In-Network Performance of Handheld Mobile Terminals

Abstract

Udgivelsesdato: MAYThis paper considers realistic evaluation of the power mobile handsets are able to transmit and receive. It has been suggested to use the so-called total radiated power (TRP) and the total isotropic sensitivity (TIS) for the up-link and down-link, respectively, which may be seen as special cases of the general mean effective gain (MEG) measure. These measures are computed from the spherical radiation pattern of the handset and the different measures are obtained by using different models of the mobile propagation environment. In this work the results obtained via the spherical radiation patterns are compared with the equivalent performance obtained in a live GSM network using data from the Abis network interface. This method does not require altering of the handsets and the testing uses normal calls in the network. The investigation is based on measurements with four different commercially available handsets carried out in two different indoor environments and involving 22 test users. In addition a series of measurements were also made with a phantom simulating the handset user, allowing a test of how well the phantom represents the average user