Random access preamble transmission
First Claim
Patent Images
1. A method comprising:
- a) receiving, by a wireless device, at least one radio resource control (RRC) message from a base station, said at least one RRC message;
i) causing configuration of a plurality of carriers comprising a first carrier and at least one second carrier; and
ii) comprising a carrier group index for a second carrier in said at least one second carrier, said carrier group index identifying a carrier group, said carrier group being one of a plurality of carrier groups, said plurality of carrier groups comprising;
(1) a first carrier group comprising a first subset of said plurality of carriers, said first subset comprising said first carrier, uplink transmissions by said wireless device in said first carrier group employing a first synchronization signal transmitted on said first carrier as a first timing reference; and
(2) a second carrier group comprising a second subset of said at least one second carrier;
b) receiving, by said wireless device from said base station, a control command causing said wireless device to initiate a random access procedure;
c) transmitting to said base station a second random access preamble on said second carrier;
d) if no second random access response corresponding to said second random access preamble is received within a random access response window and if a second counter of said second random access preamble transmissions is below a second predefined value, repeating (c) and (d); and
e) if said second counter reaches said second predefined value without receiving said second random access response, said wireless device;
i) completing said random access procedure; and
ii) keeping an RRC connection with said base station active.
2 Assignments
0 Petitions
Accused Products
Abstract
A wireless device receives a control command to transmit a random access preamble on a second carrier. The wireless device repeatedly transmits the random access preamble until a random access response corresponding to the random access preamble is received or a predefined number of transmissions is reached. If the predefined number of transmissions is reached without receiving the random access response, the wireless device keeps an RRC connection with the base station active.
-
Citations
20 Claims
-
1. A method comprising:
-
a) receiving, by a wireless device, at least one radio resource control (RRC) message from a base station, said at least one RRC message; i) causing configuration of a plurality of carriers comprising a first carrier and at least one second carrier; and ii) comprising a carrier group index for a second carrier in said at least one second carrier, said carrier group index identifying a carrier group, said carrier group being one of a plurality of carrier groups, said plurality of carrier groups comprising; (1) a first carrier group comprising a first subset of said plurality of carriers, said first subset comprising said first carrier, uplink transmissions by said wireless device in said first carrier group employing a first synchronization signal transmitted on said first carrier as a first timing reference; and (2) a second carrier group comprising a second subset of said at least one second carrier; b) receiving, by said wireless device from said base station, a control command causing said wireless device to initiate a random access procedure; c) transmitting to said base station a second random access preamble on said second carrier; d) if no second random access response corresponding to said second random access preamble is received within a random access response window and if a second counter of said second random access preamble transmissions is below a second predefined value, repeating (c) and (d); and e) if said second counter reaches said second predefined value without receiving said second random access response, said wireless device; i) completing said random access procedure; and ii) keeping an RRC connection with said base station active. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method comprising:
-
a) receiving, by a wireless device, at least one radio resource control (RRC) message from a base station, said at least one RRC message; i) causing configuration of a plurality of carriers comprising a first carrier and at least one second carrier; and ii) comprising a carrier group index for a second carrier in said at least one second carrier, said carrier group index identifying a carrier group, said carrier group being one of a plurality of carrier groups, said plurality of carrier groups comprising; (1) a first carrier group comprising a first subset of said plurality of carriers, said first subset comprising said first carrier; and (2) a second carrier group comprising a second subset of said at least one second carrier; b) receiving, by said wireless device from said base station, a control command causing said wireless device to initiate a random access procedure; c) transmitting to said base station a second random access preamble on said second carrier; d) if no second random access response corresponding to said second random access preamble is received within a random access response window and if a second counter of said second random access preamble transmissions is below a second predefined value, repeating (c) and (d); and e) if said second counter reaches said second predefined value without receiving said second random access response, said wireless device; i) completing said random access procedure; and ii) keeping an RRC connection with said base station active. - View Dependent Claims (11, 12, 13)
-
-
14. A wireless device comprising:
-
a) one or more communication interfaces configured to communicate with a base station via at least one wireless link; b) one or more processors; and c) memory storing instructions that, when executed by said one or more processors, cause said wireless device to; i) receive at least one radio resource control (RRC) message from said base station, said at least one RRC message; (1) causing configuration of a plurality of carriers comprising a first carrier and at least one second carrier; and (2) comprising a carrier group index for a second carrier in said at least one second carrier, said carrier group index identifying a carrier group, said carrier group being one of a plurality of carrier groups, said plurality of carrier groups comprising; (a) a first carrier group comprising a first subset of said plurality of carriers; and (b) a second carrier group comprising a second subset of said at least one second carrier; ii) receive from said base station, a control command causing said wireless device to initiate a random access procedure; iii) transmit to said base station a second random access preamble on said second carrier; iv) repeat (iii) and (iv) if no second random access response corresponding to said second random access preamble is received within a random access response window and if a second counter of said second random access preamble transmissions is below a second predefined value; and iv) keep an RRC connection with said base station active if said second counter reaches said second predefined value without receiving said second random access response. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification