Systems and methods for handover of a high power wireless device operating in a wireless network
Systems and methods are described for extending coverage of a wireless device. A plurality of wireless devices located in a coverage area of a first access node can be monitored for a first condition. At least one wireless device of the plurality of wireless devices that meets the first condition can be classified as a high power wireless device. Two or more indicators reported by the at least one wireless device are compared to a criteria. When the two or more indicators meet the criteria, a handoff of the at least one wireless device from the first access node to a second access node can be performed.
1. A method for handoff of a wireless device, the method comprising:
receiving, at a first access node, power reports from multiple wireless devices operating in a coverage area of the first access node, each power report including a current transmit power state of a respective wireless device that is determined based on a maximum allowable transmit power and a number of wireless resources allocated to the respective wireless device;
grouping, at the first access node, the multiple wireless devices into a first and second power classes based on current transmit power states included the received power reports, the first power class having a higher maximum allowable transmit power relative to the second power class;
instructing, by the first access node, the wireless devices of the first power class to report first and second signal indicators, the first signal indicator relating to a signal quality and the second signal indicator relating to a signal strength;
comparing, at the first access node, the reported first signal indicator to a first signal metric;
comparing, at the first access node, the reported second signal indicator to a second signal metric; and
when the first and second signal indicators concurrently meet the first and second signal metrics, respectively, performing a handoff of the wireless devices of the first power class to a second access node.
2. The method of claim 1 , wherein the wireless devices of the first class are high power wireless devices, and the wireless devices of the second class are low power wireless devices.
3. The method of claim 1 , wherein the first signal indicator is a Reference Signal Receive Quality (RSRQ) indicator and the second signal indicator is a Reference Signal Received Power (RSRP).
4. The method of claim 3 , wherein the first signal metric is a preset RSRQ value and the second signal metric is a preset RSRP value.
5. The method of claim 4 , wherein the first and second signal metrics are preset based on the first power class of the wireless devices.
6. The method of claim 1 , wherein the power reports are power headroom (PHR) and/or enhanced PHR (ePHR) reports.
7. The method of claim 1 , wherein the current transmit power state of a respective wireless device is further determined based on a target received power, a pathloss compensation factor, and a pathloss.