TW490939B - Hot spot with tailored range for extra frequency to minimize interference - Google Patents

Abstract

A method and apparatus for minimizing interference in a wireless communication system. A base transceiver station transmits and receives over a first frequency band and a second frequency band. The maximum range of the first frequency band can be smaller than the maximum range of the second frequency band. Alternatively, the maximum range of the first frequency band can be larger than the maximum range of the second frequency band. Further, the maximum range of the second frequency band can vary based upon factors such as the capacity of the first frequency band and the amount of interference on the first frequency band. A control channel for the second frequency band which is measured for determining whether to handoff from the first frequency band to the second frequency band can be transmitted within the first frequency band.

Description

490939 A7 B7 V. Description of the invention (Background of the invention --- (Please read the notes on the back to write this page) ^ t two and increase the capacity of the cellular system, especially the increase of the cell capacity without increasing the system The amount of connection interference is related. The continuous growth of the telecommunications industry has made the capacity of cellular systems more important. The limitation of the frequency spectrum available for cellular communications requires that the network capacity of cellular systems be increased and applied to various situations. Although digital modulation can be increased by the system, the increase in modulation is not sufficient to meet the capacity and radio frequency range. Increasing the demand. In order to meet the growth needs, other increases such as reducing the cell size in the metropolitan area may be required. Volumetric methods. Interference between communication cells in close proximity creates additional problems, especially when using very small cells. Therefore, techniques to reduce intercellular interference are needed. 'TD M A and FDMA systems are used-the existing technology is to Cell groups are “clusters.” Between individual clumps, configure the communication frequency in such a way that the same communication frequency is used in different clumps (a single distance between cells is maximized). For a specific cell. This distance is commonly referred to as "frequency reuse, distance. When this distance increases, cells using the -communication frequency and distant cells using one of the same frequencies decrease. ^ Another way to increase capacity while reducing the interface is to use spreading Frequency modulation and eight-code multiple access (CDMA) technology. Direct serial cdma system in the standard = Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs: Information data stream is attached to-much higher symbol rate data stream transmission, It is sometimes called an extended series. Each symbol of the extended series is generally regarded as a chip. Each information signal is configured with a unique spreading code to generate the extended series, which is generated periodically. The information signal and The extended series is usually composed of multiplication and processing, sometimes called the information signal is extended or encoded. Multiple 4 paper sizes are applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 490939 A7 B7 V. Description of the invention (2) The extended information signal is transmitted by radio frequency carrier modulation and received by a receiver together as a composite signal. Each extended signal is repeated in frequency and time. All other encoded signals and related noise signals. By using the correlation between the composite signal and the extended series, the corresponding information signal can be isolated and decoded. Because the CDMA system covers each other in frequency and time, it is often called Self-interference. A method of reducing self-interference in a CDMA cellular system is to use power control. The power control of a cellular system is based on when the distance between the mobile station and the base receiving station decreases, and the mobile station or the base receiving station receives The mobile power required for an acceptable signal will also decrease. Similarly, as the distance between the base receiving station and the mobile station increases, the mobile station or the base receiving station will need to transmit an amount of transmit power required to receive a message. It will also increase. When the transmission power is increased, the amount of interference caused by other connections of the cellular system is also increased. Therefore, by using only the amount of power required to transmit signals between the base receiving station and the mobile station, the amount of interference in other connections of the system will be reduced. Figure ^ shows another way to reduce CDM interference. Cells A, β, and c spread communication signals in the -th-band frequency fl. These cells overlap each other in the shaded area “ο and 150, so the call made during the transfer has the least interference and is received at the frequency f 丨 and the base of cell A—the seven-person automatic station 110 is included in cell A by the king of one yuan. When the area is moved to the shadow of 14 °, the connection between cell A will also cause interference in cell B with frequency ^ and before cell β establishes a connection. To transfer the connection of Deng is called soft change. X has the same effect The condition of intercellular cells, which was found after the application of the cell system ^ -5- This paper size applies the Zhongguanjia Standard (CNS) A4 specification ⑵Q χ Norwegian (please read the precautions on the back first v- -A write this page) -1: 0,1. Printed by the Consumer Consumption Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 490939 A7 B7 Printed by the Employee Cooperative Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (3) Enter the channel configured in Cell B Increased requirements have led to unacceptable levels of interference. The area where the increase in demand occurs is technically called a "hot spot." In order to reduce the interference associated with a load cell, a second frequency band f 2 can be arranged on the transmitter of cell B, so that the transmitter of cell B can be frequency Or the frequency band f 2 communicates with the mobile station. Therefore, when the system detects an increase in the load of the frequency band q, the system determines the unacceptable level of interference. The system can transfer some mobile stations to the frequency band f2. Usually it can be based on the reservation of a specific frequency band. Whether the total number of users used by the system exceeds a predetermined threshold or whether the total uplink interference caused by the mobile station exceeds a predetermined threshold determines whether an increase in the load will cause an unacceptable level of interference. For example, suppose cell B uses a frequency band f〗 and frequency band f2 communicate with the mobile station, and cell A only communicates with the mobile station with frequency band f〗. It is also assumed that mobile station 1 10 communicates with the base receiving station of cell A with frequency band f and cell B with frequency band f 〖Starting resistance group. When the mobile station 1 1 〇 moves to the coverage area of cell B and leaves the coverage area of cell A heart, if the mobile station 丨 i 〇 and the base receiving station of cell B are established Then, the mobile station 1 1 0 ′S or the cellular system will decide to improve the signal quality of the mobile station 1 1 0 I and the interference amount of other mobile stations will be reduced. But before the connection is changed, the mobile station 110 will The mobile station B causes a lot of disturbances, because mobile station 110 and the mobile station of cell B will transmit in the same frequency band, that is, frequency band f. Therefore, although the blockage of cell B is released, the mobile station that acts on cell 3 with the frequency band still causes interference. π Another alternative to increase system capacity and reduce interference is to use localized microcells that can be built between heavy cells to handle areas where mobile users are dense. Microcells can usually be established on arterial roads such as crossroads or streets, and can be translated to the Family Standard (CNS) A4 on this paper scale (please read the precautions on the back first ^^ write this page) »! Binding · • Line.- 6- 490939 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (4) A series of micro cells provide the coverage of the traffic arterial highway. Micro cells can also be deployed in large buildings, airports and shopping malls. Microcells place additional communication channels close to actual needs, so increasing cell capacity while maintaining low levels of interference. The implementation of microcells in a giant cell usually requires different frequencies for the communication channels allocated to the microcell and the channels allocated to the giant cell. In addition, the implementation of microcells in giant cells requires different transmitters, i.e. base receiving stations, to communicate on the channels arranged on the microcells and the channels arranged on the giant cells. The maximum transmission power of these micro-cell receivers is usually lower than that of giant-cell receivers, and the interference caused by their transmission is very low. Although the use of micro-cells can reduce interference, the use of micro-cells also increases the cost of providing additional channels. The need to install additional transmitters and increase the cost of cell distribution due to the complexity of using micro-cells. In addition, because the feeder of a micro cell and the feeder of the giant cell are not often located in the same area, the maintenance cost related to the geographical separation is increased. In addition, although the microcell can reduce the load of the giant cell and the average power level used by the mobile station in the microcell, the microcell must also tolerate a high degree of interference. It is therefore desirable to increase the capacity of a cellular communication system without excessively increasing the existing connection interference of the cellular system. It is also desirable to increase the capacity of the cellular system without adding additional base receiving stations and associated additional costs. In addition, I hope to change to a cell with increased capacity without causing excessive interference with the existing connection of the cell. -Introduction to the invention The present invention solves these and other problems concerning cellular communication. Among them, the first and second frequency bands and the base receiving station for mobile station communication use ^ This paper standard applies to China National Standard (CNS) A4 specifications ( 210 X 297 mm) (please read the notes on the back ^^ write this page). 49U939 A7 B7 _ __ V. Description of the invention (5) The range is to make the second and second, # 1, minimize the interference . According to an embodiment of the present invention, the maximum range of the first frequency band is smaller than the maximum range of the first frequency band. According to the embodiment, the maximum range of the second frequency band is larger than the first frequency range. According to another embodiment of the present invention, the maximum range of the second frequency band will vary depending on the blocking of the first frequency band. Brief Description of the Drawings The present invention will now be described with reference to the accompanying drawings, in which: The cellular system illustrated in FIG. 1 includes three cells, one of which uses two frequency bands; A cell uses a second frequency band with a maximum extended range; FIG. 3 illustrates a cellular system where a cell uses a second frequency band with a reduced maximum range; FIG. 4 illustrates a cellular system where three cells are all Use a second frequency band with a narrowed maximum range; Figure 5A-5D illustrates a cellular system, where the maximum range of the second frequency band is a function of the first frequency band capacity and the first frequency band interference; Figure 6 illustrates changing the first frequency band Example method of the maximum range of the two frequency bands; FIG. 7 illustrates a cellular system in which the second frequency band of one cell has a reduced maximum range and the second frequency band of two cells has an enlarged maximum range; FIGS. 8A-8C illustrate in An exemplary embodiment of the present invention for a partitioned cell; and FIG. 9 illustrates a partitioned first frequency band and an omnidirectional second frequency band. The detailed description is for explanation instead of limitation, and the following descriptions are set, such as specific circuits, circuits-8-This paper size applies Chinese National Standard (CNS) A4 specification (210 X 297 mm) -IIH ϋ ϋ ϋ I ϋ II ϋ I > ϋ I (please read the note on the back first to write this page) I.-Printed by the Consumers 'Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 490939 A7 Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economics B7___ V. Description of Invention (6 ) I do n’t fully understand the present invention with specific details such as technology, etc. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments that differ from these specific details. In other cases, detailed descriptions of known methods, devices, and circuits are omitted 'so as not to confuse the description of the present invention. The horse simplifies the discussion of the present invention. The maximum range of the following frequency band fi will be regarded as the coverage area of a cell, the cell boundary, or the cell. Another person skilled in the art will understand that the maximum range of a frequency band, that is, the transmission at the base receiving station of the frequency band is the longest distance that the mobile station can receive the signal strength or quality above a predetermined threshold. Although a specific measurement and calculation performed by a mobile station is described below, those skilled in the art will know that the measurement and calculation can be performed instead of the cellular network. In addition, although specific calculations performed at the base receiving station are described below, those skilled in the art will know that these calculations can be performed in other parts of the cellular network, such as the radio network controller. FIG. 2 shows a first exemplary embodiment of the present invention, in which the base receiving station (not 颏 π) uses a maximum range larger than the frequency band f! That is, the maximum transmission power of the base receiving station of the mid-band q of the cell B is greater than the maximum transmission power of the base receiving station of the mid-band of the cell B. Therefore, the extended frequency band illustrated in Figure 2 extends to Cell VIII and C. The extension of the frequency band f2 will not seriously interfere with the connection of cells A and C, because some cells use the frequency band f $ for their connection. The range reduces interference with its connection when changing. For example, if the mobile station 110 communicates with the cell A and to the cell B at the cell A at the frequency f 1 and the mobile station 1 1 0 does not need to be at the cell, the field B is near to cause the frequency band f 1 at the cell B to be serious. Interference, just b--9

(Please read the note on the back _ fill out this page first) Install. -Ϋ n n n _ Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 490939 A7 _ B7 V. Description of the invention (7) Converted to frequency band f2. Another advantage of the extended range hotspot is apparent when the mobile station 110 leaves cell B with a frequency band of £ 2 and a connection communication. Because the frequency band extends to cell A, the mobile station does not need to be changed to the frequency band f of cell A before the mobile station 10 is in cell A. Since the mobile station 110 has a frequency band connection, it will not cause serious interference to the connection of the cell A using the frequency band connection. Before discussing additional exemplary change procedures in accordance with the present invention, the conventional change procedures are described below. In some traditional CDMA systems, control information is distributed to mobile stations via a technical channel or pilot channel. The control channel is allocated between two different physical channels, the common pilot channel (CPICH) and the common control physical channel (PCCPCH). Readers who are interested in further information about the control channel can refer to the registration name "Meth〇d Apparatus, and System for Fast Base Station Synchronization and Sector" on July 9, 1998

Identification "US Patent Application No. 09/1 12,689, which is incorporated herein by reference. When the PCCPCH performs the distribution control channel (BCCH), the mobile station uses the CPICH to perform the measurement. The BCCH transmits specific cell information, such as Cell identification and partition identification, system-related information such as transmission power, up-link interference power, and cell-specific neighboring cell information such as mixing codes used by neighboring cells, and neighboring cells that mobile stations should measure, etc. To find other transformed base receiving stations, the mobile station uses the supplied mixing codes to find the CPICH channels of nearby base receiving stations. Using these mixing codes, the mobile station can continuously measure the CPICH channels related to neighboring cells. In order to find the base receiving and sending station that may be the object of change. In traditional CDMA system, when the mobile station uses instant service such as talking -10-This paper size applies to China National Standard (CNS) A4 specification (210 X 297 mm) ) ------------ Install --- (Please read the precautions on the back to write this page) ·

At time t, the mobile station continues to send. Therefore, the mobile station cannot measure other frequencies without a standard CDMA system. But the second receiver increases the weight and complexity of the mobile station. A solution to make the mobile station measure other frequencies = k out t. The solution is to change the transmission cycle for the so-called "compressed mode." In the compressed mode, the information of the traffic channel is compressed in time and compared with one or more. Normal short message transmission. Because the traffic channel receives information in less time, the mobile station can use additional time to measure other frequencies. But squatting for the same amount of information means that a higher transmission rate is required. The driver ’s direction leads to an increase in the amount of power used, followed by a large amount of interference. Therefore, it is hoped that the energy will be measured on the CPICH channel transmitted at other frequencies without an additional receiver and the compression mode is not used. According to the knowledge, the second frequency band of the present invention The CPICH channel (CPICH channel 2) of q can be transmitted in frequency band f. For example, referring to FIG. 2 again, CPICH channel 2 can be transmitted by frequency band f2 in addition to frequency band f2. The base receiving station The mobile station can be notified by the BCCH of the channel code, CPICH channel 2 is transmitted in frequency band f. Similarly, the same mixing code used for transmission in frequency band G can be transmitted in frequency band G, but The channel code used is different from the CPICH channel 2 used to transmit CPICH channel 2 in band G. Therefore, the mobile station measures the CPICH channel 0 related to other bands when communicating in the first band. Another determines that the second band f 2 is in a The method of whether the connection between a specific mobile station and the base transmitting station has acceptable signal quality can be regarded as an offset method. According to this method, if the change is determined, the mobile station or the base transmitting station is notified of the CPICH transmitted by the frequency band fi. Channel 1 and cpiCH between channel 2 and channel -11-This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -------------- install · __ (Please read the note on the back first to write this page) Ru Lu. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 490939 A7 ------- B7__ V. Description of the invention (9) Power level deviation. Because of this action The station has measured the CpICH channel 1 of the frequency band fi, and can use this power level offset to determine whether the frequency band provides an accessible dual signal quality. For example, the receiving CPICH is generally reduced based on the power of the CPICH channel transmitted by the base transmitting station. Received by the base station Path loss determines change. Those skilled in the art will know that other parameters such as signal-to-noise ratio, received signal strength display (RSSI), delay, bit error rate (BER), frame error rate (FER), or these parameters can also be determined. Any combination decides to change. For this reason, referring to FIG. 2 again, the mobile station 1 1 0 will measure the received power of CPICH channel 1. When the mobile station 1 1 0 measures the CPICH channel 1 of the frequency band f! The channel can inform the action 1 of the transmission power of the frequency band fi and the power offset of the frequency band fi and the frequency band f 2 in the cell B. The mobile station 110 calculates the path loss in the frequency band f !. The mobile station 1 1 0 can estimate the path loss of the frequency band h by adding or subtracting the path loss of the cell B frequency band determined by the mobile station 1 j 0 and the offset 値. When the path loss measured by CPICH channel 1 falls below a certain threshold, the mobile station will decide to change from frequency band fi to frequency band f2. Similarly, when the path loss from CPICH channel 2 to transmission in frequency band f2 increases beyond a certain threshold, the mobile station will change from frequency band f 2 to frequency band fi. Those skilled in the art will clearly understand that the change decision is based on ^^ 81, CPICH received signal code power (RSCP), path loss is based on CPICH RSCP and CPICH energy per chip divided by the total received power density (Ec / No). Implement a similar threshold. FIG. 3 illustrates another exemplary embodiment of the present invention, in which the base transmitting station of cell b communicates with a frequency band having a maximum range smaller than the maximum range of the frequency band fi, that is, the maximum transmission power of the base receiving station frequency band f2 is smaller than the base receiving frequency. Delivery Station-12- This paper size is in accordance with Chinese National Standard (CNS) A4 (210 χ 297 mm) (Please read the precautions on the back first --- ^ write this page) ιπ_ · Staff of Intellectual Property Bureau, Ministry of Economic Affairs Printed by the Consumer Cooperative 490939 A7 B7 V. Description of the invention (1〇) Consumer-2 :: 2 power. Alternatively, a change can be made from the mobile station to the widest range of the adjustment frequency band fl & f2 from the most Ir &2; to the threshold of the receiving station. According to the predetermined and consistent embodiments of the present invention, the maximum range of the frequency band G and the boundary of 2 will not extend to the overlapping regions 140 and 50. The maximum range of the frequency will not extend to the overlapping regions 14 and 15 with the frequency band [2 of the connection— ^ 番 agger 2 The relay station can switch to the frequency band f in cell B without seriously interfering with cell A For the connection of the mid-band fi, when the mobile station switches from a frequency band to its dagger band, the close distance f between the mobile station and the cell A boundary will cause severe interference. In contrast, in the traditional system, the frequency band fl ^ is taken from the same value. In the overlap area i 4 〇, the mobile station can be switched from the frequency band f2 of the cell B to the frequency band fi of the cell B, and the mobile station will be in the fine line. It conveys in the frequency band and causes interference to users of the common channel (code) of the cell A band ^. It is assumed that the mobile station 110 communicates with the base receiving station in the frequency band f2 and the cell B. The mobile station 110 may decide that if the path loss is estimated to exceed 71, the mobile station 110 is changed to the frequency band 9 because the signal strength of the frequency band is higher. In addition, if the mobile station Π0 will communicate in a frequency band and the path loss is estimated to fall below 69dB, 4 mobile stations! 1 〇 will become the frequency band of cell B, because the mobile station 1 1 0 can use lower signal power while maintaining the same signal quality. The skilled person will know that this example 2dB difference between the critical changes is hysteresis to avoid the The mobile station 110 performs continuous changes to minimize the ping-pong effect of increasing the signal reception. If the base receiving station performs the calculation of the change, the receiving station in the place will determine whether the path loss estimate exceeds the above threshold μ. Although the above example only uses two frequency bands, those skilled in the art will know the uplink accuracy. Base installation --- (Please read the notes on the back to write this page first) · -13- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) V. Description of invention (11) Critical The same applies to a system with more than two aunts. The above-mentioned fe boundary effect is that the smaller mobile station will communicate with the frequency band f2, and at the same time, all other mobile stations within the "circle" will communicate with the base receiving station at the frequency band / ^: Cell 6. It is decided that the child system can be operated in the band f2. The group is a group of possible changes f I ~, 1 k A. The changes are made by the interference of the group band f. Negative ruling or volume trigger, while the base station's active mobile station Zengliang evades c collection, the station order child may change the band D2 of the active station in the group. In the case of interference, the mobile station should be merged into the frequency band f2, and it should be selected for communication between Ge and W. ^ ^ 2 Other criteria include selecting the mobile station with the lowest speed as the frequency band. Or, choose the closest to the base receiving station: the mobile station can be a band dagger, who chooses to move to the base receiving station at the Marcoma band f2, and chooses the action task based on the time of the cell: the above criteria Of combination. It will be clear to those skilled in the art that the same applies to all embodiments of the present invention. Compared with traditional systems that use only a single frequency band, using the largest range reduces the M-band f2. Another advantage is that the capacity and flexibility are increased. For example, when the system communicates in the second frequency band f2, there can be enough moving parts so that the first-revealed band resources can be reserved to provide stronger communication and better handling. For example, a fast-moving mobile station suddenly enters The condition of the cell. As shown in Fig. 4, the second frequency band limitation range shown in Fig. 3 can be extended so that more than one or all cells in the communication system use and use the second frequency band G with a range limitation. Therefore, the maximum range of the second frequency band of cells A, B, and C will not cover the overlapping regions 140 and 150. Since the second frequency bands do not overlap, the second frequency bands do not cause interference with each other. Therefore, the structure of Figure 4 enables all cells to have the above-mentioned advantages. -14- This paper size applies to the Chinese National Standard (CNS) A4 specification (21 × 297 mm) 490939 A7

Point 'without any additional interference between the second band q of each cell. In addition, those skilled in the art will know that depending on various radio communication conditions, such as helmets: radio wave propagation, line of sight conditions, cells A, B & c's second frequency band B may: some overlap occurs. If this occurs when a mobile station moves between cells, the system should change the mobile station from the frequency band f a of one cell to the frequency band f2 of another cell. For example, referring to FIG. 4 again, suppose that the mobile station moves from cell_ = to cell A, and communicates with the base receiving station of cell B in a frequency band. In addition, it is assumed that there is some overlap between the maximum range of the frequency band q of the cell B and the maximum range of the frequency band f2 of the cell A due to radio communication conditions. Because it is usually desired to perform a ^ -type change instead of a hard-type change, #determines the frequency band L of cell eight to provide the line weight: accounted for tm minus the number of accessible text, the mobile station will change from the frequency band of cell B [change = the frequency band of cell A f2. Another person skilled in the art will understand that it can be implemented in all the embodiments of the present invention where adjacent cells = the same frequency band has the largest overlap. 5A-5D illustrate another exemplary embodiment of the present invention, in which the maximum range of the frequency band frequency varies with the interference amount of the frequency band fl or the current or expected usable capacity of the frequency band frequency 2 as a function. Therefore, as shown in FIG. 5A, if no additional frequency band is needed, such as when the frequency band ^ has sufficient energy for all current connections? . The system uses the evaluation of the interference amount of the frequency band and the current number of connections in the frequency band to 2 meshes, and the reserved-partial maximum capacity enables the mobile station to have sufficient capacity to become a frequency band to determine whether the frequency band f 丨 has sufficient capacity. As shown in FIG. 5B, when the load of the frequency band f 丨 increases, and then the interference of the movable part acting in the frequency band increases, the base receiving station starts the frequency band G and sets the maximum power of the frequency band Q to the minimum power level. The minimum power level is selected so that the mobile station has enough area for the cell to use the frequency band [2 for mobile communication without immediately changing back to the frequency band f]. Mesh design frequency -15- This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 public love) I ----------- ^ installation—— C Please read the notes on the back first to write (This page) ▲ ^ τ · · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs

-n n n I 490939 A7

V. Description of the invention (13) The band f2 is used to reduce the load and interference of the frequency band, so the minimum power level is set to reduce the number of interference of the frequency band fi by using the frequency band f 2 to reduce the number of mobile stations communicating with each other. . In addition, the power level of the frequency band f2 is set so that the frequency band fi has sufficient capacity to handle a mobile station that wants to shift to the frequency band f !. When the number of mobile stations acting on cell B increases, as shown in Figures 5c and 5D, the maximum range of the frequency band f2 can be increased. This increase can be gradual or predetermined. Similarly, when the capacity requirement of cell B decreases, the maximum range of frequency band f 2 will decrease. Because the change between frequencies causes more disruption to the call than the soft one, it is desirable to keep as many mobile stations connected in the frequency band fl as f2 expands and contracts. FIG. 6 illustrates an example method of changing the maximum range of the frequency band f 2. In step 6 10, the capacity and interference of the frequency band f i are checked. At step 6 1 5 it is determined whether the current capacity of the frequency band is sufficient to provide the number of established connections and whether the interference level of the frequency band q is acceptable. The decision that the capacity of the frequency band q is sufficient includes a boundary so that the mobile station has enough capacity to continue to communicate into the cell B across the frequency band f i. If the interference level of the frequency band f 1 is unacceptable or the capacity is insufficient, follow the "No" path of the decision step 6 15 to increase the maximum range of the frequency band f 2i according to step 6 2 0. According to a simple exemplary embodiment of the present invention, the maximum range of the frequency band f2 is increased to change the frequency band f2 from the maximum range of FIG. 5C to the maximum range of FIG. 5D. If the frequency band f2 is not currently used by the base receiving station of the cell B, the frequency band f2 is started and set to the predetermined minimum and maximum range at step 620, as shown in FIG. 5A to FIG. 5B. After increasing the maximum range of the frequency band f 2, the system returns to step 6 10 to check the frequency band f 丨 capacity. If the frequency band fi capacity is sufficient and the frequency band h interference is acceptable, according to the decision -16- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back and fill in this page first) : Binding: Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7

490939 V. Description of the invention (14) Go to step 6 1 5 "Yes, the path will determine whether the capacity of the frequency band f is excessive according to step 6 2 5. If the frequency band is excessive, if it is in the center of the frequency band; there is some pre-footing The number of channels is not used, according to the leaving decision step 6 2 5 < the "yes" path is reduced according to step 6 30 the maximum range of the frequency band. The decision of excessive capacity should also explain the mobile station connection that can be changed to the frequency band fi According to a simple exemplary embodiment of the present invention, the maximum range of the frequency band is reduced to explain the frequency band f2 from the maximum range of FIG. 5 c to the minimum range of FIG. 5 b. The capacity of the frequency band fi is determined to be excessive and there are no mobile stations. When using the dagger, if the frequency band f2 has been set to the minimum output transmission power, the base receiving station can choose to disable the frequency band G, as explained from Figure 5B to Figure 5 A. After the maximum range of the frequency band q is reduced, The system returns to step 6 and checks the capacity and interference of the frequency band fi. Similarly, if it is determined that the capacity of the frequency band fi is not excessive, the system returns to step 6 1 0 to check the frequency band in accordance with the "No" path leaving the decision step 6 2 5 f 1 capacity and interference. Those skilled in the art will understand that before the maximum range of the frequency band f 2 is reduced, any mobile station may withdraw because it may be ordered to perform the reduction of the frequency band into a frequency band. FIG. 7 illustrates an exemplary embodiment of the present invention, in which adjacent cells use the techniques described in FIGS. 2 and 3. Therefore, cells a and C use a frequency band f 2 of an extended range, where the frequency band f 2 is extended to the maximum of the cell B. Cell B uses a reduced frequency band f * 2 ', in which the maximum range of the frequency band f2 does not extend to the overlapping regions 14 and 150. The embodiment illustrated in FIG. 7 is slightly different in the positions where the band fi and the band £ 2 can perform the transfer. This combination of frequency band f 2 expansion and limitation can be used to handle high data rate users who are usually close to the site (provided by the smaller f2 cell). Utilizing the expanded frequency band f 2 of cells A and C, these high data rate users -17- This paper size applies to China National Standard (CNS) A4 specifications (210 X 297 public love) (Please read the precautions on the back- -Write this page) · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 490939 A7 B7 V. Description of the invention (15) Can leave cell B without causing any interference in the connection of frequency band f. Although the present invention is described with reference to single-region cells, the present invention is also applicable to the multi-region cells shown in Figs. 8A-8C. Figure 8 Eight Explanation—The three partitioned cells responsible for the three partitioned antennas (not shown) in the _ system, where each = zone uses the -th-frequency h effect. Although these partitions are described with clear cell boundaries, those skilled in the art will know that there will be overlaps between the coverage areas of the partitions to provide minimal disruption to making < calls. FIG. 8B illustrates the third zone cell, which has the largest reduced range in the second frequency band f2 in the zone. The maximum range of the frequency band f 2 in FIG. 8B is set so that the frequency band f 2 does not expand to the coverage area of the partitions 2 and 3, including any overlapping areas not shown. The advantages of the embodiment illustrated in Fig. 8b are similar to the maximum range reduction embodiment illustrated in Fig. 3. In addition, similar to FIG. 4, each zone in FIG. 8B can use a frequency band with a maximum range reduction, and each zone can have the advantage of reducing the second frequency band. FIG. 8C illustrates an antenna and transmission from the band 1 in which the frequency band fi is propagated, and the frequency band q is extended, but the maximum range of the band q overlaps with the regions 2 and 3. Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs as the expansion band of the zone cell. The advantages of the second frequency band are similar to those of the single zone cell expansion range illustrated in Figure 2. In addition, the above-mentioned FIG. 5A-5D concerning the single-region cell of the present invention "breathing control," the embodiment can be implemented on multi-region cells. For those who are interested in further information on the arrangement of zoned cells, zoned cell antennas and transmitters, please refer to the US patent. Application ν〇 · 〇9 / 〇53,95 1 "Meth〇d and

"System for Handling Radio Signals in a Radio Base Station", incorporated herein by reference. The technology of a mobile cell in a partition cell can be called a soft change technology in the frequency band q and several partitions. Further information on the partition cell and soft changes is interesting. -18-297 mm) Chinese paper standard (CNS) A4 ^ " ^ is applied to paper scales. 490939 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (16) Those who are interested should refer to 1998. US Patent Application No. 09/1 12,689 entitled "Method, Apparatus, and System for Fast Base Station Synchronization and Sector Identification" was registered on July 9, 2014, and is incorporated herein by reference. When the action station is located in a frequency band and several For zone communication, the path loss of the base receiving and transmitting station can be estimated by using the lowest path loss among all the zones of the cell communicating with the mobile station. Because of this change, the decision can be based on a path with many reflections. q Move to frequency band This technique can avoid the aforementioned "ping-pong" effect. These tail shots are the result of the base receiving station signal bouncing to objects such as buildings before reaching the mobile station, which can cause path losses 値 higher than the path losses due to the mobile station and the base receiving station 値. Because the change between frequencies can cause greater interference than the change in frequency and may miss calls, as long as a partition can maintain communication, mobile station communication should be avoided. Change from frequency band f2 to frequency band q. Figure 9 illustrates a cell with three zones carrying a band dagger, while the band dagger is transmitted using an omnidirectional transmission architecture. According to this embodiment, a mobile station communicating in the frequency band ^ can move near the base station without performing a soft change. The omnidirectional second frequency band f2 reduces the load on the network due to fewer signals, especially in the center of the cell. In addition, the omnidirectional second-band dagger can use a less complex power control architecture, which can reduce the required resources. For example, the control architecture is less complicated, and fixed power can be used in the downlink. Some aspects of the invention are replaced by implementing mobile station control changes. The skilled person will understand that network control changes can be implemented instead. The present invention uses a non-limiting range t > a. Exemplary examples are described. Those who are proficient in this technology can make changes and changes to the original patent application and deviate from the spirit and scope of the attached patent application. Heart I 1 Hairless -19

(Please read the notes on the back first and write this page) Binding.

Claims (1)

490939 έ88 C8 ~ ------- 6. Scope of patent application 1. A cellular communication system, including: (Please read the notes on the back first and write this page): Basic delivery station. The first frequency band of the first to the maximum range and the second frequency band with a second largest range transmit signals, wherein the first and second maximum ranges overlap and the second maximum range among them: in the first and the maximum range. 2. The cellular communication system according to the scope of the patent application, wherein the maximum range defines a boundary of a first cell. 3. = No. of patent application scope! The cell-based communication system of this item, in the first place, takes a large area to form a zone boundary of a multi-region cell. 4. The cellular communication system with the scope of patent application No. 丨, wherein the second maximum range overlaps with the maximum range related to the first frequency band transmitted by the other base receiving station. 5. The cellular communication system according to item 1 of the patent application scope, wherein the signal is transmitted in accordance with a code division multiple access architecture (CDma).丨 Line 6: The cellular communication system according to item 1 of the patent application scope, wherein the base transceiver station transmits the control channel of the second frequency band in the first frequency band. 7. If the cellular communication system in item 1 of the scope of patent application, further includes: a mobile station, where the base receiving station transmits information about the first frequency band and the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs to print the second frequency band Information to the mobile station, and the mobile station calculates an offset 値 based on the transmitted information. 8. If the cell-type communication system of item 1 of the scope of patent application, the system is calculated as the power degree difference function between the first frequency band and the second frequency band: 2 Offset 値. 9 · If the cellular communication system of the 8th in the scope of patent application, the nuclear system-20-this paper size applies to China National Standard (CNS) A4 specifications (210 X 297 mm) 490939 A8 B8 C8 D8----- '------_ VI. Apply for a patent to calculate the path loss estimate of the second frequency band control channel in the first frequency band 0 * 10. If the cellular communication system in item 6 of the scope of patent application, further includes: A mobile station, wherein the mobile station calculates a path loss estimate of a second frequency band control channel in the first frequency band. 11. If the cellular communication system of item 8 of the patent application scope further includes: a mobile station, wherein the mobile station uses the offset to calculate the path loss estimate. _, 12 · If the cellular communication system of item 1 of the patent application scope, wherein the _ frequency band and the second frequency band each include multiple frequencies. 13. If the cellular communication system according to item 12 of the patent application scope, wherein the frequencies of the first frequency band and the frequencies of the second frequency band are different. 14. A cellular communication system comprising: a base transmitting station transmitting signals via a first frequency band having a first maximum range and a second frequency band having a second maximum range, wherein the first and second maximum The ranges overlap and the second maximum range is greater than the first maximum range. 15. If the cellular communication system in item 14 of the scope of patent application, it also includes: Printed from another base receiving station by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The second maximum range of the second frequency band sends a signal, wherein the first and second maximum ranges overlap and the second-maximum range is smaller than the first maximum range. 16. If the cellular communication system of item 14 of the scope of patent application, the coverage area related to the second largest scope will not be related to other base receiving and sending stations-21-This paper has passed the Zhongguanjia standard ( CNS) A4 specification (21 () χNuo Gong issued WU939 A8 B8 C8 D8, the frequency coverage area of the patent application scope overlaps. 17. If the cellular communication system of item 14 of the patent application scope, the first maximum scope defines a Boundary of the first cell. 18. For example, the field cell communication system of the scope of application for patent No. 14 wherein the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints the largest range to define the boundary of a multi-region cell. The cellular communication system of the 14th scope of the patent application, wherein the signal is transmitted in accordance with the code division multiple access architecture (CDMA). 20. For the cellular communication system of the 14th scope of the patent application, the base receives and sends The control channel of the second frequency band is transmitted in the first frequency band. 21. The cellular communication system of item 14 in the scope of the patent application, wherein the base transmitting station is calculated as the first frequency band and the second frequency band. One of the power degree difference functions is offset 22. 22. The cellular communication system of item 20 of the patent application scope further includes: a mobile station, wherein the mobile station calculates the path of the second frequency band control channel in the first frequency band Loss estimation. 23. If the cellular communication system in item 21 of the patent application scope, further includes: a mobile station, wherein the mobile station uses the offset to calculate the path loss estimate. 24. if the patent application scope is 14 Item of the cellular communication system, wherein the first frequency band and the second frequency band each include a plurality of frequencies. 25. The cell-type communication system according to item 24 of the patent application scope, wherein the frequencies of the first frequency band and the These frequencies in the second frequency band are different. 26. A base receiving station includes: a device for transmitting signals through a first frequency band with a first maximum range ^ This paper standard applies to China National Standard (CNS) A4 Specifications (210 X 297 mm) ----- II II--II 1. II (Please read the notes on the back ^^ write this page) .- • Cable-490939 A8 B8 _ §8s_ VI. Patent Application Range; and Two of the largest range-a device for transmitting signals in the second frequency band; wherein the maximum range of the second frequency band changes according to the capacity of the first frequency band. 27. For example, the base receiving station of the 26th scope of the patent application, wherein the base receiving station When there is sufficient capacity in the first frequency band, it will not be transmitted through the second frequency band. 28. If the base receiving station of item 27 of the patent application scope, the additional connection in the first frequency band will not cause the first frequency band The first frequency band has sufficient capacity when the existing connection is excessively interfered. 29. For example, the base receiving station of item 26 of the patent application range, wherein the signal is transmitted according to a code division multiple access (CDMA) architecture. 30. If the base receiving station of item 26 of the scope of patent application, the maximum range of the second frequency band also changes according to the position of the mobile station. 31. A method for minimizing interference at a base receiving station, comprising the steps of: transmitting a signal through a first frequency band having a first maximum range; and passing a second frequency band having a second maximum range Send a signal; printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economics, where the maximum range of the second frequency band varies according to the capacity of the first frequency band. 32. The method according to item 31 of the scope of patent application, wherein the base transmitting station will not transmit through the second frequency band when the first frequency band has sufficient capacity. 33. If the method according to item 32 of the scope of patent application, wherein the additional connection in the first frequency band does not cause excessive interference to the existing connection in the first frequency band, the -23-th paper standard applies Chinese National Standard (CNS) A4 size (210 X 297 mm) 490939 One band has sufficient capacity. The maximum of the second frequency band includes the following step 3 ": The method for applying for item 31 in the scope of patent application, wherein the second deaf garden also changes according to the location of the mobile station. Μ · A step to minimize interference in the wireless communication system: Send signals in the first frequency band in a large range; Send signals in the second frequency band with the second largest range; Guide mobile stations from one frequency band to another frequency band according to a pre-compliance criterion; where the maximum range of the second frequency band changes 36. If the method of applying for the scope of the patent No. 35, the predetermined criterion is the travel speed of a mobile station. 37. If the method of applying for the scope of the patent No. 35, the predetermined criterion is to perform a force station to send Near the base receiving and transmitting stations in the first and second frequency bands. 38. The method of item 35 in the scope of patent application, wherein the predetermined criterion is the direction in which a mobile station passes. 39 ·-A mobile station is moved by a first A method for changing a frequency band to a second frequency band includes the following steps: transmitting a first control channel of the second frequency band in the first frequency band; and printing a notice by an employee consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs The mobile station transmits the first control channel in a first frequency band; measures a predetermined criterion of the first control channel; if the predetermined standard of the first control channel exceeds a critical threshold, the mobile station transmits in the second frequency band 40. If the method of item 39 of the scope of patent application is applied, the method further includes the following steps: transmitting the second control channel of the second frequency band in the second frequency band, in which -24- this paper standard is applicable to Chinese National Standards (CNs) A4 specification (21 × X 297 mm) 490939 Printed by employees' cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A8 B8 C8 D8 VI. Patent application scope The first control channel of the second frequency band and the second control channel of the second frequency band include the substance Receive the information of the mobile station on the second control channel of the second frequency band. 25- This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm)