Radio base station device and radio communication method
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorKazuyuki Miya
Life of this patent
Estimating the term…
Abstract
Direction of arrival estimation sections 106a and 106b estimate directions of arrival for communication terminals. Grouping decision section 107 divides the communication terminals that belong to a sector into a plurality of groups based on the results of direction of arrival estimations. Scramble code assignment control section 114 performs assignment control in such a way that a same scramble code is assigned to channels with similar (not necessarily completely the same) directivities.
Claims19
A radio base station apparatus comprising:
- direction of arrival estimating means for estimating directions of arrival of reception signals from communication terminals;
- dividing means for dividing said communication terminals into groups based on said directions of arrival;
- scramble code assignment controlling means for assigning scramble codes differing from one said group to another;
- and
- transmitting means for performing transmission with directivity of transmission signals modulated using the assigned scramble codes to said communication terminals.
A communication terminal apparatus that carries out radio communication with a radio base station apparatus, said radio base station apparatus comprising:
- direction of arrival estimating means for estimating directions of arrival of reception signals from communication terminals;
- dividing means for dividing said communication terminals into groups based on said directions of arrival;
- scramble code assignment controlling means for assigning scramble codes differing from one said group to another;
- and
- transmitting means for performing transmission with directivity of transmission signals modulated using the assigned scramble codes to said communication terminals.
A radio communication method comprising:
- a direction of arrival estimating step of estimating directions of arrival of reception signals from communication terminals;
- a dividing step of dividing said communication terminals into groups based on said directions of arrival;
- a scramble code assignment controlling step of assigning scramble codes differing from one said group to another;
- and
- a transmitting step of performing transmission with directivity of transmission signals modulated using the assigned scramble codes to said communication terminals.
Dependencies are inferred from the claim text.