Abstract
In an integrated access and backhaul (IAB) system, an access WTRU may receive a random access channel (RACH) occasion (RO) configuration comprising one or more RO resources from a first integrated access backhaul (IAB) node. The access WTRU may receive an indication that one or more of the configured RO resources have an overlap with one or more IAB node RO resources. The access WTRU may monitor and receive the ROI indicating the configured RO resources that overlap with the one or more IAB node RO resources. Based on the received ROI and the configured RO resources, the access WTRU may determine one or more RO resources available for PRACH transmission. The access WTRU may select an RO resource from the available RO resources for PRACH transmission. The access WTRU may send a first PRACH transmission to the first IAB node using the selected RO resource.
Technologies
Resource configuration
Product
Use Cases
Wireless communication
Services
Claim
1. A wireless transmit/receive unit (WTRU) comprising a processor configured to at least:
receive, from a first integrated access backhaul (IAB) node, a random access channel (RACH) occasion (RO) configuration comprising one or more RO resources; receive from the first IAB node an indication that one or more of the configured RO resources have an overlap with one or more IAB node RO resources; monitor an RO indicator (ROI) to determine the configured RO resources that overlap with the one or more IAB node RO resources; receive the ROI indicating the configured RO resources that overlap with the one or more IAB node RO resources; determine, based on the ROI and the configured RO resources, one or more RO resources available for a physical random access channel (PRACH) transmission; select an RO resource from the available RO resources for PRACH transmission; and send a first PRACH transmission to the first IAB node using the selected RO resource.
2. The WTRU of claim 1, wherein the processor is configured to receive a physical control channel (PDCCH) transmission comprising the ROI, wherein the ROI is received via downlink control information (DCI).
3. The WTRU of claim 1, wherein the WTRU receives the RO configuration via a radio resource control (RRC) signaling or via system information.
4. The WTRU of claim 1, wherein determining the RO resources available for PRACH transmission comprises determining the ROs that are used by the first IAB node and therefore not available and the ROs that are not used by the first IAB node and therefore available.
5. The WTRU of claim 1, wherein the first PRACH transmission comprises a preamble.
6. The WTRU of claim 1, wherein the processor is configured to:
determine a timing difference of channel time delay between a first channel associated with the first IAB node and a second channel associated with a second IAB node; determine timing advance (TA) value associated with the second IAB node, wherein the TA value is determined based on the timing difference of the channel time delay between the first channel and the second channel and the TA value associated with the first IAB node; determine a radio link failure or a beam failure has occurred with the first IAB node; and send a second PRACH transmission to the second IAB node using the determined TA value associated with the second IAB node.
7. The WTRU of claim 6, wherein the timing difference of the channel time delay between the first channel and the second channel is determined by comparing a first receive timing obtained from a first synchronization signal block (SSB) received from the first IAB node and a second receive timing obtained from a second SSB received from the second IAB node.
8. A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:
receiving, from a first integrated access backhaul (IAB) node, a random access channel (RACH) occasion (RO) configuration comprising one or more RO resources; receiving from the first IAB node an indication that one or more of the configured RO resources have an overlap with one or more IAB node RO resources; monitoring an RO indicator (ROI) to determine the configured RO resources that overlap with the one or more IAB node RO resources; receiving the ROI indicating the configured RO resources that overlap with the one or more IAB node RO resources; determining, based on the ROI and the configured RO resources, one or more RO resources available for a physical random access channel (PRACH) transmission; selecting an RO resource from the available RO resources for PRACH transmission; and sending a first PRACH transmission to the first IAB node using the selected RO resource.
9. The method of claim 8 further comprising receiving a physical control channel (PDCCH) transmission comprising the ROI, wherein the ROI is received via downlink control information (DCI).
10. The method of claim 8, wherein the WTRU receives the RO configuration via a radio resource control (RRC) signaling or via system information.
11. The method of claim 8, wherein determining the RO resources available for PRACH transmission comprises determining the ROs that are used by the first IAB node and therefore not available and the ROs that are not used by the first IAB node and therefore available.
12. The method of claim 8, wherein the first PRACH transmission comprises a preamble.
13. The method of claim 8 further comprising:
determining a timing difference of channel time delay between a first channel associated with the first IAB node and a second channel associated with a second IAB node;
determining timing advance (TA) value associated with the second IAB node, wherein the TA value is determined based on the timing difference of the channel time delay between the first channel and the second channel and the TA value associated with the first IAB node;
determining a radio link failure or a beam failure has occurred with the first IAB node; and
send a second PRACH transmission to the second IAB node using the determined TA value associated with the second IAB node.
14. The method of claim 13, wherein the timing difference of the channel time delay between the first channel and the second channel is determined by comparing a first receive timing obtained from a first synchronization signal block (SSB) received from the first IAB node and a second receive timing obtained from a second SSB received from the second IAB node.
Associated Portfolios
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Note:
The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.