Wireless device connection to an application server

1. A method comprising:

a) transmitting, by a base station to a wireless device, at least one control message configured to cause in said wireless device:

i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; and

ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising:

(1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell; and

(2) a secondary cell group comprising a second subset of said at least one secondary cell;

b) transmitting, by said base station to said wireless device over said primary cell group, a first message comprising a content descriptor and originating from an application server in a communication network, said content descriptor describing content residing on said application server;

c) receiving, by said base station from said wireless device over said primary cell group, a second message addressed to said application server, said second message requesting said content;

d) transmitting by said base station to said wireless device over said primary cell group:

i) a first plurality of content packets comprising a first portion of said content; and

ii) an activation command activating one or more secondary cells in said secondary cell group; and

e) transmitting, by said base station to said wireless device over said primary cell group and said secondary cell group, a second plurality of content packets comprising a second portion of said content.

2. The method of claim 1 , wherein:

a) said first portion of said content is transmitted in a first time period;

b) said second portion of said content is transmitted in a second time period;

c) said first time period and said second time period do not overlap; and

d) said first time period precedes said second time period.

3. The method of claim 1 , wherein packets in said first plurality of content packets and said second plurality of content packets are encrypted packets.

4. The method of claim 1 , wherein said first message, said second message, said first portion of said content, and said second portion of said content are transmitted over the same radio bearer.

5. The method of claim 1 , wherein said configuration further assigns a first secondary cell in said at least one secondary cell with a deactivation timer, said deactivation timer restarting in response to a packet transmission on said first secondary cell, said first secondary cell deactivating in said wireless device in response to said deactivation timer expiring.

6. The method of claim 1 , wherein said activation command is transmitted to said wireless device without encryption.

7. The method of claim 1 , further comprising transmitting, by said base station to said wireless device, a control command initiating an uplink timing synchronization process for said secondary cell group.

8. The method of claim 1 , wherein said secondary cell group is out-of-sync when said second plurality of content packets are transmitted over said primary cell group and said secondary cell group.

9. The method of claim 1 , wherein:

a) uplink transmissions by said wireless device in said primary cell group employ a first synchronization signal transmitted on said primary cell as a primary timing reference; and

b) uplink transmissions in said secondary cell group employ a second synchronization signal on an activated secondary cell in said secondary cell group as a secondary timing reference.

10. A method comprising:

a) transmitting, by a base station to a wireless device, at least one control message configured to cause in said wireless device:

i) configuration of a plurality of cells comprising a primary cell and at least one secondary cell; and

ii) assignment of each of said at least one secondary cell to a cell group in a plurality of cell groups, said plurality of cell groups comprising:

(1) a primary cell group comprising a first subset of said plurality of cells, said first subset comprising said primary cell; and

(2) a secondary cell group comprising a second subset of said at least one secondary cell;

b) transmitting, by said base station to said wireless device over said primary cell group, a first message comprising a content descriptor and originating from an application server, said content descriptor describing content residing on said application server;

c) receiving, by said base station from said wireless device over said primary cell group, a second message addressed to said application server, said second message requesting said content;

d) transmitting, by said base station to said wireless device over said primary cell group, an activation command activating one or more secondary cells in said secondary cell group; and

e) transmitting, by said base station to said wireless device over said primary cell group and said secondary cell group, a plurality of content packets comprising a portion of said content.

11. The method of claim 10 , wherein said activation command is transmitted to said wireless device without encryption.

12. The method of claim 10 , wherein said first message, said second message, and said portion of said content are transmitted over the same radio bearer.

13. The method of claim 10 , further comprising transmitting, by said base station to said wireless device, a control command initiating an uplink timing synchronization process for said secondary cell group.

14. The method of claim 10 , wherein:

a) uplink transmissions by said wireless device in said primary cell group employ a first synchronization signal transmitted on said primary cell as a primary timing reference; and

b) uplink transmissions in said secondary cell group employ a second synchronization signal on an activated secondary cell in said secondary cell group as a secondary timing reference.

15. A method comprising:

a) transmitting, by a base station to a wireless device, at least one first control message configured to cause configuration of a primary cell group comprising at least one first cell;

b) transmitting, by said base station to a wireless device over said primary cell group, a first message comprising a content descriptor and originating from an application server in a communication network, said content descriptor describing content residing on said application server;

c) receiving, by said base station from said wireless device over said primary cell group, a second message addressed to said server, said second message requesting said content;

d) transmitting by said base station to said wireless device over said primary cell group:

i) a first plurality of content packets comprising a first portion of said content originating from said application server;

ii) at least one second control message configured to cause configuration of a secondary cell group comprising at least one secondary cell; and

iii) an activation command activating one or more secondary cells in said secondary cell group; and

e) transmitting, by said base station to said wireless device over said primary cell group and said secondary cell group, a second plurality of content packets comprising a second portion of said content.

16. The method of claim 15 , wherein:

a) said first portion of said content is transmitted in a first time period;

b) said second portion of said content is transmitted in a second time period;

c) said first time period and said second time period do not overlap; and

d) said first time period precedes said second time period.

17. The method of claim 15 , wherein packets in said first plurality of content packets and said second plurality of content packets are encrypted packets.

18. The method of claim 15 , wherein said activation command is transmitted to said wireless device without encryption.

19. The method of claim 15 , wherein said first message, said second message, said first portion of said content, and said second portion of said content are transmitted over the same radio bearer.

20. The method of claim 15 , wherein said secondary cell group is out-of-sync when said second plurality of content packets are transmitted over said primary cell group and said secondary cell group.