In heteroneneous wireles network,integration of cellular and wireless network is very complex and important issue.Integration of cellular and wireless are used to improve quality of service (QoS),battery duration improvement and utilization of all resources to be maximized.In this study ,we proposed a radio resurce management in heterogeneous wireless network to reduce horizontal handoff as well as to reduce vertical handoff(VHO).Here two Radio Access Technologies(RATs) are considered out of that one is cellular and second wireless Local Area Networks(WLANs).In this paper three handoff techniques are compared and one of the best will be selected for heterogeneous wireless networks.The results shows that selection of radio access technologies and decession of vertical handoff(VHO) is very important.

1. 3 GPP,”Quality of service (QoS) concept and architecture (release6),”3GPP TS 23.107 V6.4.0, Mar2006.
2. ”Multi-class Resource Management in Cellular/WLAN Integrated Network”by Wei Song and Weihua Zhuang IEEE Communication society,WCNC 2007 Proceeding.
3. “Performance Analysis of Common Radio Resource Management Scheme in Multi-service Heterogeneous Wireless Networks” Abdul Hasib and Abraham O.Fapojuwo in IEEE Communications Society, WCNC 2007 Proceedings.
4. ”An Algorithm for Radio Resources Management in Integrated cellular/WLAN networks” by Ioannis Modeas,Alexandros Kaloxylos,Nikos Passas,Lazaros Merakos in 18 th annual International Symposium on personal,Indoor and Mobile Radio Communications(PIMRC’07)
5. Adaptive Radio resource Management based on cell load in CDMA based hierarchical cell structure” by Taesoo Kwon and Dong-Ho Cho in IEEE 2002.

RRM QoS RATs VHO