Patent ID: 8929195
Filing Date: 2015-01-06
Classification: H04B,H04J

Abstract:
1. A method of increasing forward channel capacity in a CDMA communication system comprising: configuring directional antennas in a cell sector to provide multiple beam zones in the cell sector, wherein the multiple beam zones include at least a first beam zone, a second beam zone, and at least two intervening beam zones between the first beam zone and the second beam zone, wherein the at least two intervening beam zones include a third beam zone that overlaps with at least a portion of the first beam zone, and wherein the at least two intervening beam zones include a fourth beam zone that overlaps with at least a portion of the second beam zone; assigning orthogonal channel codes of a set of orthogonal channel codes to a plurality of channel code groups, wherein the orthogonal channel codes are useable by mobile stations operating within the cell sector, and wherein the plurality of channel code groups includes at least (i) a first code group including a first plurality of orthogonal channel codes of the set of orthogonal channel codes, (ii) a second code group including a second plurality of channel codes of the set of orthogonal channel codes, and (iii) a third code group including a third plurality of channel codes of the set of orthogonal channel codes, wherein the channel codes of the first code group are distinct from the channel codes of the second code group and the third code group, and wherein the channel codes of the second code group are distinct from the channel codes of the third code group; assigning the first code group to the first beam zone and to the second beam zone such that the channel codes of the first code group are useable within the first beam zone and the second beam zone, assigning the second code group to the third beam zone such that the channel codes of the second code group are useable within the third beam zone, and assigning the third code group to the fourth beam zone such that the channel codes of the third code group are useable within the fourth beam zone, and while a given channel code of the first code group is in use by a first mobile station within the first beam zone, assigning the given channel code to a second mobile station within the second beam zone so that the given channel code is simultaneously in use by the first base station in the first beam zone and by the second mobile station in the second beam zone.