The architecture for routing packets is important for Applications that raise the radio to the level of a CR performance in MANETs. The approaches are generally can be integrated in a standard way. It is expected that divided into proactive and reactive algorithms. In a DARPA's XG program will provide a CR application proactive-routing environment, routing data, often in the for policy-driven, dynamic spectrum access on a non- form of a routing table, are maintained so that a node has interference basis that executes on JTRS radios. XG a good idea of where to send a packet to advance it is the front-runner in the race to provide the first toward its final destination, and a node may know with military CR. CHAPTER 2.4b Cognitive radio: The technologies required Subscriber 1 Subscriber 2 Service Public Safety Provider Spectrum Manager Subscriber 1 Calls Subscriber 2 Subscriber 1 Talks with Subscriber 2 on Usual Channel Service Provider Running Out of Channels Service Provider Requests Sublease Spectrum Manager Grants Sublease Service Provider Commands Channel Change Subscriber 1 Talks with Subscriber 2 on Sublease Periodic Handshake Confirming Sublease Service Provider Commands Channel Change on Sublease Termination Termination Acknowledge Billing Record Sent Figure 2.4b-5 Spectrum subleasing sequence. One motivation for CR is the potential income stream derived from subleasing idle spectrum on a non-interference basis. 2.4b.5.7 Spectrum awareness and SO. Subleasing has the benefit of producing an income potential for sublease or borrow stream from only managing the resource. Given proper behavior by lessees and lessors, the system may become The Spectrum Policy Task Force (SPTF) recommends popular and open up the spectrum for greater utilization. that license holders in exclusive management policy bands be allowed to sublease their spectrum. Figure 2.4b-5 shows a sequence diagram for spectrum subleasing from 2.4b.6 Funding and research a public safety spectrum owner. During the initial contact in CRs between the s