Packet Transmission in Wireless Networks

1 . A method comprising:

a) receiving, by a wireless device from a base station, at least one first 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 wireless device to said base station over said primary cell group, a first message addressed to an application server;

c) receiving, by said wireless device from said base station over said primary cell group, a second message originating from said application server, said second message responding to said first message;

d) transmitting, by said wireless device to said base station over said primary cell group, a second control message comprising the size of a buffer storing a first portion of a content;

e) receiving, by said wireless device from said base station, a third control message originating from said base station, said third control message to initiate an uplink timing synchronization process for said secondary cell group; and

f) transmitting, by said wireless device to said base station over said primary cell group and said secondary cell group, a plurality of content packets addressed to said application server, said plurality of content packets comprising a subset of said first portion of said content.

2 . The method of claim 1 , further comprising receiving, by said wireless device from said base station over a cell in said primary cell group, an activation command to activate one or more secondary cells in said secondary cell group, said activation command transmitted before transmission of said third control message.

3 . The method of claim 2 , wherein said activation command is received from said base station without encryption.

4 . The method of claim 1 , wherein said first message is a request message to establish a connection.

5 . The method of claim 1 , wherein said second message comprises an acknowledgement for a received packet.

6 . The method of claim 1 , wherein said second message comprises information about configuration parameters of said application server.

7 . The method of claim 1 , wherein said plurality of content packets are encrypted by said wireless device.

8 . 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.

9 . The method of claim 1 , wherein said third control message is a PDCCH order comprising a mask index and a random access preamble identifier.

10 . A method comprising:

a) receiving, by a wireless device from a base station, at least one first 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 wireless device to said base station over said primary cell group, a first message addressed to an application server;

c) transmitting, by said wireless device to said base station over said primary cell group, a second control message comprising the size of a buffer storing a first portion of a content;

d) receiving, by said wireless device from said base station, a third control message to initiate an uplink timing synchronization process for said secondary cell group; and

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

11 . The method of claim 10 , further comprising receiving, by said wireless device from said base station over a cell in said primary cell group, an activation command to activate one or more secondary cells in said secondary cell group, said activation command transmitted before transmission of said third control message.

12 . The method of claim 10 , wherein said first message is a request message to establish a connection.

13 . The method of claim 10 , wherein said plurality of content packets are encrypted by said wireless device.

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 . The method of claim 10 , wherein said third control message is a PDCCH order comprising a mask index and a random access preamble identifier.

16 . A method comprising:

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

b) transmitting, by said wireless device to said base station over said primary cell group, a first message addressed to an application server;

c) transmitting, by said wireless device to said base station over said primary cell group, a second control message comprising the size of a buffer storing a first portion of a content;

d) receiving, by said wireless device from said base station over said primary cell group, at least one third control message to cause configuration of a secondary cell group comprising at least one secondary cell;

e) receiving, by said wireless device from said base station, a fourth control message to initiate an uplink timing synchronization process for said secondary cell group; and

f) transmitting, by said wireless device to said base station over said primary cell group and said secondary cell group, a plurality of content packets addressed to said application server.

17 . The method of claim 16 , further comprising receiving, by said wireless device from said base station over a cell in said primary cell group, an activation command to activate one or more secondary cells in said secondary cell group, said activation command transmitted before transmission of said fourth control message.

18 . The method of claim 16 , wherein said first message is a request message to establish a connection.

19 . The method of claim 16 , 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.

20 . The method of claim 16 , wherein said fourth control message is a PDCCH order comprising a mask index and a random access preamble identifier.