Abstract
A method and apparatus are disclosed for optimizing a random access channel (RACH) transmission from a wireless transmit / receive unit (WTRU) for multiple transmissions. The WTRU may initiate uplink transmission for the random access procedure using the configured time resource so that the uplink resource can be time shared by the plurality of WTRUs. The transmission time can be calculated on an absolute or relative basis. A backoff time may be applied before starting uplink transmission. The backoff time may be unique to the WTRU, unique to the WTRU group, or may be specified according to an access class, and may be determined based on priority. Scaling factor can be applied to the backoff time. Non-competitive allocation methods can be used to determine appropriate resources. Data may be sent with and without the preamble. The WTRU may comprise a machine type communication (MTC) device and may be grouped according to a number of factors or characteristics.
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| Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
| 4G,3G,2G | 30/12/2019 | ISLD-201912-087 | INTERDIGITAL INC | Yes | Family Member | ||||
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SUMMARY
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