CHANNEL RESERVATION SIGNALS FOR NEW RADIO INTERFERENCE MANAGEMENT

• US 20180167848A1
• Filed: 07/28/2017
• Published: 06/14/2018
• Est. Priority Date: 12/09/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Lei, Jing, Yoo, Taesang, Zhang, Xiaoxia, Sun, Jing, Kadous, Tamer
• Granted Patent: US 10,856,185 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/0816 with collision avoidance

Abstract

Channel reservation systems and methods are disclosed herein, which schedule transmissions on a shared radio medium that is shared by a plurality of licensed network operators. In embodiments, priority access is pre-assigned to the network and the method determines whether to send a transmission based at least on the transmitter'"'"'s priority class as compared to another transmitter'"'"'s priority class and to which transmitter the time slot of a signal is dedicated. In embodiments, priority access may not be preassigned to the network and pre-grants may be used in conjunction with CR-Ts and CR-Rs to determine whether a transmitter transmits.

Claims

1. A channel reservation method comprising:

reducing contention of access to a shared radio medium of a network that is shared by a plurality of licensed network operators by performing a hand-shaking operation; and

scheduling transmissions on the shared radio medium.

2. The method of claim 1, wherein time priority access has been assigned to the network, and wherein the reducing comprises:

listening, by a second classified eNB, for an RRS that was sent by a first classified eNB; and

based at least on the listening, determining, by the second classified eNB, whether to send a transmission on the shared radio medium,

wherein the first classified eNB is assigned a higher priority as compared to the second classified eNB, when transmitting on the shared radio medium.

3. The method of claim 1, wherein time priority access has been assigned to the network, and wherein the reducing comprises:

listening, by a second classified eNB, for an RRQ sent by a first classified eNB; and

based at least on the listening, determining, by the second classified eNB, whether to send a transmission on the shared radio medium,

wherein the first classified eNB is assigned a higher priority as compared to the second classified eNB, when transmitting on the shared radio medium.

4. The method of claim 3 further comprising:

deciding, by the second classified eNB, that the first classified eNB has scheduled a transmission; and

based at least on the deciding, refraining, by the second classified eNB, from transmitting during the transmission of the first classified eNB.

5. The method of claim 3 further comprising:

deciding, by the second classified eNB, that the first classified eNB has not scheduled a transmission; and

based at least on the deciding, scheduling, by the second classified eNB, a transmission using the shared radio medium.

6. A channel reservation method comprising:

reducing contention of access to a shared radio medium of a network that is shared by a plurality of licensed network operators by performing a hand-shaking operation; and

scheduling transmissions on the shared radio medium, wherein time priority access has not been assigned to the network, and wherein the reducing comprises;

obtaining, at a transmitter, a contention pre-grant request including a schedule of communication between the transmitter and one or more receivers,

transmitting, by the transmitter, a transmitter channel reservation signal identifying an intent to transmit data to one or more target receivers associated with the communication and a transmission power level intended for the data transmission, wherein the one or more target receivers are one or more of the one or more receivers,

receiving, at the transmitter, one or more receiver channel reservation signals from the one or more receivers, wherein the one or more receiver channel reservation signals identifies an intent to receive, a receive transmit power level of the receiver channel reservation signal, and a maximum interference level acceptable of each of the one or more receivers,

determining, by the transmitter, an interference level expected at each of the one or more receivers based on the transmission power level during the data transmission, and

managing transmission, by the transmitter, of the data based at least in part on comparison of the interference level and the maximum interference level.

7. The method of claim 6, wherein the managing transmission includes one of:

transmitting the data to the one or more target receivers at the transmission power level;

transmitting the data to the one or more target receivers at a reduced transmission power level lower than the transmission power level;

or

declining the schedule of communication for the transmission of the data.

8. The method of claim 6, wherein the one or more receiver channel reservation signals are received prior to the transmitting, the determining, and the managing, the method further including:

performing the determining in response to reception of the one or more receiver channel reservation signals, wherein the managing the transmission includes;

refraining from the transmitting the transmitter channel reservation signal; and

declining the schedule of communication for the transmission of the data.

9. A channel reservation system comprising:

one or more transmitting devices that reduce contention of access to a shared radio medium that is shared by a plurality of licensed network operators by performing a hand-shaking operation; and

one or more processors that schedule transmissions on the shared radio medium.

10. The system of claim 9 wherein the one or more transmitting device is a second classified eNB, wherein the second classified eNB comprises:

an eNB processor operable to listen for an RRS that was sent by a first classified eNB,

wherein the eNB processor is further operable to determine whether to send a transmission on the shared radio medium based at least on the listening;

wherein the first classified eNB is assigned a higher priority as compared to the second classified eNB, when transmitting on the shared radio medium; and

an eNB transmitter operable to send a transmission on the shared radio medium.

11. The system of claim 9 wherein the one or more transmitting device is a second classified eNB, wherein the second classified eNB comprising:

an eNB processor operable to listen for an RRQ sent by a first classified eNB,

wherein the eNB processor is further operable to determine whether to send a transmission on the shared radio medium based at least on the listening;

wherein the first classified eNB is assigned a higher priority as compared to the second classified eNB, when transmitting on the shared radio medium; and

an eNB transmitter operable to send a transmission on the shared radio medium.

12. The system of claim 11, wherein the eNB processor is further operable to determine that the first classified eNB has scheduled a transmission, and based at least on the determination, the eNB transmitter is operable to refrain from transmitting during the transmission of the first classified eNB.

13. The system of claim 11, wherein based at least on the determination, the eNB processor is further operable to decide that the first classified eNB has not scheduled a transmission,

and based at least on the decision, the eNB transmitter is further operable to transmit a transmission using the shared radio medium.

14. The second classified eNB of claim 13, wherein the eNB processor is operable to schedule the transmission by at least:

directing the eNB transmitter to;

send an RRQ during the second classified eNB'"'"'s assigned RRQ time slot within the shared radio medium, and

send an RRS during the second classified eNB'"'"'s assigned RRS time slot within the shared radio medium; and

directing an eNB receiver to receive an uplink transmission on the shared radio medium.

15. A channel reservation system comprising:

one or more transmitting devices that reduce contention of access to a shared radio medium that is shared by a plurality of licensed network operators by performing a hand-shaking operation; and

one or more processors that schedule transmissions on the shared radio medium, wherein the one or more transmitting devices are an apparatus configured for wireless communication, the apparatus comprising;

at least one processor configured;

to obtain, at a transmitter, a contention pre-grant request including a schedule of communication between the transmitter and one or more receivers,

to transmit, by the transmitter, a transmitter channel reservation signal identifying an intent to transmit data to one or more target receivers associated with the communication and a transmission power level intended for the data transmission, wherein the one or more target receivers are one or more of the one or more receivers,

to receive, at the transmitter, one or more receiver channel reservation signals from the one or more receivers, wherein the one or more receiver channel reservation signals identifies an intent to receive, a receive transmit power level of the receiver channel reservation signal, and a maximum interference level acceptable of each of the one or more receivers,

to determine, by the transmitter, an interference level expected at each of the one or more receivers based on the transmission power level during the data transmission, and

to manage transmission, by the transmitter, of the data based at least in part on comparison of the interference level and the maximum interference level.

16. The system of claim 15, wherein the configuration of the at least one processor to manage transmission includes one of:

to transmit the data to the one or more target receivers at the transmission power level;

to transmit the data to the one or more target receivers at a reduced transmission power level lower than the transmission power level;

or

to decline the schedule of communication for the transmission of the data.

17. The system of claim 15,

wherein the transmit channel reservation signal includes a transmitter priority associated with the transmitter and the one or more receiver channel reservation signals includes a receiver priority associated with each of the one or more receivers, and

wherein the configuration of the at least one processor to manage transmission is further based on a relationship between the transmitter priority and the receiver priority.

18. The system of claim 15,

wherein the one or more receiver channel reservation signals are received prior to execution of the configuration of the at least one processor to transmit, to determine, and to manage, the apparatus further including configuration of the at least one processor to execute the configuration to determine in response to reception of the one or more receiver channel reservation signals, wherein the configuration of the at least one processor to manage the transmission includes configuration of the at least one processor:

to refrain from transmitting the transmitter channel reservation signal; and

to decline the schedule of communication for the transmission of the data.

19. The system of claim 15,

wherein the one or more receiver channel reservation signals are received prior to execution of the configuration of the at least one processor to transmit, to determine, and to manage, the apparatus further including configuration of the at least one processor:

to execute the configuration to determine in response to reception of the one or more receiver channel reservation signals;

to execute the configuration to transmit in response to the interference level falling below the maximum interference level;

to receive one or more additional receiver channel reservation signals, wherein the one or more receiver channel reservation signals include reduced maximum level of interference acceptable by each of the one or more receivers, wherein the reduced maximum level of interference is less than the maximum level of interference;

to determine, by the transmitter, a new interference level expected at each of the one or more receivers based on transmission of the data at the transmission power level, wherein the configuration of the at least one processor to manage the transmission includes configuration of the at least one processor to one of;

transmit the data to the one or more target receivers at the transmission power level;

transmit the data to the one or more target receivers at a reduced transmission power level lower than the transmission power level;

or

decline the schedule of communication for the transmission of the data.

20. A non-transitory computer-readable medium having program code recorded thereon, which causes channel reservation, the program code comprising:

code for reducing contention of access to a shared radio medium of a network that is shared by a plurality of licensed network operators by performing a hand-shaking operation; and

code for scheduling transmissions on the shared radio medium.

21. The non-transitory computer-readable medium of claim 20, wherein time priority access has been assigned to the network, and wherein the code for reducing comprises:

code for listening, by a second classified eNB, for an RRS that was sent by a first classified eNB; and

based at least on the listening, code for determining, by the second classified eNB, whether to send a transmission on the shared radio medium,

wherein the first classified eNB is assigned a higher priority as compared to the second classified eNB, when transmitting on the shared radio medium.

22. The non-transitory computer-readable medium of claim 20, wherein time priority access has been assigned to the network, and wherein the code for reducing comprises:

code for listening, by a second classified eNB, for an RRQ sent by a first classified eNB; and

based at least on the listening, code for determining, by the second classified eNB, whether to send a transmission on the shared radio medium,

wherein the first classified eNB is assigned a higher priority as compared to the second classified eNB, when transmitting on the shared radio medium.

23. The non-transitory computer-readable medium of claim 22 further comprising:

code for deciding, by the second classified eNB, that the first classified eNB has scheduled a transmission; and

based at least on the deciding, code for refraining, by the second classified eNB, from transmitting during the transmission of the first classified eNB.

24. The non-transitory computer-readable medium of claim 22 further comprising:

code for deciding, by the second classified eNB, that the first classified eNB has not scheduled a transmission; and

based at least on the deciding, code for scheduling, by the second classified eNB, a transmission using the shared radio medium.

25. The non-transitory computer-readable medium of claim 24 further comprising:

code for sending an RRQ during the second classified eNB'"'"'s assigned RRQ time slot within the shared radio medium;

code for sending an RRS during the second classified eNB'"'"'s assigned RRS time slot within the shared radio medium; and

code for receiving an uplink transmission on the shared radio medium.

26. The non-transitory computer-readable medium of claim 24 further comprising:

code for sending an RRQ during the second classified eNB'"'"'s assigned RRQ time slot within the shared radio medium;

code for receiving an RRS during the second classified eNB'"'"'s assigned RRS time slot within the shared radio medium; and

code for sending a downlink transmission on the shared radio medium.

27. A non-transitory computer-readable medium having program code recorded thereon, which causes channel reservation, the program code comprising:

code for reducing contention of access to a shared radio medium of a network that is shared by a plurality of licensed network operators by performing a hand-shaking operation; and

code for scheduling transmissions on the shared radio medium, wherein time priority access has not been assigned to the network, and wherein the code for reducing comprises;

code for obtaining, at a transmitter, a contention pre-grant request including a schedule of communication between the transmitter and one or more receivers,

code for transmitting, by the transmitter, a transmitter channel reservation signal identifying an intent to transmit data to one or more target receivers associated with the communication and a transmission power level intended for the data transmission, wherein the one or more target receivers are one or more of the one or more receivers,

code for receiving, at the transmitter, one or more receiver channel reservation signals from the one or more receivers, wherein the one or more receiver channel reservation signals identifies an intent to receive, a receive transmit power level of the receiver channel reservation signal, and a maximum interference level acceptable of each of the one or more receivers,

code for determining, by the transmitter, an interference level expected at each of the one or more receivers based on the transmission power level during the data transmission, and

code for managing transmission, by the transmitter, of the data based at least in part on comparison of the interference level and the maximum interference level.

28. The non-transitory computer-readable medium of claim 27, wherein the managing transmission includes one of:

code for transmitting the data to the one or more target receivers at the transmission power level;

code for transmitting the data to the one or more target receivers at a reduced transmission power level lower than the transmission power level;

or

code for declining the schedule of communication for the transmission of the data.

29. The non-transitory computer-readable medium of claim 27, wherein the one or more receiver channel reservation signals are received prior to the transmitting, the code for determining, and the code for managing, the program code further including:

code for performing the determining in response to reception of the one or more receiver channel reservation signals, wherein the code for managing the transmission includes;

code for refraining from the transmitting the transmitter channel reservation signal; and

code for declining the schedule of communication for the transmission of the data.

30. A non-transitory computer-readable medium of claim 27, wherein the one or more receiver channel reservation signals are received prior to the transmitting, the code for determining, and the code for managing, the program code further including:

code for performing the determining in response to reception of the one or more receiver channel reservation signals;

code for transmitting in response to the interference level falling below the maximum interference level;

code for receiving one or more additional receiver channel reservation signals, wherein the one or more receiver channel reservation signals include reduced maximum level of interference acceptable by each of the one or more receivers, wherein the reduced maximum level of interference is less than the maximum level of interference;

code for determining, by the transmitter, a new interference level expected at each of the one or more receivers based on transmission of the data at the transmission power level, wherein the program code executable by the computer for causing the computer to manage the transmission includes one of;

code for transmitting the data to the one or more target receivers at the transmission power level;

coded for transmitting the data to the one or more target receivers at a reduced transmission power level lower than the transmission power level;

or

code for declining the schedule of communication for the transmission of the data.