TWI292675B - Method of executing handoff of mobile terminal in mobile communications system - Google Patents

Abstract

For a mobile communications system, a method of allowing a mobile station in idle state to perform handoffs in a more efficient manner is provided. This is achieved by receiving, from a source base station via a first channel, channel information of a second channel that is a different type of channel than the first channel, the second channel being used for transmitting overhead messages by at least one neighboring base station; determining a target base station among the one or more neighboring base stations; and receiving the second channel from the target base station by using the channel information.

Description

1292675 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a mobile communication system, and more particularly to a method for enabling a mobile station in an idle state mobile station to perform more efficiently and to assist in handoff. [Prior Art] Fig. 1 illustrates an example of an overall call processing program that starts from a power source of a mobile station of a mobile communication system. When the power is applied to the mobile station, the necessary system information is read from the memory and set in a RAM (or other storage device), and the system is executed by using a navigation channel and a synchronization channel. Synchronize and enter a mobile station start state for receiving the required system information. Included in the message passing through the synchronization channel (eg, a synchronization channel message), system information, associated with a call channel or a P-BCCH (primary broadcast control channel) to allow an idle station to decode the call channel or Frequency information of the P-BCCH, and data rate or coding rate information. If the P-BCCH is used, it additionally includes transmission diversity related information. The idle state of the mobile station means that when the mobile station in the initial state receives all system information and completes the general operation and has received the management from a base station through the call channel or the P-BCCH by using the information transmitted through a synchronous channel message. The status after the message. Some examples of these management messages are a System Parameter Message (SPM) containing system related information, and an Extended System Parameter Message (ESPM) containing information about neighboring bees.

1292675 Nest or section information - General Neighbor List Message (GNLM), a Universal Neighbor List Message (UNLM), and so on. The system access status refers to allowing the mobile station to access a state of the system, and the traffic status refers to when the mobile station is performing communication, i.e., a call is being executed. When a mobile station in the system access state completes a particular operation, it returns to the idle state or traffic state. When in the idle state, if a message transmitted through the call channel or the P-BCCH is not received, the initial procedure is re-executed. For one of the traffic states, if a call ends in execution, the initial procedure is re-executed to re-establish synchronization. The mobile station not only measures the pilot signal strength of a servo base station, but also obtains information about neighboring cells such as PILOT-PN and the like through neighbor messages such as GNLM, ENLM, UNLM, etc., and continuously monitors the guidance of the neighboring cells. Signal strength. Due to this monitoring, if the pilot signal strength of a neighboring cell has exceeded a certain threshold value compared to the pilot signal strength of the servo base station, the mobile station performs a free hand replacement, which means that it has a stronger pilot signal. One of the strength base stations receives a call channel or P-BCCH. Thereafter, the base station that the mobile station is facing when performing the idle replacement hand is referred to as a target base station, and the current base station is referred to as a source base station. In the case where one of the call channels has been received facing a target base station and a P-BCCH has to be received, the problem encountered by the prior art is that the mobile station does not receive decoding of the P-BCCH from the source base station. Any information needed. In detail, as described in Figures 2a and 2b, during the idle state change, the idle state does not directly change to the idle state, but the 6

The 1292675 mobile station faces the target base station, and after receiving a system determination substate, receives the pilot channel and the synchronization channel and receives information about the P-BCCH therefrom, and then enters the idle state. This creates a problem of delay. Moreover, in the case where a call channel has been received from the source base station and a call path is to be received towards the target base station, the data rate is changed due to the hand change when facing the target base station (eg Since 4 8 00 bps becomes 9600 bps), since the related technology mobile station should enter the system decision substate and then enter the idle state, a delay problem may occur. A similar problem occurs when the related technology mobile station has received a P-BCCH from the source base station and needs to receive a call channel after performing a handover to the target base station. Similarly, in the case where a P-BCCH has been received from the source base station and will be received from the target base station, if the data rate or coding rate or Walsh code is changed at the target base station, the related technical mobile station should Entering the system determines the substate and then enters the idle state, thus causing a delay problem. If the delay occurs during the idle state handover, if the related technology platform has received a broadcast service from the source base station in the idle state, these delays will seriously affect the broadcast service quality (Q〇s). In other words, since the related technology mobile station receives a broadcast service through a transfer supplement channel (F-SCH) in an idle state, the idle state entry delay caused by the substate is determined by the system when the idle replacement hand is executed. The broadcast service cannot be received during the elapsed time. 7

1292675 SUMMARY OF THE INVENTION As described above, one aspect of the present invention relates to the inventors' knowledge of the disadvantages of the related art. Based on this understanding, improvements to the idle state handoff procedure can be achieved in accordance with the present invention. The present invention has been used to solve the aforementioned problems of the related art. A desirable result of the present invention is to minimize unnecessary delays that may occur when a one of the mobile communication systems is in an idle state, and thus minimize the degradation in quality of a particular service received from a source base station. The present invention provides a method performed by a base station of a mobile communication system to support the idle state of a mobile station. The present invention provides a method of performing a handoff of an idle state mobile station of a mobile communication system that continuously receives a broadcast or multicast service before or after performing an idle state handoff. More specifically, the present invention determines whether the configuration information of the target base station exists in the configuration information previously received and stored from the neighboring base station, and uses the configuration information stored in the target base station when determining that the configuration information exists. The idle replacement hand is executed, or a system judgment substate is returned when it is determined that the configuration information does not exist. Additional advantages, objects, and features of the invention will be set forth in the description which follows. The objects and advantages of the invention will be apparent from the appended claims. 8 1292675 [Embodiment] The present invention has been described as being implemented in a 3 G P P 2 type mobile communication system. However, since the concepts and descriptions of the present invention can be used in various communication schemes that operate in a similar manner in accordance with the general techniques, the features of the present invention can also be employed and implemented in other types of communication specifications (eg, 3 GPP, 4G, IEEE, OMA, etc.) in the communication system under operation. Furthermore, the present invention will be described in the content of a Broadcast/Multicast Service (BCMCS), but features of the present invention can be used to provide multimedia material such as Multimedia Broadcast/Multicast Service (MBMS), multimedia broadcast, content delivery, etc. Wait for one of the various types of users to serve. Non-limiting exemplary embodiments of the present invention are described below with reference to the accompanying drawings. For a mobile communication system, the present invention provides a method for minimizing unnecessary delays and thus minimizing reception from the target base station when an idle state mobile station performs a handoff between a source base station and a target base station One way to reduce the quality of the service. Figures 3a and 3b illustrate features of certain embodiments of the present invention. In the case where the source base station transmits management information (for example, GNLM, ENLM, UNLM, etc.) through a call channel to the mobile station, the neighboring base station transmits a P-BCCH ( a base station transmitting the management message by the same or similar control technology, in order to support the state change, the channel information of the P-BCCH for the target base station is advanced from the source base station through the management message. receive. After completing the handoff, this channel information is used to receive the p-bcch of the target base station.

1292675 to receive management messages with a minimum delay. Figure 4 illustrates a program flow of an exemplary embodiment of the present invention. A mobile station in the idle state receives, from the source base station, a management message (S 4 1 ) containing channel information of at least one neighboring base station's P-BCCH through a call channel. The source base station may receive the channel information from a base station controller (B S C ) or some other network entity having similar functions. Some examples of such management messages are General Neighborhood List Message (GNLM), an Extended Neighbor List Message (ENLM), a Universal Neighbor List Message (UNLM), BCMC Service Parameter Message (BSPM), and the like. Here you can see that other types of messages with the same or similar functions can also be used. The BSPM message is a message broadcast to a mobile station that needs to receive a broadcast service, and includes a control message for receiving broadcast service data. It should be noted that if the BSPM is not received, the mobile station can enter the system decision substate before entering the idle state to obtain the necessary broadcast/multicast service parameters. The channel information refers to information used to decode the P-BCCH, and may include information about the P-BCCH usage frequency, coding rate, data rate, and transmission diversity of the P-BCCH. The first table shows an example of a data format of the channel information of the P-BCCH included in the management message. This channel information may include all or part of the content described in Table 1. {Table 1} Field Size (bit) BCMC SRI BCCH NON TD INCL 1 BCMC SRI NON TD FREQ INCL 0 or 11

10 1292675 BCMC—SR1 —CDMA_ FREQ NON —TD 0 or 11 BCMC SRI BRAT NON TD 0 or 2 BCMC —SRI—CRAT NON TD 0 or 1 BCMC_SRl_BCCH_CODE_CHAN_NON_ 0 or 6 TD BCMC SRI TD INCL 1 BCMC SRI CDMA FREQ TD 0 or 11 BCMC SRI BRAT TD 0 or 2 BCMC SRI CRAT TD 0 or 1 BCMC SRI BCCH_CODE—CHAN_TD 0 or 6 BCMC SRI TD MODE 0 or 2 BCMC SRI TD POWER MODE 0 or 2 BCMC SR3_INCL 1 BCMC SR3 CENTER FREQ—INCL 0 or 1 BCMC SR3—CENTER—FREQ 0 or 11 BCMC SR3_BRAT 0 or 2 BCMC SR3 BCCH CODE_CHAN 0 or 7 BCMC_SR3_PRIMARY_PILOT 0 or 2 BCMC SR3_PILOT_POWERl 0 or 3 BCMC SR3 PILOT POWER2 0 or 3

Those skilled in the art will appreciate that the specific names or labels of the blocks listed in Table 1 above are merely exemplary. Additional and/or other equivalent or similar names or indicia may also be used to indicate a particular number of cabinets that may be included in the present invention. In the example of Table 1, for SR1 (spreading frequency 1), the information about whether to use transmission diversity, according to whether to use transmission diversity, the frequency, coding rate, and data rate of 11 1292675 in Ρ-BCCH are included in For SR3 (spreading frequency 3), the frequency encoding rate and data rate for p_BccH are included. Each of the barriers in Table 1 will be explained below. BCMC-SRI-BCCH-NON-TD-INCL is an indicator of whether BCCH is included for the non-TD (transport diversity) mode in SR1. BCMC-SR1NON-TD-FREQ-INCL is an indicator to indicate whether the frequency information of SR1 non-transmission diversity is included. BCMC —SRl_CDMA — FREQ_NON_TD is a field assigned to the Siu non-aggregated frequency. BCMC — SR1-BRAT — NON — TD is a BCCH data rate field for the SR1 non-transport diversity mode. BCMC - SRI - CRAT - NON - TD is a BCCH coding rate block for the SR1 non-transport diversity mode. BCMC — SRl — BCCH — CODECHAN — NON — TD is a Walsh code for the SRI BCCH in non-diversity mode. BCMC-SR1-TD-INCL is an indicator block that includes the SR1 transmit diversity frequency. BCMC - SR1 - CDMA_FREQ - TD is used for transmission diversity operation SR1 frequency allocation field. BCMC-SRI-BRAT_TD is the BCCH data rate interception in SR1 transmission diversity mode. BCMC —SR1_CRAT_TD is in the SR1 pass-through mode. The rate, its index, is the one of the transmission information in the equation 12 1292675 B C C Η coding rate block. BCMC — SR1 — BCCH — CODE — CHAN — TD is an SRI BCCH Walsh code in the transmit diversity mode. BCMC-SR1-TD-M0DE is an SR1 transmission diversity mode block. BCMC-SR1-TD-POWER-MODE is a SR1 transmission diversity transmission power level level block. BCMC-SR3 — INCL is a finger-based device that indicates whether SR3 information is included. BCMC-SR3-CENTER_FREQ_INCL is a block indicating the frequency allocation of the central sr3. BCMC — SR3 — CENTER — FREQ is a central SR3 frequency allocation booth. 8〇]\4€一3尺3_611 person is a SR3BCCH data rate block. BCMC — SR3 — BCCH — CODE — CHAN is an SR3 BCCH Walsh coded block. BCMC —SR3_PRIMARY_PIL0T is a first (primary) SR3 guide field. BCMC_SR3_PIL0T_P0WER1 is a first SR3 pilot power level level barrier associated with the lower frequency between the two remaining SR3 frequencies. BCMC_SR3 - PILOT - P0WER2 is a first SR3 pilot power level level block associated with a higher frequency between the two remaining SR3 frequencies.

Table 2 illustrates a model message when the source base station notifies the mobile station of the P-BCCH of the neighboring base station through the BSPM (B CMC Service Parameter Message). In the second table, BCMC_NUM_NGHBR 13 1292675 indicates the number of neighboring base stations that will inform the BC-BCCH related information through the BSPM, and BCMC_NGHBR_PN includes the PN offset information of each neighboring base station. Information about the BCMC_NGHBR_PN and P-BCCH is included by the maximum number of neighboring base stations {BCMC_NUM_NGHBR}.

{Table 2} Block length (bits) [...] BCMC_NUM_NGHBR 6 B CMC _NUM _N GHB R occurrences of the following variable length record { (BCMC_NUM_NGHBR) BCMC_NGHBR_PN 9 BCMC_SR1_BCCH_N0N_TD_INCL 1 BCMC_SR1_N0N_TD__FREQ_INCL 0 or 1 BCMC_SR1_CDMA_FREQ_N0N_TD 0 or 11 BCMC^SR1_BRAT_N0N_TD 0 Or 2 BCMC_SR1_CRAT_N0N_TD 0 or 1 BCMC_SR1_BCCH_C0DE_CHAN_N0N_TD 0 or 6 BCMC_SR1_TD_INCL 1 BCMC_SR1_CDMA_FREQ^TD 0 or 11 BCMC_SR1_BRAT_TD 0 or 2 BCMC_SR1_CRAT__TD 0 or 1 BCMC_SR1_BCCH_C0DE_CHAN_TD 0 or 6 14

1292675 BCMC_SR1_TD_M0DE 〇 or 2 BCMC_SR1_TD_P0WER_LEVEL 〇 or 2 } (BCMC_NUM_NGHBR) It is understood by those skilled in the art that the names or labels of the particular blocks listed in Table 2 above are exemplary only. Additional and/or other equivalent or similar names or indicia may also be used to identify particular fields that may be included in the present invention. All data related to the channel information can be transmitted by a method of transmitting the channel information to the mobile station by the source base station, but other methods can also be considered. That is, the matching of the channel information and the bit information can be performed according to the combination (combination or collection) of the channel information. The number of bits in the information here is determined between the source base station, the mobile station and the adjacent base station. For example, to indicate the configuration of the neighboring base station, the reserved value of the NGHBR-C〇NFIG, which is the same number of times as the neighboring base station is transmitted by the gNLM, is used. Performing a combination (combination or aggregation) of the P-BCCH use frequency, the coding rate, and the data rate (which are included in the channel information) and the 3-bit bit information 'to pass the round with the neighboring base station p_BccH's current channel information matches the bit information, which can reduce the load of the transmission channel information. Furthermore, when the neighboring base station transmits the P_BCCH by using a specific frequency of use, a coding rate, and a data rate previously determined between the source base station and the mobile station, the i-bit can be used, for example, by a simple procedure. Finger pointing, set to '1', etc. to transfer the channel information. 15

1292675 The mobile station receiving the BC-BCCH channel information from the source base station from the source base station retains the received information when it is stored in the memory and can then be used in subsequent handovers. If the received BCMC_SR1_BCCH_NON_TD_INCL has been set to '1', the mobile station stores the values of the BCMC_SR1_NON_TD_FREQ_INCL, BCMC_SR1_BRAT_NON_TD, BCMC_SR1_CRAT_NON_TD, and BCMC_SR1_BCCH_CODE_CHAN_NON_TD received from the base station in the memory, and If the received BCMC_SR1_NON_TD__FREQ_INCL has been set to '1', the BCMC_SR1_CDMA_FREQ_NON_TD received from the base station is stored. If BCMC_SR1_TD_INCL has been set to '1, BCMC_SR1_CDMA_FREQ_TD, BCMC_SR1_BRAT_TD, BCMC_SR1_CRAT_TD, BCMC_SR1_BCCH_CODE_CHAN_TD, BCMC_SR1_TD_MODE, and BCMC_SR1_TD_POWER_MODE received from the base station are stored. Furthermore, if the BCMC_SR3_BRAT_TD received from the base station has been set to '1, then, J stores BCMC_SR3_CENTER_FREQ_INCL, BCMC_SR3_BRAT, BCMC_SR3_BCCH__CODE_CHAN, BCMC_SR3_PRIMARY_PILOT, BCMC_SR3_PILOT_POWER1, and BCMC_SR3_PILOT_POWER2, and if BCMC_SR3_CENTER_FREQ — INCL has been set to c 1, and |J also stores BCMC_SR3_CENTER_FREQ received from the base station. The mobile station continuously monitors the pilot signal strength of neighboring base stations, and 16

1292675 If a pilot signal strength of a neighboring base station exceeds a certain threshold value of the pilot signal strength of the source base station, a corresponding neighboring base station is determined as the target base station and a handoff is performed (S42). When performing a handoff, the mobile station uses the channel information retained when receiving from the source base station to receive the P-BCCH transmitted by the target base station with a minimum delay (S43). Therefore, when the mobile station in the idle station is receiving a different service through an F-SCH (Transfer Supplemental Channel), even if the idle replacement hand for a target base station is performed, since it can directly enter the idle state, no The service provided by the source base station can continue to be received from the target base station without interrupting the service connection by the delay caused by a system determination state before entering the idle state. When the mobile station performs an idle state change hand, the operation procedure of the target base station will be described in more detail below. When the mobile station performs the start of the sequence number associated with the management message to be received from the target base station through the P-BCCH, first initiate management associated with an access channel or an enhanced access channel The sequence number associated with the message, from which the source base station receives the PILOT_PNS of the memory to set the value of the BCMC - NGBHR - PN remaining in the store. After receiving a management message from the P-BCCH of the target base station, if the management information retained in the storage is regarded as the latest, the received information is used to execute the hashed new F-CCCH, and since The F-CCCH receives a call and the like. After receiving a management message, if the management information retained in the store is deemed to be non-latest, the mobile station performs initialization of the sequence number of the related message. The tube can be determined by comparing the sequential number of the corresponding message with a stored sequential number.

1292675 Is the information up to date? After the above procedure, the mobile station compares to determine whether the NGBHR_FSCH_FREQ (ie, the corresponding frequency information for receiving one of the FSCH channels of a broadcast monthly service) received by the BSPM of the source base station is related to the target base station. The CDMACHS matches. If they do not match, the CDMACHS is set to NGHBR - FSCH - FREQ and the broadcast from the FSCH is monitored when performing adjustments to a new CDMA channel. So far, it has been explained that the mobile station has received a call channel from the source base station and has received a P-BCCH towards the target base station. In another embodiment, the mobile station receives a P-BCCH from the target base station during the process of receiving a P-BCCH from the source base station, and receives a P-BCCH if the data rate and the coding rate are received. And/or Walsh coding changes, the features of the present invention can be applied. The foregoing case is explained in more detail: when a related technology mobile station performs a handover and has approached a target base station, a delay occurs because the idle state is entered by first entering a system determination state. According to the present invention, the mobile station receives the P-BCCH channel information (frequency, data rate, coding rate, Walsh code, etc.) of the target base station from the source base station in advance through the P-BCCH management message, thereby changing hands. The channel information is used after completion to receive the P-BCCH of the target base station to allow for minimal or no delayed management message reception. In another embodiment of the present invention, if a call channel has been received from the source base station and a call channel is received again toward the target base station, the data rate is changed even when facing the target base station ( Example 18

1292675 If the change from 48 0 bps to 9600 bps), the features of the invention can still be applied. In this case, the mobile station receives the call channel information of the neighboring base station from the source base in advance through the management message (eg GNLM, ENLM UMLM). , BSPM, etc.), thus using the channel to receive the P-BCCH of the target base station after the handover is completed, allowing the reception of the message without delay. In a further embodiment of the present invention, if a P-BCCH is received from the source base station but a call channel is received after the target base station, the preset data rate of the call channel is transmitted by the target base station (eg, 9600 bps) may be applied to the target base station due to the change of hands, and the features of the present invention can still be applied. In this case, the source base transmits the call channel information (especially, a current data rate) of the target base station to the mobile station through management messages to avoid or minimize unnecessary delays in the handover sequence. In order to implement the various features described above, various types of hardware and/or software components (modules) can be used with the present invention. For example, various hardware groups can include the various circuits and components required to perform the steps of the foregoing methods. Different software modules (by processors and/or other hardware) may contain the various codes and protocols required to perform the steps of the method of the present invention. The present invention provides a method for supporting a hand when a mobile station is in an idle mode, the method comprising: receiving and storing a configuration signal of a neighboring base station; and simultaneously checking the strength of one of the guiding channels of the adjacent base station, detecting the The pilot number strength of a target base station of the pilot signal strength of a source base station; checking whether the configuration information of the target base station exists in the neighboring station communication, and not changing the capital model Nearly 19

1292675 The storage configuration information of the base station; and according to the check, it is determined how to perform the free replacement hand. The determining step includes: returning to a system determining substate if the configuration information does not exist. The determining step includes: if the configuration information exists, using the storage configuration information of the target base station to perform a free replacement hand. The configuration information is received through management messages. The management message contains a broadcast/multicast service parameter message (B SPM) and a neighbor list message. The neighbor list message includes at least one of a general neighbor list message (GNLM), an extended neighbor list message (ENLM), and a universal neighbor list message (UNLM). The management message includes a field indicating the information of the physical channel used by the mobile station to transmit one of the management messages in the idle state. Information about this physical channel indicates whether transmission diversity is supported. If transmission diversity is supported, appropriate values including parameters for frequency allocation, data rate, marshalling rate, W a 1 s h encoding, transmission diversity mode, and power level can be used. If the mobile station has monitored a PCH before performing the idle handoff and selects a neighboring base station for supporting the P-BCCH idle hand, and the mobile station has received the P-BCCH parameter of the neighboring base station from the BSPM , the mobile station performs a normal handoff procedure. The source base station transmits the management message through a first control channel for managing the message, and the target base station transmits the management message through a second control channel for managing the message. The first and second control channels are broadcast control channels. The first control channel is a PCH and the second control channel is a P-BCCH. 20

1292675 The information includes at least one of a pilot PN sequence offset and an appropriate value for frequency allocation, data rate, coding rate, and Walsh coding. The information is provided in an amount that matches the total number of neighboring base stations. Furthermore, the present invention provides a method for supporting a hand change when a mobile station is in an idle mode, the method comprising: detecting a pilot signal greater than a source base station when checking a pilot channel strength of a plurality of adjacent base stations One of the target base stations of the strength guides the signal strength; determines whether the configuration information of the target base station exists in the configuration information previously received and stored from the neighboring base station; and uses the target base station if the configuration information exists The configuration information is stored to perform a handoff, or if the configuration information does not exist, a system determination substate is returned. The configuration information is received through a configuration information management message containing a one-to-many service parameter and a list of neighboring base stations. The management message includes parameters for transmitting a physical channel of the management message indicating whether transmission diversity is supported. If transmission diversity is supported, the management message includes frequency allocation, data rate, coding rate, W a 1 s h coding, transmission diversity mode, and power level values. If transmission diversity is not supported, the management message includes the frequency allocation, data rate, coding rate, and Walsh coded values. The parameters of each of the neighboring base stations are separately provided, and thus the total number of parameters corresponds to the total number of the neighboring base stations. As described above, those skilled in the art to which the present invention pertains will appreciate that various alternatives, modifications, and alterations may be included in the technical scope of the present invention and are not limited to the exemplary embodiments and additional figures described herein. twenty one

1292675 shows. For some of the desired results and effects of the present invention, according to a handoff execution method for a mobile station in an idle state in a mobile communication system, when an idle state mobile station transmits and manages through different channel types respectively One of the messages can avoid unnecessary delays when performing a handoff between the base station and a target base station, thereby maintaining the quality of the service received from the source base station without degrading the service quality when performing the handoff. In particular, this is due to the reception of broadcast or multicast services and will not be caused by a disconnection before or after a handicap in an idle state. This description describes various illustrative embodiments of the invention. It is intended that the scope of the invention be construed as covering the various modifications and Therefore, the following claims are intended to cover the modifications, equivalent structures and features in accordance with the spirit and scope of the invention disclosed herein. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an overall call processing procedure starting from the activation of one of the mobile communication systems; FIGS. 2a and 2b illustrate an idle replacement hand execution procedure according to one of the related technologies; 3a and 3b illustrate a free hand replacement procedure in accordance with the present invention; and Fig. 4 illustrates a program flow of an exemplary embodiment of the present invention. 22 1292675

[Simplified description of the component representative symbol] S4 1 receives a management message containing information of the P-BCCH channel of the neighboring base station through a call channel from a source base station. S42 determines the target base station.

S43 uses the channel information from the target base station to receive P-BCCH 23

Claims (1)

1292675 X. Patent application scope: 1. A method for supporting a handoff in a idle mode, the method at least comprising: a receiving step for receiving and storing a neighboring base station (base stati ο Ns) configuration information; an inspection and detection step for checking a strength of a pilot channel of the neighboring base station, the debt measurement being greater than one of the pilot signal strengths of a source base station a signal strength of one of the target base stations; a step of checking configuration information, which is used to check whether configuration information of the target base station exists in the storage configuration information of the neighboring base station; and a determining step, which is used according to the Check to determine how to perform a free replacement hand. 2. The method of claim 1, wherein the determining step comprises: a returning step of returning to a system determining substate if the configuration information does not exist. 3. The method of claim 1, wherein the determining step comprises: performing an step of using 24 if the configuration information exists 1292675 The target base station stores configuration information to perform idle replacement. 4. The method of claim 2, wherein the configuration information is received via an overhead message. 5. The method of claim 4, wherein the management message includes a broadcast/multicast service parameter message (B SPM ) and a neighbor list message. 6. The method of claim 5, wherein the neighbor list message comprises at least a neighbor list information (GNLM), an extended neighbor list message (ENLM), and a general neighbor list message (UNLM). One of them. 7. The method of claim 4, wherein the management message comprises a field indicating that the mobile station of the idle state transmits information of an entity channel of the management message. 8. The method of claim 7, wherein the information of the physical channel indicates whether a transmission diversity is supported. 9. The method of claim 8, wherein if the transmission diversity is supported, an appropriate value including parameters such as frequency allocation, data rate, coding rate, Walsh 25 1292675 coding, transmission diversity mode, and power level is used. The method of claim 8, wherein if the transmission diversity is not supported, an appropriate value including parameters such as frequency allocation, data rate, coding rate, and Walsh coding is used. 1 1. The method of claim 1, wherein the mobile station has monitored a PCH before performing the idle replacement, and has selected to support one of the P-BCCH neighboring base stations for free replacement and the action The station has received the parameters of the P-BCCH of the neighboring base station from the BSPM, and the mobile station performs a normal handover procedure. 1 2. The method of claim 4, wherein the source base station transmits a management message through a first control channel for managing the message, and the target base station transmits a second control through one of the management messages. Channel transmission The method of claim 12, wherein the first and second control channels are broadcast control channels 0 1 4. The method of claim 13 The first control channel is a PCH and the second control channel is a P-BCCH. 26 The method of claim 7, wherein the information comprises at least one of a pilot PN sequence offset and an appropriate value of a frequency allocation, a data rate, a coding rate, and a Walsh code. 1 6. The method of claim 15, wherein the amount of information provided is consistent with the total number of neighboring base stations. 1 7 · A method for supporting a change of hands in an idle mode, the method at least comprising: a detecting step, which is used to detect greater than one when checking the strength of a guiding channel of a plurality of adjacent base stations One of the source base stations, one of the target base stations of the pilot signal strength, and a determining step, which is used to determine whether the configuration information of the target base station exists in the storage configuration information previously received from the neighboring base station. And an execution/return step for performing a handoff using the storage configuration information of the target base station if the configuration information exists, or returning to a system determination substate if the configuration information does not exist. The method of claim 17, wherein the configuration information is received via a management message comprising a one-to-many service parameter and a list of neighboring base stations. 27 The method of claim 18, wherein the management message includes a parameter used to transmit a physical channel of the management message, the parameter indicating whether transmission diversity is supported. The method of claim 19, wherein if the transmission diversity is supported, the management message includes frequency allocation, data rate, coding rate, Walsh coding, transmission diversity mode, and power level values. The method of claim 19, wherein if the transmission diversity is not supported, the management message includes a frequency allocation, a data rate, a coding rate, and a Walsh coded value. 22. The method of claim 17, wherein the parameters of each of the adjacent base stations are individually provided, and thus the total number of parameters is consistent with the total number of adjacent base stations. 28