METHOD AND DEVICE FOR INTERFACING IN A MOBILE COMMUNICATION SYSTEM

摘要

Interfacing according to a common public radio interface in a base station in a mobile communication system is described. The interfacing comprises a conversion process for rate-converting legacy data samples. First a predetermined number of the legacy data samples is converted to frequency samples in a frequency domain, then the frequency samples are zero padded to extend the frequency range according to a related sample rate of a 4G data format and then converted into a number of data samples of the related sample rate. The related sample rate is a multiplication of S/K times a basic frame rate of the 4G data format, S samples being allocated to K frames, K and S being integers and K being 8 or less. Advantageously large buffers for allocating a large number of legacy samples to 4G frames are avoided.

主权项

1. A method of interfacing a radio unit and a radio controller unit in a base station in a mobile communication system, one of the units having a common public radio interface according to a first version of a common public radio interface standard, and the other unit having a common public radio interface according to a second version of a common public radio interface standard, both the first and second version supporting a 4G data format for transferring data samples for communicating via a fourth generation system for mobile communication, the second version further providing a data format for transferring legacy data samples for communicating via a legacy system for mobile communication of a generation before the fourth generation, which data format is not provided by the first version,
the method comprising:
converting a predetermined number of the legacy data samples to be transmitted to frequency samples in a frequency domain;zero padding the frequency samples to extend the frequency range according to a related sample rate of the 4G data format; andreconverting the frequency samples into a number of data samples of the related sample rate, wherein the related sample rate is a multiplication of S/K times a basic frame rate of the 4G data format, S samples are allocated to K frames, and K and S being integers and K being 8 or less.