KR101110348B1 - Base station, communication method by the base station, and machine-readable medium - Google Patents

Abstract

A base station, a communication method, and a computer readable recording medium for a wireless communication system are provided. The base station includes a receiving module, a process module and a transmitting module. The receiving module receives a first request message from a first mobile device having at least one first sequence and receives a second request message from a second mobile device having at least one second sequence. The process module determines whether the at least one first sequence is the same as the at least one second sequence. The transmission module transmits a response message according to the determination result. Finally, the first and second mobile devices determine whether to transmit the first and second data according to the response message, respectively.

Wireless, communications, OFDM, OFDMA

Description

BASE STATION, COMMUNICATION METHOD BY THE BASE STATION, AND MACHINE-READABLE MEDIUM

The present invention relates to a base station for a wireless communication system, a method of communication of a base station and a computer-readable recording medium; More specifically, the present invention relates to a base station for an Orthogonal Frequency Division Multiple Access (OFDMA) wireless communication system, a method of communication of the base station, and a computer-readable recording medium.

With the recent widespread use of wireless communication, mobile communication devices owned by the general public are more and more varied and diverse. However, Global System for Mobile Communications (GSM), Wideband Code Division Multiple Access (WCDMA), General Packet Radio Service (GPRS), General Packet Radio Service (PHS), Wireless Fidelity (WiFi), Worldwide Interoperability for Microwave Access (WiMAX) The mobile communication devices currently available in the market, such as those employing Long Term Evolution (LTE), are all base stations for providing wireless voice, image, data communication and mobile device location services. Based on.

In recent years, due to the high demand for bandwidth in wireless networks, the WiMAX (also known as IEEE 902.16) standard and GSM based on the Internet Protocol (IP) for wireless communication network providers and producers of wireless communication devices. The LTE technology based on has been the focus of development. The WiMAX standard and the LTE technology are both wireless transmission specifications that employ a transmission mode of Orthogonal Frequency Division Multiplexing (OFDM) / Orthogonal Frequency Division Multiplexing Access (OFDMA).

More specifically, as a wireless transmission mode incorporating time division multiplexing (TDM) and frequency division multiplexing (FDM), OFDM / OFDMA is used to provide data transmission for other users or to transmit data for other purposes. Subcarriers are used.

To reduce dead zones of communication, to improve system capacity, and to more efficiently use radio bandwidth resources of a wireless communication system, the use of macro base stations In addition to the original deployment, there has been an increasing interest in femtocell BSs. The femtocell BS technology has been considered as one of the next generation core technologies of wireless communication. On the one hand, the WiMAX standard and the LTE technology are expected to support the femtocell BS technology.

Since wireless communication is achieved by sending messages over radio waves in the air, the communication environment is rather complex and easy to interfere. Moreover, two different kinds of wireless communication systems (e.g., one adopts the WiMAX standard and the other adopts the LTE technology) are placed too far apart with an increased number of BSs between the individual BSs. When in close proximity, the two wireless communication systems will interfere with each other's signals resulting in a drop in communication quality. In addition, the high placement density of the BSs further makes it difficult to allocate radio bandwidth resources and reduces the overall utilization efficiency of the radio bandwidth resources of the wireless communication system.

On the other hand, the femtocell BS is used to perform wireless communication within a small range. The number and placement density of the BSs may be greatly increased. Moreover, the femtocell BSs are often deployed by the user and use a wired network as a medium for its backhaul data transmission, thus allowing fast data transfer between the BSs for connection and control purposes. There is a lack of media. All of this makes interference management and power control of the femtocell BSs more difficult.

Thus, it is possible to alleviate or eliminate the interference between individual BSs or femtocell BSs-due to too close distances between them-without modifying the hardware architecture of the existing wireless communication system, and to achieve full spectrum efficiency, data transmission. There must still be efforts by wireless communication network providers and producers of wireless communication devices to meet the intense demands of the general public for solutions that may also take into account the speed and computational burden of the wireless communication system.

It is an object of the present invention to provide a base station for a wireless communication system.

Another object of the present invention is to provide a communication method for the wireless communication system.

The wireless communication system includes a server device, base stations (BS) and a plurality of mobile devices. The mobile devices include a first mobile device having first datum and a second mobile device having second datum. The server device is electrically connected to the base station and to a base station different from the base station. The first mobile device is wirelessly connected to the base station, and the second mobile device is wirelessly connected to the other base station. The first and second mobile devices are both located within the wireless communication coverage of the base station and the wireless communication coverage of the other base station.

In order to achieve the object of the present invention, the base station of the present invention comprises a receiving module, a process module and a transmitting module. The receiving module receives a mode switch message transmitted by the server device according to the usage of radio bandwidth resources of the wireless communication system. The process module switches the base station from control mode to uncontrolled mode in accordance with the mode switch message. The receiving module additionally receives a first request message sent by the first mobile device having at least one first sequence and a second request sent by the second mobile device having at least one second sequence. Receive the message. The process module additionally determines whether the at least one first sequence and the at least one second sequence match the same sub-block. The transmission module transmits a response message according to the determination result of the process module. Finally, the first mobile device determines whether to transmit the first data according to the response message.

The communication method may further comprise: enabling a receiving module to receive a mode switch message sent by the server device according to the usage of radio bandwidth resources of the wireless communication system; Enabling a process module to switch the base station from a control mode to an uncontrolled mode in accordance with the mode switch message; Enabling the receiving module to receive a first request message that includes at least one first sequence sent by the first mobile device; Enabling the receiving module to receive a second request message that includes at least one second sequence sent by the second mobile device; Enabling the process module to determine whether the at least one first sequence and the at least one second sequence match the same sub-block; And enabling the transmission module to transmit a response message according to the determination result of the process module. Finally, the first mobile device determines whether to transmit the first data according to the response message.

In order to achieve the above object, the present invention provides a computer program product comprising a tangible computer-readable recording medium having executable codes for performing the above-mentioned communication method. When the executable codes are loaded and executed through a computer to the base station, the above-described communication method can be achieved.

As described above, the base station of the present invention, the method of communication of the base station, and thus the computer-readable recording medium allocates radio bandwidth resources of the wireless communication system according to request messages of individual mobile devices. And by reallocating the radio bandwidth resources to account for potential collisions, thereby reducing signal interference between base stations of the wireless communication system. According to this method, when the base stations are too close to each other or have a high density, the problem of two kinds of base stations interfering with each other can effectively avoid modifying the existing hardware structure of the wireless communication system. I can solve it.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the accompanying drawings.

In the present specification, when one component 'transmits' data or a signal to another component, the component may directly transmit the data or signal to the other component, and at least one other component. Means that the data or signal can be transmitted to the other component through the element.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

The present invention relates to a base station included in a wireless communication system and a communication method using the base station. The wireless communication system may be a WiMAX or LTE wireless communication system using an OFDM / OFDMA communication mode. However, although the embodiment of the present invention will be described with reference to the communication system as an example, the scope of the present invention is not limited thereto.

Hereinafter, a first embodiment according to the present invention will be described with reference to FIGS. 1A to 1G. 1A is a block diagram of a wireless communication system 1 according to an embodiment of the present invention. Referring to FIG. 1, the wireless communication system 1 includes a plurality of base stations 11, 13, a plurality of mobile devices 15, 17, 19, and a server device 18.

The plurality of base stations 11, 13 may be macro base stations and / or femtocell base stations. The server device 18 may be a server and / or a router for allocating a radio bandwidth resource 2 of the wireless communication system 1.

For simplicity, the base station 11 and the base station 13 will be described as an example. The plurality of mobile devices 15, 17, 19 may be smart phones, PDAs, notebooks having a wireless communication function. For simplicity, the first mobile device 15, the second mobile device 17, and the third mobile device 19 will be described as an example.

As described above, the base station 11 has a first wireless communication coverage 10, and the base station 13 has a second communication coverage 12. In addition, both the base station 11 and the base station 13 are electrically connected to the server device 18. How the base station 11 and the base station 13 are electrically connected to the server device 18 is to those of ordinary skill in the art (hereinafter referred to as "the skilled person"). As it is obvious, a detailed description thereof will be omitted.

In this embodiment, the base station 11 and the base station 13 are located at close distances to each other such that the first wireless communication coverage 10 and the second wireless communication coverage 12 overlap each other. The first mobile device 15, the second mobile device 17 are located within the first wireless communication coverage 10 and the second wireless communication coverage 12, and the third mobile device 19 is the first wireless communication coverage. It is located only in (10).

The first mobile device 15 and the third mobile device 19 are wirelessly connected to the base station 11, and the second mobile device 17 is wirelessly connected to the base station 13. As shown in FIG. 1B, the server apparatus 18 in the first embodiment includes a process module 181 and a transmission module 183. The transmission module 183 is electrically connected to the process module 181. More specifically, in the radio communication system 1, the server device 18 allocates a radio bandwidth resource 2 to the base station 11 and the base station 13.

As shown in FIG. 1C, the base station 11 includes a receiving module 111, a process module 113, and a transmitting module 115. Each of the receiving module 111 and the transmitting module 115 is electrically connected to the process module 113.

In the wireless communication system 1, the base station 11 is a first mobile connected wirelessly according to the radio bandwidth resource 2 of the wireless communication system 1 allocated by the server device 18. In communication with the device 15 and the third mobile device 19, the base station 13 is wireless in accordance with the radio bandwidth resource 2 of the wireless communication system 1 allocated by the server device 18. The second mobile device 17 connected to each other may communicate with each other.

Referring to FIG. 1D, the plurality of mobile devices 15, 17, 19 include a receiving module 151, 171, 191, a process module 153, 173, 193, and a sending module 155, 175, 195. do. Each of the receiving module 151, 171, 191 and the transmitting module 155, 175, 195 is electrically connected to the process module 153, 173, 193. It is well known to those skilled in the art that the server device 18, the base station 11, the base station 13, and the plurality of mobile devices 15, 17, 19 perform operations and functions related to each other. Will be called.

1E illustrates a radio bandwidth resource 2 of the wireless communication system 1. When the wireless communication system 1 is in operation, the process module 181 of the server device 18 allocates a radio bandwidth resource 2 according to the usage of the radio bandwidth resource 2. In particular, the process module 181 of the server device 18 may generate a mode switch message 180 according to the usage of the radio bandwidth resource 2.

The transmission module 183 of the server device 18 then transmits the mode switch message 180 to the base station 11 and the base station 13. The base station 11 and the base station 13 receive the mode switch message 180 and then switch between a controlled mode and an uncontrolled mode.

More specifically, when the base station 11 and the base station 13 operate in the control mode, the process module 181 of the server device 18 is a wireless bandwidth resource (2) for data transmission Allocates the controlled radio bandwidth resources of the base station 11 and the base station 13.

However, when the base station 11 and the base station 13 operate in an uncontrolled mode, the process module 181 of the server apparatus 18 controls the radio bandwidth resource 2 for data transmission. Unallocated radio bandwidth resources are allocated to the base station 11 and the base station 13.

Here, the radio bandwidth resource 2 may be allocated according to time, may be allocated according to a frequency band, or may be allocated according to a combination of time and frequency band. However, since these details are obvious to those skilled in the art, detailed descriptions thereof will be omitted.

In order to reduce the uplink and downlink interference from the femtocell base station to the macro base station, the femtocell base station located within the macro base station's wireless communication coverage is partially intersected with the wireless baseband radio resource of the macro base station. Radio bandwidth resources that overlap or do not overlap at all may be used.

That is, interference from the femtocell base station to the macro base station can be prevented. In addition, when a femtocell base station uses a radio bandwidth resource that partially overlaps or does not typically overlap with a macro base station radio bandwidth resource, the interference between the femtocell base stations is in a random frequency hopping manner. It may be distributed according to the frequency band reuse parameters of.

When the transmitting module 183 transmits the mode switch message 180 to the base station 11 and the base station 13, each of the base station 11 and the base station 13 is in a control mode. Switch to uncontrolled mode.

1F illustrates a message transmission process of the wireless communication system 1. Each of the first mobile device 15, the second mobile device 17, and the third mobile device 19 prepares for transmission of the first data 151, the second data 171, and the third data 191. The first mobile device 15, the second mobile device 17, and the third mobile device 19 may be configured to control the uncontrolled wireless bandwidth resource of the wireless bandwidth resource 2 of the wireless communication system 1. request one or more sub-blocks of uncontrolled wireless bandwidth resources (23). Sub-block requests of the plurality of mobile devices 15, 17, 19 are made based on the size of the data transmitted from the base station 11 or the base station 13 which are each electrically connected.

For example, when the process module 153 of the first mobile device 15 prepares to transmit the first data 151, it is first determined and confirmed whether the wireless communication system 1 is in an uncontrolled mode. Then, the transmission module 155 of the first mobile device 15 transmits a first request message 150 to the base station 11 based on the size of the first data 151. The process is illustrated in more detail in FIG. In this embodiment, the uncontrolled radio bandwidth resource 23 includes a plurality of sub-blocks 239 and 243a-243h, and the first request message 150 is transmitted through one of the blocks. .

The first request message 150 is each assigned to a plurality of sub-blocks 239-243a-243h of the uncontrolled radio bandwidth resource 23 in the radio bandwidth resource 2 of the wireless communication system 1. It may include corresponding one or multiple sequences.

The sequences may be all or part orthogonal in time, orthogonal in frequency band, or orthogonal in code. In addition, one or more sequences may be sub-blocks (eg, sub-blocks 240c). In more detail, when the first request message 150 requests a resource of the sub-block 240c, the sub-block 240c is requested from the sequences corresponding to the sub-block 240c. One sequence is selected to be the request message.

The method of selecting one sequence among the sequences may be a random selection method or other selection methods. In this embodiment, the first mobile device 15 uses a plurality of sequences (eg, sb_3 (1)) included in the first request message 150 for use in transmitting the first data 151. , corresponding to sb_5 (1), sb_8 (1), sb_10 (1), among the sub-blocks of the uncontrolled radio bandwidth resource 23 of the radio bandwidth resource 2 of the radio communication system 1 Request sub-blocks.

Similarly, when the process module 173 of the second mobile device 17 prepares to transmit the second data 171, the process module 173 determines whether the wireless communication system 1 is in an uncontrolled mode. Determine and confirm.

Then, the transmission module 175 of the second mobile device 17 transmits a second request message 170 to the base station 13 according to the size of the second data 171. Similarly, the second request message 170 is also transmitted via one of the sub-blocks 239 described above. The second request message 170 also includes one or more sequences corresponding to sub-blocks of the uncontrolled radio bandwidth resource 23 of the radio bandwidth resource 2 of the radio communication system 1. .

In the present embodiment, the second mobile device 17 uses a plurality of sequences (eg, sb_1 (2) included in the second request message 170 for use in transmitting the second data 171. ), sb_2 (2), sb_3 (2), the corresponding sub-blocks among the sub-blocks of the uncontrolled radio bandwidth resource 23 among the radio bandwidth resources 2 of the radio communication system 1. request.

Similarly, when the process module 193 of the third mobile device 19 prepares to transmit the third data 191, the process module 193 determines whether the wireless communication system 1 is in an uncontrolled mode. Determine and confirm. Then, the transmission module 195 of the third mobile device 19 transmits the second request message 170 to the base station 11 according to the size of the third data 191. Similarly, the third request message 190 is also transmitted through one of the sub-blocks 239 described above.

More specifically, each of the third request message 190 also corresponds to one or more sub-blocks of the uncontrolled radio bandwidth resource 23 of the radio bandwidth resource 2 of the radio communication system 1. It contains the above sequences.

In the present embodiment, the third mobile device 19 uses a plurality of sequences (eg, sb_1 (3) included in the third request message 190 for use in transmitting the third data 191. , sb_8 (3), requests the corresponding sub-blocks among the sub-blocks of the uncontrolled radio bandwidth resource 23 among the radio bandwidth resources 2 of the radio communication system 1.

The first mobile device 15 is located within the second wireless communication coverage 12 of the base station 13 and the second mobile device 17 is located in the first wireless communication coverage 10 of the base station 11. When both are located, the first request message 150 sent by the first mobile device 15 may be received by the base station 13 as well as the base station 11. Similarly, the second request message 170 sent by the second mobile device 17 may also be received by the base station 11 in addition to the base station 13.

When the receiving module 111 of the base station 11 receives the first request message 150, the second request message 170, and the third request message 190, the process module 113 receives the first request. Sequences included in the message 150 (ie, sb_3 (1), sb_5 (1), sb_8 (1), sb_10 (1)), sequences included in the second request message 170 (ie, sb_1 ( 2), sb_2 (2), sb_3 (2), and the sequences included in the third request message 190 (ie, sb_1 (3), sb_8 (3)) determine whether they share a matching sequence.

In the present embodiment, the sb_3 (1) sequences included in the first request message 150 and the sb_3 (2) sequences included in the second request message 170 are mutually different in the same sub-block 240a. The sb_8 (1) sequences included in the first request message 150 and the sb_8 (3) sequences included in the third request message 190 are identical to each other in the same sub-block 240b. The sb_1 (2) sequences included in the second request message 170 and the sb_1 (3) sequences included in the third request message 190 coincide with each other in the same sub-block 240g.

Accordingly, the process module 113 of the base station 11 may include a 240a sub-block corresponding to the sb_3 (1) and sb_3 (2) sequences, and 240b corresponding to the sb_8 (1) and sb_8 (3) sequences. It is possible to determine whether a collision will occur in the sub-block, 240g sub-blocks corresponding to the sb_1 (2) and sb_1 (3) sequences. Here, sub-blocks corresponding to other sequences can be used to transmit data without collision.

Then, the transmission module 115 of the base station 11 may perform sequences (eg, sb_1 (2), sb_1 (3), sb_3 (1), sb_3 (2), sb_8 (1), Acknowledgment message containing a conflict message 110 comprising sb_8 (3) sequences and sequences that may be used for data transmission (eg, sb_2 (2), sb_5 (1), sb_10 (1) sequences) The city 112 is transmitted to the first mobile device 15 and the third mobile device 19.

In the same way, the base station 13 may also be used for data transmission and collision message 130 including sequences in which collisions may occur (eg, sb_3 (1), sb_3 (2) sequences). To the second mobile device 17 (eg, sequences sb_1 (2), sb_2 (2), sb_5 (1), sb_8 (1), sb_10 (1)). send.

The method of sending the conflict message and the acknowledgment message may be performed by echoing all sequences received by the sending modules. For example, the transmitting module 115 of the base station 11 may receive all received sequences (eg, sb_1 (2), sb_1 (3), sb_2 (2), sb_3 (1), sb_3 (2), sb_5 ( 1), sb_8 (1), sb_8 (3) and sb_10 (1) can be echoed.

If two or more sequences match for the same sub-block, the mobile devices can know in advance that a collision will occur. On the other hand, if a sequence matches the same sub-block as the previously transmitted sequence, the mobile device determines whether data can be transmitted.

The first mobile device 15 is located within the second wireless communication coverage 12 of the base station 13 and the second mobile device 17 is located in the first wireless communication coverage 10 of the base station 11. When both are located, the conflict message 130 and acknowledgment message 132 sent by the base station 13 may be received by the first mobile device 15. Similarly, the conflict message 110 and the acknowledgment message 112 sent by the base station 11 may also be received by the second mobile device 17.

The receiving module 151 of the first mobile device 15 sends the conflict message 110 and the acknowledge message 112 sent by the base station 11 and the conflict message sent by the base station 13. 130 and the acknowledgment message 132 are received, the process module 153 of the first mobile device 15 includes the sb_3 (1) included in the first request message 150 transmitted before, sb_5 (1), sb_8 (1), sb_10 (1) sequences, sb_1 (2), sb_1 (3), sb_3 (1), sb_3 (2), sb_8 (1) included in the collision message 110 sub-blocks corresponding to the sb_5 (1) and sb_10 (1) sequences based on the sb_8 (3) sequences and the sb_3 (1) and sb_3 (2) sequences included in the collision message 130. Only determine that it can be used to transmit first data 151 to the base station 11.

Then, the transmission module 155 of the first mobile device 15 may store the first data in sub-blocks of the uncontrolled radio bandwidth resource 23 corresponding to the sb_5 (1) and sb_10 (1) sequences. 151). In addition, the process module 153 of the first mobile device 15 may perform sub-blocks 240a and 240b of the uncontrolled radio bandwidth resource 23 corresponding to the sb_3 (1) and sb_8 (1) sequences. The transmission of the first data 151 is stopped.

Similarly, the receiving module 171 of the second mobile device 17 is sent by the base station 11 and the conflict message 130 and acknowledgment message 132 sent by the base station 13. If both the conflict message 110 and the authorization message 112 are received, the process module 173 of the second mobile device 17 may include the sb_1 included in the second request message 170 previously transmitted. (2), sb_2 (2), sb_3 (2) sequences, sb_3 (1), sb_3 (2) sequences included in the collision message 130, sb_1 (2) included in the collision message 110 based on the sb_1 (3), sb_3 (1), sb_3 (2), sb_8 (1), and sb_8 (3) sequences, only the sub-blocks corresponding to the sb_2 (2) sequences are second data ( 171 may be used to transmit to the base station 13.

Then, the transmission module 175 of the second mobile device 17 transmits the second data 171 to sub-blocks of the uncontrolled radio bandwidth resource 23 corresponding to the sb_2 (2) sequence. In addition, the process module 173 of the second mobile device 17 performs sub-blocks 240g and 240a of the uncontrolled radio bandwidth resource 23 corresponding to the sb_1 (2) and sb_3 (2) sequences. The transmission of the second data 171 is stopped.

Also similarly, when the receiving module 191 of the third mobile device 19 receives the conflict message 110 and the acknowledgment message 112 sent by the base station 11, the third mobile device The process module 193 of (19) includes sb_1 (3), sb_8 (3) sequences included in the third request message 190 transmitted before, and sb_1 (2) included in the collision message 110. ), based on the sb_1 (3), sb_3 (1), sb_3 (2), sb_8 (1), and sb_8 (3) sequences, any sub-blocks corresponding to the sequence may store the third data 191 above. It can be determined that it can be used to transmit to the base station (11).

The process module 193 of the third mobile device 19 then waits for the third data (3) to wait for sub-blocks of the uncontrolled radio bandwidth resource 23 that can be used for the transmission of the third data 191. The transmission of 191 is stopped or the third data 191 is temporarily stored.

Each of the first data 151, the second data 171, and the third data 191 are transmitted by the first mobile device 15, the second mobile device 17, and the third mobile device 19. Identification headers, which are included in fixed locations of sub-blocks of the uncontrolled radio bandwidth resource 23 of the radio bandwidth resource 2, in order to take advantage of a fixed modulation and encoding scheme. ) Is sent.

Each of these ID headers may include a first mobile device 15, a second mobile device 17, and a third mobile device 19; A base station (13) connected to the first mobile device (15), a second mobile device (17) and a third mobile device (19) connected wirelessly; Identities of serial numbers used by modulation schemes, encoding schemes, and first data 151, second data 171, and third data 191; And other related information.

At this time, collision sequences 110 and 130 are transmitted by the base station 11 and the base station 13 by the first mobile device 15, the second mobile device 17, and the third mobile device 19. It is not merely to determine whether the first data 151, the second data 171, and the third data 191 can be transmitted based on the above, and furthermore, the first mobile device 15, 2 the first data 151 based on the grant messages 112, 132 sent by the base station 11 and the base station 13 by the mobile device 17 and the third mobile device 19. It will be apparent to those skilled in the art how to determine whether the second data 171 and the third data 191 can be transmitted. Therefore, detailed description thereof will be omitted.

2A and 2B illustrate a communication method using a wireless communication system according to a second embodiment of the present invention. The communication method according to the present invention can be used for the base station 11 and the base station 13 of the wireless communication system 1 according to the first embodiment of the present invention described above. The wireless communication system includes a server device, base stations, and a number of mobile devices. The mobile devices include a first mobile device, a second mobile device, and third mobile devices.

The server device is electrically connected to the base station, each of the base station and another base station. A first mobile device that includes the first data is wirelessly connected to the base station, and a second mobile device that includes second data is wirelessly connected to the other base station and includes a third data; The mobile device is wirelessly connected with the base station.

In particular, the communication method according to the embodiment of the present invention includes a plurality of codes loaded by a computer in the base station and to be executed in the base station, and implemented by a computer program product for performing the communication method. Can be. Such computer program products may be stored in a read only memory (ROM), flash memory, floppy disk, hard disk, compact disk, mobile disk, magnetic tape, database that may be connected to a network, or other storage media.

First, the process module of the base station switches the mode of the base station from the control mode to the uncontrolled mode based on the mode change message (step 201). The receiving module of the base station then receives at least one first sequence and a first request message transmitted by the first mobile device (step 202).

Next, the receiving module of the base station receives at least one second sequence and a second request message sent by the second mobile device (step 203), and it is determined whether to receive a third request message. (Step 204).

In step 204, if the third request message has not been received, the process module of the base station determines whether the at least one first sequence and at least one second sequence match the same sub-block (step 207). ).

If the at least one first sequence and the at least one second sequence match the same sub-block, the base station transmits a collision message (step 209). Next, the first mobile device and the second mobile device stop the first data and the second data transmission based on the collision message in step 209 (step 211).

Otherwise, if the at least one first sequence and at least one second sequence do not match the same sub-block, the base station sends an acknowledgment message (step 213). Next, the first mobile device and the second mobile device transmit the first data and the second data based on the authorization message in step 213 (step 215).

On the other hand, if it is determined in step 204 that the third request message is received, the receiving module of the base station receives the third request message along with at least one third sequence sent by the third mobile device. (Step 205).

Next, the process module of the base station determines whether the at least one first sequence and the at least one third sequence coincide with the same sub-block (step 217). If the at least one first sequence and at least one third sequence match the same sub-block, then the transmitting module of the base station transmits a collision message (step 219).

Next, the first mobile device and the third mobile device stop the first data and the third data transmission based on the collision message transmitted in step 219 (step 221). Otherwise, if the at least one first sequence and at least one third sequence do not coincide with the same sub-block, the process module of the base station is configured to at least one third sequence and at least one third sequence. Determine whether the PB coincides with the same sub-block (step 223).

If the at least one second sequence and the at least one third sequence match the same sub-block, then the transmitting module of the base station transmits a collision message (step 225). Next, the second mobile device and the third mobile device stop the transmission of the second data and the third data based on the collision message transmitted in step 225 (step 227).

Otherwise, if at least one second sequence and at least one third sequence match the same sub-block, then the sending module of the base station sends an acknowledgment message (step 229). Finally, the first mobile device and the third mobile device transmit the first data and the third data based on the approval message transmitted in step 229 (step 231).

In addition to the above-described steps, the communication method according to the embodiment of the present invention may also perform operations and functions of the base station of the first embodiment. However, the communication method for performing such operations and functions will be easily derived by those skilled in the art based on the first embodiment described above, and thus a detailed description thereof will be omitted.

3 shows a communication method for a wireless communication system according to a third embodiment of the present invention. The communication method can be used by mobile devices such as mobile devices 15, 17, 19 in the first embodiment of the present invention. The wireless communication system further includes a base station and a base station different from the base station. The mobile device is wirelessly connected to the base station.

In particular, the communication method according to the embodiment of the present invention includes a plurality of codes loaded by a computer in the base station and to be executed in the base station, and implemented by a computer program product for performing the communication method. Can be. Such computer program products may be stored in a read only memory (ROM), flash memory, floppy disk, hard disk, compact disk, mobile disk, magnetic tape, database that may be connected to a network, or other storage media.

First, the process module of the mobile device determines whether the wireless communication system is in an uncontrolled mode (step 301). Then, the transmission module of the mobile device transmits a request message including at least one sequence (step 303). Next, the receiving module of the mobile device receives a response message sent by the base station (step 305).

The process module of the mobile device then determines whether the response message is a conflict message (step 307). If so, the process module of the mobile device stops transmitting data (step 309). Otherwise, if it is determined in step 307 that the response message is not a conflict message but an acknowledgment message, the transmission module of the mobile device transmits the data (step 311).

In addition to the above-described steps, the communication method according to the embodiment of the present invention may also perform operations and functions of the base station of the first embodiment. However, the communication method for performing such operations and functions will be easily derived by those skilled in the art based on the first embodiment described above, and thus a detailed description thereof will be omitted.

4 illustrates a communication method in a server of a wireless communication system according to a fourth embodiment of the present invention. The above communication method can be performed by the server device 18 in the first embodiment of the present invention. The wireless communication system further includes a base station and a base station different from the base station.

In particular, the communication method according to the embodiment of the present invention includes a plurality of codes loaded by a computer in the base station and to be executed in the base station, and implemented by a computer program product for performing the communication method. Can be. Such computer program products may be stored in a read only memory (ROM), flash memory, floppy disk, hard disk, compact disk, mobile disk, magnetic tape, database that may be connected to a network, or other storage media.

First, the process module of the server device generates a mode switch message according to the usage of radio bandwidth resources (step 401). Next, the transmission module of the server device transmits the mode switch message, and the base station and the other base station may be switched from the control mode to the uncontrolled mode in response to the mode switch message (step 403).

In addition to the above-described steps, the communication method according to the embodiment of the present invention may also perform operations and functions of the server device of the first embodiment. However, the communication method for performing such operations and functions will be easily derived by those skilled in the art based on the first embodiment described above, and thus a detailed description thereof will be omitted.

As described above, the computer program task for the base station, the communication method, and the communication method according to an embodiment of the present invention is a radio bandwidth resource of a wireless communication system based on request messages received from a plurality of mobile devices. And reallocate the radio bandwidth resources to account for potential collisions, thereby reducing signal interference between multiple base stations of the wireless communication system.

According to this method, when a plurality of base stations are concentrated within a short distance, interference between signals of different communication systems can be efficiently eliminated without changing the existing hardware structure of the wireless communication systems.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1A to 1G are schematic views according to a first embodiment of the present invention.

2A and 2B are flowcharts of a communication method according to a second embodiment of the present invention.

3 is a flowchart of a communication method according to a third embodiment of the present invention.

4 is a flowchart of a server method according to a fourth embodiment of the present invention.

Claims (21)

Base station—the base station is for a wireless communication system comprising a server device, another base station and a plurality of mobile devices, the mobile devices having a first datum; A second mobile device having a first mobile device and a second datum, wherein the server device is electrically connected to the base station and the other base station, and the first mobile device is wirelessly connected to the base station. Wherein the second mobile device is wirelessly connected to the other base station, and wherein the first and second mobile devices are located within wireless communication coverage of the base station and wireless communication coverage of the other base station. , The base station Transmitted by the server device according to the usage of radio bandwidth resources of the wireless communication system, the radio bandwidth resources include uncontrolled radio bandwidth resources, and the uncontrolled radio bandwidth resources include a plurality of sub-blocks. A receiving module for receiving a mode switch message; A process module for switching the base station from a control mode to an uncontrolled mode according to the mode switch message; And Including a transmission module, The receiving module additionally receives a first request message sent by the first mobile device having at least one first sequence and a second request sent by the second mobile device having at least one second sequence. Receive the message, The process module may include the at least one first sequence and the at least one second sequence, wherein the at least one first sequence and the at least one second sequence each comprise at least one sub- among the plurality of sub-blocks. Determine whether the corresponding block corresponds to the same sub-block among the plurality of sub-blocks, The sending module sends a response message according to whether the at least one first sequence and the at least one second sequence match the same sub-block according to the determination of the process module, and wherein the first mobile device A base station for determining whether to transmit the first data according to a response message. The method of claim 1, When the process module determines that at least one first sequence and at least one second sequence match the same sub-block, the sending module sends a collision message so that the first mobile device is sent according to the collision message. Stop transmitting the first data, causing the second mobile device to stop sending the second data in accordance with the conflict message, and the response message is the conflict message. The method of claim 1, When the process module determines that the at least one first sequence and the at least one second sequence do not coincide with the same sub-block, the sending module sends an acknowledgment message and according to the acknowledgment message the first one. A mobile device to transmit the first data to the base station, the second mobile device to transmit the second data to the base station according to the acknowledgment message, and the response message is the acknowledgment message. The method of claim 1, The mobile devices further comprise a third mobile device having third data, the third mobile device being wirelessly connected to the base station, and the receiving module comprises at least one third sequence-the at least one third A sequence receives a third request message sent by the third mobile device, each having at least one sub-block among the plurality of sub-blocks, The process module determines whether the at least one first sequence, at least one second sequence, and at least one third sequence match the same sub-block among the plurality of sub-blocks, The sending module sends the response message according to whether the at least one first sequence, the at least one second sequence, and the at least one third sequence match the same sub-block according to the determination of the process module. To determine whether the third mobile device transmits the third data according to the response message. 5. The method of claim 4, When the process module determines that the at least one first sequence and the at least one third sequence coincide with the same sub-block, the sending module sends a collision message to according to the collision message the first mobile device. The base station to stop transmitting the first data and cause the third mobile device to stop transmitting the third data in accordance with the conflict message. 5. The method of claim 4, When the process module determines that the at least one second sequence and the at least one third sequence match the same sub-block, the sending module sends a collision message to the first mobile in accordance with the collision message. Cause the device to stop transmitting the first data and cause the third mobile device to stop transmitting the third data in accordance with the conflict message, wherein the response message is the conflict message. 5. The method of claim 4, The process module determines that at least one third sequence and the at least one first sequence do not match the same sub-block, and wherein the at least one third sequence and the at least one second sequence are the same sub Determining that the block does not match, the sending module sends an acknowledgment message to cause the first mobile device to transmit the first data to the base station in accordance with the acknowledgment message, and the second mobile device sends the acknowledgment message. Send second data to the base station according to an acknowledgment message, and cause the third mobile device to transmit the third data to the base station according to the acknowledgment message, the response message being the acknowledgment message. . A server device, a base station, another base station, and a plurality of mobile devices, the mobile devices having a first mobile device and a second datum having a first datum A second mobile device, wherein the server device is electrically connected to the base station and the other base station, the first mobile device is wirelessly connected to the base station, and the second mobile device is wirelessly connected to the base station. Coupled to another base station, wherein the first and second mobile devices are located within wireless communication coverage of the base station and wireless communication coverage of the other base station; In the communication method, The communication method The receiving module of the base station is adapted to the usage of radio bandwidth resources of the wireless communication system, the radio bandwidth resources including uncontrolled radio bandwidth resources, the uncontrolled radio bandwidth resources including a plurality of sub-blocks. Enabling to receive a mode switch message sent by the server device accordingly; Enabling the process module of the base station to switch the base station from control mode to uncontrolled mode in accordance with the mode switch message; Enabling the receiving module to receive a first request message that includes at least one first sequence sent by the first mobile device; Enabling the receiving module to receive a second request message that includes at least one second sequence sent by the second mobile device; Said at least one first sequence and said at least one second sequence, wherein said at least one first sequence and said at least one second sequence are each at least one sub-block of said plurality of sub-blocks; Enabling to determine whether the corresponding block corresponds to the same sub-block among the plurality of sub-blocks; and Enabling the transmitting module of the base station to transmit a response message according to whether the at least one first sequence and the at least one second sequence match the same sub-block according to the determination of the process module; Including, And the first mobile device determines whether to transmit the first data according to the response message. 9. The method of claim 8, wherein enabling to send the response message Enabling the sending module to send a conflict message when the at least one first sequence and the at least one second sequence match the same sub-block, Stop sending the first data by the first mobile device according to the collision message, The second mobile device stops transmitting the second data in accordance with the conflict message, wherein the response message is the conflict message. 9. The method of claim 8, wherein enabling to send the response message Enabling the sending module to send an acknowledgment message when the at least one first sequence and the at least one second sequence match the same sub-block, The first mobile device sends the first data to the base station according to the acknowledgment message, The second mobile device sends the second data to the base station in accordance with the authorization message, wherein the response message is the authorization message. The method of claim 8, The mobile devices further comprise a third mobile device having third data, the third mobile device being wirelessly connected to the base station for the communication, The communication method At least one third sequence in which the receiving module is transmitted by the third mobile device, the at least one third sequence corresponding to at least one sub-block among the plurality of sub-blocks, respectively; 3 enabling to receive the request message; and Enabling the process module to determine whether the at least one first sequence, the at least one second sequence, and the at least one third sequence match the same sub-block among the plurality of sub-blocks. Including more, The transmitting module transmits the response message according to whether the at least one first sequence, the at least one second sequence and the at least one third sequence match the same sub-block according to the determination of the process module. And the third mobile device determines whether to transmit the third data according to the response message. 12. The method of claim 11, wherein enabling to send the response message Enabling the sending module to send a conflict message when the at least one first sequence and the at least one third sequence match the same sub-block, The first mobile device stops transmitting the first data according to the collision message, The third mobile device stops transmitting the third data according to the conflict message, and the response message is the conflict message. 12. The method of claim 11, wherein enabling to send the response message Enabling the sending module to send a conflict message when the at least one second sequence and the at least one third sequence match the same sub-block, The first mobile device transmits the first data to the base station according to the collision message; The third mobile device transmits the third data to the base station according to the conflict message, wherein the response message is the conflict message. 12. The method of claim 11, wherein enabling to send the response message The at least one third sequence and the at least one first sequence do not match the same sub-block, and the at least one third sequence and the at least one second sequence do not match the same sub-block If not, further comprising enabling the sending module to send an acknowledgment message, The first mobile device sends the first data to the base station according to the acknowledgment message, The second mobile device sends the second data to the base station in accordance with the authorization message; The third mobile device transmits the third data to the base station in accordance with the acknowledgment message, wherein the response message is the acknowledgment message. The apparatus further comprises a wireless communication system, the wireless communication system including a server device, a base station, another base station and a plurality of mobile devices, the mobile devices having a first datum and a first mobile device having second data. a second mobile device having a datum, the server device electrically connected to the base station and the other base station, the first mobile device wirelessly connected to the base station, and the second mobile device. A device is wirelessly connected to the other base station, and the first and second mobile devices are performed by the base station for being located within wireless communication coverage of the base station and wireless communication coverage of the other base station. Actionable Codes to Perform a Communication Method A tangible computer-readable recording medium having: The executable codes are The receiving module of the base station is adapted to the usage of radio bandwidth resources of the wireless communication system, the radio bandwidth resources including uncontrolled radio bandwidth resources, the uncontrolled radio bandwidth resources including a plurality of sub-blocks. Code A for enabling to receive a mode switch message sent by the server device accordingly; Code B for enabling the process module of the base station to switch the base station from control mode to uncontrolled mode in accordance with the mode switch message; Code C for enabling the receiving module to receive a first request message that includes at least one first sequence sent by the first mobile device; Code D for enabling the receiving module to receive a second request message that includes at least one second sequence sent by the second mobile device; Said at least one first sequence and said at least one second sequence, wherein said at least one first sequence and said at least one second sequence are each at least one sub-block of said plurality of sub-blocks; Code E for enabling to determine if the corresponding block corresponds to the same sub-block among the plurality of sub-blocks; and Code for enabling the transmitting module of the base station to transmit a response message according to whether the at least one first sequence and the at least one second sequence match the same sub-block according to the determination of the process module Contains F, And the first mobile device determines whether to transmit the first data in accordance with the response message. The method of claim 15 wherein the code F is Code F1 for enabling the sending module to send a conflict message when the at least one first sequence and the at least one second sequence match the same sub-block, The first mobile device stops transmitting the first data according to the collision message, And the second mobile device stops transmitting the second data in accordance with the conflict message, and wherein the response message is the conflict message. The method of claim 15 wherein the code F is And further comprising a code F1 for enabling the sending module to send an acknowledgment message when the at least one first sequence and the at least one second sequence do not match the same sub-block, The first mobile device sends the first data to the base station according to the acknowledgment message, The second mobile device sends the second data to the base station in accordance with the authorization message, wherein the response message is the authorization message. The method of claim 15, The mobile device further comprises a third mobile device having third data, the third mobile device being wirelessly connected to the base station, The executable codes are At least one third sequence in which the receiving module is transmitted by the third mobile device, the at least one third sequence corresponding to at least one sub-block among the plurality of sub-blocks, respectively; 3 code G for enabling to receive the request message; and Code for enabling the process module to determine whether the at least one first sequence, the at least one second sequence, and the at least one third sequence match the same sub-block among the plurality of sub-blocks Further includes H, The transmitting module transmits the response message according to whether the at least one first sequence according to the process module determines that the at least one second sequence and the at least one third sequence match the same sub-block, and And the third mobile device determines whether to transmit the third data in accordance with the response message. 19. The method of claim 18 wherein the code F is And further comprising code F1 for enabling the sending module to send a conflict message when the at least one first sequence and the at least one third sequence match the same sub-block, The first mobile device stops transmitting the first data according to the collision message, The third mobile device stops transmitting the third data in accordance with the conflict message, and the response message is the conflict message. 19. The method of claim 18 wherein the code F is A code F1 for enabling the sending module to send a collision message when the at least one second sequence and the at least one third sequence match the same sub-block, The first mobile device stops transmitting the first data according to the collision message, The third mobile device stops transmitting the third data in accordance with the conflict message, and the response message is the conflict message. 19. The method of claim 18 wherein the code F is The at least one third sequence and the at least one first sequence do not match the same sub-block, and the at least one second sequence and the at least one third sequence do not match the same sub-block If not, further comprises code F1 for enabling the sending module to send an acknowledgment message; The first mobile device sends the first data to the base station according to the acknowledgment message, The second mobile device sends the second data to the base station in accordance with the authorization message; The third mobile device sends the third data to the base station in accordance with the authorization message, wherein the response message is the authorization message.

Images