Wireless Communications Systems Design

13 Wireless Communications Blocks Integration

We designed key wireless communication blocks and tried to optimize each parameter such as complexity, throughput, latency, and power consumption in Part II. Although each block is optimized, it is not easy to integrate them and find an optimal solution of wireless communication systems at high level. Thus, we discussed radio planning and link budget analysis in Chapter 11. We looked into the wireless communication system design flows and wireless communication system design considerations in Chapter 12. In this chapter, we will take a look at top level view of wireless communication systems, review 4G standards, and integrate each wireless communication block.

13.1 High Level View of Wireless Communications Systems

In order to exchange or broadcast data between communication systems, we need a standardized protocol. If not, it is difficult to understand the contents even if we receive a signal correctly. Thus, the International Standard Organisation (ISO) defined the Open Systems Interconnection (OSI) 7 layer model for network protocols. Although it is not widely used in industry and many standardization groups prefer a simpler model, it is good conceptual model characterizing the internal functions of wireless communication and network systems. The advantage of the OSI 7 layer model is that each layer is regarded as a black box and one layer transfers its input/output to another layer above/below the layer. Thus, we can ...