Code allocation based on cross code correlation
AssigneeInterDigital Technology Corporation
InventorsAriela Zeira, Eldad Zeira
Life of this patent
Estimating the term…
Abstract
The invention includes various approaches to assigning codes in wireless code division multiple access communication systems. The invention estimates the cross code correlation between codes to base the code assignment. One approach assigns codes having a high cross correlation to users having a low transmission power level. Another approach assigns code groups having a high cross correlation to a same coded composite transport channel. Another approach assigns codes using a cross correlation factor of each code to minimize a system noise rise. Another approach uses transmission or reception diversity to assign bad code groups to users having a different diversity relationship. Another approach uses a diversity factor and a cross code correlation factor to assign codes.
Claims59
A method for assigning codes to communications in a wireless code division multiple access communication system, the method comprising:
- providing codes for potential assignment;
- evaluating the provided codes to determine codes having a high cross code correlation;
- determining users of the system having a low transmission power level;
- and
- assigning the provided codes so that the provided codes having a high cross code correlation are preferably assigned to the users having a low transmission power level and the provided codes having a low cross code correlation are preferably assigned to the users having a high transmission power level.
A wireless code division multiple access radio network controller (RNC) comprising:
- means for evaluating provided codes for potential assignment to determine codes having a high cross code correlation;
- means for determining users having a low transmission power level;
- and
- means for assigning the provided codes so that the provided codes having a high cross code correlation are preferably assigned to the users having a low transmission power level and the provided codes having a low cross code correlation are preferably assigned to the users having a high transmission power level.
A wireless code division multiple access radio network controller (RNC) comprising:
- a code assignment device for evaluating provided codes for potential assignment to determine codes having a high cross code correlation;
- for determining users having a low transmission power level;
- and for assigning the provided codes so that the provided codes having a high cross code correlation are preferably assigned to the users having a low transmission power level and the provided codes having a low cross code correlation are preferably assigned to the users having a high transmission power level.
A wireless code division multiple access user equipment (UE) comprising:
- an assigned codes determination device for determining codes assigned to support communications of the UE, the code assignment determined by evaluating provided codes for potential assignment to determine codes having a high cross code correlation;
- determining users having a low transmission power level;
- and assigning the provided codes so that the provided codes having a high cross code correlation are preferably assigned to the users having a low transmission power level and the provided codes having a low cross code correlation are preferably assigned to the users having a high transmission power level.
A method for assigning codes to communications in a wireless code division multiple access communication system, the method comprising:
- providing codes for potential assignment;
- evaluating the provided codes to determine bad groups of codes having a high cross code correlation;
- and
- assigning the provided codes so that the provided codes in bad groups are preferably assigned to transmissions having a substantially similar transmission power level.
A wireless code division multiple access radio network controller (RNC) comprising:
- means for evaluating provided codes for potential assignment to determine bad groups of codes having a high cross code correlation;
- and
- means for assigning the provided codes so that the provided codes in bad groups are preferably assigned to transmissions having a substantially similar transmission power level.
A wireless code division multiple access radio network controller (RNC) comprising:
- a code assignment device for evaluating provided codes for potential assignment to determine bad groups of codes having a high cross code correlation;
- and for assigning the provided codes so that the provided codes in bad groups are preferably assigned to transmissions having a substantially similar transmission power level.
A wireless code division multiple access user equipment (UE) comprising:
- an assigned codes determination device for determining codes assigned to support communications of the UE, the code assignment determined by evaluating provided codes for potential assignment to determine bad groups of codes having a high cross code correlation and assigning the provided codes so that the provided codes in bad groups are preferably assigned to transmissions having a substantially similar transmission power level.
A method for assigning codes to communications in a wireless code division multiple access communication system, the method comprising:
- providing codes for potential assignment;
- evaluating provided codes for potential assignment to determine bad groups of codes having a high cross code correlation;
- and
- assigning the provided codes to coded composite transport channels (CCTrCHs), so that the provided codes of one of the bad code groups are preferably assigned to a same CCTrCH.
A wireless code division multiple access radio network controller (RNC) comprising:
- means for evaluating provided codes for potential assignment to determine bad groups of codes having a high cross code correlation;
- and
- means for assigning the provided codes to coded composite transport channels (CCTrCHs), so that the provided codes of one of the bad code groups are preferably assigned to a same CCTrCH.
A wireless code division multiple access radio network controller (RNC) comprising:
- a code assignment device for evaluating provided codes for potential assignment to determine bad groups of codes having a high cross code correlation;
- and for assigning the provided codes to coded composite transport channels (CCTrCHs), so that the provided codes of one of the bad code groups are preferably assigned to a same CCTrCH.
A wireless code division multiple access user equipment comprising:
- an assigned codes determination device for determining codes assigned to support communication of the UE, the code assignment determined by evaluating provided codes for potential assignment to determine bad groups of codes having a high cross code correlation;
- and assigning the provided codes to coded composite transport channels (CCTrCHs), so that the provided codes of one of the bad code groups are preferably assigned to a same CCTrCH.
A method for assigning codes to communications in a wireless code division multiple access communication system, the method comprising:
- providing codes for potential assignment;
- determining a cross correlation factor for each potential code, the cross correlation factor indicating a cross code correlation between that potential code and other codes;
- for each potential code, calculating a noise change to the system using the cross correlation factor;
- and
- selecting a code of the potential codes for assignment having a minimum noise change.
A wireless code division multiple access radio network controller (RNC) comprising:
- means for determining a cross correlation factor for each potential code for potential assignment, the cross correlation factor indicating a cross code correlation between that potential code and other codes;
- means for each potential code, for calculating a noise change using the cross correlation factor;
- and
- means for selecting a code of the potential codes for assignment having a minimum noise change.
A wireless code division multiple access radio network controller (RNC) comprising:
- a code assignment device for determining a cross correlation factor for each potential code for potential assignment, the cross correlation factor indicating a cross code correlation between that potential code and other codes;
- for each potential code, for calculating a noise change using the cross correlation factor;
- and for selecting a code of the potential codes for assignment having a minimum noise change.
A wireless code division multiple access user equipment (UE) comprising:
- an assigned codes determination device determining codes assigned to support communications of the UE, the code assignment determined by determining a cross correlation factor for each potential code for potential assignment, the cross correlation factor indicating a cross code correlation between that potential code and other codes;
- for each potential code, calculating a noise change using the cross correlation factor;
- and selecting a code of the potential codes for assignment having a minimum noise change.
Dependencies are inferred from the claim text.