Control of Cell Search Procedure
A method, an apparatus and a computer program product for wireless communication, wherein the LTE HSPA carrier aggregation includes an improved HARQ feedback by optimizing the radio interface for the uplink direction.
1 . A method, comprising:
an apparatus for wireless communication connected to wireless network receiving a first downlink component carrier and a second downlink component carrier, the second component carrier comprising a shorter radio frame length than the first downlink component carrier;
rearranging the order of the feedback symbols, wherein said feedback symbols correspond to the first downlink component carriers; and
sending uplink a feedback report comprising feedback symbols via an uplink carrier comprising the same frame length as the second downlink carrier.
2 . The method according to claim 1 , comprising mapping to the feedback report:
in sequential order every second of the feedback symbols corresponding to the order of the first downlink component carriers,
wherein said feedback symbols form first feedback symbols.
3 . The method according to claim 2 , comprising mapping to the feedback report:
after the first feedback symbols in sequential order the remaining feedback symbols corresponding to the first downlink component carriers.
4 . The method according to claim 3 , comprising repeating the last feedback symbol in the feedback report if the number of the first downlink component carriers is not even.
5 . The method according to claim 1 , comprising mapping to the feedback report:
to the beginning of the feedback report the feedback symbols corresponding to the first portion of downlink component carriers; and
to the end of the feedback report the feedback symbols corresponding to the second portion of downlink component carriers.
6 . The method according to claim 1 , wherein the wireless network comprises a wireless network element assigning an SCell index to the component carrier; and
the apparatus for wireless communication rearranging feedback symbols in the order of SCell indexes of the corresponding component carriers.
7 . The method according to claim 1 , wherein the apparatus for wireless communication is configured to operate as part of a user equipment.
8 . An apparatus for wireless communication, comprising at least one processor configured to
receive a first downlink component carrier and a second downlink component carrier, the second component carrier comprising a shorter radio frame length than the first downlink component carrier;
rearrange the order of the feedback symbols, wherein said feedback symbols correspond to the first downlink component carriers; and
send uplink a feedback report comprising feedback symbols via an uplink carrier comprising the same frame length as the second downlink carrier.
9 . The apparatus according to claim 8 , configured to map to the feedback report:
in sequential order every second of the feedback symbols corresponding to the order of the first downlink component carriers,
wherein said feedback symbols form first feedback symbols.
10 . The apparatus according to claim 9 , configured to map to the feedback report:
after the first feedback symbols;
in sequential order the remaining feedback symbols corresponding to the first downlink component carriers.
11 . The apparatus according to claim 10 , configured to repeat the last feedback symbol in the feedback report if the number of the first downlink component carriers is not even.
12 . The apparatus according to claim 8 , configured to map to the feedback report:
to the beginning of the feedback report the feedback symbols corresponding to the first portion of downlink component carriers; and
to the end of the feedback report the feedback symbols corresponding to the second portion of downlink component carriers.
13 . The apparatus according to claim 8 , configured to rearrange feedback symbols in the order of SCell indexes of the corresponding component carriers.
14 . The apparatus according to claim 8 , configured to operate as part of a user equipment.
15 . A computer program product comprising a computer-readable medium bearing computer program code embodied therein for use with a computer, the computer program code comprising:
receiving a first downlink component carrier and a second downlink component carrier, the second component carrier comprising a shorter radio frame length than the first downlink component carrier;
rearranging the order of the feedback symbols, wherein said feedback symbols correspond to the first downlink component carriers; and
sending uplink a feedback report comprising feedback symbols via an uplink carrier comprising the same frame length as the second downlink carrier.
16 . The computer program product according to claim 15 , comprising mapping to the feedback report:
in sequential order every second of the feedback symbols corresponding to the order of the first downlink component carriers,
wherein said feedback symbols form first feedback symbols.
17 . The computer program product according to claim 16 , comprising mapping to the feedback report:
after the first feedback symbols in sequential order the remaining feedback symbols corresponding to the first downlink component carriers.
18 . The computer program product according to claim 17 , comprising repeating the last feedback symbol in the feedback report if the number of the first downlink component carriers is not even.
19 . The computer program product according to claim 15 , comprising mapping to the feedback report:
to the beginning of the feedback report the feedback symbols corresponding to the first portion of downlink component carriers; and
to the end of the feedback report the feedback symbols corresponding to the second portion of downlink component carriers.
20 . The computer program product according to claim 15 , comprising rearranging feedback symbols in the order of SCell indexes of the corresponding component carriers.