Patent ID: 9544859
Date: 2017-01-10
CPC Classifications: H04L,H04W

Claim:
1. A method for communicating with a communications device from an infrastructure equipment forming part of a wireless communications network, the method comprising: transmitting data to communications devices via a wireless access interface, the wireless access interface providing a plurality of communications resource elements across a system bandwidth, which are divided in time into a plurality of time divided radio frames, providing, within the system bandwidth, a first section of communications resource elements within a first frequency bandwidth for allocation preferably to reduced capability communications devices to receive signals representing the data transmitted by the infrastructure equipment within the first frequency bandwidth forming a virtual carrier, the reduced capability communications devices each having a receiver bandwidth which is greater than or equal to the first frequency bandwidth but less than the system bandwidth, wherein transmitting data to the communications resources includes transmitting data symbols on a first subset of the resource elements in one or more of the radio frames, and transmitting common reference symbols on a second subset of the resource elements in each radio frame at a first transmission power; and wherein the data symbols in said virtual carrier are transmitted on the first subset of resource elements at a second transmission power; and the method further comprises determining a difference in transmission power between the second transmission power and the first transmission power, and if the difference in transmission power substantially exceeds a set threshold, generating specific reference symbols and inserting said specific reference symbols within the virtual carrier in place of one or more of the data symbols, said specific reference symbols having a third transmission power, the third transmission power being greater than the first transmission power.