Wake-up transmission on a separate carrier
A method includes communicating, from an access node ( 111, 112 ) of a network ( 100 ) and to a terminal ( 101 ), a wake-up signal ( 4003 ) on a first carrier ( 280, 280 - 1 ) occupying a first frequency band ( 281 ); and in response to communicating the wake-up signal ( 4003 ): communicating at least one further signal ( 4002, 4004, 4005, 4050 ) on a second carrier ( 280 - 2 ) occupying a second frequency band ( 282 ). The first frequency band ( 281 ) is offset in frequency domain from the second frequency band ( 282 ).
1. A method of operating an access node, the method comprising:
communicating, from the access node of a network and to a terminal, a wake-up signal on a first carrier occupying a first frequency band; and
in response to communicating the wake-up signal:
communicating by the access node at least one further signal on a second carrier occupying a second frequency band, wherein the at least one further signal comprises an uplink random access preamble of a random access transmission,
wherein the first frequency band is offset in frequency domain from the second frequency band,
wherein the wake-up signal comprises a pointer towards the at least one further signal,
wherein the pointer directs activity of the terminal towards receiving the at least one further signal.
2. The method of claim 1 , wherein:
the first frequency band is subject to first access regulations; and
the second frequency band is subject to second access regulation different from the first access regulations.
3. The method of claim 2 , wherein:
the first access regulations comprise a first maximum channel access duty cycle;
the second access regulations comprise a second maximum channel access duty cycle; and
the first maximum channel access duty cycle is smaller than the second maximum channel access duty cycle.
4. The method of claim 1 , wherein:
the first carrier operates using a first timing reference; and
the second carrier operates using a second timing reference different from the first timing reference.
5. The method of claim 1 , wherein the pointer directs the activity of the terminal to time-frequency resources of a resource grid defined by the second carrier and allocated to the at least one further signal.
6. The method of claim 1 , wherein the pointer directs the activity of the terminal to a time window for the terminal to receive the at least one further signal.
7. The method of claim 1 , wherein the at least one further signal comprises a paging signal.
8. The method of claim 1 , wherein the at least one further signal comprises a payload signal encoding payload data.
9. The method of claim 8 , wherein the terminal is operated in a connected mode, when communicating the wake-up signal.
10. The method of claim 1 , wherein the at least one further signal comprises a downlink scheduling control signal indicative of time-frequency resources of a payload signal encoding payload data.
11. The method of claim 1 , further comprising:
communicating, between the access node and the terminal, configuration data associated with the first carrier using at least one of a one-to-one transmission and a broadcast transmission on the second carrier.
12. The method of claim 11 , wherein the configuration data is indicative of a system identification registered to transmission on the first carrier.
13. The method of claim 1 , further comprising:
communicating, from the access node and to the terminal, at least one further control signal on the first carrier, the at least one further control signal being at least one of a channel reference signal and a synchronization signal.
14. The method according to claim 1 , further comprising:
communicating a wake-up signal on the second carrier from the access node of the network to a second terminal.
15. The method of claim 1 , wherein the wake-up signal comprises control information that initializes a timer of the terminal.
16. The method of claim 1 , wherein the wake-up signal is indicative of a timing that defines a time window.
17. The method of claim 16 , wherein the timing defines the time window in terms of one or more sequence numbers of transmission frames used by the second carrier.
18. A method of operating an access node, the method comprising:
communicating, from the access node of a network and to a terminal, a wake-up signal on a first carrier occupying a first frequency band;
in response to communicating the wake-up signal:
communicating by the access node at least one further signal on a second carrier occupying a second frequency band; and
communicating, between the access node and the terminal and on the second carrier, a wake-up identity selected from a set of wake-up identities allocated to wake-up transmission on the first carrier, wherein the wake-up signal is indicative of the wake-up identity,
wherein the first frequency band is offset in frequency domain from the second frequency band,
wherein the wake-up signal comprises a pointer towards the at least one further signal,
wherein the pointer directs activity of the terminal towards receiving the at least one further signal.
19. A method of operating an access node, the method comprising:
communicating, from the access node of a network and to a terminal, a wake-up signal on a first carrier occupying a first frequency band;
in response to communicating the wake-up signal:
communicating by the access node at least one further signal on a second carrier occupying a second frequency band; and
maintaining a registry indicative of allocations between terminals and carriers for wake-up signal transmission,
wherein the first frequency band is offset in frequency domain from the second frequency band,
wherein the wake-up signal comprises a pointer towards the at least one further signal,
wherein the pointer directs activity of the terminal towards receiving the at least one further signal.
20. A method, comprising:
allocating a first plurality of terminals to wake-up signal transmission on a first carrier; and
allocating a second plurality of terminals to wake-up signal transmission on a second carrier,
wherein a first frequency band occupied by the first carrier is offset in frequency domain from a second frequency band occupied by the second carrier.
21. The method of claim 20 , further comprising:
allocating the first plurality of terminals and the second plurality of terminals to payload data transmission on the second carrier.