Sampling and Reporting of Signal Strength with Time and Location Information
Original Publication Date: 2003-Sep-16
Included in the Prior Art Database: 2003-Sep-16
Soren K. Lundsgaard: AUTHOR [+2]
This paper describes a system for measuring signal strength, location, and timestamps on mobile radios (including public safety or cellular phones) and for transmitting this information to a central location. This information can then be analyzed and used to improve coverage or mitigate interference issues in these types of systems
Sampling and Reporting of Signal Strength with Time and Location Information[MP1]
By Soren K. Lundsgaard, Kristin Smith
This paper describes a system for measuring signal strength, location, and timestamps on mobile radios (including public safety or cellular phones) and for transmitting this information to a central location. This information can then be analyzed and used to improve coverage or mitigate interference issues in these types of systems.
Ongoing measurement, estimation of coverage, and resolution of coverage issues in wireless networks such as public safety and cellular networks are expensive and time consuming. Existing tools for determining network coverage are approximations that rely on sampled field data from test equipment to verify and improve coverage models.
This publication describes a method to move data sampling and collection to GPS enabled Mobile Subscribers (MS’s) and network infrastructure using actual field equipment in the field environment without affecting the field user.
New functionality assigned to the MS may include recording datasets (such as, for instance signal strength, bit error rate (BER) measurements, time, velocity, location, etc.) and transmitting that information to the network infrastructure when queried for it.
One example of a process to retrieve the information recorded by the MS may, for instance, include the steps of:
1. A Customer making a request from the Zone Management System (ZMS) for the above-referenced information, wherein the ZMS may contact the Zone Controller (ZC) to schedule a procedure for obtaining the information;
2. The ZC, in response to the ZMS, sending the request if traffic levels are low;
3. In one example request for information, the ZC sending an Outbound Signal Word (OSW) "MSs! Prepare for Bit Error Rate (BER) test!";
4. Sending a well-known bit pattern out over a designated base station;
5. For MSs that successfully received the OSW message, "reading" the BER test string and recording the number of bits they did receive which do not match the well known bit pattern, in addition “reading” the MS’s location and other information, including MS ID, BER, Base Station ID, Signal Strength, Location, Battery Level, etc.;
6. The ZC collecting this and other coverage data from individual MSs and forwarding the information to the ZMS; and
7. The ZMS presenting this data to the customer.
New functionality assigned to Zone Controllers may include:
1. The ability to request data from MSs;
2. Storeing and forwarding received data from MSs to the Zone Management System;
3. Initiating bi-directional tests with MSs;
4. Receiving results from the MSs;
5. Forwarding the results to the Zone Management System; and
6. Monitoring traffic levels of the system and postponing tests until traffic levels are low.
New functionality assigned to the Zone Management System may include:
1. Configuring reports to poll radios for test data (e.g., frequency o...