Method and apparatus of virtualized resource sharing in cellular networks
View Patent ↗According to a disclosed method in a base station having one or more physical sectors, instructions received from a core network cellular network operators that are parties to a sharing agreement and specify an amount of radio resources that are to be temporarily shared under the sharing agreement. In the sharing state, the physical sector instantiates at least two concurrently running protocol stacks dedicated to respective cellular network operators that are parties to the sharing agreement, thus defining virtualized sectors.
1. A method in a base station having one or more physical sectors, comprising:
receiving instructions from a network node which identify two or more cellular network operators that are parties to a sharing agreement, and which specify an amount of radio resources that are to be temporarily shared under the sharing agreement;
activating a sharing state in a selected one or more of the physical sectors in response to the sharing instructions; and
deactivating the sharing state when the sharing agreement expires or terminates, wherein activating the sharing state in each said physical sector comprises:
configuring the physical sector to instantiate at least two concurrently running protocol stacks dedicated to respective cellular network operators that are parties to the sharing agreement, whereby respective virtualized sectors are defined;
configuring at least one software-defined programmable radiofrequency front end (SDRFfe) of the physical sector for operation on spectrum that is allocated in response to the sharing agreement; and
directing mobile terminals subscribing to two or more of the network operators and served by the physical sector to operate on radio resources allocated to their respective operators.
2. The method of claim 1 , wherein one of the parties to the sharing agreement is the cellular network operator that owns the base station.
3. The method of claim 1 , wherein the specified amount of radio resources to be shared is a specified amount of spectrum.
4. The method of claim 1 , wherein the specified amount of radio resources to be shared is a specified number of physical resource blocks.
5. The method of claim 1 , wherein:
the sharing instructions received by the base station specify center wavelengths and bandwidths of two or more frequency bands that are to be dedicated to respective parties to the sharing agreement; and
the step of configuring at least one SDRFfe comprises configuring the SDRFfe to operate on at least one of the specified frequency bands.
6. The method of claim 1 , wherein:
the physical sector comprises two or more physical or logical SDRFfes; and
the step of configuring at least one SDRFfe comprises configuring two or more physical or logical SDRFfes of the physical sector to operate on bands of spectrum allocated to respective operators in response to the sharing agreement.
7. The method of claim 1 , wherein:
the radio resources are Physical Resource Blocks (PRBs), and the method further comprises, in at least one sector that has been activated for a sharing state among two or more operators:
scheduling data traffic of said operators for transmission on PRBs, wherein said scheduling is performed in accordance with the sharing agreement; and
transmitting the PRBs from a single radiofrequency front end.
8. The method of claim 7 , wherein the step of configuring the physical sector to instantiate at least two concurrently running protocol stacks dedicated to respective cellular network operators comprises:
instantiating at least two concurrently running user-plane protocol stacks dedicated to respective cellular network operators; and
instantiating a control-plane protocol stack that is common to at least two of said operators and runs concurrently with said user-plane protocol stacks.
9. Base station apparatus, comprising:
at least one physical sector configurable to instantiate at least two concurrently running protocol stacks;
an activation module configured to activate a sharing state in at least one said physical sector in response to instructions to implement a sharing agreement received from a network node and to deactivate the sharing state when the sharing agreement expires or terminates, wherein the sharing state is characterized, in part, by concurrently running two or more protocol stacks dedicated to respective cellular network operators that are parties to the sharing agreement;
at least one software-defined programmable radiofrequency front end (SDRFfe) comprised by the physical sector;
a radio resource module configured to respond to the received instructions by configuring at least one said SDRFfe to operate on spectrum that is allocated in response to the sharing agreement; and
a module operative to direct mobile terminals subscribing to two or more of said network operators to operate on radio resources allocated to their respective operators.
10. The base station apparatus of claim 9 , wherein the radio resource module is responsive to the received instructions by configuring the SDRFfe to operate on one or more bands of spectrum specified in said instructions.
11. The base station apparatus of claim 9 , further comprising a scheduler configured to allocate physical resource blocks (PRBs) among two or more said operators.
12. The base station apparatus of claim 11 , wherein:
at least one said physical sector that can be activated for a sharing state among two or more operators has only a single radiofrequency front end; and
said single radiofrequency front end is configurable to transmit the PRBs to the two or more operators among which they have been allocated.
13. The base station apparatus of claim 12 , wherein the activation module is configured to respond to the received instructions by:
instantiating at least two concurrently running user-plane protocol stacks dedicated to respective cellular network operators; and
instantiating a control-plane protocol stack that is common to at least two of said operators and runs concurrently with said user-plane protocol stacks.
14. The base station apparatus of claim 9 , wherein the physical sector comprises two or more physical or logical SDRFfes.
15. The base station apparatus of claim 14 , wherein the radio resource module is able to configure two or more physical or logical SDRFfes of the physical sector to operate on bands of spectrum allocated to respective operators in response to the received instructions.