Receiver Apparatus and Method for Releasing Memory Thereof

• US 20070233721A1
• Filed: 07/07/2005
• Published: 10/04/2007
• Est. Priority Date: 07/12/2004
• Status: Active Grant

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Sony Ericsson Mobile Communications Japan Incorporated (Sony Group Corp.)
• Inventors: Bazar, Isman
• Granted Patent: US 8,254,339 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 47/50 Queue scheduling
• CPC Class Codes: H04L 47/6215 Individual queue per QOS, rate or priority
• CPC Class Codes: H04L 49/90 Buffering arrangements
• CPC Class Codes: H04L 49/9005 using dynamic buffer space allocation
• CPC Class Codes: H04L 49/9094 Arrangements for simultaneous transmit and receive, e.g. simultaneous reading/writing from/to the storage element

Abstract

In a receiver apparatus of HSDPA (High Speed Downlink Packet Access) data transmission scheme, it is achieved to minimize the occurrence of the system performance degradation and problems caused by TSN flash execution. In the receiver apparatus, each of a plurality of reordering buffers that temporarily store received traffic data is ranked on the basis of QoS information of the traffic data. When it is determined that memory release of the reordering buffers is necessary, the memory release is performed from the lowest ranked reordering buffer.

Claims

1. A memory release method in a receiver apparatus of HSDPA (High Speed Downlink Packet Access) data transmission scheme, characterized by having:

a step of ranking each of a plurality of reordering buffers into which traffic data to receive are temporarily stored, on the basis of QoS information on the traffic data stored in the reordering buffer;

a step of judging that said reordering buffer needs memory-release; and

a step of releasing a memory from a lowest ranked one of said ranked reordering buffers when it is judged that memory-release is necessary.

2. The memory release method according to claim 1, characterized in that, as a premise of said ranking, matching of the plurality of reordering buffers to the QoS information is carried out under a predefined rule.

3. The memory release method according to claim 1, characterized in that matching of the plurality of reordering buffers to the QoS information is autonomously judged by using the QoS information on a PDP context on which the receiver apparatus and a network agree.

4. The memory release method according to claim 1, 2, or 3, characterized in that said QoS information is QoS attribute information containing at least one of “

Traffic Class”

, “

Traffic Handling Priority”

, and “

Max Bit Rate”

.

5. The memory release method according to claim 1, characterized by further having a step of determining a memory size of said memory to be released in accordance with an operation mode of RLC (Radio Link Control).

6. A receiver apparatus of HSDPA (High Speed Downlink Packet Access) data transmission scheme, characterized by having:

ranking means for ranking each of a plurality of reordering buffers into which traffic data to receive are temporarily stored, on the basis of QoS information on the traffic data stored in the reordering buffer;

judgment means for judging that said reordering buffer needs memory-release;

memory release means for releasing a memory from a lowest ranked one of said ranked reordering buffers when it is judged that memory-release is necessary; and

allocating means for allocating the reordering buffer, whose memory is released, to be used for new reception data.

7. The receiver apparatus according to claim 6, characterized in that, as a premise of said ranking, matching of the plurality of reordering buffers to the QoS information is carried out under a predefined rule.

8. The receiver apparatus according to claim 6, characterized in that said ranking means for ranking judges the matching of the plurality of reordering buffers to QoS information, by using the QoS information on a PDP context on which the receiver apparatus and a network agree.

9. The receiver apparatus according to claim 6, 7, or 8, characterized in that said QoS information is QoS attribute information containing at least one of “

Traffic Class”

, “

Traffic Handling Priority”

, and “

Max Bit Rate”

.

10. The receiver apparatus according to claim 6, characterized by further having means for determining a memory size of said memory to be released in accordance with an operation mode of RLC (Radio Link Control).

11. The receiver apparatus according to claim 6, characterized in that said judgment means for judging judges that it is necessary to release the memory, when detecting a situation where an amount of each of said reordering buffers used exceeds a specified value.

12. A receiver apparatus of HSDPA (High Speed Downlink Packet Access) data transmission scheme, characterized by having:

a ranking unit which ranks each of a plurality of reordering buffers into which traffic data to receive are temporarily stored, based on QoS information on the traffic data stored in the reordering buffer;

a judgment unit which judges that said reordering buffer memory needs memory-release;

a memory release unit which releases a memory from a lowest ranked one of said ranked reordering buffers when it is judged that memory-release is necessary; and

an allocating unit for allocating the reordering buffer, whose memory is released, to be used for new reception data.