Teletopix is now TELETOPIX.ORG

Teletopix is Now Teletopix.org

2012-07-10T12:42:00.002+05:30

We Are Now Move,.. TELETOPIX.BLOGSPOT.COM --> TELETOPIX.ORG LIST OF LINK AS BELOW : HOME LTE / 4G WCDMA / 3G CDMA GSM WIMAX TELECOM NEWS THANKS FOR SUPPORT.

BCH ,CBCH and CCCH works in GSM

2012-07-04T12:02:00.005+05:30

Broadcast Channels (BCH) Frequency correction channel (FCCH) the “lighthouse” of a BTS Synchronization channel (SCH) PLMN/base identifier of a BTS plus synchronization information (frame number) Broadcast control channel (BCCH) to transmit system information 1-4, 7-8 (differs in GSM 900, GSM 1800, and PCS 1900) CBCH and CCCH CBCH (Cell Broadcast Channel) transmits cell broadcast

Basic Function of Uplink & Downlink Transport Channel in LTE

2012-07-04T10:47:00.004+05:30

Basic Function of Uplink & Downlink Transport Channel in LTE Downlink Transport Channel Broadcast Channel (BCH) A fixed TF Used for transmission of parts of BCCH, so called MIB Paging Channel (PCH) Used for transmission of paging information from PCCH Supports discontinuous reception (DRX) Downlink Shared Channel (DL-SCH) Main transport channel used for transmission of downlink data

Which types of information carries By Logical Channel in LTE?

2012-07-03T11:50:00.003+05:30

Below types of information carries By Logical Channel in LTE Control Channels Broadcast Control Channel (BCCH) :used for transmission of system information from the network to all UEs in a cell. Paging Control Channel (PCCH) :used for paging of UEs whose location on cell level is not known to the network. Common Control Channel (CCCH) :used for transmission of control information in

EPS Bearer Terminology in LTE

2012-07-02T15:48:00.002+05:30

EPS Bearer Terminology in LTE Quality of service GBR bearer: Guaranteed bit rate Non-GBR bearer: No guaranteed bit rate Establishment time Default bearer Established when UE connects to PDN Provides always-on connectivity Always non-GBR Dedicated bearer established later Can be GBR or non-GBR Every EPS bearer QoS class identifier (QCI): This is a number which describes

Inter-cell interference coordination (ICIC) in LTE

2012-07-02T11:23:00.004+05:30

Inter-cell interference coordination (ICIC) in LTE To aid downlink ICIC Relative narrowband transmission-power indicator A cell can provide this information to neighboring cells, indicating the part of the bandwidth where it intends to limit the transmission power. A cell receiving the indication can schedule its downlink transmissions within this band, reducing the output power or

LTE Key Features in Short

2012-06-30T10:50:00.003+05:30

LTE Key Features in Short Downlink: OFDMA (Orthogonal Frequency Division Multiple Access) Less critical AMP efficiency in BS side Concerns on high RX complexity in terminal side Uplink: SC-FDMA (Single Carrier-FDMA) Less critical RX complexity in BS side Critical AMP complexity in terminal side (Cost, power Consumption, UL coverage) Single node RAN (eNB) Support FDD (frame type 1) &

BENEFITS OF MULTI-ANTENNA TECHNIQUES IN LTE

2012-06-29T10:06:00.000+05:30

BENEFITS OF MULTI-ANTENNA TECHNIQUES IN LTE The availability of multiple antennas at the transmitter and/or the receiver can be utilized in different ways to achieve different aims: Multiple antennas at the transmitter and/or the receiver can be used to provide additional diversity against fading on the radio channel. In this case, the channels experienced by the different antennas should

Verizon & T-Mobile Going to Swap Radio Spectrum

2012-06-26T14:05:00.002+05:30

T-Mobile USA has announced a deal to swap blocks of radio spectrum with Verizon Wireless in 218 markets across the country. T-Mobile said the purchase will improve its spectrum position in 15 of the top 25 markets in the USA. The deal would be dependent on forthcoming Verizon spectrum purchases, currently being scrutinized by the FCC. But, if the deals with SpectrumCo, Cox, and Leap go

How MAC Layer work's in Wimax?

2012-06-22T19:43:00.000+05:30

The MAC layer is oriented to the connections. Each connection corresponds to a service flow. The service flow defines the QoS parameters of PDU transmitted over the connection. The design core of the MAC protocol is the concept of service flow architecture on the connection. The service flow provides an uplink/downlink QoS management mechanism. An MS is based on a connection to request

How Sub-Carrier Allocation in Wimax?

2012-06-22T19:39:00.004+05:30

Sub-Carrier Allocation Mode 1 DL PUSC - Downlink partial Usage Sub-Channels The downlink PUSC replacement zone is unique, that must exist in the frame structure specified by the protocols. DL PUSC with all SC - PUSC with all sc indicates the PUSC replacement mode when all the bandwidth resources are used. DL FUSC- Downlink Full Usage Sub- Channels Sub-Carrier Allocation Mode 2 UL PUSC -

Apple Fined by Australian Court for Misleading 4G

2012-06-21T20:05:00.002+05:30

Following action taken by the Australian Competition and Consumer Commission, the Federal Court has ordered Apple to pay AU$2.25 million in civil pecuniary penalties for misleading advertising in relation to the promotion of its "iPad with WiFi + 4G" which has been found to have contravened the Australian Consumer Law. Apple promoted the "iPad with WiFi + 4G" in Australia from 8 March to 12

LTE Downlink & Uplink Physical Channel

2012-06-21T12:26:00.005+05:30

LTE Downlink Physical Channel Physical Downlink Shared Channel ( PDSCH) This channel is used for unicastand paging functions. Carries the DL-SCH and PCH. QPSK,16-QAM,and 64-QAM Modulation. Physical Downlink Control Channel (PCSCH) Informs the UE about the resource allocation of PCH and DL-SCH, and Hybrid ARQ information related to DL-SCH. Carries the uplink scheduling grant. QPSK

How Many LTE Downlink Transport Channel ? How its Work?

2012-06-21T12:20:00.003+05:30

Paging Channel ( PCH) Supports UE discontinuous reception (DRX) to enable UE power saving. Broadcasts in the entire coverage area of the cell. Mapped to physical resources which can be used dynamically also for traffic/other control channels. Broadcast Channel ( BCH ) The LTE transport channel maps to Broadcast Control Channel (BCCH). Fixed, pre-defined transport format. Broadcast in the

ZTE Launches First LTE BeamHop AAS Solution

2012-06-20T17:52:00.006+05:30

ZTE has launched what it says is the industry's first LTE BeamHop Solution and demonstrated the LTE A8808 Active Antenna System (AAS) product based on this technology. Based on the LTE BeamHop Solution, the A8808 product consists of both active and passive antennae. The passive part replaces operators' existing 2G and 3G antennae, while the active part is used for the newly added LTE

Huawei Completes First EHRPD Optimized Handoff Test

2012-06-19T17:32:00.002+05:30

Huawei today announced the successful completion of a commercial test for LTE to CDMA evolved, High-Rate Packet Data (eHRPD) optimized handoff. eHRPD means the evolution and improvement of the original CDMA EV-DO network. eHRPD acts as a bridge from CDMA to LTE by ensuring service continuity while protecting existing operator investment. In the initial stage of LTE deployment,

Packet-Switched Radio Interface in LTE

2012-06-18T16:14:00.001+05:30

LTE has been designed as a completely packet-oriented multi service system, without the reliance on circuit-switched connection-oriented protocols prevalent in its predecessors. In LTE, this philosophy is applied across all the layers of the protocol stack. The route towards fast packet scheduling over the radio interface was already opened by HSDPA, which allowed the transmission of short

What is inside SIM Card (Subscriber Identity Module) ?

2012-06-18T15:31:00.001+05:30

Subscriber Identity Module (SIM) The SIM as mentioned previously is a “smart card” which plugs into the ME and contains information about the MS subscriber hence the name Subscriber Identity Module. The SIM contains several pieces of information: International Mobile Subscriber Identity (IMSI)This number identifies the MS subscriber. It is only transmitted over the air during

How To Set Pilot Search Window Sizes in CDMA ?

2012-06-18T15:25:00.000+05:30

When the handset first powers up, it does an exhaustive search for the best pilot. No windows are used in this process. On the paging channel, the handset learns the window sizes SRCH_WIN_A, N, R and uses them when looking for neighbors both in idle mode and during calls. When a strong neighbor is requested in a PSMM, the former neighbor pilot is now a candidate. Its offset is precisely

Advantages of CDMA Handoff

2012-06-18T15:14:00.000+05:30