Dual non-contiguous channel allocation for reliable communication
In order to facilitate communication in a shared-license-access band of frequencies, an electronic device (such as an electronic device that implements a spectrum allocation service) allocates, to a radio node in a set of radio nodes, at least a first channel and a second channel in unallocated channels in the shared-license-access band of frequencies. Note that the first channel and the second channel are noncontiguous in the shared-license-access band of frequencies. Then, the electronic device monitors for transmissions by a higher-priority user than the set of radio nodes in the shared-license-access band of frequencies. When the transmissions are detected in the first channel, the electronic device instructs the radio node to discontinue use of the first channel, where allocation of at least the second channel allows uninterrupted communication by the radio node in the shared-license-access band of frequencies.
1. An electronic device, comprising:
an interface circuit that is configured to communicate with a set of radio nodes, wherein the electronic device is configured to:
access predefined channel allocations in a shared-license-access band of frequencies, wherein the shared-license-access band of frequencies is shared by the set of radio nodes with another user that has higher priority than the set of radio nodes;
allocate, to a radio node in the set of radio nodes, at least a first channel and a second channel in unallocated channels in the shared-license-access band of frequencies based on the predefined channel allocations, wherein the first channel and the second channel are noncontiguous in the shared-license-access band of frequencies, and
wherein, when the radio node communicates using a Long Term Evolution (LTE) communication protocol, the first channel and the second channel are control channels, and, when the radio node communicates using an IEEE 802.11 communication protocol, the first channel and the second channel are primary channels;
monitor for transmissions by the higher-priority user in the shared-license-access band of frequencies; and
when the transmissions are detected in the first channel, instruct the radio node to discontinue use of the first channel, wherein allocation of at least the second channel allows uninterrupted communication by the radio node in the shared-license-access band of frequencies,
wherein a subset of the set of radio nodes releases the first channel immediately in response to the instruction while a remainder of the set of radio nodes release the first channel within a time period;
wherein, during the time period and when the radio node is in the subset of the set of radio node, the electronic device is configured to provide, to the radio node, first instructions for a first forced handover, to one of the remainder of the set of radio nodes, of communication with another electronic device; and
wherein, during the time period and when the radio node is in the remainder of the set of radio node, the electronic device is configured to provide, to the radio node, second instructions for a second forced handover, from another radio node in the subset of the set of radio nodes, of communication with an additional portable electronic device, the instructions being received from one of: a controller and the other radio node.
2. The electronic device of claim 1 , wherein the first channel and the second channel are as far apart as is possible in the unallocated channels.
3. The electronic device of claim 1 , wherein the radio node communicates using a single carrier frequency and, at a given time, the radio node transmits frames using one of the first channel and the second channel; and
wherein the uninterrupted communication involves a third handover from the first channel to the second channel.
4. The electronic device of claim 3 , wherein different pairs of noncontiguous channels are allocated to each of the set of radio nodes.
5. The electronic device of claim 3 , wherein the first channel and the second channel are allocated to the set of radio nodes.
6. The electronic device of claim 5 , wherein, when the transmissions are detected, the electronic device is configured to instruct the set of radio nodes to discontinue use of the first channel.
7. The electronic device of claim 1 , wherein the radio node communicates using multiple carrier frequencies and the radio node simultaneously transmits frames using the first channel and the second channel.
8. The electronic device of claim 1 , wherein the set of radio nodes communicate frames using one of: the LTE communication protocol, and the IEEE 802.11 communication protocol.
9. A method for allocating channels in a shared-license-access band of frequencies, wherein the method comprises:
accessing predefined channel allocations in the shared-license-access band of frequencies, wherein the shared-license-access band of frequencies is shared by the set of radio nodes with another user that has higher priority than the set of radio nodes;
allocating, to a radio node in the set of radio nodes, at least a first channel and a second channel in unallocated channels in the shared-license-access band of frequencies based on the predefined channel allocations, wherein the first channel and the second channel are noncontiguous in the shared-license-access band of frequencies, and
wherein, when the radio node communicates using a Long Term Evolution (LTE) communication protocol, the first channel and the second channel are control channels, and, when the radio node communicates using an IEEE 802.11 communication protocol, the first channel and the second channel are primary channels;
monitoring for transmissions by the higher-priority user in the shared-license-access band of frequencies; and
when the transmissions are detected in the first channel, instructing the radio node to discontinue use of the first channel, wherein allocation of at least the second channel allows uninterrupted communication by the radio node in the shared-license-access band of frequencies,
wherein a subset of the set of radio nodes releases the first channel immediately in response to the instruction while a remainder of the set of radio nodes release the first channel within a time period;
wherein, during the time period and when the radio node is in the subset of the set of radio node, the electronic device is configured to provide, to the radio node, first instructions for a first forced handover, to one of the remainder of the set of radio nodes, of communication with another electronic device; and
wherein, during the time period and when the radio node is in the remainder of the set of radio node, the electronic device is configured to provide, to the radio node, second instructions for a second forced handover, from another radio node in the subset of the set of radio nodes, of communication with an additional portable electronic device, the instructions being received from one of: a controller and the other radio node.
10. A radio node, comprising:
an interface circuit that is configured to communicate with an electronic device, wherein the radio node is configured to:
receive, from the electronic device, allocation of at least a first channel and a second channel in a shared-license-access band of frequencies, wherein the radio node is included in a set of radio nodes,
wherein the first channel and the second channel are noncontiguous in the shared-license-access band of frequencies,
wherein the shared-license-access band of frequencies is shared by the set of radio nodes with another user that has higher priority than the set of radio nodes, and
wherein, when the radio node communicates using a Long Term Evolution (LTE) communication protocol, the first channel and the second channel are control channels, and,
when the radio node communicates using an IEEE 802.11 communication protocol, the first channel and the second channel are primary channels;
receive, from the electronic device, an instruction to discontinue use of the first channel when transmissions by the higher-priority user in the first channel in the shared-license-access band of frequencies are present; and
maintain uninterrupted communication in the shared-license-access band of frequencies by using the second channel,
wherein a subset of the set of radio nodes releases the first channel immediately in response to the instruction while a remainder of the set of radio nodes release the first channel within a time period;
wherein, during the time period and when the radio node is in the subset of the set of radio node, the electronic device is configured to provide, to the radio node, first instructions for a first forced handover, to one of the remainder of the set of radio nodes, of communication with another electronic device; and
wherein, during the time period and when the radio node is in the remainder of the set of radio node, the electronic device is configured to provide, to the radio node, second instructions for a second forced handover, from another radio node in the subset of the set of radio nodes, of communication with an additional portable electronic device, the instructions being received from one of: a controller and the other radio node.
11. The radio node of claim 10 , wherein the radio node communicates using a single carrier frequency and, at a given time, the radio node transmits frames using one of the first channel and the second channel; and
wherein the uninterrupted communication involves a third handover from the first channel to the second channel.
12. The radio node of claim 11 , wherein different pairs of noncontiguous channels are allocated to each of the set of radio nodes.
13. The radio node of claim 11 , wherein the first channel and the second channel are allocated to the set of radio nodes.
14. The radio node of claim 10 , wherein the subset of the set of radio nodes and the remainder of the set of radio nodes are one of: predefined by the controller; determined using distributed control based on predefined groups of radio nodes in the set of radio nodes; and determined using distributed control by the set of radio nodes.
15. The radio node of claim 10 , wherein the radio node communicates using multiple carrier frequencies and the radio node simultaneously transmits frames using the first channel and the second channel.
16. The radio node of claim 10 , wherein the radio node communicates using a single carrier frequency and, at a given time, the radio node transmits frames using one of the first channel and the second channel;
wherein the uninterrupted communication involves a third handover from the first channel to the second channel; and
wherein the radio node is configured to increase a transmit power during the third handover.
17. The method of claim 9 , wherein the radio node communicates using multiple carrier frequencies and the radio node simultaneously transmits frames using the first channel and the second channel.
18. The method of claim 9 , wherein the radio node communicates using a single carrier frequency and, at a given time, the radio node transmits frames using one of the first channel and the second channel; and
wherein the uninterrupted communication involves a third handover from the first channel to the second channel.
19. The method of claim 9 , wherein the radio node communicates using multiple carrier frequencies and the radio node simultaneously transmits frames using the first channel and the second channel.
20. The method of claim 9 , wherein the first channel and the second channel are as far apart as is possible in the unallocated channels.