Handling multiple transmission opportunities in a paging occasion
A method is provided for use in a network node in wireless communications network. The method includes determining, a plurality of transmission opportunities, TXOPs, in which to attempt to transmit a paging signal in a plurality of beams. The plurality of beams have a beam order. The method further includes assigning a predetermined number of the plurality of TXOPs to each beam of the plurality of beams, wherein none of the TXOPs is assigned to more than one beam. The method further includes performing at least one clear channel assessment, CCA, before transmitting the paging signal in one of the TXOPs. The method further includes transmitting the paging signal in a first beam of the plurality of beams using one of the plurality of TXOPs assigned to the first beam based on a first successful CCA covering the used TXOP.
1. A method for use in a network node in wireless communications network, the method comprising:
determining a plurality of transmission opportunities, TXOPs, in which to attempt to transmit a paging signal in a plurality of beams, wherein the plurality of beams have a beam order;
assigning a predetermined number of the plurality of TXOPs to each beam of the plurality of beams, wherein none of the TXOPs is assigned to more than one beam and wherein the predetermined number is greater than one;
performing at least one clear channel assessment, CCA, before transmitting the paging signal in one of the TXOPs; and
upon successful CCA, transmitting the paging signal in a first beam of the plurality of beams using a first TXOP of the plurality of TXOPs assigned to the first beam, and
upon a failed CCA, performing a second CCA and transmitting the paging signal in a second beam of the plurality of beams using a first TXOP of the plurality of TXOPs assigned to the second beam, the second beam being after the first beam in the beam order, and transmitting the first beam of the plurality of beams using a second TXOP of the plurality of TXOPs assigned to the first beam based on a successful second CCA, wherein the first TXOP of the plurality of TXOPs assigned to the second beam occurs after the first TXOP assigned to the first beam and before the second TXOP assigned to the first beam, the second TXOP assigned to the first beam occurring later in time than the first TXOP assigned to the first beam.
2. The method of claim 1 , wherein assigning a predetermined number of the plurality of TXOPs to each beam of the plurality of beams comprises:
assigning at least a first sequence of TXOPs of the plurality of TXOPs to the plurality of beams in same order as the beam order.
3. The method of claim 2 , further comprising:
performing a first CCA, the first CCA covering each TXOP in the first sequence of TXOPs, wherein the first CCA is either successful or unsuccessful;
in response to the first CCA being successful, transmitting the paging signal on each of the plurality of beams using each of the first sequence of TXOPs; and
in response to the first CCA being unsuccessful, abstaining from transmitting the paging signal on any of the plurality of beams using any of the first sequence of TXOPs.
4. The method of claim 2 , further comprising:
performing a first CCA after at least one TXOP of the first sequence of TXOPs has passed, wherein the first CCA covers each remaining TXOP in the first sequence of TXOPs; and
in response to the first CCA being successful, transmitting the paging signal at least on each of a plurality of remaining beams using each of the remaining TXOPs in the first sequence of TXOPs, wherein the plurality of remaining beams are beams of the plurality of beams to which the remaining TXOPs in the first sequence of TXOPs have been assigned.
5. The method of claim 2 , wherein a predetermined number of the plurality of TXOPs to each beam of the plurality of beams further comprises:
assigning a second sequence of TXOPs of the plurality of TXOPs to the plurality of beams in the same order as the beam order, wherein the first TXOP of the second sequence of TXOPs corresponds to the TXOP in the plurality of TXOPs that follows directly after the last TXOP of the first sequence of TXOPs.
6. The method of claim 5 , further comprising:
performing a first CCA after at least one TXOP of the first sequence of TXOPs has passed, wherein the first CCA covers each remaining TXOP in the first sequence of TXOPs and at least one TXOP of the second sequence of TXOPs; and
in response to the first CCA being successful, transmitting the paging signal at least on:
each of a plurality of remaining beams using each of the remaining TXOPs in the first sequence of TXOPs, wherein the plurality of remaining beams are beams of the plurality of beams to which the remaining TXOPs in the first sequence of TXOPs have been assigned; and
the at least one TXOP of the second sequence of TXOPs.
7. The method of claim 6 , wherein the at least one TXOP of the second sequence of TXOPs contains a number of sequential TXOP(s) equal to the number of beams in the plurality of beams that were not transmitted in the TXOPs of the first sequence of TXOPs.
8. The method of claim 1 , further comprising:
attempting to transmit on all TXOPs of the plurality of TXOPs assigned to the first beam regardless of a previous success of transmitting the paging signal on the first beam in a previous TXOP assigned to the first beam.
9. The method of claim 1 , further comprising using one of the plurality of TXOPs to transmit a signal other than the paging signal.
10. The method of claim 1 , further comprising mapping a plurality of synchronization signal block beams to the plurality of beams used for the paging signal, wherein the number of synchronization signal block beams is greater than the number of the plurality of beams used for the paging signal.
11. A network node in a wireless communications network, the network node comprising:
a memory configured to store instructions; and
processing circuitry configured to execute the instructions, whereby the network node is configured to:
determine a plurality of transmission opportunities, TXOPs, in which to attempt to transmit a paging signal in a plurality of beams, wherein the plurality of beams have a beam order;
assign a predetermined number of the plurality of TXOPs to each beam of the plurality of beams, wherein none of the TXOPs is assigned to more than one beam beam and wherein the predetermined number is greater than one;
perform at least one clear channel assessment, CCA, before transmitting the paging signal in one of the TXOPs; and
upon successful CCA, transmit the paging signal in a first beam of the plurality of beams using a first TXOP of the plurality of TXOPs assigned to the first beam, and
upon a failed CCA, perform a second CCA and transmit the paging signal in a second beam of the plurality of beams using a first TXOP of the plurality of TXOPs assigned to the second beam, the second beam being after the first beam in the beam order, and transmitting the first beam of the plurality of beams using a second TXOP of the plurality of TXOPs assigned to the first beam based on a successful second CCA, wherein the first TXOP of the plurality of TXOPs assigned to the second beam occurs after the first TXOP assigned to the first beam and before the second TXOP assigned to the first beam, the second TXOP assigned to the first beam occurring later in time than the first TXOP assigned to the first beam.
12. The network node of claim 11 , wherein assigning a predetermined number of the plurality of TXOPs to each beam of the plurality of beams comprises:
assigning at least a first sequence of TXOPs of the plurality of TXOPs to the plurality of beams in same order as the beam order.
13. The network node of claim 12 , wherein the network node is further configured to:
perform a first CCA, the first CCA covering each TXOP in the first sequence of TXOPs, wherein the first CCA is either successful or unsuccessful;
in response to the first CCA being successful, transmit the paging signal on each of the plurality of beams using each of the first sequence of TXOPs; and
in response to the first CCA being unsuccessful, abstain from transmitting the paging signal on any of the plurality of beams using any of the first sequence of TXOPs.
14. The network node of claim 12 , wherein the network node is further configured to:
perform a first CCA after at least one TXOP of the first sequence of TXOPs has passed, wherein the first CCA covers each remaining TXOP in the first sequence of TXOPs; and
in response to the first CCA being successful, transmit the paging signal at least on each of a plurality of remaining beams using each of the remaining TXOPs in the first sequence of TXOPs, wherein the plurality of remaining beams are beams of the plurality of beams to which the remaining TXOPs in the first sequence of TXOPs have been assigned.
15. The network node of claim 12 , wherein assigning a predetermined number of the plurality of TXOPs to each beam of the plurality of beams further comprises:
assigning a second sequence of TXOPs of the plurality of TXOPs to the plurality of beams in the same order as the beam order, wherein the first TXOP of the second sequence of TXOPs corresponds to the TXOP in the plurality of TXOPs that follows directly after the last TXOP of the first sequence of TXOPs.
16. The network node of claim 15 , wherein the network node is further configured to:
perform a first CCA after at least one TXOP of the first sequence of TXOPs has passed, wherein the first CCA covers each remaining TXOP in the first sequence of TXOPs and at least one TXOP of the second sequence of TXOPs; and
in response to the first CCA being successful, transmit the paging signal at least on:
each of a plurality of remaining beams using each of the remaining TXOPs in the first sequence of TXOPs, wherein the plurality of remaining beams are beams of the plurality of beams to which the remaining TXOPs in the first sequence of TXOPs have been assigned; and
the at least one TXOP of the second sequence of TXOPs.
17. The network node of claim 16 , wherein the at least one TXOP of the second sequence of TXOPs contains a number of sequential TXOP(s) equal to the number of beams in the plurality of beams that were not transmitted in the TXOPs of the first sequence of TXOPs.
18. The network node of claim 11 , wherein the network node is further configured to attempt to transmit on all TXOPs of the plurality of TXOPs assigned to the first beam regardless of a previous success of transmitting the paging signal on the first beam in a previous TXOP assigned to the first beam.
19. The network node of claim 11 , wherein the network node is further configured to use one of the plurality of TXOPs to transmit a signal other than the paging signal.
20. The network node of claim 11 , wherein the network node is further configured to map a plurality of synchronization signal block beams to the plurality of beams used for the paging signal, wherein the number of synchronization signal block beams is greater than the number of the plurality of beams used for the paging signal.
21. A method for use in a wireless device in wireless communications network, the method comprising:
obtaining an indication of a plurality of monitoring occasions in which a network node may attempt to transmit a paging signal in a plurality of beams, wherein the plurality of beams have a beam order and wherein a predetermined number of the plurality of monitoring occasions are assigned to each beam of the plurality of beams and wherein none of the monitoring occasions are assigned to more than one beam, the predetermined number is greater than one;
monitoring at least a subset of monitoring occasions of the plurality of monitoring occasions for the paging signal wherein the monitored occasions are associated with a first beam of the plurality of beams; and
receiving the paging signal in the first beam of the plurality of beams using one or more of the monitoring occasions being monitored by the wireless device, wherein:
upon successfully receiving the paging signal in the first beam, refraining from monitoring any subsequent monitoring occasions of the predetermined number of monitoring occasions associated with the first beam; and
upon failing to receive the paging signal in the first beam, additionally monitoring at least a subset of monitoring occasions associated with a second beam of the plurality of beams, the second beam being after the first beam in the beam order, and wherein a first monitoring occasion associated with the second beam occurs after a first monitoring occasion associated with the first beam and before any of the subsequent monitoring occasions associated with the first beam.
22. The method of claim 21 , wherein the plurality of monitoring occasions are divided equally into subsets where each of the subsets is associated with a different one of the plurality of beams and each of the subsets is defined to include the monitoring occasions assigned to the beam associated with the subset which are defined to include the (X*S+K)th monitoring occasions, where S is the total number of beams in the plurality of beams and K is the number of the beam in the plurality of beams which is associated with the subset and the subset comprises one monitoring occasion for each value of X for X equal to zero and each integer value between zero and the predetermined number minus one.
23. The method of claim 21 , wherein the beam order follows an index based on an effective synchronization signal block index or synchronization signal block QCL index.
24. The method of claim 21 , further comprising receiving the paging signal in the first beam using more than one of the monitoring occasions being monitored by the wireless device.
25. The method of claim 21 , further comprising determining the at least a subset of monitoring occasions to monitor based on a previously received subset of synchronization signal block transmissions or a previously received subset of synchronization signal transmissions.
26. A wireless device in a wireless communications network, the wireless device comprising:
a memory configured to store instructions; and
processing circuitry configured to execute the instructions, whereby the wireless device is configured to:
obtain an indication of a plurality of monitoring occasions in which a network node may attempt to transmit a paging signal in a plurality of beams, wherein the plurality of beams have a beam order and wherein a predetermined number of the plurality of monitoring occasions are assigned to each beam of the plurality of beams and wherein none of the monitoring occasions are assigned to more than one beam;
monitor at least a subset of monitoring occasions of the plurality of monitoring occasions for the paging signal wherein the monitored occasions are associated with a first beam of the plurality of beams; and
receive the paging signal in the first beam of the plurality of beams using one or more of the monitoring occasions being monitored by the wireless device, wherein:
upon successfully receiving the paging signal in the first beam, refraining from monitoring any subsequent monitoring occasions of the predetermined number of monitoring occasions associated with the first beam; and
upon failing to receive the paging signal in the first beam, additionally monitoring at least a subset of monitoring occasions associated with a second beam of the plurality of beams, the second beam being after the first beam in the beam order, and wherein a first monitoring occasion associated with the second beam occurs after a first monitoring occasion associated with the first beam and before any of the subsequent monitoring occasions associated with the first beam.
27. The wireless device of claim 26 , wherein the plurality of monitoring occasions are divided equally into subsets where each of the subsets is associated with a different one of the plurality of beams and each of the subsets is defined to include the monitoring occasions assigned to the beam associated with the subset which are defined to include the (X*S+K)th monitoring occasions, where S is the total number of beams in the plurality of beams and K is the number of the beam in the plurality of beams which is associated with the subset and the subset comprises one monitoring occasion for each value of X for X equal to zero and each integer value between zero and the predetermined number minus one.
28. The wireless device of claim 26 , wherein the beam order follows an index based on an effective synchronization signal block index or synchronization signal block QCL index.
29. The wireless device of claim 26 , wherein the wireless device is further configured to receive the paging signal in the first beam using more than one of the monitoring occasions that the wireless device is configured to monitor.
30. The wireless device of claim 26 , wherein the wireless device is further configured to determine the at least a subset of monitoring occasions to monitor based on a previously received subset of synchronization signal block transmissions or a previously received subset of synchronization signal transmissions.