TWI424760B - Method for mobile communication and system thereof - Google Patents

Description

Mobile communication method and system thereof [Cross-Reference to Related Applications]

This application claims the benefit of U.S. Provisional Application No. 61/167,664, filed on Apr. 8, 2009, and U.S. Provisional Application No. 61/168,413, filed on Apr. 10, 2009, and the entire contents of Into this article.

The present invention relates to a mobile communication technology, and more particularly to a mobile communication method and system for grouping sub-base stations and user devices according to their locations and allocating transmission resources in accordance with the grouping result.

In order to construct and provide an information transmission environment that is easy to use and fast to transmit, telecommunication service providers continue to develop and improve existing mobile communication network technologies. For example, the 3rd generation of mobile communication technology (3-rd Generation, 3G) Universal Mobile Telecommunications System (UMTS), terrestrial radio access network (UMTS Terrestrial Radio Access Network) UTRAN, GERAN (GSM/EDGE) system, Worldwide Interoperability for Microwave Access (WiMAX) system and other wireless network technologies, which simultaneously develop and improve mobile communication networks.

In many mobile communication networks, a base station (BS) is often used as a communication access point for many wireless communication devices. The wireless communication device may be a mobile terminal device (Mobile Station, MS) (for example, a mobile phone) or a user device (User Device (UE)) (for example, a notebook computer), and of course, the mobile terminal device may also be User device and vice versa. The wireless communication device can be a fixed device (such as a personal computer (PC)) or a mobile device (such as a cellular phone, laptop, or other mobile communication device). In addition, the mobile communication network has focused on improving the performance of Wireless Broadband Access (WBA) in recent network developments. Due to the large coverage of macro BSs (also known as giant coverage areas), the range of mobile communication devices supported by them is large, so they have a heavy communication burden. Large base stations and their giant coverage areas can be collectively referred to as giants. Unit (macrocell). Moreover, due to factors such as environmental protection and competition, large base stations have made it difficult to set up, and the communication efficiency of buildings indoors will have communication dead angles due to factors such as the orientation of the base station and the shielding by buildings or other obstacles, and the communication in the room will be made. The quality is mixed. Therefore, the deployment of local or sub-base stations (eg, ultra-micro base stations, femto base stations (Femto BS), home base stations (Home BS, HBS)) has become a good solution to increase indoor communication performance.

The low power and high frequency width of the sub-base station allows the user to install the mobile communication access point, which provides a sub-coverage area with a smaller coverage. The femto base station and its sub-coverage area can be collectively referred to as a femtocell. Put it in a residential or small business environment for use. Regional femtocells can be built and superimposed on parts of the giant cell to cope with highly dense mobile communication areas. Moreover, the sub-base station can connect the sub-base station to the core internet via a wired communication mechanism access mechanism such as a digital subscriber line (DSL) to enjoy the wide-band mobile communication service. . In general, the advantages of erecting sub-base stations can be explained in two ways. From a telecom point of view, advantages include (1) reducing backhaul capacity requirements; (2) increasing wireless capacity; and (3) reducing coverage vulnerabilities and generating new integrated services. From the customer's point of view, the advantages include (1) good indoor coverage and quality without the need to change the phone; and (2) one number one phone and regional specific price.

However, since the coverage areas of large base stations and sub-base stations often overlap, information transmission will interfere with each other. In addition, large base stations will also suffer from poor transmission quality due to problems such as interference or transmission resource allocation.

The invention provides a method for mobile communication, which uses the location of the sub-base station and the user device to group the sub-communication devices, and allocates transmission resources according to the grouping result, so that the main base station and the sub-base station can simultaneously transmit information, and further Improve communication performance.

The invention proposes a method of mobile communication for a mobile communication system. The mobile communication system includes a primary base station and a plurality of sub-communication devices, each of which is one of a sub-base station and a user device. The sub-base station sub-coverage area and the location of the user equipment are all located within the main coverage area of the main base station. The method comprises the steps of: obtaining information of the sub-communication devices, wherein the sub-communication device information includes locations of the sub-communication devices, and grouping the sub-communication devices according to the location of the sub-communication devices, and obtaining transmission resources according to the grouping result An allocation, the sub-communication device receives an allocation of transmission resources for controlling transmission and data transmission and data reception, and in response to the receiving of the foregoing allocation, the sub-communication devices allocating the same transmission resource enable the same transmission resource Use.

From another point of view, the present invention provides a mobile communication system comprising a primary base station, a plurality of sub-communication devices, and a location server. Each of the sub-communication devices may be one of a sub-base station and a user device, wherein the sub-base station sub-coverage area and the user device are located within the main coverage area of the main base station. The location server is used to obtain sub-communication device information, and the sub-communication device information includes the location of the sub-communication device. And, the location server groups the sub-communication devices according to the location of the sub-communication device. Then, the primary base station and the sub base station obtain the allocation of the transmission resources according to the grouping result. These sub-communication devices respond to the receipt of the assignment, and the sub-communication devices assigned the same transmission resource enable the use of the same transmission resource.

Based on the above, the embodiment of the present invention receives the location of each sub-base station and the user device, thereby grouping the sub-action communication devices, and allocating transmission resources by means of time sharing and frequency division, and let the sub-base station use The device or the primary base station can simultaneously transmit information with little interference to maintain a good and stable communication quality. When the sub-base station finds that the user device enters its sub-coverage area, the main base station can transfer its control right to the sub-base station, so that the user device can obtain good communication quality.

The above described features and advantages of the present invention will be more apparent from the following description.

Reference will now be made in detail to the exemplary embodiments embodiments In addition, wherever possible, the elements and/

When the sub-base station is placed in a macrocell of a large base station (macro BS, MBS) (which may also be referred to as a main base station in this embodiment), the sub-base station often interacts with the large base station. In a mobile communication network, operating parameters can be set for individual base stations by planning a femtocell, including carrier frequency, power, bandwidth, and the like. In the case of limited transmission resources, the concept of frequency reuse can also be used to improve overall network performance. During the planning process, the operator must conduct on-site investigations, including obtaining coverage areas of various base stations, and may also need to obtain the range of user device signals, also known as the coverage area of the user device, to obtain the parameters in the process of setting parameters. Information needed. However, plug-and-play installation situations are often involved when installing sub-base stations, so it may be less appropriate to plan the femtocells by manpower.

Another way of planning is to automatically allocate transmission resources so that the primary base station and the sub-base station can avoid simultaneous simultaneous use of a time division mechanism (TDM) and/or a frequency division mechanism (FDM). Interfering with each other by transmitting information. However, since the number of sub-base stations in a particular jumbo unit may be too large, the main base station and the sub-base station inevitably re-use the same transmission frequency/resources, resulting in a decrease in communication quality and performance. As shown in FIG. 1, FIG. 1 illustrates six examples of possible interferences between the primary base station MBS and the sub-base station HBS in the mobile communication network, and FIG. 1 includes Table 1. In the case listed in Table 1, the user equipments UE1 and UE4 in the primary coverage area and the user equipments UE2 and UE3 in the sub-coverage area will all descend to the primary base stations MBS1, MBS2 and the sub-base stations HBS1 and HBS2. The link and uplink cause interference. It is noted that FIG. 1 is not drawn to scale and is merely illustrative of various examples.

Therefore, the embodiment proposed herein can provide the following concept: when allocating a resource block (RB), the primary base station MBS1 reserves part of the transmission resource RB for use by the sub-base stations HBS1 HBS6 to thereby avoid Mutual interference, please refer to Figure 2. FIG. 2 is a schematic diagram of a mobile communication system 200 avoiding interference by using a reserved transmission resource RB according to an embodiment. In this embodiment, the sub-coverage areas of the sub-base stations HBS1 to HBS6 and the user equipments UE1~UEN are both located in the main coverage area of the primary base station MBS1, and N is a positive integer.

The transmission resource RB is a transmission bandwidth and a time interval reserved for the primary base station MBS1 or the sub-base station HBS1~HBS6 to transmit information to the user equipment in the coverage area, and the left half block of the transmission resource RB is the primary base station MBS1. Or the sub-base station HBS1~HBS6 transmits the information to the downlink of the user equipment, that is, the primary base station MBS1 or the sub-base station HBS1~HBS6 uses the transmission resources (including the transmission bandwidth and the time interval) shown in FIG. 2 to A user device located within its coverage area. In contrast, the right half of the transmission resource RB is a transmission resource used by the user equipment to upload information to the primary base station MBS1 or the sub-base stations HBS1 to HBS6, which is also referred to as an uplink. In this embodiment, the allocation of the transmission resource RB includes multiple resource allocation units, and each resource allocation unit includes frequency allocation, time allocation, frequency-time block, allocated power level, allocation code level, etc., or random combination.

As can be seen from FIG. 2, the method described in this embodiment can reserve part of the transmission resource RB to the sub-base stations HBS1 to HBS6, and the primary base station MBS1 cannot use the reserved transmission resource RB. For example, when the first transmission resource RB1 has been reserved for the sub-base station HBS1, the primary base station MBS1 prohibits the use of the first transmission resource RB1 to transmit information. In contrast, the unreserved transmission resource RB is handed over to the primary base station MBS1. At this time, each of the sub-base stations HBS1 to HBS6 cannot use the unreserved transmission resource RB, thereby achieving the purpose of avoiding mutual interference. However, when there are too many sub-base stations HBS1~HBS6 in the primary coverage area, since each sub-base station HBS1~HBS6 has its required transmission network bandwidth, the transmission resource RB cannot be allocated too finely, thus causing transmission resources. RB cannot be supplied to all base stations in full.

Accordingly, some embodiments of the present invention may group these sub-communication devices by the location and mutual interference of the sub-base station and the user device. And the transmission resource RB is allocated according to the clustering result, so that the primary base station and the sub-base station can simultaneously transmit information and reduce mutual interference, thereby improving communication quality and improving communication efficiency. Thus, the use of embodiments of the present invention can increase the utilization of transmission resources while at the same time avoiding or slowing down the interference shown in FIG.

As shown in FIG. 3, FIG. 3 is a schematic diagram of a system 300 for mobile communication according to an embodiment of the invention. The mobile communication system 300 includes a primary base station MBS1, sub-base stations HBS1 and HBS2, user devices UE1~UE3, and a location server 310. The sub-base stations HBS1, HBS2 and the user devices UE1~UE3 may be referred to as sub-communication devices. The sub-area stations HBS1, HBS2 sub-coverage area and the location of the user equipments UE1~UE3 are all located within the main coverage area of the main base station MBS1. In this embodiment, the sub-base stations HBS1 and HBS2 are connected to the Internet (Internet) 330 by an operator network 320 (for example, DSL or fiber-optic cable) provided by an operator (ISP), and the main base station MBS1 is also connected to Internet 330. The location server 310 is located in the mobile core network 340 and is connected to the Internet 330 to be coupled to the primary base station MBS1 and the sub base stations HBS1, HBS2. The operator network 320, the Internet 330, and the mobile core network 340 are collectively referred to as the backhaul of the mobile communication system 300.

The embodiment of the present invention will be described in detail herein. Please refer to FIG. 4 and FIG. 5 at the same time. 4 is a flow chart of a method for mobile communication according to an embodiment of the invention. FIG. 5 is a control structural diagram of a method for mobile communication according to an embodiment of the invention. In the present embodiment, the sub-base station HBS1 is initialized in the main coverage area of the main base station MBS1 as an example. In other embodiments, the sub-base station HBS1 can be replaced with a sub-communication device (eg, a user device).

In step S410, when the sub-base station HBS1 is initialized, it will first search for its own location, and then the location information together with the degree of interference between the sub-communication devices, and the user device within the sub-area coverage area of the sub-base station HBS1 The information such as the bandwidth requirement forms a sub-communication device information, and the sub-communication device information is sent to the location server 310 through the back-end network, and the location server 310 also includes location information of other initialized sub-communication devices. In this embodiment, the sub-base station HBS1 herein can confirm its location by using a Global Positioning System (GPS). In other embodiments, the router or the gateway of the operator network or the gateway can be used to determine the approximate location of the sub-base station HBS1, so which method is used, or Whether the location information is obtained by the sub-base station itself, the present invention should not be limited to the above embodiments. Of course, there is also the possibility that the location information of some sub-base stations cannot be obtained.

Next, proceeding to step S420, the location server 310 first divides the sub-communication device into non-return location information and return location information according to whether the location of the sub-communication device is known or not, and transmits the data to the main base station MBS1. For the sub-communication device with no return position information, the primary base station MBS1 or the location server 310 first classifies the sub-communication devices into resource regions (RB regions) used for position-insensitive. For a sub-communication device that returns location information, the primary base station MBS1 or the location server 310 classifies the sub-communication devices into resource regions that use position-intensive information. If the above-mentioned grouping operation is completed by the location server 310, the sub-communication device grouping results and information generated based on the location information of the sub-communication device are sent to the primary base station MBS1. The action of grouping in the above embodiment may be performed by the primary base station or the location server, but is not intended to limit the present invention.

In step S430, since the required bandwidth of each sub-base station HBS1 is different, but only limited and fixed transmission resources are used, the primary base station MBS1 and its sub-base station HBS1 must allocate transmission resources according to the group information. Negotiate to obtain the allocation of transmission resources. Among them, the sub-communication devices allocated to the same or partially overlapping transmission resources can simultaneously transmit information using the same frequency and reduce mutual interference. In addition, the size of the transmission resources required by each sub-communication device may be different, so the sub-communication device that requires less transmission resources may belong only to a part of the allocated transmission resources, and other unoccupied transmission resources may be negotiated by the allocation. A sub-communication device that requires more transmission resources is given. In this embodiment, after the negotiation of the transmission resource allocation, the primary base station MBS1 updates the group information in the location server 310 for use in the negotiation of the next transmission resource.

In step S440, the sub-base stations HBS1 and the user equipment (both may be referred to as sub-communication devices) located in the main coverage area of the primary base station MBS1 receive the allocation of the foregoing transmission resources for controlling transmission, Data transmission and data reception. The sub-base station HBS1 can use the back-end network to receive the allocation of the transmission resource RB, and can also obtain the allocation from the broadcast information of the primary base station MBS1. In addition, the user device that transmits information via the primary base station MBS1 can also obtain the allocation from the broadcast information of the primary base station MBS1, and the present invention should not be limited thereto. Then in step S450, each sub-communication device responds to the reception of the allocation, wherein the sub-communication device allocated to the same transmission resource RB can enable the use of the same transmission resource RB. For example, a sub-communication device assigned to the same transmission resource RB can simultaneously transmit information using the same frequency. By using this method, interference between the primary base station MBS1 and the child communication device can be avoided or mitigated, and the user can enjoy a large data transmission rate.

Wherein, an embodiment of the present invention has a plurality of ways of grouping sub-communication devices, and two types of grouping methods are listed herein, the purpose of which is to find sub-communication devices with low mutual interference to be allocated to the same or partially overlapping ones. The resource RB is transmitted so that the sub-communication devices can simultaneously transmit information using the same frequency, and thus the present invention should not be limited thereto. FIG. 6 is a schematic diagram showing a grouping method according to an embodiment of the invention. Where "r" indicates the radius of the sub-area of the sub-base stations HBS1 to HBS6. In this embodiment, the user equipments UE1~UE3 and the sub-base stations HBS1~HBS6 are classified as resource areas with location information, which can obtain their own location information, and the user equipment UEN is classified as used. A resource area without location information that cannot detect its location or provide information about its location, so it is controlled by the primary base station MBS1. For the first type of grouping, please refer to Figure 6 and Table 2.

As shown in FIG. 6, when the relative distance between the sub-base stations HBS1 and HBS4 is less than "2r" (also referred to as a distance threshold), it indicates that the sub-base stations HBS1 and HBS4 have overlapping portions. The threshold value of the distance here may vary depending on various factors of the communication environment, and the present invention should not be limited thereto. In the present embodiment, the location server 310 divides the sub-base stations HBS1 and HBS4, HBS2 and HBS3 having the overlapping portions into the same group, and the grouping result is shown in Table 2, and details are not described herein again. The user device may also adopt the grouping mechanism as in the above embodiment, wherein the sub-coverage area may also be determined by signal strength or interference strength or the like.

Next, when the transmission resource RB is allocated, the primary base station MBS1 allocates the same transmission resource RB to one of each group of sub-base stations or one of the user equipments. For example, the transmission resource RB in FIG. 6 assigns the sub-base station HBS1 of the first group in the second group, the sub-base station HBS2 of the second group, and the sub-base station HBS5 of the third group to the user equipment UE1 in the same manner. Transmission resource RB. Thereby, the sub-base station HBS1 of the first group and the sub-base station HBS2 of the second group and the sub-base station HBS5 of the third group do not interfere when using the same transmission resource RB (because there is no overlapping sub-coverage) Area). In addition, when the same transmission resource RB is utilized, the uplink/downlink between the primary base station MBS1 and the user equipment UE1 can be reduced in the present embodiment by using a directional antenna or adjusting transmission power. The interference of the HBS1~HBS6, the invention should not be limited thereto.

Another classification method allows the sub-communication device (including the sub-base stations HBS1~HBS6 and the user devices UE1, UE2) to detect whether they interfere with each other to generate sub-communication device information for the location server 310. The location server 310 divides the sub-communication devices whose mutual interference level is lower than a interference threshold into the same group. Please refer to Table 3. It is assumed here that the degree of mutual interference between the sub-communication devices in the first group and the second group is lower than the interference threshold.

As shown in FIG. 6 and Table 3, since the mutual interference degree of the sub-communication apparatuses of the same group is low, in this embodiment, the same transmission resource RB is allocated to the sub-communication apparatuses of the same group. Thereby, the main base station MBS1 and the sub base station HBS1~HBS6 can simultaneously transmit information without interfering with each other and reducing communication quality.

In addition, in order to maintain the communication state of the user devices UE1 and UE2 at the optimal quality, and the user devices UE1 and UE2 move from the main coverage area to the sub-coverage areas of the sub-base stations HBS1 and HBS2, respectively, the user can be used. The control rights of the devices UE1, UE2 are respectively transferred from the primary base station MBS1 to the sub-base stations HBS1, HBS2 to provide better quality of service. FIG. 7 is a control structural diagram of user equipments UE1 and UE2 respectively entering a sub-base station to convert control rights according to an embodiment of the invention.

As shown in FIG. 7, when the primary base station MBS1 first discovers that the user equipments UE1 and UE2 respectively move to the sub-coverage areas of the sub-base stations HBS1 and HBS2 (that is, the primary base station MBS1 initializes the user apparatuses UE1 and UE2), The primary base station MBS1 proposes location detection for the user devices UE1 and UE2 at the reference numeral 700, and then the user devices UE1 and UE2 also respectively transmit their respective locations at the reference numeral 710 to detect and confirm the user device UE1. UE2 is indeed located in the sub-coverage area of sub-base stations HBS1, HBS2. Thereafter, the primary base station MBS1 transmits the control transfer signal, the allocation of the transmission resources, and the related information of the user devices UE1, UE2 to the sub-base stations HBS1, HBS2, respectively, at reference numeral 720. Next, the primary base station MBS1 transmits the control transfer signal to UE1, UE2 at reference numeral 730, respectively, so that it knows that the control rights have been transferred to the sub-base stations HBS1 and HBS2, respectively. Moreover, the sub-base stations HBS1 and HBS2 also respectively inform the corresponding user devices UE1, UE2 at reference numeral 740 and start transmitting information.

In other embodiments, before receiving the control right transfer signal, the user equipment UE1, UE2 also detects and confirms whether the user equipments UE1, UE2 can actually communicate with the sub-base stations HBS1 and HBS2. Because the user equipments UE1, UE2 may be affected by buildings or other factors, although they are located in the sub-base stations HBS1 and HBS2 sub-coverage areas, they cannot communicate with the sub-base stations HBS1 and HBS2 (ie, not in the sub-bases). Within the communication range between HBS1 and HBS2). If the user equipment UE1 and UE2 cannot communicate with the sub-base stations HBS1 and HBS2, the user equipments UE1 and UE2 still use the primary base station MBS1 to transmit information. In addition, when the user equipment UE1, UE2 receives the control right transfer signal, and finds that the control right transfer cannot be performed due to communication factors or other reasons, the user equipment UE1, UE2 replies to the primary base station MBS1 to indicate the transfer of control rights. failure.

If the sub-base stations HBS1 and HBS2 detect that the user equipments UE1 and UE2 respectively enter the respective sub-coverage areas (that is, the sub-base stations HBS1 and HBS2 respectively initialize the user equipments UE1 and UE2), the sub-base station HBS1 A discovery signal is transmitted with the HBS 2 at reference numeral 750 to inform the primary base station MBS1. Thereafter, the primary base station MBS1 transmits the control transfer signal, the allocation of the transmission resources, and the related information of the user devices UE1, UE2 to the sub-base stations HBS1, HBS2, respectively, at reference numeral 760. Next, the primary base station MBS1 transmits the control transfer signal to the user devices UE1, UE2 at reference numeral 770, respectively, so that it knows that the control rights have been transferred to the sub-base stations HBS1 and HBS2, respectively. Moreover, the sub-base stations HBS1 and HBS2 also respectively inform the corresponding user devices UE1, UE2 at reference numeral 780 and start transmitting information.

As described in the foregoing embodiment, before the user equipment UE1, UE2 receives the control right transfer signal, the primary base station MBS1 also detects and confirms whether the user equipment UE1, UE2 can actually communicate with the sub-base stations HBS1 and HBS2. . In addition, when the user equipment UE1, UE2 receives the control right transfer signal, and finds that the control right transfer cannot be performed due to communication factors or other reasons, the user equipment UE1, UE2 replies to the primary base station MBS1 to indicate the transfer of control rights. failure. Other detailed procedures are included in the above embodiments, and are not described herein again.

When the main base station MBS1 and the sub base station HBS1 transmit information, they also transmit a recognition message to invite user devices with the same mobile communication technology to join the mobile communication system. The sensing signal may include information such as an operating frequency of the primary base station MBS1 or the sub-base station HBS1, a network bandwidth, a radio access technology (RAT) (eg, WIMAX, WiFi, 3GPP), and an expiration date. In addition, the user equipment may be shielded from signals by the building or other reasons, so that the communication quality for the sub-base station is worse than that for the main base station, so that the control right can be transferred to the communication by using the embodiment of the present invention. Good base station to improve communication status. It is assumed here that the user equipment UE1 is invited by the primary base station MBS1 or the sub-base station HBS1 to join the mobile communication system, as shown in FIG. FIG. 8 is a control structural diagram of a user device being invited to enter the mobile communication system according to an embodiment of the invention.

Before the user device UE1 is found to be invited, the primary base station MBS1 first transmits the allocation of the transmission information to the sub-base station HBS1 at the reference numeral 800. Next, the sub-base station HBS1 starts broadcasting its sensing signal to invite the user device UE1 to join. After the user equipment UE1 is invited, it is convenient for the sub-base station HBS1 to perform radio resource control (RRC) establishment and setting by using other frequencies in the label 820.

Next, when the user equipment UE1 wants to transfer from the primary base station MBS1 to the child base station HBS1, and the child base station HBS1 first initializes the user equipment UE1, the child base station HBS1 transmits one to the primary base station MBS1 at 830. The user device UE1 finds a signal. The primary base station MBS1 transmits the allocation of the transmission resources and the related information of the user equipment UE1 to the sub-base station HBS1 at reference numeral 840. Next, the primary base station MBS1 transmits a control transfer signal to the user equipment UE1 at reference numeral 850. The sub-base station HBS1 then broadcasts its sensed signal at other frequencies using reference numeral 860, and the user equipment UE1 also returns a control transfer completion signal at reference numeral 865. In other embodiments, before the user equipment UE1 receives the control right transfer signal, the primary base station MBS1 also detects and confirms whether the user equipment UE1 can actually communicate with the sub-base station HBS1 to avoid the occurrence of control transfer. This has led to a deterioration in communication quality.

If the primary base station MBS1 first initializes the user equipment UE1, the primary base station MBS1 detects the location of the user equipment UE1 at reference numeral 870, and at 815 the user equipment UE1 returns its location for confirmation. This is followed by the above-mentioned reference numerals 840 to 875, and will not be described herein. In addition, when the user equipment UE1 receives the control right transfer signal and finds that the control right transfer cannot be performed due to communication factors or other reasons, the user equipment UE1 can reply to the primary base station MBS1 to indicate that the control right transfer has failed.

Based on the above, the embodiment of the present invention receives the location of each sub-base station and the user device, thereby grouping the sub-action communication devices, and distributing the transmission resources by using the time sharing and frequency division mechanism, so that the sub-base station and the main base The station can transmit information at the same time and is almost undisturbed to maintain a good and stable communication quality. When the sub-base station finds that the user device enters its sub-coverage area, the main base station can transfer its control right to the sub-base station, so that the user device can obtain good communication quality.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

MS1~MBS2. . . Main base station

HBS1~HBS6. . . Sub base station

UE1~UEN‧‧‧user device

RB, RB1‧‧‧ transmission resources

200, 300‧‧‧ mobile communication system

310‧‧‧Location Server

320‧‧‧ Operator Network

330‧‧‧Internet

340‧‧‧Action Core Network

700~780, 800~875‧‧‧ label

S410~S450‧‧‧Steps

r‧‧‧The radius of the sub-base station's sub-area coverage area

Figure 1 illustrates six examples of possible interferences between a primary base station and a sub-base station in a mobile communication network.

2 is a schematic diagram of a mobile communication system using a reserved transmission resource manner to avoid interference according to an embodiment.

3 is a schematic diagram of a system for mobile communication according to an embodiment of the invention.

4 is a flow chart of a method for mobile communication according to an embodiment of the invention.

FIG. 5 is a control structural diagram of a method for mobile communication according to an embodiment of the invention.

FIG. 6 is a schematic diagram showing a grouping method according to an embodiment of the invention.

FIG. 7 is a control structural diagram of a user device entering a sub-base station to convert control rights according to an embodiment of the invention.

FIG. 8 is a control structural diagram of a user device being invited to enter the mobile communication system according to an embodiment of the invention.

MBS1. . . Main base station

HBS1~HBS6. . . Sub base station

UE1~UEN. . . User device

RB. . . Transmission resource

r. . . Radius of the sub-base station sub-area coverage area

Claims (31)

A method of mobile communication for a mobile communication system, the mobile communication system comprising a primary base station and a plurality of sub-communication devices, wherein any one of the sub-communication devices is a sub-base station and a user device, wherein the The sub-base station has a sub-coverage area and the location of the user equipment are located in one of the main coverage areas of the main base station. The mobile communication method includes: obtaining the sub-communication device information, wherein the sub-communication devices The information includes locations of the sub-communication devices; the sub-communication devices are grouped according to the locations of the sub-communication devices; and an allocation of transmission resources is obtained according to the grouping result, wherein the grouping result includes at least two groups of the sub-groups a communication device, and the at least two groups of the sub-communication devices are assigned different transmission resources; the sub-communication devices receive the allocation of transmission resources for controlling transmission and data transmission and data reception; and responding to the allocation The sub-communication devices that receive, are assigned the same transmission resource, enable the use of the same transmission resource. The method of claim 2, wherein the step of grouping the sub-communication devices comprises: sub-communicating the sub-communications that overlap when the sub-coverage areas of the sub-communication devices have overlapping portions The devices are divided into the same group. The method of claim 2, wherein the step of obtaining the allocation of the transmission resource according to the clustering result comprises: One of the sub-communication devices of each group is assigned the same transmission resource, wherein the relative distances of the sub-communication devices allocating the same transmission resource exceed a distance threshold. The method of claim 2, wherein the step of grouping the sub-communication devices comprises: detecting whether the sub-communication devices interfere with each other; and the mutual interference level is lower than a interference threshold The sub-communication devices are divided into the same group. The method of claim 2, wherein the obtaining the transmission resource according to the grouping result comprises: allocating the same or partially overlapping transmission resources to the sub-communication devices of the same group. The method of claim 3, wherein the sub-communication device comprises a first user device and a first sub-base station, and the method of mobile communication further comprises: when the first sub-base When the first user device is detected in the sub-coverage area, the first sub-base station notifies the main base station; the first sub-base station receives the allocation of the transmission resource and a first user device information; And the first user device receives a control transfer signal to enable the first user device to transmit and receive data via the first sub-base station. The method of claim 5, wherein the first user device receives the control transfer signal, the primary base The platform detects and confirms whether the first user device is indeed located within the communication range of the first sub-base station. The mobile communication method of claim 6, wherein the first user device receives the control transfer signal and finds that the control transfer cannot be performed, and the first user device replies to the control of the primary base station. The transfer of rights failed. The method of claim 3, wherein the sub-communication device comprises a first user device and a first sub-base station, and the method of mobile communication further comprises: obtaining the first user a location of the device; when the first user device is found to be located in the sub-area of the first sub-base station, the primary base station transmits the allocation of the transmission resource and a first user device information to the first sub-base station; And the first user device receives a control transfer signal to enable the first user device to transmit and receive data via the first sub-base station. The method of claim 9, wherein the first user device detects and confirms whether the first user device is located at the first before receiving the control transfer signal. Within the communication range of the sub-base station. The method of claim 5, wherein the first user device receives the control transfer signal and finds that the control transfer cannot be performed, and the first user device replies to the control of the primary base station. The transfer of rights failed. The mobile communication method according to claim 1, wherein the sub-communication device information includes a degree of interference between the sub-communication devices, a mobile device bandwidth requirement, and a location of the sub-communication devices. The mobile communication method according to claim 1, wherein the allocation of the transmission resource comprises a plurality of resource allocation units, each resource allocation unit comprising a frequency allocation, a time allocation, a frequency-time block, and an allocation. Power level, an assigned code level, or any combination thereof. A mobile communication system includes: a primary base station; a plurality of sub-communication devices, and one of the sub-communication devices is one of a sub-base station and a user device, wherein a sub-area of the sub-base station and the sub-base station The location of the user device is located in one of the main coverage areas of the main base station; and a location server is used to obtain information about the sub-communication devices, wherein the sub-communication device information includes locations of the sub-communication devices And grouping the plurality of sub-communication devices according to locations of the sub-communication devices, the main base station and the sub-base stations obtaining an allocation of transmission resources according to the grouping result, wherein the grouping result includes at least two groups of the group The sub-communication devices, and the at least two groups of the sub-communication devices are allocated different transmission resources, and the sub-communication devices are responsive to the reception of the allocation, and the sub-communication devices allocating the same transmission resource are enabled to be the same Use of transmission resources. The mobile communication system of claim 14, wherein when the sub-coverage areas of the sub-communication devices have overlapping portions, the location server divides the plurality of sub-communication devices that are overlapped into the same group. The system for mobile communication according to claim 15, wherein the location server allocates the same transmission resource to one of the sub-communication devices of each group, wherein the sub-communication devices with the same transmission resource are allocated. The relative distance exceeds a distance threshold. The system for mobile communication according to claim 14, wherein the sub-communication devices detect mutual interference, and the location server divides the sub-communication devices whose mutual interference level is lower than a interference threshold. The same group. The mobile communication system of claim 17, wherein the location server allocates the same or partially overlapping transmission resources to the plurality of sub-communication devices of the same group. The mobile communication system of claim 14, wherein the sub-communication device comprises a first user device and a first sub-base station, and when the first sub-base station detects the sub-area area In the first user equipment, the first sub-base station notifies the primary base station, the primary base station transmits the allocation of transmission resources and a first user equipment information to the first sub-base station, and the primary base station The station transmits a control transfer signal to the first user device to cause the first user device to transmit and receive data via the first sub-base station. The mobile communication system of claim 19, wherein the primary user station detects and confirms whether the first user device is located at the first before receiving the control transfer signal Within the communication range of the sub-base station. The mobile communication system of claim 19, wherein the first user device receives the control transfer signal and finds that the control transfer cannot be performed, and the first user device replies to the control of the primary base station. The transfer of rights failed. The mobile communication system of claim 14, wherein the sub-communication device comprises a first user device and a first sub-base station, after the main base station obtains the location of the first user device, When the location server finds that the first user equipment is located in a sub-area of the first sub-base station, the primary base station sends the allocation of the transmission resource and a first user equipment information to the first sub-base station, And the primary base station sends a control transfer signal to the first user device, so that the first user device transmits and receives data via the first sub base station. The mobile communication system of claim 22, wherein the primary user station detects and confirms whether the first user device is located at the first before receiving the control transfer signal Within the communication range of the sub-base station. The mobile communication system of claim 22, wherein the first user device receives the control transfer signal and finds that the control transfer cannot be performed, and the first user device replies to the control of the primary base station. The transfer of rights failed. A mobile communication method for one of a plurality of sub-communication devices in a mobile communication system, wherein the mobile communication system further comprises a main base station, and any of the sub-communication devices is a sub-base station and a user device One of the sub-base stations with a sub-coverage area and the user The location of the device is located in a main coverage area of the main base station, and the method for the mobile communication includes: transmitting the information of the sub-communication device, wherein the information of the sub-communication devices includes the location of the sub-communication devices; and receiving by the sub-communication device An allocation of transmission resources for controlling transmission and data transmission and data reception, wherein the allocation of the transmission resources is based on a clustering result, and the grouping results group the plurality of sub-communication devices according to the locations of the sub-communication devices; And in response to the receiving of the allocation, the plurality of sub-communication devices allocating the same transmission resource enable the use of the same transmission resource, wherein the grouping result includes at least two groups of the sub-communication devices, and the at least two groups of the The child communication device is assigned different transmission resources. The method of claim 25, wherein the sub-communication device comprises a first user device and a first sub-base station, and the method of mobile communication further comprises: when the first sub-base When the first user device is detected in the sub-coverage area, the first sub-base station notifies the main base station; the first sub-base station receives the allocation of the transmission resource and a first user device information; And the first sub-base station transmits a control transfer signal to the first user device, so that the first user device transmits and receives data via the first sub-base station. The method of claim 25, wherein the sub-communication device comprises a first user device and a first sub-base station, and the method of mobile communication further comprises: transmitting the first user The location of the device to the primary base station; when the first user device is found to be located in the sub-area of the first sub-base station, receiving the allocation of the transmission resource sent by the primary base station and a first user device information; And the first sub-base station sends a control transfer signal to the first user device, so that the first user device transmits and receives data via the first sub-base station. The method of claim 27, wherein the first user device detects and confirms whether the first user device is located at the first sub-base station before receiving the control transfer signal Within the communication range. The method of claim 2, wherein the first user device receives the control transfer signal and finds that the control transfer cannot be performed, and the first user device replies to the control of the primary base station. The transfer of rights failed. The mobile communication method of claim 25, wherein the sub-communication device information includes a degree of interference between the sub-communication devices, a mobile device bandwidth requirement, and a location of the sub-communication devices. The method of claim 25, wherein the allocation of the transmission resource comprises a plurality of resource allocation units, each resource allocation unit comprising a frequency allocation, a time allocation, a frequency-time block, and a A power level, an assigned code level, or any combination thereof.