when referred to hereafter , the terminology “ wireless transmit / receive unit ( wtru )” includes but is not limited to a user equipment ( ue ), a mobile station , a fixed or mobile subscriber unit , a pager , a cellular telephone , a personal digital assistant ( pda ), a computer , or any other type of user device capable of operating in a wireless environment . when referred to hereafter , the terminology “ base station ” includes but is not limited to a node - b , a site controller , an access point ( ap ), or any other type of interfacing device capable of operating in a wireless environment . fig2 shows a wireless communication system 200 including a plurality of wtrus 210 and a e node b 220 . as shown in fig2 , the wtrus 210 are in communication with the node b 220 . although three wtrus 210 and one node b 220 are shown in fig2 , it should be noted that any combination of wireless and wired devices may be included in the wireless communication system 200 . fig3 is a functional block diagram 300 of the wtru 210 and the node b 220 of the wireless communication system 200 of fig2 . as shown in fig2 , the wtru 210 is in communication with the node b 220 and both are configured receive and transmit ies as necessary . in addition to the components that may be found in a typical wtru , the wtru 210 includes a processor 315 , a receiver 316 , a transmitter 317 , and an antenna 318 . the processor 315 is configured to process ies as necessary . the receiver 316 and the transmitter 317 are in communication with the processor 315 . the antenna 318 is in communication with both the receiver 316 and the transmitter 317 to facilitate the transmission and reception of wireless data . in addition to the components that may be found in a typical node b , the node b 220 includes a processor 325 , a receiver 326 , a transmitter 327 , and an antenna 328 . the processor 325 is configured to process ies as necessary . the receiver 326 and the transmitter 327 are in communication with the processor 325 . the antenna 328 is in communication with both the receiver 326 and the transmitter 327 to facilitate the transmission and reception of wireless data . wtru mip capability may be reported in an ie to indicate support of cmip and / or pmip . the ie may include , but is not limited to , technology information ( e . g ., orthoganol frequency division multiple access ( ofdma ), wideband cdma ( wcdma ), and the like ), supported bandwidth ( e . g ., 5 mhz , 10 mhz , 15 mhz , 20 mhz , and the like ), bit rates , and qualtiy of service ( qos ) support . in a 3gpp and non - 3gpp environment , the network and the wtru may agree on the installed mobility protocol . the network may report the support of both protocols to the wtru and the wtru may reports its capabilities to the network . if cmip and pmip are both supported protocols , a preference may be indicated by the wtru . alternatively , if the wtru does not indicate a preference , the network may indicate and confirm the preferred mode of operation . if the network supports one protocol , the network may report the supported protocol to the wtru . the wtru may report its capabilities to support the protocol . if the network supports the protocol reported by the wtru the network may confirm the operation mode . otherwise , if the network may deny service . if the wtru supports the protocol reported by the network , the wtru may confirm the operation mode . otherwise , again the network may decline service . table 3 below shows a network capability ie in accordance with one embodiment . the network capability ie includes an indication of support for cmip and / or pmip . while this may be implemented in 2 bits , one skilled in the art would realize that a fewer or greater number of bits may be utilized ; depending upon how many different types of technologies must be indicted in the ie . table 4 below shows a radio access capability ie in accordance with an embodiment . the radio access capability ie contains an indication of support for mobility protocols . for example , the ie may contain support for cmip and / or pmip . both the ms network capability access ie and the ms radio capability access ie include information that may inform the network about the multimode mobility protocol compatibilities of the wtru . the radio access capability ie carries all aspects of the eutran capabilities including , but not limited to , technology information , bandwidth information , scalability , bit rates , quality of service ( qos ), and may also include terminal type ( pda , laptop , phone ), memory size , screen size , and processing power . fig4 is a signal diagram of an attachment procedure 400 with mip capability updating between a wtru 402 , an rnc 404 , an sgsn 406 and an hlr 408 . when a wtru 402 is powered up , it first communicates via umts channels . the wtru begins a non - access stratum ( nas ) “ attach ” procedure 410 to exchange information with a core network . the wtru 402 transmits a message with a rrc_connecton_request 412 to an rnc 404 . the message may also include a packet temporary mobile subscriber id ( ptmsi ), a routing area id ( rai ) and a cause ie . the rnc 404 processes the request , performs admission control and checks the availability of resources 414 . the rnc 404 transmits a message including an rrc_connection_setup 416 with a utran radio network temporary identifier ( urtni ) to the wtru 402 . the wtru 402 may then transmit an rrc_connection_setup_complete message 418 to the rnc 404 , followed by an attach request 420 . the attach request 422 may then be forwarded by the rnc 404 to the sgsn 406 . the network_capability ie and / or the radio_access_capability ie may be included in the attach request 422 . the attach request may also include the ptmsi and an international mobile subscriber id ( imsi ). the wtru 402 , rnc 404 and sgsn 406 perform authentication and ciphering 424 , the sgsn 406 authenticates 426 the wtru 402 and the sgsn 406 sends an update 428 to the hlr 408 containing the wtru multimode capabilities . an attach accept message 430 is transmitted from the sgsn 406 to the rnc 404 . the rnc 404 forwards the attach accept 432 to the wtru 402 . although the features and elements are described in particular combinations , each feature or element can be used alone without the other features and elements or in various combinations with or without other features and elements . the methods or flow charts provided may be implemented in a computer program , software , or firmware tangibly embodied in a computer - readable storage medium for execution by a general purpose computer or a processor . examples of computer - readable storage mediums include a read only memory ( rom ), a random access memory ( ram ), a register , cache memory , semiconductor memory devices , magnetic media such as internal hard disks and removable disks , magneto - optical media , and optical media such as cd - rom disks , and digital versatile disks ( dvds ). suitable processors include , by way of example , a general purpose processor , a special purpose processor , a conventional processor , a digital signal processor ( dsp ), a plurality of microprocessors , one or more microprocessors in association with a dsp core , a controller , a microcontroller , application specific integrated circuits ( asics ), field programmable gate arrays ( fpgas ) circuits , any other type of integrated circuit ( ic ), and / or a state machine . a processor in association with software may be used to implement a radio frequency transceiver for use in a wireless transmit receive unit ( wtru ), user equipment ( ue ), terminal , base station , radio network controller ( rnc ), or any host computer . the wtru may be used in conjunction with modules , implemented in hardware and / or software , such as a camera , a video camera module , a videophone , a speakerphone , a vibration device , a speaker , a microphone , a television transceiver , a hands free headset , a keyboard , a bluetooth ® module , a frequency modulated ( fm ) radio unit , a liquid crystal display ( lcd ) display unit , an organic light - emitting diode ( oled ) display unit , a digital music player , a media player , a video game player module , an internet browser , and / or any wireless local area network ( wlan ) module .