Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

HSDPA system power, synchronization control, beam shaping method and base station

A synchronous control and power control technology, applied in the direction of transmission control/equalization, diversity/multi-antenna system, space transmit diversity, etc., can solve the problem of not considering the power control and synchronization control problems, and achieve the goal of improving the accuracy of signal transmission. Effect

Inactive Publication Date: 2008-12-03
TD TECH COMM TECH LTD
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the TD-SCDMA system has a frequency / synchronization control scheme, HSDPA cannot completely follow the TD-SCDMA scheme, because the power / synchronization control of TD-SCDMA is for the dedicated physical channel (DPCH), and each physical channel only Belonging to a certain UE, in power control or synchronization control, once the connection is established, there is no need to care about the change of the corresponding relationship between the physical channel and the UE; while the HS-SCCH and HS-SICH in HSDPA belong to the shared physical channel (DSCH), HS-SCCH and HS-SICH are time-division multiplexed for multiple UEs. For example, for a certain HS-SCCH, it is often necessary to switch between multiple UEs, but the existing TD-SCDMA power / synchronization control scheme does not consider the channel Power control and synchronization control issues when switching

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
  • HSDPA system power, synchronization control, beam shaping method and base station
  • HSDPA system power, synchronization control, beam shaping method and base station
  • HSDPA system power, synchronization control, beam shaping method and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Firstly, the first embodiment is introduced, ULPC is performed for HS-SICH in the HSDPA system:

[0042] As mentioned above, HS-SICH is an uplink shared physical channel, which can be time-division multiplexed by multiple UEs. When a certain UE occupies some sub-frames of this HS-SICH for a certain period of time, the rest The UE cannot transmit on these HS-SICH subframes. The HS-SCCH and HS-SICH are allocated in pairs by the RNC, and commands such as PC (Power Control, power control) and SS (Synchronization Shift, synchronization shift) generated according to the HS-SICH parameters are carried by the corresponding HS-SCCH to UE. Assuming that HS-SICH is shared by multiple UEs: UE1, UE2...UEn, each HSDPA user has its own uplink / downlink dedicated physical channel (UL / DL DPCH). The existing ULPC algorithm needs to establish a ULPC storage area (ULPC memory block) for the channel to be controlled by uplink power to save the relevant parameters of the channel ULPC, these...

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

The invention discloses a method for controlling the power of the HSDPA system, which aims at the HS-SICH and includes the steps of: real-time monitoring the corresponding relationship between the HS-SCCH as well as the HS-SICH and UE, and obtaining a time parameter of the corresponding relationship between the channel and the UE; a first stage, which is the stage from the first HS-SCCH subframe transmitted from the base station to the generation of the power control instruction by utilizing the first HS-SICH subframe fed back by the UE, wherein, the power control instruction can be set to be up or down randomly or alternately; a second stage, which is the stage from the generation of the power control instruction by utilizing the first HS-SICH subframe fed back by the UE to the last HS-SCCH subframe transmitted for the UE, wherein, the power control instruction can be set by utilizing the power control parameters obtained from the calculation of the HS-SICH subframe; the base station transmits the HS-SCCH subframe carrying the power control instruction to the UE. The invention also discloses a power control method aiming at the HS-SCCH, a base station and a down beam shaping proposal.

Description

technical field [0001] The present invention relates to the technical field of high-speed downlink packet access (HSDPA), in particular to a HSDPA system power / synchronous control method, beam forming method and base station equipment. Background technique [0002] High Speed ​​Downlink Package Access (HSDPA) is a technology proposed in 3GPP R5 to provide high-speed downlink data transmission for multiple users. It is Time Division Synchronous CDMA (TD-SCDMA) ) enhanced version. In the HSDPA technology, three shared physical channels are used to realize the data communication between the base station (Node B) and the user equipment (UE). The three physical channels are High Speed ​​Downlink Shared Control Channel (HS-SCCH), High Speed ​​Uplink Shared Information Channel (HS-SICH) and High Speed ​​Physical Downlink Shared Channel (HS-PDSCH). [0003] Wherein, HS-SCCH is an HSDPA downlink control channel, which is a physical channel, and it is used to carry all relevant cont...

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
IPC IPC(8): H04B7/005H04B7/04H04Q7/22
Inventor 魏立梅佟学俭徐绍君曾奇志
Owner TD TECH COMM TECH LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com