A communication network, comprising: a plurality of network interface devices (NID1-4; BS1-4) each covering a respective one of a plurality of cells, wherein each of the plurality of network interface devices communicates with communication entities in the respective cell using radio frames of the respective cell, each radio frame includes a control portion for broadcast signals and a data portion for user data, and the transmission of a first portion of the broadcast signals in the radio frames of a first one of the plurality of cells is substantially aligned with the transmission of the first portion of the broadcast signals in the radio frames of a second one of the plurality of cells, wherein (a) the first portion of the broadcast signals is transmitted more than once each radio frame, and a second portion of the broadcast signals is transmitted once each radio frame, and the radio frames of the first one of the plurality of cells are shifted in time with respect to the radio frames of the second one of the plurality of cells, or (b) the radio frames of each of the first one and the second one of the plurality of cells include a first type of radio frame and a second type of radio frame, the first type of radio frame of the first one of the plurality of cells is substantially aligned in time with the first type of radio frame of the second one of the plurality of cells, and the second type of radio frame of the first one of the plurality of cells is shifted in time with respect to the second type of radio frame of the second one of the plurality of cells, or (c) at least one of the plurality of network interface devices communicates with communication entities in the respective cell using one or more frequency carriers, each frequency carrier associated with respective radio frames, and the radio frames of a first one of the one or more frequency carriers of the at least one of the plurality of network interface devices are shifted in time with respect to the radio frames of a second one of the one or more frequency carriers of the at least one of the plurality of network interface devices. a plurality of network interface devices (NID1-4; BS1-4) each covering a respective one of a plurality of cells, wherein each of the plurality of network interface devices communicates with communication entities in the respective cell using radio frames of the respective cell, each radio frame includes a control portion for broadcast signals and a data portion for user data, and the transmission of a first portion of the broadcast signals in the radio frames of a first one of the plurality of cells is substantially aligned with the transmission of the first portion of the broadcast signals in the radio frames of a second one of the plurality of cells, wherein (a) the first portion of the broadcast signals is transmitted more than once each radio frame, and a second portion of the broadcast signals is transmitted once each radio frame, and the radio frames of the first one of the plurality of cells are shifted in time with respect to the radio frames of the second one of the plurality of cells, or (b) the radio frames of each of the first one and the second one of the plurality of cells include a first type of radio frame and a second type of radio frame, the first type of radio frame of the first one of the plurality of cells is substantially aligned in time with the first type of radio frame of the second one of the plurality of cells, and the second type of radio frame of the first one of the plurality of cells is shifted in time with respect to the second type of radio frame of the second one of the plurality of cells, or (c) at least one of the plurality of network interface devices communicates with communication entities in the respective cell using one or more frequency carriers, each frequency carrier associated with respective radio frames, and the radio frames of a first one of the one or more frequency carriers of the at least one of the plurality of network interface devices are shifted in time with respect to the radio frames of a second one of the one or more frequency carriers of the at least one of the plurality of network interface devices. (a) the first portion of the broadcast signals is transmitted more than once each radio frame, and a second portion of the broadcast signals is transmitted once each radio frame, and the radio frames of the first one of the plurality of cells are shifted in time with respect to the radio frames of the second one of the plurality of cells, or (b) the radio frames of each of the first one and the second one of the plurality of cells include a first type of radio frame and a second type of radio frame, the first type of radio frame of the first one of the plurality of cells is substantially aligned in time with the first type of radio frame of the second one of the plurality of cells, and the second type of radio frame of the first one of the plurality of cells is shifted in time with respect to the second type of radio frame of the second one of the plurality of cells, or (c) at least one of the plurality of network interface devices communicates with communication entities in the respective cell using one or more frequency carriers, each frequency carrier associated with respective radio frames, and the radio frames of a first one of the one or more frequency carriers of the at least one of the plurality of network interface devices are shifted in time with respect to the radio frames of a second one of the one or more frequency carriers of the at least one of the plurality of network interface devices.