Abstract
A method and apparatus for a wireless transmit receive unit (WTRU) to use a contention-based uplink communications channel applies a rule-based restriction of access to the contention-based uplink channel that attempts to use at least one contention-free uplink channel allocation for uplink transmissions on a condition that at least one contention-free uplink channel allocation has been granted.
A method and apparatus for a wireless transmit receive unit (WTRU) to use a contention-based uplink communications channel applies a rule-based restriction of access to the contention-based uplink channel that attempts to use at least one contention-free uplink channel allocation for uplink transmissions on a condition that at least one contention-free uplink channel allocation has been granted.
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4G | 21/12/2016 | ISLD-201706-015 | INTERDIGITAL INC | No | Family Member | ||||
5G | 07/11/2019 | ISLD-201910-015 | INTERDIGITAL INC |
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Specification Information
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Technologies

Product
Use Cases

Services
Claim
1. A method implemented by a wireless transmit receive unit (WTRU) accessing a contention-based (CB) uplink communication channel, the method comprising:', 'applying a rule-based restriction of access to the CB uplink channel that attempts to use at least one contention-free uplink channel allocation for uplink transmissions on a condition that at least one contention-free uplink channel allocation has been granted.
2. The method as in claim 1, wherein the rule-based restriction is based on a number of sub-frames since a scheduling request for a contention-free channel was transmitted.
3. The method as in claim 1, wherein the rule-based restriction is based on a number of sub-frames since a successful transmission of a buffer status report (BSR).
4. The method as in claim 1, wherein the rule-based restriction is based on transmission of an uplink shared channel within a set number of frames.
5. The method as in claim 1, further comprising the WTRU monitoring statistics of uplink contention-based resource usage and uplink contention-free resource usage, where based on the monitoring, the WTRU determines whether to use the CB uplink channel or determines a probability of access to the CB uplink channel.
6. The method as in claim 1, further comprising the WTRU transmitting data on the CB uplink channel; and cancelling a triggered BSR.
7. The method as in claim 1, wherein the WTRU has a pending scheduling request SR, further comprising receiving a valid CB uplink grant; transmitting on a CB uplink channel; and cancelling a random access channel (RACH) preamble transmission in the same sub-frame.
8. The method as in claim 1, wherein the WTRU has a pending scheduling request SR, further comprising receiving a valid CB uplink grant; transmitting a RACH preamble; and prohibiting transmission on the CB uplink channel in the same sub-frame.
9. The method as in claim 1, further comprising receiving more than one uplink grant for a sub-frame; wherein the WTRU does not transmit on the CB uplink channel on condition that at least one contention-free grant is received for a cell radio network temporary identifier (C-RNTI) or a temporary C-RNTI of the WTRU
10. The method as in claim 1, further comprising receiving more than one uplink grant for a sub-frame; wherein the WTRU does not transmit on the CB uplink channel on condition that at least one uplink grant is received in a random access response.', "11. The method as in claim 1, further comprising receiving more than one uplink grant for a sub-frame; wherein the WTRU does not transmit on the CB uplink channel on condition that at least one uplink grant is received to initialize semi-persistent scheduling (SPS) on a contention-free uplink channel for the WTRU's SPS cell radio network temporary identifier (C-RNTI)."12. The method as in claim 1, further comprising receiving more than one uplink grant for a sub-frame; wherein the WTRU does not transmit on the CB uplink channel on condition that the WTRU is to perform a non-adaptive retransmission in the sub-frame in response to receiving a NACK
13. A method implemented in a wireless transmit receive unit (WTRU), comprising:', 'determining size of allocated contention-based (CB) uplink resources granted by a communication network; and', 'setting a length of a demodulation reference signal in frequency domain to match the size of the allocated CB uplink resource
14. A wireless transmit receive unit (WTRU), comprising a processor configured to access a contention-based (CB) uplink communication channel, and applying a rule-based restriction of access to the CB uplink channel that attempts to use at least one contention-free uplink channel allocation for uplink transmissions on a condition that at least on contention-free uplink channel allocation has been granted
15. The WTRU as in claim 14, wherein the rule-based restriction is based on a number of sub-frames since a scheduling request was transmitted
16. The WTRU as in claim 14, wherein the rule-based restriction is based on a number of sub-frames since a successful transmission of a buffer status report (BSR)
17. The WTRU as in claim 14, wherein the rule-based restriction is based on transmission of an uplink shared channel within a set number of frames
18. The WTRU as in claim 14, wherein the processor is further configured to monitor statistics of uplink contention-based resource usage and uplink contention-free resources usage, where based on the monitoring, the processor determines whether to use the CB uplink channel or determines a probability of access to the CB uplink channel
19. The WTRU as in claim 14, wherein the processor is further configured to transmit data on the CB uplink channel; and cancel a triggered BSR.
20. The WTRU as in claim 14, wherein the processor has a pending scheduling request SR, the processor further configured to receive a valid CB uplink grant; transmit on a CB uplink channel; and cancel a random access channel (RACH) preamble transmission in the same sub-frame.
21. The WTRU as in claim 14, wherein the processor has a pending scheduling request SR, the processor further configured to receive a valid CB uplink grant; transmit a RACH preamble; and prohibit transmission on the CB uplink channel in the same sub-frame.
22. The WTRU as in claim 14, wherein the processor is further configured to receive more than one uplink grant for a sub-frame; and the processor decides not to transmit on the CB uplink channel on condition that at least one contention-free grant is received for a cell radio network temporary identifier (C-RNTI) or a temporary C-RNTI of the WTRU.
23. The WTRU as in claim 14, wherein the processor is further configured to receive more than one uplink grant for a sub-frame; and the processor decides not to transmit on the CB uplink channel on condition that at least one uplink grant is received in a random access response.', "24. The WTRU as in claim 14, wherein the processor is further configured to receive more than one uplink grant for a sub-frame; and the processor decides not to transmit on the CB uplink channel on condition that at least one uplink grant is received to initialize semi-persistent scheduling (SPS) on a contention-free uplink channel for the WTRU's SPS cell radio network temporary identifier (C-RNTI).", '25. The WTRU as in claim 14, wherein the processor is further configured to receive more than one uplink grant for a sub-frame; and the processor decides not to transmit on the CB uplink channel on condition that the WTRU is to perform a non-adaptive retransmission in the sub-frame in response to receiving a NACK.
26. A wireless transmit receive unit (WTRU), comprising a processor configured to determine size of allocated contention-based (CB) uplink resources granted by a communication network; and to set a length of a demodulation reference signal in frequency domain to match the size of the allocated CB uplink resource.']
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