Wireless system, transmission apparatus and transmission method
AssigneeNTT, Inc.
InventorsHideki TOSHINAGA, Daisei UCHIDA, Yasuyoshi YAMAMOTO, Yuta TAKAHASHI, Yushi SHIRATO, Takuto ARAI, Naoki KITA
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Abstract
A wireless system includes a plurality of distributedly arranged antennas and a wireless base station. The plurality of antennas and the wireless base station are connected using radio-over-fiber (RoF). The plurality of antennas are divided into a plurality of groups, and the wireless system transmits or receives radio wave by the antennas at different timings for each group.
Claims8
A wireless system which connects a plurality of distributedly arranged antennas and a wireless base station using radio-over-fiber (RoF), wherein
- the plurality of antennas are divided into a plurality of groups, and
- a radio wave is transmitted or received by each of the plurality of antennas at timings different from each other for each of the plurality of groups.
A transmission apparatus comprising:
- a plurality of converters, which are corresponding to the a plurality of distributedly arranged antennas, respectively, each performing one or both of (i) processing of converting an optical signal representing a received signal having been received by a corresponding antenna which is one of the plurality of the antennas by a radio wave into an electrical signal and (ii) processing of converting a an electrical signal to be transmitted from the corresponding antenna by a radio wave into an optical signal, the plurality of antennas being divided into a plurality of groups;
- and
- a switch performing one or both of (i) processing of outputting, to a wireless base station, the electrical signal having been converted by the each of the plurality of converters corresponding to each of the plurality of antennas belonging to a first one of the plurality of groups at timings different from each other for each of the plurality of groups, and (ii) processing of receiving, from the wireless base station, the electrical signal to be transmitted from each of the plurality of antennas and outputting the received signal to each of the plurality of converters corresponding to each of the plurality of antennas belonging to a second one of the plurality of groups.
A transmission method executed by a wireless system in which a plurality of distributedly arranged antennas and a wireless base station are connected using radio-over-fiber (RoF), wherein
- the plurality of antennas are divided into a plurality of groups, the method comprising:
- transmitting and receiving, by the wireless system, a radio wave by each of the plurality of antennas at timings different from each other for each of the groups.
Dependencies are inferred from the claim text.