A communication system in a cellular network, comprising: a processing system comprising a controller (22, 24, 60, 80, 124, 550, 2704) and remote units (26a..26i, 128a..128l, 302a..302p, 322a..322p, 402a..402p, 506a..506l, 2716, 2718, 2720, 2742, 2744, 2746, 2772, 2774, 2776), the remote units being configured to communicate with the controller (22, 24, 60, 80, 124, 550, 2704) and to communicate with mobile devices (18, 20, 502, 504, 506), wherein the remote units each transmit at least one common cell-ID and belong to at least one same communication cell of the cellular network; wherein the controller (22, 24, 60, 80, 124, 550, 2704) manages the remote units, wherein the remote units are deployed at different locations of a site, wherein the remote units perform at least some of the physical layer processing for an air interface used to communicate with the mobile devices (18, 20, 502, 504, 506) at the site; wherein at least part of the processing system is configured to perform operations comprising: estimating signal strength for at least some of the mobile devices (18, 20, 502, 504, 506) based on transmissions received from the mobile devices (18, 20, 502, 504, 506); determining a quantized signature vector, QSV, for each of the at least some of the mobile devices (18, 20, 502, 504, 506) based on estimates of signal strength for each of the at least some of the mobile devices (18, 20, 502, 504, 506), the estimates being received via the remote units; wherein, for a given mobile device (18, 20, 502, 504, 506), a different estimate is determined for each of the different remote units; wherein at least part of the processing system is further configured to perform operations comprising: identifying, based at least on the QSVs, at least two of the mobile devices (18, 20, 502, 504, 506) to schedule for simultaneous communication in the same communication cell on a same time-frequency resource; and scheduling the at least two of the mobile devices (18, 20, 502, 504, 506) for the simultaneous communication in the same communication cell on the same time-frequency resource, wherein each of the at least two mobile devices (18, 20, 502, 504, 506) use at least one of the remote units for the simultaneous communication. a processing system comprising a controller (22, 24, 60, 80, 124, 550, 2704) and remote units (26a..26i, 128a..128l, 302a..302p, 322a..322p, 402a..402p, 506a..506l, 2716, 2718, 2720, 2742, 2744, 2746, 2772, 2774, 2776), the remote units being configured to communicate with the controller (22, 24, 60, 80, 124, 550, 2704) and to communicate with mobile devices (18, 20, 502, 504, 506), wherein the remote units each transmit at least one common cell-ID and belong to at least one same communication cell of the cellular network; wherein the controller (22, 24, 60, 80, 124, 550, 2704) manages the remote units, wherein the remote units are deployed at different locations of a site, wherein the remote units perform at least some of the physical layer processing for an air interface used to communicate with the mobile devices (18, 20, 502, 504, 506) at the site; wherein at least part of the processing system is configured to perform operations comprising: estimating signal strength for at least some of the mobile devices (18, 20, 502, 504, 506) based on transmissions received from the mobile devices (18, 20, 502, 504, 506); determining a quantized signature vector, QSV, for each of the at least some of the mobile devices (18, 20, 502, 504, 506) based on estimates of signal strength for each of the at least some of the mobile devices (18, 20, 502, 504, 506), the estimates being received via the remote units; wherein, for a given mobile device (18, 20, 502, 504, 506), a different estimate is determined for each of the different remote units; estimating signal strength for at least some of the mobile devices (18, 20, 502, 504, 506) based on transmissions received from the mobile devices (18, 20, 502, 504, 506); determining a quantized signature vector, QSV, for each of the at least some of the mobile devices (18, 20, 502, 504, 506) based on estimates of signal strength for each of the at least some of the mobile devices (18, 20, 502, 504, 506), the estimates being received via the remote units; wherein, for a given mobile device (18, 20, 502, 504, 506), a different estimate is determined for each of the different remote units; wherein at least part of the processing system is further configured to perform operations comprising: identifying, based at least on the QSVs, at least two of the mobile devices (18, 20, 502, 504, 506) to schedule for simultaneous communication in the same communication cell on a same time-frequency resource; and scheduling the at least two of the mobile devices (18, 20, 502, 504, 506) for the simultaneous communication in the same communication cell on the same time-frequency resource, wherein each of the at least two mobile devices (18, 20, 502, 504, 506) use at least one of the remote units for the simultaneous communication. identifying, based at least on the QSVs, at least two of the mobile devices (18, 20, 502, 504, 506) to schedule for simultaneous communication in the same communication cell on a same time-frequency resource; and scheduling the at least two of the mobile devices (18, 20, 502, 504, 506) for the simultaneous communication in the same communication cell on the same time-frequency resource, wherein each of the at least two mobile devices (18, 20, 502, 504, 506) use at least one of the remote units for the simultaneous communication.