Carrier aggregation

1. A method implemented in a mobile communications system, comprising:

selecting primary component carrier c p for a new user according to formula,

c

p

=

arg

⁢

⁢

max

c

⁢

r

k

,

c

avg

l

c

where r k,c avg is reference signal received power (RSRP) averaged over a spectrum for user k on component carrier c;

performing joint secondary CC selection for one or more Long Term Evolution (LTE)-Advanced users and resource scheduling for one or more LTE users and said one or more LTE-Advanced users;

wherein the performing includes:

selecting an LTE-Advanced user according to a set of n−1 secondary CC assignments so that assigning a set of n−1 secondary CCs to the LTE-Advanced user maximizes an incremental value to an existing schedule;

selecting each of one or more secondary CCs iteratively for a given user so that adding said each of one or more secondary CCs maximizes an incremental value to an existing schedule;

determining the incremental value by allocating a resource block (RB) in the secondary CC to the given user based on an existing CC assignment; and

selecting the RB so that the incremental value is maximized.

2. The method as in claim 1 , wherein the performing comprises:

selecting a pair of an LTE-Advanced user and a secondary CC so that assigning the secondary CC to the LTE-Advanced user maximizes an incremental value to an existing schedule.

3. The method as in claim 2 , wherein the performing further comprises:

continuing the assignment until all of said one or more LTE-Advanced users have a share of secondary CCs.

4. The method as in claim 1 , wherein the selecting the RB is performed by taking a finite user buffer into account.

5. The method as in claim 1 , further comprising:

continuing the assignment until all of said one or more LTE-Advanced users have a set of secondary CCs.

6. The method as in claim 1 , wherein the mobile communications system is a base station.

7. A mobile communications system comprising:

a first selection unit to select primary component carrier c p for a new user according to formula,

c

p

=

arg

⁢

⁢

max

c

⁢

r

k

,

c

avg

l

c

where r k,c avg is reference signal received power (RSRP) averaged over a spectrum for user k on component carrier c; and

a performance unit to perform joint secondary CC selection for one or more Long Term Evolution (LTE)-Advanced users and resource scheduling for one or more LTE users and said one or more LTE-Advanced users;

wherein the performance unit selects an LTE-Advanced user according to a set of n−1 secondary CC assignments so that assigning a set of n−1 secondary CCs to the LTE-Advanced user maximizes an incremental value to an existing schedule;

wherein the performance unit further selects each of one or more secondary CCs iteratively for a given user so that adding said each of one or more secondary CCs maximizes an incremental value to an existing schedule;

wherein the performance unit further determines the incremental value by allocating a resource block (RB) in the secondary CC to the given user based on an existing CC assignment, and selects the RB so that the incremental value is maximized.

8. The mobile communications system as in claim 7 , wherein the performance unit selects a pair of an LTE-Advanced user and a secondary CC so that assigning the secondary CC to the LTE-Advanced user maximizes an incremental value to an existing schedule.

9. The mobile communications system as in claim 8 , wherein the performance unit further continues the assignment until all of said one or more LTE-Advanced users have a share of secondary CCs.

10. The mobile communications system as in claim 7 , wherein the selecting the RB is performed by taking a finite user buffer into account.

11. The mobile communications system as in claim 7 , further performance unit further continues the assignment until all of said one or more LTE-Advanced users have a set of secondary CCs.

12. The mobile communications system as in claim 7 , wherein the mobile communications system is a base station.