Channel Configuration in a Wireless Network
A base station may send, to a wireless device, control channel configuration information indicating various aspects of a control channel (e.g., radio resources, subframes, etc.) that may be used for data communications between the base station and wireless device.
1 . A method comprising:
receiving, by a wireless device:
a first plurality of synchronization signals, in a time interval, via a first downlink carrier corresponding to a first carrier type; and
a second plurality of synchronization signals, in the time interval, via a second downlink carrier corresponding to a second carrier type, wherein, in the time interval, the first plurality of synchronization signals of the first downlink carrier are offset, in symbols, from the second plurality of synchronization signals of the second downlink carrier, and wherein the second plurality of synchronization signals of the second downlink carrier overlap, in time, with a control channel of the first downlink carrier; and
communicating with a base station via the first downlink carrier and the second downlink carrier.
2 . The method of claim 1 , wherein the first plurality of synchronization signals comprise primary synchronization signals (PSS) of the first downlink carrier and secondary synchronization signals (SSS) of the first downlink carrier.
3 . The method of claim 1 , wherein the second plurality of synchronization signals comprise primary synchronization signals (PSS) of the second downlink carrier and secondary synchronization signals (SSS) of the second downlink carrier.
4 . The method of claim 1 , wherein, in the time interval, the first plurality of synchronization signals of the first downlink carrier do not overlap, in time, any of the second plurality of synchronization signals of the second downlink carrier.
5 . The method of claim 1 , further comprising receiving one or more messages indicating one or more offsets between the first plurality of synchronization signals and the second plurality of synchronization signals.
6 . The method of claim 1 , wherein transmissions via the first downlink carrier have a larger coverage area than transmissions via the second downlink carrier.
7 . The method of claim 1 , wherein the first downlink carrier and the second downlink carrier are Long-Term Evolution (LTE) carriers.
8 . The method of claim 1 , wherein each of the first downlink carrier and the second downlink carrier comprises orthogonal frequency division multiplexing (OFDM) subcarriers.
9 . The method of claim 1 , wherein the time interval is at least one of:
a slot;
a subframe;
a transmission time interval (TTI); or
a plurality of symbols.
10 . The method of claim 1 , wherein the first carrier type is associated with a first control channel type, and wherein the second carrier type is associated with a second control channel type.
11 . The method of claim 1 , wherein a subcarrier spacing for the first downlink carrier is different from a subcarrier spacing for the second downlink carrier.
12 . A method comprising:
receiving, by a wireless device:
a first plurality of synchronization signals, in a time interval, via a first downlink carrier corresponding to a first carrier type; and
a second plurality of synchronization signals, in the time interval, via a second downlink carrier corresponding to a second carrier type, wherein, in the time interval, the first plurality of synchronization signals of the first downlink carrier are offset, in symbols, from the second plurality of synchronization signals of the second downlink carrier, and wherein a time offset between the first plurality of synchronization signals and the second plurality of synchronization signals is different from a time offset between a boundary of a radio frame of the first downlink carrier and a boundary of a radio frame of the second downlink carrier; and
communicating with a base station via the first downlink carrier and the second downlink carrier.
13 . The method of claim 12 , wherein the first plurality of synchronization signals comprise primary synchronization signals (PSS) of the first downlink carrier and secondary synchronization signals (SSS) of the first downlink carrier.
14 . The method of claim 12 , wherein the second plurality of synchronization signals comprise primary synchronization signals (PSS) of the second downlink carrier and secondary synchronization signals (SSS) of the second downlink carrier.
15 . The method of claim 12 , wherein, in the time interval, the first plurality of synchronization signals of the first downlink carrier do not overlap, in time, any of the second plurality of synchronization signals of the second downlink carrier.
16 . The method of claim 12 , wherein, in the time interval, the second plurality of synchronization signals of the second downlink carrier overlap, in time, with a control channel of the first downlink carrier.
17 . The method of claim 12 , further comprising receiving one or more messages indicating one or more offsets between the first plurality of synchronization signals and the second plurality of synchronization signals.
18 . The method of claim 12 , wherein transmissions via the first downlink carrier have a larger coverage area than transmissions via the second downlink carrier.
19 . The method of claim 12 , wherein the first downlink carrier and the second downlink carrier are Long-Term Evolution (LTE) carriers.
20 . The method of claim 12 , wherein each of the first downlink carrier and the second downlink carrier comprises orthogonal frequency division multiplexing (OFDM) subcarriers.
21 . The method of claim 12 , wherein the time interval is at least one of:
a slot;
a subframe;
a transmission time interval (TTI); or
a plurality of symbols.
22 . The method of claim 12 , wherein a subcarrier spacing for the first downlink carrier is different from a subcarrier spacing for the second downlink carrier.
23 . The method of claim 12 , wherein the time offset between the boundary of the radio frame of the first downlink carrier and the boundary of the radio frame of the second downlink carrier is zero, and
wherein the boundary of the radio frame of the first downlink carrier is aligned with the boundary of the radio frame of the second downlink carrier.
24 . A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, configure the wireless device to:
receive:
a first plurality of synchronization signals, in a time interval, via a first downlink carrier corresponding to a first carrier type; and
a second plurality of synchronization signals, in the time interval, via a second downlink carrier corresponding to a second carrier type, wherein, in the time interval, the first plurality of synchronization signals of the first downlink carrier are offset, in symbols, from the second plurality of synchronization signals of the second downlink carrier, and wherein the second plurality of synchronization signals of the second downlink carrier overlap, in time, with a control channel of the first downlink carrier; and
communicate with a base station via the first downlink carrier and the second downlink carrier.
25 . The wireless device of claim 24 , wherein the first plurality of synchronization signals comprise primary synchronization signals (PSS) of the first downlink carrier and secondary synchronization signals (SSS) of the first downlink carrier.
26 . The wireless device of claim 24 , wherein the second plurality of synchronization signals comprise primary synchronization signals (PSS) of the second downlink carrier and secondary synchronization signals (SSS) of the second downlink carrier.
27 . The wireless device of claim 24 , wherein, in the time interval, the first plurality of synchronization signals of the first downlink carrier do not overlap, in time, any of the second plurality of synchronization signals of the second downlink carrier.
28 . The wireless device of claim 24 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to receive one or more messages indicating one or more offsets between the first plurality of synchronization signals and the second plurality of synchronization signals.
29 . The wireless device of claim 24 , wherein transmissions via the first downlink carrier have a larger coverage area than transmissions via the second downlink carrier.
30 . The wireless device of claim 24 , wherein the first downlink carrier and the second downlink carrier are Long-Term Evolution (LTE) carriers.
31 . The wireless device of claim 24 , wherein each of the first downlink carrier and the second downlink carrier comprises orthogonal frequency division multiplexing (OFDM) subcarriers.
32 . The wireless device of claim 24 , wherein the time interval is at least one of:
a slot;
a subframe;
a transmission time interval (TTI); or
a plurality of symbols.
33 . The wireless device of claim 24 , wherein the first carrier type is associated with a first control channel type, and wherein the second carrier type is associated with a second control channel type.
34 . The wireless device of claim 24 , wherein a subcarrier spacing for the first downlink carrier is different from a subcarrier spacing for the second downlink carrier.
35 . A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, configure the wireless device to:
receve:
a first plurality of synchronization signals, in a time interval, via a first downlink carrier corresponding to a first carrier type; and
a second plurality of synchronization signals, in the time interval, via a second downlink carrier corresponding to a second carrier type, wherein, in the time interval, the first plurality of synchronization signals of the first downlink carrier are offset, in symbols, from the second plurality of synchronization signals of the second downlink carrier, and wherein a time offset between the first plurality of synchronization signals and the second plurality of synchronization signals is different from a time offset between a boundary of a radio frame of the first downlink carrier and a boundary of a radio frame of the second downlink carrier; and
communicate with a base station via the first downlink carrier and the second downlink carrier.
36 . The wireless device of claim 35 , wherein the first plurality of synchronization signals comprise primary synchronization signals (PSS) of the first downlink carrier and secondary synchronization signals (SSS) of the first downlink carrier.
37 . The wireless device of claim 35 , wherein the second plurality of synchronization signals comprise primary synchronization signals (PSS) of the second downlink carrier and secondary synchronization signals (SSS) of the second downlink carrier.
38 . The wireless device of claim 35 , wherein, in the time interval, the first plurality of synchronization signals of the first downlink carrier do not overlap, in time, any of the second plurality of synchronization signals of the second downlink carrier.
39 . The wireless device of claim 35 , wherein, in the time interval, the second plurality of synchronization signals of the second downlink carrier overlap, in time, with a control channel of the first downlink carrier.
40 . The wireless device of claim 35 , wherein the instructions, when executed by the one or more processors, further configure the wireless device to receive one or more messages indicating one or more offsets between the first plurality of synchronization signals and the second plurality of synchronization signals.
41 . The wireless device of claim 35 , wherein transmissions via the first downlink carrier have a larger coverage area than transmissions via the second downlink carrier.
42 . The wireless device of claim 35 , wherein the first downlink carrier and the second downlink carrier are Long-Term Evolution (LTE) carriers.
43 . The wireless device of claim 35 , wherein each of the first downlink carrier and the second downlink carrier comprises orthogonal frequency division multiplexing (OFDM) subcarriers.
44 . The wireless device of claim 35 , wherein the time interval is at least one of:
a slot;
a subframe;
a transmission time interval (TTI); or
a plurality of symbols.
45 . The wireless device of claim 35 , wherein a subcarrier spacing for the first downlink carrier is different from a subcarrier spacing for the second downlink carrier.
46 . The wireless device of claim 35 , wherein the time offset between the boundary of the radio frame of the first downlink carrier and the boundary of the radio frame of the second downlink carrier is zero, and
wherein the boundary of the radio frame of the first downlink carrier is aligned with the boundary of the radio frame of the second downlink carrier.