Method and apparatus to maintain network coverage when using a transport media to communicate with a remote antenna
First Claim
1. A method for use in a cellular communications system having a centralized radio processing portion (hotel) in communication with a plurality of remote air interface radio portions (RH) over a transport medium, the method comprising:
- in the centralized radio processing portion, compensating for a fixed delay associated with the transport medium coupling the centralized radio processing portion and one of the remote air interface radio portions in evaluating a time period corresponding to a variable delay between a transmission by a mobile station and receipt of the transmission by the centralized radio processing portion, the mobile station communicating with the one of air interface radio portions, the transmission being received by the centralized radio processing portion from the one of the remote air interface radio portions;
wherein the evaluating is for synchronizing calls by adjusting a transmission timing of the mobile station according to the evaluation of the time period corresponding to the variable delay; and
wherein the compensating for the fixed delay includes subtracting out the fixed delay in a calculation of the time period corresponding to the variable delay.
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Accused Products
Abstract
In a cellular communications system having a centralized radio processing portion (a base station hotel) in communication with a plurality of remote air interface radio portions (or radio heads) over a transport medium, the centralized radio processing portion compensates for a fixed delay associated with the transport medium coupling the centralized radio processing portion and one of the remote air interface radio portions when evaluating a time period corresponding to a variable delay between transmission by a mobile in communication with the one of air interface radio portions and receipt of the transmission by the centralized radio processing portion. The variable delay may relate to time out periods or time slot synchronization.
84 Citations
19 Claims
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1. A method for use in a cellular communications system having a centralized radio processing portion (hotel) in communication with a plurality of remote air interface radio portions (RH) over a transport medium, the method comprising:
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in the centralized radio processing portion, compensating for a fixed delay associated with the transport medium coupling the centralized radio processing portion and one of the remote air interface radio portions in evaluating a time period corresponding to a variable delay between a transmission by a mobile station and receipt of the transmission by the centralized radio processing portion, the mobile station communicating with the one of air interface radio portions, the transmission being received by the centralized radio processing portion from the one of the remote air interface radio portions; wherein the evaluating is for synchronizing calls by adjusting a transmission timing of the mobile station according to the evaluation of the time period corresponding to the variable delay; and wherein the compensating for the fixed delay includes subtracting out the fixed delay in a calculation of the time period corresponding to the variable delay. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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2. A method for use in a cellular communications system having a centralized radio processing portion (hotel) in communication with a plurality of remote air interface radio portions (RH) over a transport medium, the method comprising:
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in the centralized radio processing portion, compensating for a fixed delay associated with the transport medium coupling the centralized radio processing portion and one of the remote air interface radio portions in evaluating a time period corresponding to a variable delay between a transmission by a mobile station and receipt of the transmission by the centralized radio processing portion, the mobile station communicating with the one of air interface radio portions, the transmission being received by the centralized radio processing portion from the one of the remote air interface radio portions; and wherein the compensating comprises increasing a first time period corresponding to receipt of the transmission at the one of the remote air interface radio portions, by a second time period corresponding to the fixed delay. - View Dependent Claims (3, 4, 5)
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12. A cellular communication system comprising:
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a host processing part coupled to receive a communication over a transport medium from a remote air interface part, the host processing part configured to evaluate a time interval between transmission by a mobile station in communication with the remote air interface part and receipt of the transmission at the host processing part, the host processing part configured to compensate for a fixed delay associated with the transport medium coupling the host processing part and the remote air interface part in evaluating the time interval; wherein the host processing part is further coupled to receive respective communications over the transport medium from a plurality of other remote air interface parts, each of the other remote air interface parts having respective fixed delays over the transport medium different from the fixed delay associated with the remote air interface part; wherein the host processing part is configured to evaluate the time interval to synchronize calls by adjusting a transmission timing of the mobile station according to the evaluation of the time interval; and wherein the host processing part is configured to compensate for the fixed delay by subtracting out the fixed delay to evaluate the time interval. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification