Method, apparatus and computer program to dynamically adjust segmentation at a protocol layer, such as at the medium access control (MAC) layer

A computer program and protocol layer technology, applied in the field of wireless digital communication systems, can solve problems such as reducing the flexibility of scheduling link adaptation

Inactive Publication Date: 2008-06-04
NOKIA CORP
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  • Abstract
  • Description
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Problems solved by technology

[0003] However, the inventors have realized that conventional static segment sizes impose restrictions and additional requirements on c

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  • Method, apparatus and computer program to dynamically adjust segmentation at a protocol layer, such as at the medium access control (MAC) layer
  • Method, apparatus and computer program to dynamically adjust segmentation at a protocol layer, such as at the medium access control (MAC) layer
  • Method, apparatus and computer program to dynamically adjust segmentation at a protocol layer, such as at the medium access control (MAC) layer

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Embodiment Construction

[0014] Exemplary embodiments of the present invention relate to the segmentation of packet data between two protocol layers capable of supporting data packets of different sizes. A non-limiting example is L1 and L2 as in a Universal Terrestrial Radio Access Network - Long Term Evolution (UTRAN-LTE) cellular communication system (also sometimes referred to as a "3.9G" system).

[0015] Note that although the following description is mainly made using the example of the packet segmentation unit arranged in the medium access control (MAC) protocol layer, in other implementations, the packet segmentation unit may be arranged in different protocol layers , for example in the Radio Link Control (RLC) or the Radio Network Layer (RNL), or may even be arranged at the PHY layer. However, in all these possible implementations, an exemplary embodiment of the present invention is characterized in that the size of the segments can be varied according to dynamic changes, such as but not limi...

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Abstract

In one exemplary aspect thereof the invention provides a method that operates to receive information through at least one input of a protocol layer packet segmentation unit and to dynamically vary packet segment size in accordance with the received information prior to transmission to a receiver. The information received through the at least one input may include information related to channel quality for a channel through which packet data are transmitted to the receiver. The information received through the at least one input may also be or may include information received from at least one of a higher protocol layer or a lower protocol layer.

Description

technical field [0001] Exemplary embodiments of the present invention relate generally to wireless communication networks, systems, methods, and computer programs, and more particularly, to wireless digital communication systems that communicate packet-based data from a transmitter to a receiver. Background technique [0002] In a packet-based wireless communication system, the system receives packets from upper layers (eg, from the Internet Protocol (IP) layer). These packets then need to be transmitted over a wireless (eg, cellular) channel, which may provide different and time-varying instantaneous data rates to particular users. Possible reasons for a change in data rate may include: different quality of service (QoS) requirements, different instantaneous channel conditions, and previously maintained data rates. However, an important point to consider is that data packets received from upper layers should be divided (or segmented or segmented) into smaller data units to...

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Application Information

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IPC IPC(8): H04L1/00H04B7/005
CPCH04B17/0042H04L1/0007H04W28/06H04L1/1867H04L1/0026H04B17/309H04L69/32H04L9/40
Inventor F·弗雷德里克森P·莫根森J·卡塔瓦M·P·兰纳
Owner NOKIA CORP
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