Automatic mapping and handling PIM and other uplink interferences in digital distributed antenna systems
First Claim
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1. A method for automatic mapping and handling of noise and interference in a distributed antenna system (DAS), the method comprising:
- measuring any excessive noise and interference in one or more of the uplink cell resources matched digital filters of the DAS when one or more downlink channels of the DAS are transmitting in a zero traffic mode,wherein the DAS comprises;
a plurality of remote radio units (RRUs) in communication with mobile devices;
a central digital hub for routing and processing digital RF signals, wherein the central digital hub is coupled to the RRUs and to the base transceiver stations (BTS'"'"'s);
at least one uplink digital filter bank comprising a plurality of uplink digital filters in at least one RRU of the plurality of RRUs,wherein one or more of the uplink digital filters is matched to a corresponding cell resource, each cell resource including at least one or more signals being received from one or more of the mobile devices in an uplink direction, there being at least two separate and distinct cell resources;
comparing the measured excessive noise and interference in the uplink cell resources matched digital filters to a desired corresponding noise level,wherein the desired corresponding noise level is determined by a layout of the DAS; and
generating a mapping of the excessive noise and interference based on the comparison.
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Abstract
Disclosed herein is an algorithm that leverages the unique features and capabilities of a DCC-DAS in order to perform automatic measurements of uplink noise, PIM, and any uplink interference. Once an interference in the uplink is detected, this algorithm may automatically measure its parameters such as frequency, intensity, bandwidth, etc., and identify the source of the problem. It may automatically isolate and identify which element or cable of the DCC-DAS is the root cause of the problem or also which external source is generating the problem.
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Citations
23 Claims
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1. A method for automatic mapping and handling of noise and interference in a distributed antenna system (DAS), the method comprising:
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measuring any excessive noise and interference in one or more of the uplink cell resources matched digital filters of the DAS when one or more downlink channels of the DAS are transmitting in a zero traffic mode, wherein the DAS comprises; a plurality of remote radio units (RRUs) in communication with mobile devices; a central digital hub for routing and processing digital RF signals, wherein the central digital hub is coupled to the RRUs and to the base transceiver stations (BTS'"'"'s); at least one uplink digital filter bank comprising a plurality of uplink digital filters in at least one RRU of the plurality of RRUs, wherein one or more of the uplink digital filters is matched to a corresponding cell resource, each cell resource including at least one or more signals being received from one or more of the mobile devices in an uplink direction, there being at least two separate and distinct cell resources; comparing the measured excessive noise and interference in the uplink cell resources matched digital filters to a desired corresponding noise level, wherein the desired corresponding noise level is determined by a layout of the DAS; and generating a mapping of the excessive noise and interference based on the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 23)
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14. A distributed antenna system for coupling to a plurality of base transceiver stations (BTS'"'"'s) comprising:
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a plurality of remote radio units (RRUs) in communication with mobile devices; a central digital hub for routing and processing digital RF signals, wherein the central digital hub is coupled to the RRUs and to the BTS'"'"'s; at least one uplink digital filter bank comprising a plurality of uplink digital filters in at least one RRU of the plurality of RRUs, wherein one or more of the uplink digital filters is matched to a corresponding cell resource, each cell resource including at least one or more signals being received from one or more of the mobile devices in an uplink direction, there being at least two separate and distinct cell resources; wherein, pin one or more uplink cell resources matched digital filters of the DAS, a processor of the DAS performs the steps of; measuring any excessive noise and interference in one or more of the uplink cell resources matched digital filters of the DAS when the one or more downlink channels of the DAS are transmitting in a zero traffic mode; comparing the measured uplink cell resources excessive noise and interference in the uplink cell resources matched digital filters to a desired corresponding noise level, wherein the desired noise level is determined by a layout of the DAS; and generating a mapping of the excessive noise and interference based on the comparison. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification