Abstract: A method for forwarding data, a load balancing device, a computer readable storage medium, and a data transmission system. An implementation of the method includes: obtaining a data packet sent by a client, and extracting an actual session parameter from the data packet; in response to the actual session parameter being an unrecorded session parameter, reading information from a preset field address constituting a packet header of the data packet; wherein a preset field corresponding to the preset field address is configured to record information used to determine a target server parameter; in response to determining that the information read from the preset field address is not empty, determining, based on target information read from the preset field address, the target server parameter as a client communication object; and forwarding the data packet to a target server corresponding to the target server parameter.

Abstract: Techniques for improving positioning performance using categorization of navigation signal environment are described. A mobile device can receive signal environment data. The signal environment data can represent multiple geographic areas. The signal environment data includes a respective signal environment category for each geographic area, each signal environment category corresponding to a degree to which geographic features in the respective geographic area affect reception of the navigation signals. The mobile device can determine that the mobile device is located in a particular geographic area represented in the signal environment data. The mobile device can then select a set of one or more rules for aiding location estimation. The set of one or more rules can correspond to the signal environment category of the geographic area. The mobile device can estimate a location of the mobile device using the navigation signals and under the set of one more rules.