Unlock instant, AI-driven research and patent intelligence for your innovation.

Methods and apparatus for operating a wireless communications system

A technology of wireless communication system and equipment, applied in wireless communication, transmission system, error prevention/detection using return channel, etc., can solve problems such as long waiting time

Inactive Publication Date: 2012-08-22
FUJITSU LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] If the BS responds to this condition with a "1", the MS whose ranging code failed to be decoded proceeds in the normal manner, as set forth in 16e, which results in long waiting times, as described above

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Methods and apparatus for operating a wireless communications system
  • Methods and apparatus for operating a wireless communications system
  • Methods and apparatus for operating a wireless communications system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0140] Embodiments of the present invention can provide a new method to reduce the waiting time of the ranging process.

[0141] Figure 12 A wireless communication system 10 is shown comprising a network station 12, in this case a base station, and a plurality of subscriber stations 14, labeled 14a-d. In this example, the wireless communication system 10 is a WiMAX network based on the IEEE 802.16 standard.

[0142] Figure 13 is a block diagram of an example of the base station 12 . The base station 12 includes a decoding status circuit 12-2 configured to prepare a detailed decoding status report, the purpose of which will be explained later.

[0143] Figure 15 is a block diagram of an example of a subscriber station 14. Subscriber station 14 includes network access circuitry 14-2.

[0144]In use, subscriber station 14 undergoes a network access procedure to attempt to access network resources controlled by base station 12 . In this example, part of the network acces...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A wireless communications system comprising at least one network station and a plurality of subscriber stations. As part of a network access procedure, a number of the subscriber stations selecting a time slot from a plurality of predefined time slots and transmitting an individual code to the network station in the selected time slot. At the network station, receiving and decoding the codes and broadcasting a preliminary decoding status report to the subscriber stations and broadcasting a detailed decoding status report associated with each time slot in which one or more codes were decoded successfully. At a subscriber station which transmitted a code, identifying successful decoding if the preliminary decoding status indicator associated with the time slot in which subscriber station transmitted its code comprises a positive indicator, and if the detailed decoding status report associated with that positive indicator identifies the code transmitted by the subscriber station.

Description

technical field [0001] The present invention relates to a method and a device for operating a wireless communication system. Background technique [0002] Ranging is an important process in the mobile WiMAX standard. The ranging procedure is used for power adjustment, timing offset estimation and synchronization between base stations (BS) and subscriber stations (SS) within a cell. [0003] During ranging, a ranging code is transmitted from the subscriber station to the base station to obtain information about network setup and to synchronize the link. Specifically, the ranging process can obtain the following types of information: [0004] SS presentation - either for network login, handover, or bandwidth contention; [0005] SS timing offset; [0006] • SS Frequency Offset (optional) - Carrier Frequency Offset (CFO) can also be determined in previous stages of connection setup using a pilot code transmitted from BS to SS. [0007] The SS performs the following differe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04W88/18H04B17/00
CPCH04W74/0866H04W74/0833H04L2027/002H04W74/002H04L27/0014H04W72/02H04L1/12
Inventor 鲁艳玲
Owner FUJITSU LTD