Compared with the traditional analog trunked ra-dio, TETRA is more spectrum efficient and can provide extensive services.

与传统的模拟集群移动通信系统相比，TETRA具有更高的频谱利用率，提供更广泛的业务服务。

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To cope with the data tsunami Ofcom has drawn up plans to release more radio spectrum and make the industry's use of existing spectrum more efficient.

BBC: Data jam threat to UK mobile networks

Reallocation of spectrum will maximize the efficient use of the nation's spectrum resources.

WSJ: Should Some of Broadcasters' Spectrum Be Auctioned Off to Wireless Carriers?

Other U.S. carriers have been forced to leverage less efficient spectrum for their network upgrades.

FORBES: Verizon To Up 4G Battle With 'Fastest, Most Advanced' Network Launch On Dec. 5