TWI398150B - Method and apparatus for neighbor cell synchronization - Google Patents

Description

Synchronization method and device for adjacent communication cells

The present invention relates to wireless communication technologies, and more particularly to a method and apparatus for a mobile communication unit to synchronize neighbor cells.

Wireless mobile communication systems are becoming more and more popular, and they can be used not only as telecommunication systems for voice exchange, but also as transmission media for digital data. Wireless mobile communication systems basically include communication between Mobile Communication Units such as mobile phones and Base Stations. The communication range covered by the base station is called a cell (sometimes called a cell, and this article is collectively referred to as a cell). A single mobile communication unit may be located in a reachable area of multiple cells.

In order to ensure the smooth communication of external communication, the mobile communication unit and the cell in which it communicates, that is, the neighboring cell, must be synchronized. Synchronization here refers to confirming the time difference between the mobile communication unit and the neighboring cell, so that the mobile communication unit can quickly acquire the base station identity code (Base Station Identity Code or BSIC) and other synchronization information to facilitate the necessary base station conversion. (handover).

The GSM (Global System for Mobile Communication) protocol uses a Time-Division Multiple-Access mechanism that divides each frame that lasts 4.615 milliseconds into eight time slots. Each time slot can carry user data or control data. A number of logical channels (Logic Channels) can be defined depending on the type of data carried. Basically, the logical channel carrying the user data is called TCH (Traffic Channel or Transport Channel), and the person carrying the control data is called Control Channel. The control channel includes an FCCH (Frequency Correction Channel or Frequency Correction Channel), SCH (Synchronization Channel or Synchronization Channel), BCCH (Broadcast Control Channel or Broadcast Control Channel), and CCCH (Common Control Channel or Common Control Channel). The above BSIC information is located in the SCH. The synchronization of the mobile communication unit to the neighboring cell lies in searching and interpreting the frequency corrected channel FCCH and the synchronized channel SCH of the neighboring cell.

The mobile communication unit may have an environment of up to 6 to 12 neighboring cells. In particular, in the GSM protocol, the mobile communication unit needs to process at most 6 neighboring cells, and it must scan each neighboring cell within about 30 seconds. Synchronization of a single neighboring cell is required in about 2 to 5 seconds. Since the mobile communication unit has to switch between the state in which the synchronous action is performed and the normal state, it consumes a considerable amount of power to switch between these states. Therefore, it is necessary to propose an efficient method for synchronizing neighboring cells so as to quickly monitor neighboring cells before saving power.

It is an object of the present invention to provide a method for a mobile communication unit to synchronize neighboring cells that can effectively reduce battery power consumption.

Another object of the present invention is to provide a method of selecting neighboring cells for synchronization.

It is still another object of the present invention to provide a method of setting a sync pane for neighboring cell synchronization.

It is still another object of the present invention to provide a mobile communication unit that implements the above method.

According to an embodiment, the present invention provides a method for a mobile communication unit to synchronize neighboring cells, comprising the steps of determining whether a mobile communication unit is in a first specific communication state suitable for neighboring cell synchronization in a particular wide synchronization pane The specific wide sync pane range encompasses a plurality of consecutive frames; and a particular logical channel that searches for or interprets neighboring cells within the scope of the particular wide sync pane.

The present invention also provides a method for a mobile communication unit to synchronize neighboring cells, comprising the steps of: determining whether the mobile communication unit is in a first specific communication state suitable for neighboring cell synchronization in a particular narrow synchronization pane, wherein The specific narrow sync pane range covers the entire range of a specific box, the first part range of the box on the specific box, and the second part range of the next box of the specific box; and searching or solving within the specific narrow sync pane range described above Translate specific logical channels of neighboring cells.

The invention also provides a scheduling method for selecting a neighboring cell to be synchronized, the scheduling method comprising the steps of: initializing a counter to a first specific value; changing the counter to a unit value when other neighboring cells are selected; and viewing the counter Determining whether a neighboring cell to be synchronized can be selected, wherein the neighboring cell to be synchronized can be selected only when the counter is equal to the first specific value; and setting the counter to a second specific when the neighboring cell to be synchronized is selected value.

The invention also encompasses a mobile communication unit that performs the above method.

The first figure shows a method for a mobile communication unit to synchronize neighboring cells in accordance with an embodiment of the present invention. In step 102, the neighboring cells to be synchronized are selected according to a scheduling mechanism. Step 104 determines a synchronization window (referred to as a sync window) range for the neighboring cell to be synchronized according to the communication state of the mobile communication unit. Step 106 searches for or interprets a particular logical channel of the neighboring cell within the scope of the sync pane. The details of each step are further explained below.

See step 102. Generally, the wireless communication environment in which the mobile communication unit is located usually has multiple neighboring cells at the same time. Step 102 determines whether the neighboring cell can be selected for synchronization based on the content of the counter allocated to the neighboring cell. The second figure shows an example of a scheduling method in accordance with an embodiment of the present invention. In this example, the number of neighboring cells that the mobile communication unit following the GSM protocol can synchronize is at most equal to six. The scheduling method comprises the following steps that are not necessarily performed in succession: first a given set of neighboring cell sequences (blocks 200) arranged according to signal strength, those skilled in the art will appreciate that the steps described in block 200 may be timed or otherwise The signal is driven to perform, and a sequence of neighboring cells that may be provided by the embodiment of the present invention is not necessarily arranged according to signal strength, and may be arranged according to dynamic radio access capacity, view, performance, and any combination thereof of the base station. Its sequence. Then, when each neighboring cell in the sequence is unchanged, a counter is allocated to each neighboring cell in the sequence (block 201). In an embodiment, although the strength of each neighboring cell changes its ranking in the sequence, its corresponding counter remains unchanged. Each counter initial value is set to 0 each time a new counter is allocated (block 202). When any neighboring cell is selected, if the counter of the other neighboring cell is greater than 0, it is decremented by 1 (block 203). A neighboring cell in the sequence whose first counter is 0 is selected for synchronization (block 204). And setting the counter of the selected neighboring cell to the maximum number of cells in the sequence minus 1, as in the mobile communication unit of the GSM protocol, 5, meaning that the number of neighboring cells that can be synchronized is reduced by 1 (block 205) . Each time the mobile communication unit obtains a new set of neighboring cell sequences, each counter can be reassigned to correspond to a new neighboring cell, and its initial value is reset according to the above manner. According to the above scheduling method, each of the neighboring cell sequences can be selected for synchronization. If the selected neighboring cell fails to synchronize more than a certain number, for example 2 times, it will be excluded from the subsequent neighbor cell selection procedure until a new set of neighboring cell sequences appears to save power.

It should be understood by those skilled in the art that the scheduling mechanism of the present invention is not limited to setting each of the above counters to the above specific value or decrementing its contents. For example, the initial value can be set to any specific value, the decrementing procedure can be replaced by changing a unit value, and the counter of the selected neighboring cell can also be set to other specific values. Such variations are intended to be included within the scope of the invention and are subject to the scope of the patent application.

Returning to the first figure, see step 104, which determines the synchronization pane range for the neighboring cells to be synchronized based on the communication state of the mobile communication unit. The sync pane refers to the time when a mobile communication unit is used to synchronize neighbor cells. Since the synchronization action is mainly to search for a specific logical channel of a neighboring cell, such as FCCH (Frequency Correction Channel or Frequency Correction Channel), the synchronization pane is sometimes also referred to as a search window. The frames of the mobile communication unit that can be used to perform neighbor cell synchronization differ greatly in the idle mode and the non-idle mode. For example, when the communication state of the mobile communication unit is in the idle mode, there is no large amount of data exchange between the base station and the base station. At this time, there may be a greater flexibility to select consecutive frames to monitor the neighboring cells. However, when the mobile communication unit is in the call mode, almost all of its frames are the transport channel TCH including the data receiving time slot and the data transfer time slot, and the frame density that can be used for the neighbor cell synchronization is extremely small. For example, in the GSM system, every 26 frames contain only one idle frame available for the neighboring cell synchronization.

In any communication state, since the mobile communication unit and the neighboring cell may have timing differences and an overhead required for state switching, the synchronization pane must last for more than one entire frame or at least nine time slots. According to the method of the present invention, the duration of the synchronization pane is extended to a part of the time range of the previous frame and the next frame to ensure that after deducting the above-mentioned state switching fixed time and considering the timing difference, it is still sufficient to cover the specific burst to be searched. (burst).

The third figure shows a schematic diagram of the extent of a sync pane in accordance with an embodiment of the present invention. According to the agreement of the GSM system, the duration of a single frame can be in units of Q bits (Quarter Bit), where one Q bit occupies a time equal to one quarter of a bit. A box has 8 time slots, each time slot or burst occupies 156.25 bits, so each box contains 156.25x8=1250 bits, meaning 5000 Q bits. The third figure shows that the synchronization pane lasts for a total of 5000 Q-bits covering the box N, and is expanded to the previous box N-1, X1 Q-bits, and the next box, N+1, X2 Q-bits, where X1 And the number of Q bits contained in X2 is between 312 (or 625/2) Q bits to 625 Q bits, meaning that the lengths of X1 and X2 are between half a time slot and one time slot. between. Therefore, the sync pane SW covers a total of 5000+X1+X2 Q-bits, which contain at least 9 time slots.

As mentioned above, when the communication state of the mobile communication unit is in the idle mode, there is no large amount of data exchange with the base station, so almost all the frames can be used to monitor the neighboring cells. The fourth figure shows a typical GSM system multi-frame logical channel configuration diagram, where F denotes the frequency correction channel FCCH, S denotes the synchronization channel SCH, I denotes the idle frame and the number indicated represents the corresponding logical channel coverage. The frame number. For example, the frame number 0 is a frequency correction channel frame FCCH, the frame number 1 is a synchronous channel frame SCH, the frame numbers 2 to 5 are a broadcast control channel frame BCCH, and the frame numbers 6 to 9 are one can be regarded as a paging channel frame PCH ( Paging Channel) Common Control Channel Box CCCH (Common Control Channel). As can be seen from the fourth figure, since it is necessary to synchronize the nine time slots as previously described, the present invention requires at least a sync pane of 11 consecutive frames to be sufficient to ensure that the frequency corrected channel frame FCCH is included. In an embodiment of the invention, if the next synchronization channel frame SCH is to be interpreted, 12 frames may be covered. Considering factors such as the time difference of neighboring cells and the state switching of the mobile communication unit, the synchronization pane can contain 13 frames.

In accordance with another embodiment of the present invention, the synchronization pane is selected in the idle mode as close as possible to the paging channel frame PCH. For example, still referring to the fourth figure, if the paging channel frame PCH is located in the shared control channel frame CCCH of numbers 6 to 9, the synchronization pane can be located within the frame of numbers 10 to 21. If the paging channel frame PCH is located in the shared control channel frame CCCH of numbers 26 to 29, the synchronization pane can be located within the frame of numbers 30 to 41. In this way, the number of times the mobile communication unit is switched can be reduced to achieve power saving.

According to another embodiment of the present invention, the mobile communication unit is in a non-idle mode including a special logical channel, and a continuous frame can also be used as the synchronization pane. For example, in the GSM system, if the multi-frame configuration of the non-idle mode includes the SDCCH (Standalone Dedicated Control Channel) logical channel, the synchronization pane will be different according to the type of the independent dedicated control channel frame SDCCH. The range of consecutive boxes. The period of the independent dedicated control channel frame SDCCH is 102. The following table shows the possible sync pane positions corresponding to the different independent dedicated control channel frames SDCCH of the embodiment of the present invention.

The call mode is the busiest state of the mobile communication unit. As mentioned above, under the GSM system, every 26 frames contain only one idle frame for synchronization of neighboring cells. According to another embodiment of the present invention, the sync pane may include discontinuous panes in the call mode, each pane conforming to the conditions described in the third figure. As with the above principle, as long as the range of such discontinuous panes exceeds only 11 frames, it can be guaranteed that the frequency correction channel frame FCCH to be searched is not lost.

Returning to the first figure, step 106 searches or interprets the specific logical channel of the neighboring cell within the scope of the synchronization pane. As described above, this step searches for the frequency corrected channel frame FCCH and/or the interpreted synchronization channel frame of the neighboring cell. SCH. Depending on the current synchronization state of the neighboring cell and the current communication state of the mobile communication unit, the neighboring cell synchronization method according to the present invention sets various synchronization panes such as those described above and attempts to search for the frequency corrected channel block FCCH and/or the interpreted synchronization channel frame SCH. And depending on the result of the search or interpretation, the synchronization state of the neighboring cells is changed. The fifth figure summarizes the above various conditions in the GSM system in more detail, as detailed below.

The fifth diagram shows the neighbor cell synchronization procedure in accordance with an embodiment of the present invention in GSM or its compatible system. Step 501 selects a neighboring cell NC, which can select the neighboring cell NC using a scheduling mechanism such as that shown in the second figure, as in step 102. Step 502 determines the synchronization status of the neighboring cell NC. When the mobile communication unit successfully locates the frequency corrected channel frame FCCH of the neighboring cell NC and does not undergo any failed synchronous channel frame SCH interpretation, the status of the neighboring cell NC is synchronized, otherwise it is not synchronized. Step 503: setting a synchronization pane for the synchronized channel frame SCH for the synchronized neighboring cell NC and attempting to interpret the synchronization pane. If the synchronization channel frame SCH fails to be interpreted, the synchronization state of the neighboring cell NC is set to be unsynchronized. Otherwise, Set to synced. As described above, the frequency corrected channel frame FCCH of the synchronized neighboring cell NC is already located (and has not undergone any failed SCH interpretation), so that the relative position of the channel frame FC and the frequency corrected channel frame FCCH can be inferred according to the relative position of the synchronization channel frame SCH and the frequency correction channel frame FCCH. The next sync channel frame SCH is in the current sync pane position. Step 504 determines the width of the synchronization pane according to the communication state of the mobile communication unit. When the mobile communication unit is in the idle mode or in the non-idle mode configured with the independent dedicated control channel SDCCH, the continuous frame can be selected more flexibly as the sync pane. This mode is referred to herein as the wide pane mode or wide. Sync pane mode. Conversely, when the mobile communication unit is in a busy state such as a call mode, only one box can be selected, such as every 26 boxes, as a sync pane. This mode is referred to herein as a narrow pane mode or a narrow sync pane mode. . Of course, in accordance with the present invention, such narrow sync panes may conform to the conditions shown in the third figure. Step 505 searches the frequency correction channel frame FCCH of the neighboring cell NC in a wide synchronization pane mode and interprets the synchronization channel frame SCH. If both are successful, the synchronization state of the neighboring cell NC is set to be synchronized, otherwise, it is set to be unsynchronized. . Step 506 searches for the frequency corrected channel frame FCCH of the neighboring cell NC in the narrow sync pane mode. If the search succeeds, the process jumps to step 503 to prepare for the interpretation of the synchronized channel frame SCH (step 507). If the search fails and the number of failures exceeds 11 Then, the process jumps to step 501 to select the next neighboring cell (step 508).

The invention also includes apparatus for performing the above methods, such as a mobile communication unit. The sixth figure shows a typical architecture of a mobile communication unit 600, which includes a processing module 602, a human interface 604, a memory module 606, a digital signal processing module 608, and a radio frequency transceiver module 610. The processing module 602 can be a central processing unit, such as a microprocessor architecture, that cooperates with a program or instruction code stored in the memory module 606 to perform specific actions, such as the synchronized neighboring cells according to the present invention. method. The programs or instruction codes can also include instructions that the digital signal processing module 608 can execute. The memory module 606 can include, but is not limited to, Dynamic Random Access Memory (DRAM) or other forms of random memory (Random Access Memory or RAM), and electrically erasable programmable read only memory (Electrically -Erasable Programmable Read Only Memory or EEPROM) or other forms of Read Only Memory or ROM, and removable external memory such as Smart Card or Subscriber Interface Card or SIM body. The memory module 606 can store a particular operating system and a program that implements the method of synchronizing neighbor cells in accordance with the present invention. The human interface 604 can include user input and output modules such as buttons, displays, microphones, and speakers (both not shown in the figures). The RF transceiver module 610 can include or be connected to a RF antenna module (not shown) and is responsible for receiving and transmitting RF signals.

According to an embodiment of the invention, the processing module 602 can include a determining unit to determine whether the mobile communication unit is in a specific communication state suitable for neighboring cell synchronization in a specific wide synchronization pane, wherein the specific wide synchronization pane The range encompasses a plurality of consecutive frames, and a wide search unit for searching or interpreting a particular logical channel of a neighboring cell within the scope of the particular wide sync pane. According to another embodiment of the present invention, the processing module 602 can include a determining unit to determine whether the mobile communication unit is in a specific communication state suitable for performing neighbor cell synchronization in a specific narrow synchronization pane, wherein the specific narrow synchronization window The range of spheres covers the entire range of a particular frame, the first portion of the frame on the particular frame, and the second portion of the next frame of the particular frame, and a narrow search unit for the particular narrow sync pane range Search or interpret specific logical channels of neighboring cells. According to another embodiment of the present invention, the processing module 602 can include a cell selection unit to perform a second illustrated flowchart to select a neighboring cell to be synchronized.

The above embodiments are merely examples of possible implementations. Many variations or modifications can be made without departing from the principles of the disclosure. Such variations or modifications are considered to be within the scope of this disclosure and are protected by the scope of the appended claims.

102-106. . . Steps of a method for synchronizing neighbor cells according to the present invention

200-205. . . Steps for selecting a neighboring cell method according to the present invention

501-508. . . Steps of the neighboring cell synchronization method of the GSM system according to the present invention

600. . . Mobile communication unit

602. . . Processing module

604. . . Human machine interface

606. . . Memory module

608. . . Digital signal processing module

610. . . RF transceiver module

F. . . FCCH/frequency correction channel

S. . . SCH/Sync Channel

I. . . Idle box

PCH. . . Paging channel

BCCH. . . Broadcast control channel

CCCH. . . Shared control channel

N. . . Frame number

The first figure shows a method for a mobile communication unit to synchronize neighboring cells in accordance with an embodiment of the present invention.

The second figure shows a neighbor cell scheduling mechanism in accordance with an embodiment of the present invention.

The third figure shows a schematic diagram of the extent of a sync pane in accordance with an embodiment of the present invention.

The fourth figure shows a typical GSM system multi-frame logical channel configuration diagram.

The fifth diagram shows the neighbor cell synchronization procedure in accordance with an embodiment of the present invention in GSM or its compatible system.

The sixth diagram shows a typical architectural diagram of a mobile communication unit.

501-508. . . Steps of the neighboring cell synchronization method according to the present invention

Claims (54)

A method for a mobile communication unit to synchronize neighboring cells, comprising the steps of: determining, by a first determining unit, whether the mobile communication unit is in a first specific communication suitable for neighboring cell synchronization in a particular wide synchronization pane a state in which the particular wide sync pane range encompasses a plurality of consecutive frames; and a wide search unit for searching or interpreting a particular logical channel of the neighboring cell within the scope of the particular wide sync pane. A method for a mobile communication unit to synchronize neighboring cells, as in claim 1, wherein the first specific communication state is an idle mode. A method for a mobile communication unit to synchronize neighboring cells according to claim 1, wherein the first specific communication state comprises a non-idle state of a separate dedicated control channel (SDCCH or Standalone Dedicated Control Channel). A method for a mobile communication unit to synchronize neighboring cells according to claim 3, wherein the plurality of consecutive blocks is selected from the group consisting of: frame number 0 to frame number 20, frame number 61 to frame number 81 , frame number 74 to frame number 94, frame number 78 to frame number 98, frame number 82 to frame number 101 and frame number 0, frame number 86 to frame number 101, and frame number 0 to frame number 4, frame number 41 to frame No. 61, frame number 45 to frame number 65, frame number 49 to frame number 69, and frame number 53 to frame number 73. The method for synchronizing neighboring cells for a mobile communication unit according to claim 1, further comprising the step of: determining whether the mobile communication unit is in a second specific communication state suitable for performing neighbor cell synchronization in a specific narrow synchronization pane. , the specific narrow sync pane range encompasses a full range of a particular frame, a first partial extent of a particular frame of the particular frame, and a second partial extent of the next frame of the particular frame; and the particular narrow synchronization window Search or interpret specific logical channels of neighboring cells within range. A method for a mobile communication unit to synchronize neighboring cells, as in claim 5, wherein the second specific communication state is a call state. A method for a mobile communication unit to synchronize neighboring cells according to claim 6, wherein the first partial range and the second partial range are between 312 Q bits (quarter time) to 625 Between Q bits. The method for synchronizing neighboring cells for a mobile communication unit according to claim 5, further comprising a scheduling step of selecting a neighboring cell to be synchronized, the scheduling method comprising the steps of: initializing a counter to a first specific value Changing the counter to a unit value when other neighboring cells are selected; checking the counter to determine whether the neighboring cell to be synchronized can be selected, wherein the neighboring cell to be synchronized is only when the counter is equal to the first specific value Can be selected; and when the neighboring cell to be synchronized is selected, the counter is set to a second specific value. A method for a mobile communication unit to synchronize neighboring cells according to claim 8 of the patent application, wherein the step of changing the unit value of the counter is to decrement the counter, and the second specific value is equal to a neighboring cell that the mobile communication unit can synchronize The number is reduced by 1. A mobile communication unit includes a processing module for synchronizing neighboring cells, the processing module comprising: a first determining unit to determine whether the mobile communication unit is in a suitable wide synchronization pane for neighboring cell synchronization A first particular communication state, wherein the particular wide sync pane range encompasses a plurality of consecutive frames; and a wide search unit to search for or interpret a particular logical channel of the neighboring cell within the particular wide sync pane. The mobile communication unit of claim 10, wherein the first specific communication state is an idle mode. The mobile communication unit of claim 10, wherein the first specific communication status comprises a non-idle state of a separate dedicated control channel (SDCCH or Standalone Dedicated Control Channel). The mobile communication unit of claim 12, wherein the plurality of consecutive blocks is selected from the group consisting of: frame number 0 to frame number 20, frame number 61 to frame number 81, frame number 74 to frame number 94, frame number 78 to frame number 98, frame number 82 to frame number 101 and frame number 0, frame number 86 to frame number 101 and frame number 0 to frame number 4, frame number 41 to frame number 61, frame number 45 to Frame number 65, frame number 49 to frame number 69, and frame number 53 to frame number 73. The mobile communication unit of claim 10, wherein the processing module further comprises: a second determining unit to determine whether the mobile communication unit is in a second specific manner suitable for neighboring cell synchronization in a specific narrow synchronization pane. a communication state, wherein the specific narrow sync pane range covers a full range of a specific frame, a first partial range of a frame on the specific frame, and a second partial range of the next frame of the specific frame; and a narrow search unit Searching for or interpreting a particular logical channel of a neighboring cell within the scope of the particular narrow sync pane. The mobile communication unit of claim 14, wherein the second specific communication status is a call state. The mobile communication unit of claim 15 wherein the first partial range and the second partial range are between 312 Q-bits (quarter-bit time) to 625 Q-bits. The mobile communication unit of claim 14, wherein the processing module further comprises a cell selection unit to perform the following steps to select a neighboring cell to be synchronized: initializing a counter to a first specific value; when other neighboring cells are Selecting, changing the counter to a unit value; checking the counter to determine whether the neighboring cell to be synchronized can be selected, wherein the neighboring cell to be synchronized can be selected only when the counter is equal to the first specific value; When the neighboring cell to be synchronized is selected, the counter is set to a second specific value. The mobile communication unit of claim 17, wherein the step of changing the unit value of the counter is to decrement the counter, and the second specific value is equal to the number of neighboring cells that the mobile communication unit can synchronize minus one. A method for a mobile communication unit to synchronize neighboring cells, comprising the steps of: determining, by a first determining unit, whether the mobile communication unit is in a first specific communication suitable for neighboring cell synchronization in a particular narrow synchronization pane a state, wherein the specific narrow sync pane range covers a full range of a particular frame, a first portion of a frame on the particular frame, and a second portion of the next frame of the particular frame; and a narrow search The unit searches for or interprets a particular logical channel of a neighboring cell within the scope of the particular narrow sync pane. A method for a mobile communication unit to synchronize neighboring cells, as in claim 19, wherein the first specific communication state is a call state. A method for a mobile communication unit to synchronize neighboring cells according to claim 20, wherein the first partial range and the second partial range are between 312 Q bits (quarter time) to 625 Between Q bits. The method for simulating a neighboring cell of a mobile communication unit according to claim 19, further comprising a scheduling method for selecting a neighboring cell to be synchronized, the scheduling method comprising the steps of: initializing a counter to a first specific value Changing the counter to a unit value when other neighboring cells are selected; checking the counter to determine whether the neighboring cell to be synchronized can be selected Alternatively, the neighboring cell to be synchronized may be selected only when the counter is equal to the first specific value; and the counter is set to a second specific value when the neighboring cell to be synchronized is selected. A method for a mobile communication unit to synchronize neighboring cells according to claim 22, wherein the step of changing the unit value of the counter is to decrement the counter, and the second specific value is equal to a neighboring cell that the mobile communication unit can synchronize. The number is reduced by 1. The method for simulating a neighboring cell by a mobile communication unit according to claim 22, further comprising the step of: determining whether the mobile communication unit is in a second specific communication state suitable for neighboring cell synchronization in a specific wide synchronization pane. Where the particular wide sync pane range encompasses a plurality of consecutive frames; and a particular logical channel of the neighboring cell is searched or interpreted within the scope of the particular wide sync pane. A method for a mobile communication unit to synchronize neighboring cells according to claim 24, wherein the second specific communication state is an idle mode. A method for a mobile communication unit to synchronize neighboring cells according to claim 24, wherein the second specific communication state comprises a non-idle state of a separate dedicated control channel (SDCCH or Standalone Dedicated Control Channel). A method for a mobile communication unit to synchronize neighboring cells, as in claim 26, wherein the plurality of consecutive blocks are selected from the group consisting of Groups: frame number 0 to frame number 20, frame number 61 to frame number 81, frame number 74 to frame number 94, frame number 78 to frame number 98, frame number 82 to frame number 101, and frame number 0, frame No. 86 to frame number 101 and frame number 0 to frame number 4, frame number 41 to frame number 61, frame number 45 to frame number 65, frame number 49 to frame number 69, and frame number 53 to frame number 73. A mobile communication unit includes a processing module for synchronizing neighboring cells, the processing module comprising: a first determining unit to determine whether the mobile communication unit is in a suitable narrow synchronization pane for neighboring cell synchronization a first specific communication state, wherein the specific narrow synchronization pane range covers a full range of a specific frame, a first partial range of a frame on the specific frame, and a second partial range of the next frame of the specific frame; The narrow search unit searches for or interprets a particular logical channel of the neighboring cell within the scope of the particular narrow sync pane. The mobile communication unit of claim 28, wherein the first specific communication status is a call status. The mobile communication unit of claim 29, wherein the first partial range and the second partial range are between 312 Q bits (a quarter of a bit time) to 625 Q bits. The mobile communication unit of claim 28, wherein the processing module further comprises a cell selection unit to perform the following steps: selecting a neighboring cell to be synchronized: initializing a counter to a first specific value; When the other neighboring cells are selected, the counter is changed by a unit value; the counter is checked to determine whether the neighboring cell to be synchronized can be selected, wherein the neighboring cell to be synchronized can be selected only when the counter is equal to the first specific value Selected; and when the neighboring cell to be synchronized is selected, the counter is set to a second specific value. The mobile communication unit of claim 31, wherein the step of changing the unit value of the counter is to decrement the counter, and the second specific value is equal to the number of neighboring cells that the mobile communication unit can synchronize minus one. The mobile communication unit of claim 31, wherein the processing module further performs an operation comprising: a second determining unit to determine whether the mobile communication unit is suitable for performing a neighboring cell with a specific wide synchronization pane A second specific communication state of synchronization, wherein the particular wide sync pane range encompasses a plurality of consecutive frames; and a wide search unit searches for or interprets a particular logical channel of the neighboring cell within the particular wide sync pane. The mobile communication unit of claim 33, wherein the second specific communication state is an idle mode. The mobile communication unit of claim 33, wherein the second specific communication status comprises a non-idle state of a separate dedicated control channel (SDCCH or Standalone Dedicated Control Channel). The mobile communication unit of claim 35, wherein the plurality of consecutive blocks is selected from the group consisting of: frame number 0 to box No. 20, frame number 61 to frame number 81, frame number 74 to frame number 94, frame number 78 to frame number 98, frame number 82 to frame number 101 and frame number 0, frame number 86 to frame number 101, and frame number 0 To frame number 4, frame number 41 to frame number 61, frame number 45 to frame number 65, frame number 49 to frame number 69, and frame number 53 to frame number 73. A method for a mobile communication unit to synchronize neighboring cells, comprising a scheduling step of selecting a neighboring cell to be synchronized, the scheduling step comprising the steps of: initializing a counter to a first specific value; when other neighboring cells are selected And changing the counter to a unit value; checking the counter to determine whether the neighboring cell to be synchronized can be selected, wherein the neighboring cell to be synchronized can be selected only when the counter is equal to the first specific value; When the neighboring cell to be synchronized is selected, the counter is set to a second specific value; wherein the mobile communication unit uses the appropriate synchronization pane to perform neighbor cell synchronization according to the communication state. A method for a mobile communication unit to synchronize neighboring cells according to claim 37, wherein the step of changing the unit value of the counter is to decrement the counter, and the second specific value is equal to a neighboring cell that the mobile communication unit can synchronize. The number is reduced by 1. The method for synchronizing neighboring cells for a mobile communication unit according to claim 37 of the patent scope further includes the step of: determining whether the mobile communication unit is suitable for a specific wide synchronization The pane performs a first specific communication state of neighboring cell synchronization, wherein the particular wide sync pane range encompasses a plurality of consecutive frames; and searching or interpreting a particular logical channel of the neighboring cell within the specific wide sync pane. A method for a mobile communication unit to synchronize neighboring cells, as in claim 39, wherein the first specific communication state is an idle mode. A method for a mobile communication unit to synchronize neighboring cells according to claim 39, wherein the first specific communication state comprises a non-idle state of a separate dedicated control channel (SDCCH or Standalone Dedicated Control Channel). A method for a mobile communication unit to synchronize neighboring cells according to claim 41, wherein the plurality of consecutive blocks is selected from the group consisting of: frame number 0 to frame number 20, frame number 61 to frame number 81 , frame number 74 to frame number 94, frame number 78 to frame number 98, frame number 82 to frame number 101 and frame number 0, frame number 86 to frame number 101, and frame number 0 to frame number 4, frame number 41 to frame No. 61, frame number 45 to frame number 65, frame number 49 to frame number 69, and frame number 53 to frame number 73. A method for a mobile communication unit to synchronize neighboring cells according to claim 39, further comprising the step of: determining whether the mobile communication unit is in a second specific communication state suitable for neighboring cell synchronization in a specific narrow synchronization pane. , wherein the specific narrow sync pane range covers the entire range of a particular frame, the special The first partial extent of the previous box of the box and the second partial extent of the next box of the particular box; and searching or interpreting the particular logical channel of the neighboring cell within the scope of the particular narrow sync pane. A method for a mobile communication unit to synchronize neighboring cells, as in claim 43, wherein the second specific communication state is a call state. A method for a mobile communication unit to synchronize neighboring cells according to claim 44, wherein the first partial range and the second partial range are between 312 Q bits (quarter time) to 625 Between Q bits. A mobile communication unit, comprising: a processing module for synchronizing neighboring cells, the processing module comprising a cell selecting unit to perform the following steps to select a neighboring cell to be synchronized: initializing a counter to a first specific value; When the neighboring cell is selected, the counter is changed by a unit value; the counter is checked to determine whether the neighboring cell to be synchronized can be selected, wherein the neighboring cell to be synchronized can be selected only when the counter is equal to the first specific value And setting the counter to a second specific value when the neighboring cell to be synchronized is selected; wherein the mobile communication unit uses the appropriate synchronization pane to perform neighbor cell synchronization according to the communication state. The mobile communication unit of claim 46, wherein the step of changing the unit value of the counter is to decrement the counter, and the second specific The value is equal to the number of neighboring cells that the mobile communication unit can synchronize minus one. The mobile communication unit of claim 46, wherein the processing module further comprises: a first determining unit to determine whether the mobile communication unit is in a first specific state suitable for neighboring cell synchronization in a specific wide synchronization pane A communication state, wherein the particular wide sync pane range encompasses a plurality of consecutive frames; and a wide search unit to search for or interpret a particular logical channel of the neighboring cell within the particular wide sync pane. The mobile communication unit of claim 48, wherein the first specific communication state is an idle mode. The mobile communication unit of claim 48, wherein the first specific communication status comprises a non-idle state of a separate dedicated control channel (SDCCH or Standalone Dedicated Control Channel). The mobile communication unit of claim 50, wherein the plurality of consecutive blocks is selected from the group consisting of: frame number 0 to frame number 20, frame number 61 to frame number 81, frame number 74 to frame number 94, frame number 78 to frame number 98, frame number 82 to frame number 101 and frame number 0, frame number 86 to frame number 101 and frame number 0 to frame number 4, frame number 41 to frame number 61, frame number 45 to Frame number 65, frame number 49 to frame number 69, and frame number 53 to frame number 73. The mobile communication unit of claim 48, wherein the processing module further comprises: a second determining unit to determine whether the mobile communication unit is suitable Preferably, the second specific communication state of the neighboring cell synchronization is performed by a specific narrow synchronization pane, wherein the specific narrow synchronization pane range covers a full range of a specific frame, a first partial range of the frame on the specific frame, and the The second portion of the next box of the specific box; and a narrow search unit to search for or interpret the specific logical channel of the neighboring cell within the specific narrow sync pane. The mobile communication unit of claim 52, wherein the second specific communication status is a call state. The mobile communication unit of claim 53, wherein the first partial range and the second partial range are between 312 Q-bits (quarter-bit time) to 625 Q-bits.