Communication Systems for the Mobile Information Society phần 6 ppt

... terminal. Therefore, the SGSN simply forwards all incoming data packets from the GGSN to the RNC regardless of the current state of the mobile. If the mobile is currently in either the Cell-PCH or the ... Systems for the Mobile Information Society than the current cell. The RNC can then decide to redirect the data stream to a different cell. As the conce...

Ngày tải lên: 14/08/2014, 09:21

... 307 6. 4 The Bluetooth Protocol Stack 309 6. 4.1 The Baseband Layer 310 6. 4.2 The Link Controller 315 6. 4.3 The Link Manager 317 6. 4.4 The HCI Interface 319 6. 4.5 The L2CAP Layer 321 6. 4 .6 The ... channel 2 Communication Systems for the Mobile Information Society Figure 1.1 Switching matrix in a switching center designed for voice communication f...

Ngày tải lên: 14/08/2014, 09:21

... exchange user information with each other if the client device switches to a new access point. Therefore, all access points 230 Communication Systems for the Mobile Information Society Access Point Terminal Empty ... informed of the location change, it ignores the incoming packets. The change of access points is transparent for the higher layers of the protocol s...

Ngày tải lên: 14/08/2014, 09:21

... Therefore, it is necessary for example to convert a voice signal for a connection between France and the United States. 20 Communication Systems for the Mobile Information Society Figure 1. 16 ... go through the authentication phase and the activation of the ciphering for the channel. Only afterwards can the network forward further information to the mobi...

Ngày tải lên: 14/08/2014, 09:21

... call. Communication Systems for the Mobile Information Society Martin Sauter © 20 06 John Wiley & Sons, Ltd 62 Communication Systems for the Mobile Information Society again limited to a certain duration. Other ... GPRS 50 Communication Systems for the Mobile Information Society in a next step. Once the new BSC has prepared the speech channe...

Ngày tải lên: 14/08/2014, 09:21

... content for which they would also have to pay on the fixed-line Internet. 1 16 Communication Systems for the Mobile Information Society the MSISDN. PLMN stands for public land mobile network, the ... device. The web browser for example is one of the most 100 Communication Systems for the Mobile Information Society Once the attach procedure is c...

Ngày tải lên: 14/08/2014, 09:21

... evolve the two parts of the network 138 Communication Systems for the Mobile Information Society which two are orthogonal to each other (C2,1 and C2,2). On the third level with four chips, there ... preferred compared to losing the connection entirely. 164 Communication Systems for the Mobile Information Society Figure 3.24 Factors influencing the qualit...

Ngày tải lên: 14/08/2014, 09:21

... replies to the message with a dynamic service addition response (DSA-RSP) message. 262 Communication Systems for the Mobile Information Society Here, information about the burst that contains the MAC ... overview of the 802. 16 standard and compares the capabilities and design of the system to other technologies like HSDPA and wireless Communication Systems...

Ngày tải lên: 14/08/2014, 09:21

... connection, the L2CAP layer can then use this information to reassemble the L2CAP packet from several ACL packets, which is then forwarded to the application layer. 2 96 Communication Systems for the Mobile ... of these systems can be taken as an example, networks based on 802. 16 should have an interesting and exciting future. 310 Communication Systems for the...

Ngày tải lên: 14/08/2014, 09:21

... indication of the loudness of the signal in the sub-band. 340 Communication Systems for the Mobile Information Society send the business card stored in the retrieving device during a request for a business ... headset sends the following command to the audio gateway to open the speech path: ‘at+ckpd=200’. The mobile phone 328 Communication Systems for...

Ngày tải lên: 14/08/2014, 09:21