSFN subframe allocation as the serving cell and the processor determines the restricted measurements subframe corresponds to subframe #1,2,3,6,7 or 8, the processor is configured to measure the restricted measurements subframe based only on Cell Reference Symbols (CRS) of symbol #0 of the corresponding subframe #1,2,3,6,7 or 8.
14 . The apparatus of claim 1 wherein, when the indicator indicates that MBSFN subframes are configured for measurement restriction and the processor determines that not all neighbor cells have the same MBSFN subframe allocation as the serving cell and the processor determines the restricted measurements subframe corresponds to subframe #0, 4, 5 or 9, the processor is configured to measure the restricted measurements subframe based all Cell Reference Symbols (CRS) of the corresponding subframe #0, 4, 5 or 9.
15 . A method comprising:
receiving an indicator that indicates whether Multimedia Broadcast Single Frequency Network (MBSFN) subframes are configured for measurement restriction;
performing measurements based on the indicator.
16 . The method of claim 15 wherein performing measurements comprises:
measure a subframe based on all Cell Reference Symbols (CRS) symbols when the indicator indicates that MBSFN subframes are not configured for measurement restriction.
17 . The method of claim 15 wherein performing measurements comprises:
measuring a subframe based on all Cell Reference Symbols (CRS) symbols when the indicator indicates that MBSFN subframes are configured for measurement restriction and no MBSFN subframes are present in any neighboring cells.
18 . The apparatus of claim 1 wherein performing measurements comprises:
measuring a restricted measurements subframe based on all Cell Reference Symbols (CRS) symbols when
the indicator indicates that MBSFN subframes are configured for measurement restriction, and
subframe allocations of all neighbor cells are identical to or subsets of that in the serving cell, and
the restricted measurements subframe does not collide with a configured MBSFN subframe.
19 . The method of claim 15 wherein performing measurements comprises:
measuring a restricted measurements subframe based only on Cell Reference Symbols (CRS) of symbol #0 when
the indicator indicates that MBSFN subframes are configured for measurement restriction, and
MBSFN subframe allocations of all neighbor cells are identical to or subsets of that in the serving cell, and
the restricted measurements subframe does collide with a configured MBSFN subframe.
20 . The method of claim 15 wherein performing measurements comprises:
measuring a restricted measurements subframe based only on Cell Reference Symbols (CRS) of symbol #0 of the corresponding subframe #1,2,3,6,7 or 8 when
the indicator indicates that MBSFN subframes are configured for measurement restriction,
not all neighbor cells have the same MBSFN subframe allocation as the serving cell, and
the restricted measurements subframe corresponds to subframe #1,2,3,6,7 or 8, the processor is configured to.
21 . The method of claim 15 wherein performing measurements comprises:
measuring a restricted measurements subframe based all Cell Reference Symbols (CRS) of the corresponding subframe #0, 4, 5 or 9 when
the indicator indicates that MBSFN subframes are configured for measurement restriction, and
not all neighbor cells have the same MBSFN subframe allocation as the serving cell, and
the restricted measurements subframe corresponds to subframe #0, 4, 5 or 9.