BUFFER CONTROLLER AND RADIO COMMUNICATION TERMINAL

• US 20110267999A1
• Filed: 06/16/2009
• Published: 11/03/2011
• Est. Priority Date: 01/16/2009
• Status: Abandoned Application

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Kuwahara, Yuji
• Application Number:
  US13/143,145
• Publication Number:
  US 20110267999A1
• Time in Patent Office: Days
• US Class Current: 370/310
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1841 Resequencing
• CPC Class Codes: H04L 47/30 in combination with information about buffer occupancy at either end or at transit nodes
• CPC Class Codes: H04L 49/90 Buffering arrangements
• CPC Class Codes: H04L 49/9005 using dynamic buffer space allocation
• CPC Class Codes: H04L 49/9023 for implementing a jitter-buffer
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04W 28/0278 using buffer status reports dynamic wireless traffic scheduling definition H04W72/12
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

Providing a buffer controller and a radio communication terminal capable of absorbing jitter. The buffer controller according to the present invention corresponds to a buffer controller provided in a communication terminal having a reception section which receives data through a network includes: a first data processing section which includes a first buffer that, in order to rearrange the data received by the receiver in a correct sequence, stays the data, and which performs a process of rearranging the data that are stayed in the first buffer, in the correct sequence; a second data processing section which includes a second buffer that buffers the data processed in the first data processing section, and which performs a process of outputting the data buffered in the second buffer, in accordance with a predetermined output rate; and a controller which, based on an amount of the data stayed in the first buffer, controls at least a capacity of the second buffer.

Claims

1. A buffer controller provided in a communication terminal having a receiver that receives data through a network, the buffer controller comprising:

a first data processing section which includes a first buffer that, in order to rearrange the data received by the receiver in a correct sequence, stays the data, and which performs a process of rearranging the data that are stayed in the first buffer, in the correct sequence;

a second data processing section which includes a second buffer that buffers the data processed in the first data processing section, and which performs a process of outputting the data buffered in the second buffer, in accordance with a predetermined output rate; and

a controller which, based on an amount of the data stayed in the first buffer, controls at least a capacity of the second buffer.

2. The buffer controller according to claim 1, wherein

the controller controls the second processing section so as to, as a staying amount of the data which is stayed in the first buffer is larger, further increase the capacity of the second buffer.

3. The buffer controller according to claim 2, wherein

the controller controls the second processing section so as to, as the staying amount of the data which is stayed in the first buffer is smaller, further decrease the capacity of the second buffer.

4. The buffer controller according to claim 1, wherein

the buffer controller further comprises a decoder which converts the data processed in the second data processing section, to an audio signal and a video signal, and,

in a case where a data amount of the data per unit of time which are output from the second data processing section to the decoder is smaller than an output rate that is preset to a predetermined value, the controller controls the first processing section so as to output the data stayed in the first buffer, to the second buffer.

5. A radio communication terminal including the buffer controller according to claim 1.

6. A radio communication terminal including the buffer controller according to claim 2.

7. A radio communication terminal including the buffer controller according to claim 3.

8. A radio communication terminal including the buffer controller according to claim 4.