Method and apparatus for supporting downlink joint detection in tdd cdma systems
AssigneeKoninklijke Philips Electronics N.V.
InventorsYueheng Li, Li Sun, Gang Wu
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Abstract
A method is proposed for supporting downlink JD (joint detection) in a TDD CDMA communication network system, comprising steps of: judging whether the CAI (code allocation information) in a downlink timeslot will change in the next TTI (transmission time interval); if the CAI will change, inserting the changed CAI as a specific control information into a specified field in the traffic burst in the downlink timeslot corresponding to current TTI; sending the traffic burst containing the specific control information to each UE (user equipment) in the downlink timeslot via a downlink channel.
Claims24
A method for supporting downlink JD (joint detection) in a TDD CDMA communication network system, comprising:
- (a) judging whether the CAI (code allocation information) in a downlink timeslot will change in the next TTI (transmission time interval);
- (b) inserting the changed CAI as a specific control information into a specified field in the traffic burst in the downlink timeslot corresponding to current TTI if the CAI will change;
- (c) sending the traffic burst containing the specific control information to each UE (user equipment) in the downlink timeslot via a downlink channel.
A method for supporting downlink JD to be performed by a UE in a TDD CDMA communication system, comprising steps of:
- (i) receiving a traffic burst in a downlink timeslot transferred by the network system via downlink channel;
- (ii) detecting whether the traffic burst contains the CAI in the next TTI in the downlink timeslot;
- (iii) extracting the CAI if the traffic burst contains the CAI;
- (iv) performing next-phase JD algorithm to decrease interference by using the CAI.
A method for supporting downlink single-user JD in a TDD CDMA communication network system, comprising steps of:
- (a) judging whether the ACN (active code number) in a downlink timeslot will change in the next TTI;
- (b) inserting the changed ACN as a specific control information into a specified field in the traffic burst in downlink timeslot corresponding to current TTI if the ACN will change;
- (c) sending the traffic burst containing the specific control information to each UE in the downlink timeslot via downlink channel.
A method performed by a UE for supporting downlink single-user JD in a TDD CDMA communication system, comprising steps of:
- (i) receiving a traffic burst transferred by the network system via downlink channel in a downlink timeslot;
- (ii) detecting whether the traffic burst contains the ACN in the next TTI in the downlink timeslot;
- (iii) extracting the ACN if the traffic burst contains the ACN;
- (iv) performing the next-phase JD algorithm to decrease interference by using the ACN.
A network system for supporting downlink JD, comprising:
- a judging unit, for judging whether the CAI in a downlink timeslot will change in the next TTI;
- an inserting unit, for inserting the changed CAI as a specific control information into a specified field in the traffic burst in downlink timeslot corresponding to current TTI when the CAI changes;
- a sending unit, for sending the traffic burst containing the specific control information to each UE in the downlink timeslot via a downlink channel.
A UE for supporting downlink JD, comprising:
- a receiving unit, for receiving a traffic burst transferred by the network system via downlink channel in a downlink timeslot;
- a detecting unit, for detecting whether the traffic burst contains the CAI in the next TTI in the downlink timeslot;
- an extracting unit, for extracting the CAI when the traffic burst contains the CAI;
- a performing unit, for performing next-phase JD algorithm to decrease interference by using the CAI.
A network system for supporting downlink single-user JD, comprising:
- a judging unit, for judging whether the ACN in a downlink timeslot will change in the next TTI;
- an inserting unit, for inserting the changed ACN as a specific control information into a specified field in the traffic burst in the downlink timeslot corresponding to current TTI when the ACN changes;
- a sending unit, for sending the traffic burst containing the specific control information to each UE in the downlink timeslot via downlink channel.
A UE for supporting downlink single-user JD, comprising:
- a receiving unit, for receiving a traffic burst transferred by the network system via downlink channel in a downlink timeslot;
- a detecting unit, for detecting whether the traffic burst contains the ACN in the downlink timeslot in the next TTI;
- an extracting unit, for extracting the ACN when the traffic burst contains the ACN;
- a performing unit, for performing next-phase single-user JD algorithm to decrease interference by using the ACN.
Dependencies are inferred from the claim text.