System for providing a continuous communication link with a symbol reading device

Abstract

The disclosure embraces a system and method for providing a continuous communication link between a server computer and a symbol reading device, and a novel symbol reading device adapted for use in such a system. The system greatly simplifies the remote management, diagnostic evaluation, and monitoring of symbol reading devices, especially those devices connected to host devices that are not PC-based or running a complete operating system.

Description

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims the benefit of U.S. patent application Ser. No. 13/902,242 for a System for Providing a Continuous Communication Link with a Symbol Reading Device filed May 24, 2013 (and published Nov. 27, 2014 as U.S. Patent Application Publication No. 2014/0351317), now U.S. Pat. No. 9,930,142. Each of the foregoing patent application, patent publication, and patent is hereby incorporated by reference in its entirety.

BACKGROUND

Field of Disclosure

The present disclosure generally relates to information systems. More particularly, the present disclosure relates to a system for providing a continuous communication link with a symbol reading device, and a symbol reading device adapted for use in such a system.

BRIEF OVERVIEW OF THE STATE OF THE ART

A symbol reading device (e.g., barcode scanner, barcode reader, RFID reader) is a specialized input device for certain data systems commonly used by retailers, industrial businesses, and other businesses having a need to manage large amounts of inventory. Symbol reading devices are often employed to read barcodes. A barcode is a machine-readable representation of information in a graphic format. The most familiar of these graphic symbols is a series of parallel bars and spaces of varying widths, which format gave rise to the term “barcode.” The adoption of the Universal Product Code (UPC) version of barcode technology in 1973 quickly led to a revolution in logistics by obviating the need for manual entry of long number strings.

Most barcode scanners operate by projecting light from an LED or a laser onto the printed barcode, and then detecting the level of reflected light as the light beam sweeps across the barcode. Using this technique, the barcode scanner is able to distinguish between dark areas and light areas on the barcode. The barcode scanner can determine the width of each bar or white space and then decode the symbol to determine the represented data.

Although the basic concept behind barcode scanning technology has remained constant, the techniques employed continue to evolve. Recent trends include the widespread use of 2D barcodes (i.e., matrix codes), which provide for the representation of data in two dimensions. The QR Code is an example of a 2D barcode in wide use today, especially in the area of interactive marketing.

Typically, the barcode scanner transmits the data that it decodes from reading the barcode to a host device, which host device is configured to process the data in some useful way. In the retail context, where the barcode scanner is used in conjunction with the sale of products to the consumer, these host devices and their accompanying barcode scanners are often referred to as point-of-sale (POS) systems. The most ubiquitous example of the point-of-sale system is the checkout register at a supermarket, where an omni-directional barcode scanner reads the UPC code on grocery purchases. The barcode scanner passes the UPC code associated with each product along to the cash register, which then looks up the price associated with each product code. The communication link between the barcode scanner and the host device is often either an RS-232 serial connection or a universal serial bus (USB) connection.

The useful life of barcode scanners can be extended and functionality enhanced by updating the barcode scanner's software (e.g., firmware). In situations where the host device features a full-featured operating system capable of running software (e.g., Microsoft WINDOWS®) adapted to update the barcode scanner's firmware, a system administrator can update the firmware via the host device, either directly or through a network connection to the host device. Many host systems are not capable of directly supporting an upgrade of the barcode scanner firmware. Low-end retail host devices, such as certain electronic cash registers, may not be PC-based or may not be running complete operating systems. In addition, certain factors may prohibit a business from providing a network connection to certain host devices, making it impossible to remotely upgrade the barcode scanner firmware. Because these host devices cannot provide the necessary interface to upgrade the barcode scanner firmware, when performing system maintenance, it is necessary to disconnect the barcode scanner from the host device and then reconnect the barcode scanner to a suitable upgrade system, such as a PC-based laptop computer. Once the upgrade of the firmware is complete, the upgrade system is disconnected and the communication link between the barcode scanner and the host device is re-established.

The problem with this approach to upgrading a barcode scanner's firmware is that it is time-consuming, labor intensive, and results in the point-of-sale system, for example, being offline for the duration of the upgrade process. In environments employing many host device-barcode scanner pairings, the costs and delays brought about by this labor-intensive upgrade technique can be quite burdensome on a business.

What is needed is a system for providing communication to a symbol reading device, such as a barcode reader, that allows continuous access to the symbol reading device through a server computer even in situations where the host device is incapable of providing access to the symbol reading device for purposes of upgrading the symbol reading device's firmware. A system that provided an additional means of communicating with the symbol reading device beyond the communication link with the host device would not only allow for remote upgrading of the symbol reading device's firmware but would allow for the transfer of data from the symbol reading device to systems other than the host device for additional data processing or data collection purposes.

OBJECTS OF PRESENT DISCLOSURE

A primary object of the present disclosure is to provide a system for providing a continuous communication link with a symbol reading device.

Another object of the present disclosure is to provide a system for providing a continuous communication link with a symbol reading device wherein a continuous communication link exists between the symbol reading device and a server computer and a continuous communication link exists between the symbol reading device and the host device.

Another object of the present disclosure is to provide a system for providing a continuous communication link with a symbol reading device wherein the symbol reading device has a communications module having a first interface for communicating with a host device and a second interface for communicating with a server computer.

Another object of the present disclosure is to provide a system for providing a continuous communication link with a symbol reading device wherein the symbol reading device's firmware may be updated without the need for disconnecting the symbol reading device from the host device even in situations where the host device is not suitable for providing access to the symbol reading device for the purpose of upgrading the firmware.

Another object of the present disclosure is to provide a system for providing a continuous communication link with a symbol reading device that allows for the upgrading of the symbol reading device's firmware with a reduced amount of time, labor and downtime when compared with conventional upgrade techniques.

Another object of the present disclosure is to provide a symbol reading device having the capability of separately communicating with a host device and a server computer.

Another object of the present disclosure is to provide a system whereby a server computer can collect data from a symbol reading device while the symbol reading device remains in continuous communication with a host device.

Further objects of the present disclosure will become more apparently understood hereinafter and in the claims appended hereto.

BRIEF DESCRIPTION OF THE DRAWINGS

To more fully understand the objects, the following detailed description of the illustrative embodiments should be read in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic block diagram of an exemplary system for providing a continuous communication link with a symbol reading device according to the present disclosure.

FIG. 2 is a schematic block diagram of an exemplary system for providing a continuous communication link with a symbol reading device according to the present disclosure.

FIG. 3 is a schematic block diagram of an exemplary system for providing a continuous communication link with a symbol reading device according to the present disclosure.

FIG. 4 is a schematic block diagram of an exemplary symbol reading device according to the present disclosure.

DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENTS

Referring to the figures in the accompanying drawings, the illustrative embodiments of the system for providing a continuous communication link with a symbol reading device, and the symbol reading device according to the present disclosure will be described in great detail, wherein like elements will be indicated using like reference numerals.

It will be understood that the system for providing a continuous communication link with a symbol reading device of the illustrative embodiments may be modified in a variety of ways which will become readily apparent to those skilled in the art having the benefit of the novel teachings disclosed herein. All such modifications and variations of the illustrative embodiments thereof shall be deemed to be within the scope of the claims appended hereto.

In one aspect, the present disclosure embraces a system for providing a continuous communication link with a symbol reading device. The system includes a symbol reading device having a controller module. The system also includes a communications module in communication with the controller module of the symbol reading device. The system further includes a host device in communication with the communications module and a server computer in communication with the communications module.

In another aspect, the present disclosure embraces a symbol reading device. The symbol reading device according to the present disclosure includes a controller module for converting a symbol into data; a communications module for transmitting data, the communications module in communication with the controller module; wherein the communications module has a first interface for communicating with a host device and a second interface for communicating with a server computer.

Referring now to FIG. 1, the system 100 includes a symbol reading device 105. It will be understood that the symbol reading device may be any one of the various types of device intended for reading (e.g., decoding, interpreting) symbols (e.g., barcodes, RFID tags). Such symbol reading device 105 may be a pen-type barcode reader (e.g., wand barcode reader), laser barcode scanners, CCD barcode readers, camera-based barcode readers, omni-directional barcode scanners, RFID readers, or any similar device. It will be further understood that the term “barcode” is intended to broadly encompass insignia used to represent data, including various types of linear barcodes (i.e., 1D barcodes) and matrix barcodes (i.e., 2D barcodes). The symbol reading device 105 includes a controller module 110 that decodes the symbol, for example by converting readings of light reflected off a barcode into data (e.g., a product identification number, a shipment number, an account number, etc.).

The system 100 also includes a communications module 115. The communications module 115 is in communication with the controller module 110 by means suitable for allowing data to be transmitted from the controller module 110 to the communications module 115. Typically, the communications module 115 will be integral with the symbol reading device. The communications module 115 is adapted to communicate with a host device 120. It will be understood that the term “host device” is intended to broadly encompass the great variety of devices adapted to communicate with a symbol reading device 105. Examples of such host devices include, without limitation, electronic cash registers, inventory management systems, and inventory control systems. Typically, the communications module 115 is connected to the host device 120 via an RS-232 serial connection or a universal serial bus (USB) connection. The communications module 115 may be communicatively connected to the host device 120 in other ways, including by a wireless communication link (e.g., wireless radio (e.g., ZIGBEE, BLUETOOTH, WI-FI) and infrared transmissions).

The system 100 also includes a server computer 125. The server computer 125 is in communication with the communications module 115. The term server computer 125 is intended to be used broadly to encompass any computer or network of computers capable of running a software application adapted to upload information (e.g., updates to firmware) to the symbol reading device 105, and/or adapted to process information received from the symbol reading device 105. The communication link between the server computer 125 and the symbol reading device 105 may be established by various means, including by wired and wireless connections. This communication link between the server computer 125 and the symbol reading device 105 provides access to the scanning device 105 without the need to interrupt the communication link between the symbol reading device 105 and the host device 120. It will be understood that references in the disclosure to a continuous communication link are intended to indicate the existence of a continuing physical connection (e.g., wired or wireless connection) enabling communication (e.g., enabling the exchange of information on an as-needed basis). Such references are not intended to suggest that the system requires information to be communicated among system components at all times. Indeed, one of the advantages of the system 100 is that it allows for communication between the server computer 125 and the symbol reading device 105 as frequently or as infrequently as may be needed.

As illustrated in FIG. 2, in one embodiment, the communications module 115 comprises a first interface 116 for communicating with the host device 120 and a second interface 117 for communicating with the server computer 125. The first interface 116 may be a separate component from the second interface 117 or it may be integral with the second interface 117. Typically, the first interface 116 is an RS-232 serial interface or a USB interface. Alternatively, the first interface 116 may be a wireless interface of the type that is well-known to a person of ordinary skill in the art.

The communication link between the symbol reading device 105 and the server computer 125 may be wired or wireless. Accordingly, the second interface 117 may comprise a wired technology interface (e.g., cabled Ethernet) or a wireless technology interface. A wireless connection may be advantageous in circumstances where running cable from the scanning device would be difficult or overly costly due to the nature of the building infrastructure or the distances involved, or when the use of cabling would inhibit the use of the symbol reading device 105 (e.g., when using a handheld device). For example, the second interface 117 may comprise a wireless personal area network interface (e.g., a BLUETOOTH interface or a ZIGBEE interface) allowing the symbol reading device 105 to communicate with the server computer 125 via a radio connection using a BLUETOOTH or ZIGBEE standard. A BLUETOOTH connection may also be advantageous because that standard allows for peer-to-peer connections between multiple devices in the personal area network. In this way, multiple symbol reading devices 105 could be wirelessly linked in a personal area network that is in communication with the system 100 through a master device. Alternatively, the second interface 117 may comprise a wireless local area network interface (WLAN) (e.g., WI-FI or 802.11x interface) or a wireless wide area network interface (WWAN) (e.g., GSM, CDMA, GPAS). It will be appreciated by one of ordinary skill in the art that symbol reading devices 105 connected to a server computer 125 using any of these techniques will be accessible by the server computer 125 and any computer (e.g., client computer) networked to the server computer 125. If the server computer 125 is connected to the Internet, then the symbol reading device may be assigned an Internet Protocol (IP) address, making it a uniquely identifiable node on the network. Therefore, the symbol reading device 105 can be remotely accessed by any other authorized computer on the network via the server computer 125. It will be appreciated that those systems 100 that incorporate many (e.g., hundreds) individual symbol reading devices 105 will particularly benefit from the remote access via a server computer 125, which remote access allows for much faster updating of these symbol reading devices 105 via the network than the traditional technique requiring the symbol reading device 105 to be disconnected from the host device 120 before any updating of the firmware can commence.

As depicted in FIG. 2, in one embodiment the communication link between the first interface 116 and the host device 120 is parallel to the communication link between the second interface 117 and the server computer 125. In this configuration the system 100 allows the symbol reading device 105 to transmit one set of data to the host device 120 and another set of data to the server computer 125. For example, the communication link to the host device 120 might typically carry only decoded barcode data transmissions, whereas the communication link to the server computer 120 might carry other types of data, including number of trigger pulls, time to decode, barcode quality or images of scanned barcodes.

FIG. 3 depicts an alternative configuration of the system 100 according to the present disclosure. In this configuration, the first interface 116 and the second interface 117 are connected in a serial fashion to the controller module (i.e., the second interface 117 and the second interface 117 are in shared communication with the controller module 110). In this configuration, the second interface 117 receives data from the controller module 110 and either transmits the data to the server computer 125 or passes the data through to the first interface 116 to be transmitted to the host device 120, or does both. This configuration might be advantageous in a system 100 where there is a cabled connection (e.g., RS-232 connection) between the symbol reading device 105 and the host device 120, and the second interface 117 is a wireless radio interface positioned within the cabling (e.g., a wireless radio pod incorporated into the cabling) connecting the symbol reading device 105 and the host device 120.

Turning now to FIG. 4, the disclosure alternatively embraces a symbol reading device 105 adapted for use with the system 100 according to the present disclosure. The symbol reading device 105 includes a controller module 110 for converting a symbol into data. The symbol reading device 105 also includes a communications module 115 for transmitting data. The communications module 115 is in communication with the controller module 110. The communication module 115 comprises a first interface 116 for communicating with a host device and a second interface 117 for communicating with a server computer 125. The second interface 117 may be wired (e.g., Ethernet network interface) or wireless (e.g., wireless personal area network interface, wireless local area network interface, or wireless wide area network interface).

To supplement the present disclosure, this application incorporates entirely by reference the following patents, patent application publications, and patent applications: U.S. Pat. No. 6,832,725; U.S. Pat. No. 7,159,783; U.S. Pat. No. 7,413,127; U.S. Pat. No. 8,390,909; U.S. Pat. No. 8,294,969; U.S. Pat. No. 8,408,469; U.S. Pat. No. 8,408,468; U.S. Pat. No. 8,381,979; U.S. Pat. No. 8,408,464; U.S. Pat. No. 8,317,105; U.S. Pat. No. 8,366,005; U.S. Pat. No. 8,424,768; U.S. Pat. No. 8,322,622; U.S. Pat. No. 8,371,507; U.S. Pat. No. 8,376,233; U.S. Pat. No. 8,457,013; U.S. Pat. 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No. 13/897,512 for a Laser Scanning Code Symbol Reading System Providing Improved Control over the Length and Intensity Characteristics of a Laser Scan Line Projected Therefrom Using Laser Source Blanking Control, filed May 20, 2013 (Brady et al.); and U.S. patent application Ser. No. 13/897,634 for a Laser Scanning Code Symbol Reading System Employing Programmable Decode Time-Window Filtering, filed May 20, 2013 (Wilz, Sr. et al.).

In the specification and figures, typical embodiments of the invention have been disclosed. The present invention is not limited to such exemplary embodiments. Unless otherwise noted, specific terms have been used in a generic and descriptive sense and not for purposes of limitation.

Claims

1. A symbol reading device, comprising: a controller;a first interface in data communication with the controller, wherein the first interface is adapted to establish a first communication link to communicate symbol data with a host device, and wherein the symbol data comprises data, decoded by the controller, that is representative of a captured reading of light reflected by a barcode; anda second interface in data communication with the controller, wherein the second interface is adapted to establish a second communication link to communicate with a server computer, wherein the second communication link is operable to communicate firmware communications data for updating firmware of the symbol reading device, wherein the first communication link is parallel to the second communication link, andwherein the symbol reading device prevents firmware communications data transmitted via the second communication link between the server computer and the second interface from interrupting data communications transmitted via the first communication link between the host device and the first interface.

2. The symbol reading device of claim 1, wherein the second interface comprises a wireless personal area network interface.

3. The symbol reading device of claim 1, wherein the second interface comprises a wireless local area network interface.

4. The symbol reading device of claim 1, wherein the second interface comprises a wireless wide area network interface.

5. The symbol reading device of claim 1, wherein the first interface comprises an RS-232 serial interface.

6. The symbol reading device of claim 1, wherein the first interface comprises a universal serial bus interface.

7. The symbol reading device of claim 1, wherein the first interface comprises an RS-232 serial interface and the second interface comprises a wireless personal area network interface.

8. The symbol reading device of claim 1, wherein the first interface comprises an RS-232 serial interface and the second interface comprises a wireless local area network interface.

9. A system, comprising: a symbol reading device comprising a first interface and a second interface;a host device in communication with the first interface via a first communication link to receive, from the symbol reading device, data decoded by the controller, that is representative of a captured reading of light reflected by a barcode; anda server computer in communication with the second interface via a second communication link for updating firmware of the symbol reading device, wherein the first communication link is parallel to the second communication link, andwherein the symbol reading device prevents communications transmitted via the second communication link from interrupting communications transmitted via the first communication link.

10. The system of claim 9, wherein the second interface comprises a wireless personal area network interface.

11. The system of claim 9, wherein the second interface comprises a wireless local area network interface.

12. The system of claim 9, wherein the second interface comprises a wireless wide area network interface.

13. The system of claim 9, wherein the first interface comprises an RS-232 serial interface.

14. The system of claim 9, wherein the first interface comprises a universal serial bus interface.

15. The system of claim 9, wherein the first interface comprises an RS-232 serial interface and the second interface comprises a wireless personal area network interface.

16. The system of claim 9, wherein the first interface comprises an RS-232 serial interface and the second interface comprises a wireless local area network interface.

17. A symbol reading device, comprising: a controller; anda first interface in data communication with the controller, wherein the first interface is adapted to establish a first communication link to communicate symbol data with a host device and wherein the symbol data comprises data, decoded by the controller, that is representative of a captured reading of light reflected by a barcode; anda second interface in data communication with the controller, wherein the second interface is adapted to establish a second communication link to communicate with a server computer, wherein the second communication link is operable to communicate firmware communications data for updating firmware of the symbol reading device, wherein the first communication link is parallel to the second communication link, andwherein the symbol reading device prevents communications transmitted via the second interface from interrupting communications transmitted via the first interface.

18. The symbol reading device of claim 17, wherein the second interface comprises a wireless personal area network interface.

19. The symbol reading device of claim 17, wherein the second interface comprises a wireless local area network interface.

20. The symbol reading device of claim 17, wherein the second interface comprises a wireless wide area network interface.