A method (300, 500) of operating a peer to peer communications device to use both a wide area network uplink communications band and a wide area network downlink communications band, the method comprising: during an uplink share mode of operation, implementing (306, 526) a first transmission power control function, wherein in said uplink share mode of operation, said peer to peer communications device uses the uplink communication band of the wide area network, and transmitting (308; 528) a peer to peer signal during said uplink share mode of operation using a transmission power level determined according to said first transmission power control function into said wide area network uplink communications band; and during a downlink share mode of operation, implementing (310, 530) a second transmission power control function which is different from said first transmission power control function, wherein in said downlink share mode of operation, said peer to peer communications device uses the downlink communication band of the wide area network; and transmitting (312, 532) a peer to peer signal during said downlink share mode of operation using a transmission power level determined according to said second transmission power control function into said wide area network downlink band; and wherein the communications device determines (506, 508) a first transmission power control cap applicable to the peer to peer transmission in the uplink share mode of operation and a second transmission power control cap applicable to the peer to peer transmission in the downlink share mode of operation; wherein the communications device switches (510, 514) between uplink and down link share modes of operation based on the first and second transmission power control caps. during an uplink share mode of operation, implementing (306, 526) a first transmission power control function, wherein in said uplink share mode of operation, said peer to peer communications device uses the uplink communication band of the wide area network, and transmitting (308; 528) a peer to peer signal during said uplink share mode of operation using a transmission power level determined according to said first transmission power control function into said wide area network uplink communications band; and implementing (306, 526) a first transmission power control function, wherein in said uplink share mode of operation, said peer to peer communications device uses the uplink communication band of the wide area network, and transmitting (308; 528) a peer to peer signal during said uplink share mode of operation using a transmission power level determined according to said first transmission power control function into said wide area network uplink communications band; and during a downlink share mode of operation, implementing (310, 530) a second transmission power control function which is different from said first transmission power control function, wherein in said downlink share mode of operation, said peer to peer communications device uses the downlink communication band of the wide area network; and transmitting (312, 532) a peer to peer signal during said downlink share mode of operation using a transmission power level determined according to said second transmission power control function into said wide area network downlink band; and wherein the communications device determines (506, 508) a first transmission power control cap applicable to the peer to peer transmission in the uplink share mode of operation and a second transmission power control cap applicable to the peer to peer transmission in the downlink share mode of operation; wherein the communications device switches (510, 514) between uplink and down link share modes of operation based on the first and second transmission power control caps. implementing (310, 530) a second transmission power control function which is different from said first transmission power control function, wherein in said downlink share mode of operation, said peer to peer communications device uses the downlink communication band of the wide area network; and transmitting (312, 532) a peer to peer signal during said downlink share mode of operation using a transmission power level determined according to said second transmission power control function into said wide area network downlink band; and wherein the communications device determines (506, 508) a first transmission power control cap applicable to the peer to peer transmission in the uplink share mode of operation and a second transmission power control cap applicable to the peer to peer transmission in the downlink share mode of operation; wherein the communications device switches (510, 514) between uplink and down link share modes of operation based on the first and second transmission power control caps.