1. A data transmission method of a base station in a coordinated multi-cell wireless communication system, the data transmission method comprising:
receiving information about beam-forming vectors, aligned with a channel to a user equipment placed in a neighbor cell, and about nulling beam-forming vectors for the channel to the user equipment from the neighbor cell;
determining a transmission beam-forming vector based on the information; and
transmitting the data to the user equipment using the transmission beam-forming vector.
2. The data transmission method of claim 1, wherein the channel is an effective channel in which a reception beam-forming vector of the user equipment has been taken into consideration.
3. The data transmission method of claim 1, wherein the transmission beam-forming vector is selected from the beam-forming vectors orthogonal to the beam-forming vectors aligned with the channel to the user equipment placed in the neighbor cell.
4. The data transmission method of claim 1, wherein the transmission beam-forming vector is determined using Zero Forcing (ZF) beam-forming.
5. The data transmission method of claim 1, wherein the data are received from the neighbor cell, and the data comprise data for the user equipment placed in the neighbor cell.
6. The data transmission method of claim 1, wherein the information about the beam-forming vectors is transmitted by a base station of the neighbor cell or by the user equipment placed in the neighbor cell.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An electrolyte, comprising:
an electrolytic solution consisting of at least one selected from the group consisting of vinylethylene carbonate and its derivatives in the range of 0.05 wt % to 5 wt % in total; and
a polymer,
wherein,
said polymer is gelatinized with said electrolytic solution, and said electrolytic solution is diffused or held within said polymer,
said electrolytic solution consists of 95 wt % or more of a combination of ethylene carbonate and propylene carbonate to percentage complement the at least one selected from the group consisting of vinylethylene carbonate and its derivatives, and
said polymer contains any one from the group consisting of polyethylene oxide, polypropylene oxide, and poly methacrylic nitrile as a monomer unit.
2. An electrolyte according to claim 1, wherein a mass ratio of ethylene carbonate to propylene carbonate ranges from about 1585 to about 7525.
3. A battery comprising:
a cathode;
an anode; and
an electrolyte,
wherein,
the electrolyte contains an electrolytic solution consisting of at least one from the group consisting of vinylethylene carbonate and its derivatives in the range of 0.05 wt % to 5 wt % in total, and a polymer,
said polymer is gelatinized with said electrolytic solution, and said electrolytic solution is diffused or held within said polymer,
said electrolytic solution consists of 95 wt % or more of a combination of ethylene carbonate and propylene carbonate to percentage complement the at least one selected from the group consisting of vinylethylene carbonate and its derivatives, and
said polymer contains any one from the group consisting of polyethylene oxide, polypropylene oxide, and poly methacrylic nitrile as a monomer unit.
4. A battery according to claim 3, wherein the electrolytic solution contains ethylene carbonate and propylene carbonate with a mass ratio of ethylene carbonate to propylene carbonate ranging from about 1585 to about 7525.