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System and method for accessing base station with serious uplink pilot time slot interference

A technology of pilot time slot and link access process, which is applied in the direction of transmission system, communication between multiple stations, electrical components, etc., and can solve problems such as interference

Inactive Publication Date: 2009-04-15
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] like image 3 As shown, in this example of the UpPTS shifting scheme, the DL signal from the neighbor cell causes interference to the TS1 of the target cell instead of the UPTS

Method used

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  • System and method for accessing base station with serious uplink pilot time slot interference
  • System and method for accessing base station with serious uplink pilot time slot interference
  • System and method for accessing base station with serious uplink pilot time slot interference

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Embodiment Construction

[0025] refer to Figure 4 , describes a wireless communication system 100 according to an embodiment of the present invention. A wireless communication system 100 includes a base station (BS), sometimes referred to as an evolved Node B (eNB), 102, and a plurality of mobile stations 104, represented here as user equipment (UE). UE 104 may be any mobile device, such as a cellular phone. Although in Figure 4 Only a single BS and three UEs are shown in , and the wireless communication system 100 may include any number of BSs and UEs. In the illustrated embodiment, the wireless communication system 100 is an LTE TDD-TYPE II communication system. However, in another embodiment, the wireless communication system 100 may be any communication system based on TDD.

[0026] As described in more detail below, when the UpPTS interference is severe, the wireless communication system 100 initiates a specific uplink (UL) access procedure without changing the subframe structure, such as s...

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Abstract

The invention discloses a system for accessing a base station under serious UpPTS interference and a method thereof. When the serious UpPTS interference is detected, a specific uplink access process is used. The specific uplink access process relates to performing a random access process without completing a coarse synchronizing process.

Description

Background technique [0001] In the TD-CDMA cellular mobile communication system, "radio frames" are used for signal transmission. Each radio frame is divided into time slots (TS) to convey information. In the TD-SCDMA system, the length of a radio frame is 10ms, and the radio frame is divided into two identical subframes of 5ms. Such as figure 1 As shown, in each subframe, there are a total of seven regular TSs denoted as TS0 to TS6, and three specific TSs denoted as DwPTS, GP and UpPTS. TS0 and TS1 are generally designed as downlink (DL) and uplink (UL) TSs, respectively. DwPTS and UpPTS are dedicated DL and UL pilot TSs for DL ​​and UL synchronization respectively. GP is the guard period (guard period). This subframe structure is also used in future LTE TDD-TYPE II systems. [0002] UL synchronization using a signal in the UpPTS is performed in a UL access procedure to access a base station (BS) of a wireless communication system. The UL access procedure consists of U...

Claims

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Application Information

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IPC IPC(8): H04W74/08H04B1/707H04B7/26
Inventor 张晓博马霓邬钢
Owner NXP BV