Synchronization method and apparatus
First Claim
1. A method for synchronizing a first (1) and a second (31) communication end point during a connection mode change procedure, said method comprising the steps of:
- a) entering a connection mode change state at said first end point (1);
b) transmitting a connection mode change request message from said first end point (1) to said second end point (31);
c) entering a connection mode change state at said second end point (31) in response to a receipt of said connection mode change request message;
d) transmitting an acknowledgment message and a numbered frame from said second end point (31) to said first end point (1);
e) leaving said connection mode change state at said first end point (1) in response to a receipt of said acknowledgment message;
f) transmitting from said first end point (1) to said second end point (31) an acknowledgment acknowledging said numbered frame; and
g) leaving said connection mode change state at said second end point (31) in response to a receipt of said acknowledgment acknowledging said numbered frame.
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Accused Products
Abstract
The present invention relates to a synchronization method and apparatus, wherein a first end point entering a connection mode change state transmits a request message to a second end point. The second endpoint enters the connection mode change state in response to the receipt of the request message and transmits an acknowledgment and a numbered frame to the first end point. Having received the acknowledgment, the first endpoint leaves the connection mode change state and transmits an acknowledgment acknowledging the numbered frame to the second end point which leaves the connection mode change state in response to the receipt of the acknowledgment. Thus, the receipt of the acknowledgment acknowledging the numbered frame is received by the second end point irrespective of a DTX condition at the first end point, since a numbered frame is
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Citations
13 Claims
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1. A method for synchronizing a first (1) and a second (31) communication end point during a connection mode change procedure, said method comprising the steps of:
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a) entering a connection mode change state at said first end point (1);
b) transmitting a connection mode change request message from said first end point (1) to said second end point (31);
c) entering a connection mode change state at said second end point (31) in response to a receipt of said connection mode change request message;
d) transmitting an acknowledgment message and a numbered frame from said second end point (31) to said first end point (1);
e) leaving said connection mode change state at said first end point (1) in response to a receipt of said acknowledgment message;
f) transmitting from said first end point (1) to said second end point (31) an acknowledgment acknowledging said numbered frame; and
g) leaving said connection mode change state at said second end point (31) in response to a receipt of said acknowledgment acknowledging said numbered frame. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for achieving a synchronization with a communication end point (1) during a connection mode change procedure, said apparatus comprising:
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a) detecting means (34) for detecting a connection mode change request message received from said communication end point (1);
b) communication means (32) for performing a communication with said communication end point (1);
c) control means (33) for setting said communication means (32) into a connection mode change state in response to the detection result of said detection means (34);
d) wherein said communication means (32) is arranged to transmit an acknowledgment message and a numbered frame to said communication end point, in response to said setting by said control means (33) into said connection mode change state; and
e) wherein said control means (33) is arranged to control said communication means (32) so as to leave said connection mode change state in response to a receipt of an acknowledgment acknowledging said numbered frame from said communication end point (1). - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification