Random access preamble selection

摘要

In systems and methods of random access preamble selection, a first plurality of random access preambles and a second plurality of random access preambles are stored at an access node. A random access channel request is received from a wireless device at the access node, the random access channel request comprising an application type of an application running on the wireless device, and a network load, a priority class of the wireless device, and a mobility of the wireless device are determined. When the first plurality of random access preambles is not exhausted, the network load meets a load criteria, the priority class of the wireless device meets a priority criteria, the mobility of the wireless device meets a mobility criteria, and the application type of the application meets an application criteria a random access preamble is assigned to the wireless device from the first plurality of random access preambles.

主权项

1. A method of random access preamble selection, comprising:
storing at an access node a first plurality of random access preambles and a second plurality of random access preambles; receiving a random access channel request from a wireless device at the access node, the random access channel request comprising an application type of an application running on the wireless device; determining a network load, a priority class of the wireless device, and a mobility of the wireless device; adjusting the first plurality of random access preambles and the second plurality of random access preambles based on the determined network load; assigning a random access preamble to the wireless device from the first plurality of random access preambles when the first plurality of random access preambles is not exhausted, the network load meets a load criteria, the priority class of the wireless device meets a priority criteria, the mobility of the wireless device meets a mobility criteria, and the application type of the application meets an application criteria; when the first plurality of random access preambles is exhausted, determining that a collision occurs between the random access channel request from the wireless device and a second random access channel request from a second wireless device; and instructing via application of a back off timer the second wireless device to delay re-sending the second random access channel request.