CN101409899B - Switching method, system and terminal for aerial honeycomb wireless communication - Google Patents
Switching method, system and terminal for aerial honeycomb wireless communication Download PDFInfo
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- CN101409899B CN101409899B CN200810169493A CN200810169493A CN101409899B CN 101409899 B CN101409899 B CN 101409899B CN 200810169493 A CN200810169493 A CN 200810169493A CN 200810169493 A CN200810169493 A CN 200810169493A CN 101409899 B CN101409899 B CN 101409899B
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Abstract
The invention discloses a method for switching air cellular wireless communication and a system and a terminal thereof. The method comprises the steps as follows: the bit of PilotPNPhase field in a route update message with C.SOO24B standard, namely RouteUpdate message is increased to a preset bit; the terminal confirms the PilotPNPhase field in the RouteUpdate message according to received multipath component which arrives earliest corresponding to the time reference of a reference pilot, a PN phase of a non-reference pilot plot and the preset bit; and the terminal carries the confirmed PilotPNPhase field in the RouteUpdate message and sends the RouteUpdate message. The technical proposal ensures that the terminal can switch the air cellular wireless communication fast and effectively.
Description
Technical field
The present invention relates to the communications field, and especially, relate to a kind of changing method, system and terminal of aerial cellular radio communication.
Background technology
At present; At High Rate Packet Data B version (Evolution-Data OptimizedRevision B; Abbreviate EVDO REV B as) in the definition of RouteUpdate message in the C.S0024B air-interface standard agreement of system; Do not consider the use scene of wireless telecommunications aloft (for example, on aircraft, realizing the business of getting online without being tethered to a cable).
As shown in Figure 1; It is the scope that BTSA covers that scope shown in the great circle is base transceiver station A (Base Transceiver Station abbreviates BTS as) in the aerial cellular radio communication, and BTSB is a wireless communication base station in the target empty that switches to of terminal; Its coverage is greater than BTSA; The difference of BTSB covering radius and BTSA covering radius is PilotArrival, because the difference that the difference of the covering radius of aerial two BTS size can be big or small than the covering radius of two BTS in the terrestrial cellular wireless telecommunications is much bigger, therefore; Aloft in the wireless telecommunications handoff procedure; When the distance of terminal and target BTS and with during greater than 512chip, just can't the obtaining the effective support of the RouteUpdate message of existing protocol, thereby can't accomplish the switching of aerial cellular radio mobile communcations system of source BTS apart from difference.
In the C.S0024B standard agreement; The regular transmission RouteUpdate message of terminal meeting; With current position, the wireless signal strength of current service cell and the relevant information of the non-reference pilot district pilots signal that this terminal searching arrives in notice this terminal of Access Network (Access Network abbreviates AN as), wherein; The relevant information of this non-reference pilot sub-district comprises the intensity PilotStrength of the non-reference pilot district pilots signal that terminal searching arrives and the composite field PilotPNPhase of 15 bits; This PilotPNPhase is made up of the PN phase place and the PilotArrival of non-reference pilot district pilots, wherein, and the multipath component that arrives the earliest that PilotArrival representes that this terminal receives with respect to the time reference of reference pilot; And PilotArrival is unit with chip.
In practical application; In code division multiple access (Code Division Multiple Access abbreviates CDMA as) cellular radio communication, the unit of PNIncrease (PNIncrease representes the increment of PN) is chip; Because the multiplexing restriction of PN; Thereby the maximum 16chip (have only 512/16=32 PN phase place to use this moment) that uses, when calculating PilotArrival, the maximum PilotArrival of permission is 16 * 64/2=512chip.Therefore, when the range difference of terminal distance reference pilot tone and non-reference pilot during greater than 244 * 512=124928 rice, AN can't correct calculation PilotArrival; Yet; In the application of the on-air radio communication of reality, its radius of society maximum can reach 1800chip or 439200 meters, therefore; The PilotPNPhase of 15 present bits can't support the range difference of maximum 1800chip, will cause the terminal can't accomplish switching.At present, because the problem that on-air radio honeycomb mobile communcations system switches can't be accomplished in the excessive terminal that causes of distance, effective solution is not proposed as yet to this.
Summary of the invention
Consider that the terminal is aloft in the handoff procedure of cellular radio communication; When the distance of terminal and target BTS with the difference of the distance of source BTS during greater than 512chip (transmission range that 1chip equals 244 meters); Can't obtain effective support of the RouteUpdate message of existing protocol; Make the terminal can't accomplish the problem that on-air radio honeycomb mobile communcations system switches and propose the present invention; For this reason, main purpose of the present invention is to provide a kind of changing method, system and terminal of aerial cellular radio communication, to solve the problems referred to above that exist in the correlation technique.
According to an aspect of the present invention, a kind of changing method of aerial cellular radio communication is provided, being used for the terminal is that EVDO REV B system carries out the switching of aerial cellular radio communication at High Rate Packet Data B edition system.
Changing method according to aerial cellular radio communication of the present invention comprises: with the routing update message of C.S0024B standard is that the bit number of the PilotPNPhase field in the RouteUpdate message is increased to predetermined bit; The terminal is confirmed the PilotPNPhase field in the RouteUpdate message according to what receive with respect to the multipath component that arrives the earliest of the time reference of reference pilot, the PN phase place and the predetermined bit of non-reference pilot district pilots; The terminal is carried definite PilotPNPhase field and is sent RouteUpdate message in RouteUpdate message.
Wherein, above-mentioned predetermined bit is 23 bits.
Wherein, specifically being treated to of PilotPNPhase field in the RouteUpdate message confirmed at above-mentioned terminal: the PilotPNPhase field in the RouteUpdate message: PilotPNPhase=(PilotArrival+ (16384 * PilotPN)) mod2 is confirmed according to formula (1) in the terminal
23Formula (1), wherein, the multipath component that arrives the earliest that PilotArrival representes that the terminal receives with respect to the time reference of reference pilot, PilotPN representes the PN phase place of non-reference pilot district pilots.
In addition, above-mentioned terminal is after Access Network sends RouteUpdate message, and said method further comprises: Access Network is confirmed PilotArrival and PilotPN according to the inverse operation of formula (1).
According to a further aspect in the invention, a kind of terminal is provided, being used for the terminal is that EVDO REV B system carries out the switching of aerial cellular radio communication at High Rate Packet Data B edition system.
Terminal according to the present invention comprises: determination module is used for confirming that according to the multipath component, the PN phase place of non-reference pilot district pilots and the predetermined bit of PilotPNPhase field that arrive the earliest with respect to the time reference of reference pilot that the terminal receives routing update message is the PilotPNPhase field of RouteUpdate message; Sending module is used for sending RouteUpdate message to Access Network.
Wherein, the predetermined bit of above-mentioned PilotPNPhase field is 23 bits.
In addition, above-mentioned determination module is further used for confirming the PilotPNPhase field in the RouteUpdate message: PilotPNPhase=(PilotArrival+ (16384 * PilotPN)) mod2 according to formula (1)
23Formula (1), wherein, the multipath component that arrives the earliest that PilotArrival representes that the terminal receives with respect to the time reference of reference pilot, PilotPN representes the PN phase place of non-reference pilot district pilots.
In accordance with a further aspect of the present invention, a kind of switched system of aerial cellular radio communication is provided, has been used for the terminal and carries out the switching of aerial cellular radio communication in EVDO REV B system.
Switched system according to aerial cellular radio communication of the present invention comprises: terminal and Access Network; Wherein, Above-mentioned terminal comprises: determination module is used for confirming that according to the multipath component, the PN phase place of non-reference pilot district pilots and the predetermined bit of PilotPNPhase field that arrive the earliest with respect to the time reference of reference pilot that the terminal receives routing update message is the PilotPNPhase field of RouteUpdate message; Sending module is used for sending RouteUpdate message to Access Network; Access Network is used for the RouteUpdate message that receiving terminal sends, and according to definite routing update message, promptly contrary processing of the PilotPNPhase field in the RouteUpdate message confirmed PilotArrival and PilotPN.
Wherein, the predetermined bit of above-mentioned PilotPNPhase field is 23 bits.
In addition, above-mentioned determination module is further used for confirming the PilotPNPhase field in the RouteUpdate message: PilotPNPhase=(PilotArrival+ (16384 * PilotPN)) mod2 according to formula (1)
23Formula (1), wherein, the multipath component that arrives the earliest that PilotArrival representes that the terminal receives with respect to the time reference of reference pilot, PilotPN representes the PN phase place of non-reference pilot district pilots.
By means of technical scheme of the present invention; Through the routing update message to the C.S0024B standard is that PilotPNPhase field in the RouteUpdate message defines again; Solved the terminal aloft in the handoff procedure of cellular radio communication; When the distance of terminal and target BTS with the difference of the distance of source BTS during greater than 512chip; Can't obtain effective support of the RouteUpdate message of existing protocol, cause the terminal can't accomplish the problem that on-air radio honeycomb mobile communcations system switches, make the terminal can carry out the switching of aerial cellular radio communication fast and effectively.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the sketch map of aerial wireless telecommunications handoff scenario in the correlation technique;
Fig. 2 is the flow chart according to the changing method of the aerial cellular radio communication of the embodiment of the invention;
Fig. 3 is the signaling process figure according to the detailed process of the changing method of the aerial cellular radio communication of the embodiment of the invention;
Fig. 4 is the block diagram according to the terminal of the embodiment of the invention;
Fig. 5 is the block diagram according to the switched system of the aerial cellular radio communication of the embodiment of the invention.
Embodiment
Functional overview
In correlation technique; Because the covering radius of the BTS of cellular radio communication system is more much bigger than the covering radius of BTS in the terrestrial cellular wireless telecommunications in the C.S0024B standard hollow, so the terminal is aloft in the handoff procedure of cellular radio communication, when the distance of terminal and target BTS with the difference of the distance of source BTS during greater than 512chip (transmission range that 1chip equals 244 meters); Can't obtain effective support of the Route Update message of existing protocol; That is, can't accomplish the problem that on-air radio honeycomb mobile communcations system switches, therefore; The present invention is on the basis of existing C .S0024B standard agreement; Through the PilotPNPhase field in the RouteUpdate message in the standard agreement is defined again, the PilotPNPhase field is increased by 1 BYTE, promptly; Bring up to 23 bits by 15 bits, can't support the problem that aerial cellular radio communication switches thereby solved EVDO B system.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Method embodiment
According to embodiments of the invention, a kind of changing method of aerial cellular radio communication is provided, being used for the terminal is that EVDO REV B system carries out the switching of aerial cellular radio communication at High Rate Packet Data B edition system.Fig. 2 is the flow chart according to the changing method of the aerial cellular radio communication of the embodiment of the invention, and is as shown in Figure 2, comprises following processing (step S202-step S204):
Step S202 is that the bit number of the PilotPNPhase field in the RouteUpdate message is increased to predetermined bit with the routing update message of C.S0024B standard, and preferably, above-mentioned predetermined bit is 23 bits.
Particularly, in correlation technique, the RouteUpdate message format in the C.S0024B standard agreement is shown in table one:
Table one
| Field (field) | Length (bits) length/bit |
| MessageID (message id) | 8 |
| MessageSequence (message sequence) | 8 |
| ReferencePilotPN (with reference to leading PN) | 9 |
| ReferencePilotStrength (with reference to preamble length) | 6 |
| ReferenceKeep | 1 |
| NumPilots | 4 |
NumPilots occurrences of the following fields (NumPilot has following field):
{
| PilotPNPhase (leading PN phase place) | 15 |
| ChannelIncluded (channel that comprises) | 1 |
| Channel (channel) | 0 or 24 |
| PilotStrength (preamble length) | 6 |
| Keep | 1 |
}
| ATTotalPilotTransmissionIncluded (the total preamble transmission of the AT that comprises) | 1 |
| ATTotalPilotTransmission (the total preamble transmission of AT) | 0 or 8 |
| ReferencePilotChannelIncluded (the reference that comprises | 1 |
| Leading channel) | |
| ReferencePilotChannel (with reference to leading channel) | 0 or 24 |
| Reserved (reservation) | Variable (variable) |
Shown in the RouteUpdate message format table two in the C.S0024B standard agreement that defines again of the embodiment of the invention:
Table two
| Field (field) | Length (bits) length/bit |
| MessageID (message id) | 8 |
| MessageSequence (message sequence) | 8 |
| ReferencePilotPN (with reference to leading PN) | 9 |
| ReferencePilotStrength (with reference to preamble length) | 6 |
| ReferenceKeep | 1 |
| NumPi lots | 4 |
NumPilots occurrences of the following fields：
{
| PilotPNPhase (leading PN phase place) | 23 |
| ChannelIncluded (channel that comprises) | 1 |
| Channel (channel) | 0 or 24 |
| PilotStrength (preamble length) | 6 |
| Keep | 1 |
}
| ATTotalPilotTransmissionIncluded (the total preamble transmission of the AT that comprises) | 1 |
| ATTotalPilotTransmission (the total preamble transmission of AT) | 0 or 8 |
| ReferencePilotChannelIncluded (the reference that comprises | 1 |
| Leading channel) | |
| ReferencePilotChannel (with reference to leading channel) | 0 or 24 |
| Reserved (reservation) | Variable (variable) |
Can find out that from table one and table two the PilotPNPhase field increases by 1 BYTE, that is, its size can be increased to 23 bits by 15 bits.
Step S204; Send under the situation of RouteUpdate message to Access Network at the terminal, the PilotPNPhase field in the RouteUpdate message is confirmed according to the multipath component that arrives the earliest with respect to the time reference of reference pilot that receives, the PN phase place and the predetermined bit of non-reference pilot district pilots in the terminal.At last, the terminal is carried definite PilotPNPhase field and is sent RouteUpdate message in RouteUpdate message.
Need to prove that in correlation technique, the PilotPNPhase computational methods of CS0024B agreement are:
PilotPNPhase＝(PilotArrival+(64×PilotPN))mod2
15
Wherein, the multipath component that arrives the earliest that PilotArrival representes that the terminal receives with respect to the time reference of reference pilot, PilotPN representes the PN phase place of non-reference pilot district pilots.
Yet in step S204, specifically being treated to of PilotPNPhase field in the RouteUpdate message confirmed at the terminal: the PilotPNPhase field in the RouteUpdate message is confirmed according to following formula in the terminal:
PilotPNPhase＝(PilotArrival+(16384×PilotPN))mod2
23
Wherein, the multipath component that arrives the earliest that PilotArrival representes that the terminal receives with respect to the time reference of reference pilot, PilotPN representes the PN phase place of non-reference pilot district pilots.
After step S204, the terminal is after Access Network sends RouteUpdate message, and Access Network also need be according to PilotPNPhase=(PilotArrival+ (16384 * PilotPN)) mod2
23Inverse operation confirm PilotArrival and PilotPN.
Below, in conjunction with instance, be example with EVDO REVB system based on the CDMA standard, technique scheme of the present invention is carried out detailed explanation.Fig. 3 is the signaling process figure according to the detailed process of the changing method of the aerial cellular radio communication of the embodiment of the invention, and is as shown in Figure 3, comprises following processing:
Step S301, access terminal transmission ConnectionRequest and RouteUpdate message is BTSA to the source, and is forwarded to base station controller (Base StationController) by BTSA.
Step S302, source BTSA send ACAck message to the terminal.
Step S303, BSC sends OpenTrafficChannel and orders source BTSA, and notification source BTSA accomplishes the processing that Traffic Channel is opened.
Step S304, source BTSA send OpenTrafficChannelAck message to BSC, notify the completion of opening of BSC Traffic Channel.
Step S305, BSC sends TrafficChannelAssignment message, and is dealt into the terminal via source BTSA.
Step S306 accesses terminal and sends the Pilot+DRC channel.
Step S307, BSC sends RTCAck message, and sends to the terminal via source BTSA.
Step S308 accesses terminal and sends TrafficChannelComplete message, and is forwarded to BSC via source BTSA.
Step S309; When other pilot tones outside finding reference pilot of accessing terminal satisfy switching condition; On Traffic Channel, send RouteUpdate message to source BTSA; Source BTSA transmits this RouteUpdate to B SC, simultaneously, accesses terminal according to PilotPNPhase=(PilotArrival+ (16384 * PilotPN)) mod2
23Calculate the PilotPNPhase field, and the RouteUpdate message of sending.
Step S310, BSC is according to PilotPNPhase=(PilotArrival+ (16384 * PilotPN)) mod2
23Algorithm for inversion calculate PilotPN, PilotArrival, and send OpenTrafficChannel and order target BTS B, notification target BTSB accomplish that Traffic Channel opens processing.
Step S311, target BTS B send OpenTrafficChannelAck message to BSC, notify the completion of opening of BSC Traffic Channel.
Step S312, BSC sends TrafficChannelAssignment message, and is forwarded to the terminal via source BTSA.
Step S313 accesses terminal and sends TrafficChannelComplete message, and this message sends to BSC via source BTSA, switches to accomplish.
Through above-mentioned processing; Solved the terminal aloft in the handoff procedure of cellular radio communication; When the difference of terminal distance objective BTS and distance sources BTS during greater than 512CHIP (transmission range that 1CHIP equals 244 meters); The RouteUpdate message of existing protocol can't effectively be supported, makes the terminal can't accomplish the problem that on-air radio honeycomb mobile communcations system switches.
Device embodiment
According to embodiments of the invention, a kind of terminal is provided, being used at High Rate Packet Data B edition system is that EVDO REV B system carries out the switching of aerial cellular radio communication.Fig. 4 is the block diagram according to the terminal of the embodiment of the invention, and is as shown in Figure 4, comprises determination module 40, sending module 42.Below, the explanation that above-mentioned terminal is believed.
In the terminal according to present embodiment, determination module 40 is used for confirming that according to the multipath component, the PN phase place of non-reference pilot district pilots and the predetermined bit of PilotPNPhase field that arrive the earliest with respect to the time reference of reference pilot that the terminal receives routing update message is the PilotPNPhase field of RouteUpdate message.
In the application of reality; Before determination module 40 is handled; The bit number that need be the PilotPNPhase field in the RouteUpdate message with the routing update message of C.S0024B standard is increased to predetermined bit, preferably, can the PilotPNPhase field be increased by 1 BYTE; That is, its bit number is increased to 23 bits by 15 bits.
In addition, need to prove that determination module 40 can be confirmed the PilotPNPhase field in the RouteUpdate message according to following formula:
PilotPNPhase＝(PilotArrival+(16384×PilotPN))mod2
23
Wherein, the multipath component that arrives the earliest that PilotArrival representes that the terminal receives with respect to the time reference of reference pilot, PilotPN representes the PN phase place of non-reference pilot district pilots.
In addition, in the terminal according to present embodiment, sending module 42 is connected to determination module 40, is used for after determination module 40 has been confirmed the PilotPNPhase field of RouteUpdate message, sends RouteUpdate message to Access Network, switches thereby accomplish.
The terminal is through above-mentioned processing; Just can avoid in the handoff procedure of cellular radio communication aloft; When the difference of distance objective BTS and distance sources BTS during greater than 512CHIP (transmission range that 1CHIP equals 244 meters); The RouteUpdate message of existing protocol can't effectively be supported, makes the terminal can't accomplish the problem that on-air radio honeycomb mobile communcations system switches.
System embodiment
According to embodiments of the invention, a kind of switched system of aerial cellular radio communication is provided, be used for the terminal and carry out the switching of aerial cellular radio communication in EVDO REV B system.Fig. 5 is the block diagram according to the switched system of the aerial cellular radio communication of the embodiment of the invention, and is as shown in Figure 5, and said system comprises terminal 50 and Access Network 52, and wherein, terminal 50 comprises determination module 502, sending module 504.Carry out detailed explanation in the face of said system down.
Above-mentioned terminal 50 comprises:
Determination module 502 is used for confirming that according to the multipath component, the PN phase place of non-reference pilot district pilots and the predetermined bit of PilotPNPhase field that arrive the earliest with respect to the time reference of reference pilot that terminal 50 receives routing update message is the PilotPNPhase field of RouteUpdate message.
In the application of reality; Before determination module 502 is handled; The bit number that need be the PilotPNPhase field in the RouteUpdate message with the routing update message of C.S0024B standard is increased to predetermined bit, preferably, can the PilotPNPhase field be increased by 1 BYTE; That is, bring up to 23 bits by 15 bits.
In addition, need to prove that determination module 502 is confirmed the PilotPNPhase field in the RouteUpdate message according to following formula:
PilotPNPhase＝(PilotArrival+(16384×PilotPN))mod2
23
Wherein, the multipath component that arrives the earliest that PilotArrival representes that the terminal receives with respect to the time reference of reference pilot, PilotPN representes the PN phase place of non-reference pilot district pilots.Sending module 504 is connected to determination module 502, is used for sending RouteUpdate message to Access Network 52.
Access Network 52 is used for the RouteUpdate message that receiving terminal sends, and according to confirming that routing update message is the contrary definite PilotArrival and the PilotPN of handling of the PilotPNPhase field in the RouteUpdate message.
In sum; By means of technical scheme of the present invention; Through the routing update message to the C.S0024B standard is that PilotPNPhase field in the RouteUpdate message defines again; Solved the terminal aloft in the handoff procedure of cellular radio communication, when the difference of the distance of terminal distance objective BTS and distance sources BTS during greater than 512CHIP (transmission range that 1CHIP equals 244 meters), the RouteUpdate message of existing protocol can't effectively be supported; Make the terminal can't accomplish the problem that on-air radio honeycomb mobile communcations system switches, make the terminal can carry out the switching of aerial cellular radio communication fast and effectively.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. the changing method of an aerial cellular radio communication, being used for the terminal is that EVDO REV B system carries out the switching of aerial cellular radio communication at High Rate Packet Data B edition system, it is characterized in that said method comprises:
The routing update message of C.S0024B standard is that the bit number of the PilotPNPhase field in the RouteUpdate message is set to predetermined bit, and said predetermined bit is 23 bits;
The PilotPNPhase field in the said RouteUpdate message is confirmed according to the multipath component that arrives the earliest with respect to the time reference of reference pilot that receives, the PN phase place and the said predetermined bit of non-reference pilot district pilots in said terminal;
Said terminal is carried definite said PilotPNPhase field and is sent said RouteUpdate message in said RouteUpdate message.
2. method according to claim 1 is characterized in that, specifically being treated to of PilotPNPhase field in the said RouteUpdate message confirmed at said terminal:
The PilotPNPhase field in the said RouteUpdate message is confirmed according to formula (1) in said terminal:
PilotPNPhase=(PilotArrival+ (16384 * PilotPN)) mod2
23Formula (1), wherein, the multipath component that arrives the earliest that said PilotArrival representes that said terminal receives with respect to the time reference of reference pilot, said PilotPN representes the PN phase place of non-reference pilot district pilots.
3. method according to claim 1 is characterized in that, said terminal is after Access Network sends said RouteUpdate message, and said method further comprises:
Said Access Network is confirmed said PilotArrival and said PilotPN according to the inverse operation of said formula (1).
4. terminal, being used at High Rate Packet Data B edition system is that EVDO REV B system carries out the switching of aerial cellular radio communication, it is characterized in that said terminal comprises:
Determination module; Be used for confirming that according to the multipath component, the PN phase place of non-reference pilot district pilots and the predetermined bit of PilotPNPhase field that arrive the earliest with respect to the time reference of reference pilot that said terminal receives routing update message is the PilotPNPhase field of RouteUpdate message, the predetermined bit of said PilotPNPhase field is 23 bits;
Sending module is used for sending said RouteUpdate message to Access Network.
5. terminal according to claim 4 is characterized in that, said determination module is further used for confirming the PilotPNPhase field in the said RouteUpdate message according to formula (1):
PilotPNPhase=(PilotArrival+ (16384 * PilotPN)) mod 2
23Formula (1), wherein, the multipath component that arrives the earliest that said PilotArrival representes that said terminal receives with respect to the time reference of reference pilot, said PilotPN representes the PN phase place of non-reference pilot district pilots.
6. the switched system of an aerial cellular radio communication is used for the terminal and carries out the switching of aerial cellular radio communication in EVDO REV B system, it is characterized in that said system comprises said terminal and Access Network, wherein:
Said terminal comprises:
Determination module; Be used for confirming that according to the multipath component, the PN phase place of non-reference pilot district pilots and the predetermined bit of PilotPNPhase field that arrive the earliest with respect to the time reference of reference pilot that said terminal receives routing update message is the PilotPNPhase field of RouteUpdate message, the predetermined bit of said PilotPNPhase field is 23 bits;
Sending module is used for sending said RouteUpdate message to Access Network;
Said Access Network is used to receive the said RouteUpdate message that send at said terminal, and according to definite said routing update message, promptly contrary processing of the PilotPNPhase field in the RouteUpdate message confirmed said PilotArrival and said PilotPN.
7. system according to claim 6 is characterized in that, said determination module is further used for confirming the PilotPNPhase field in the said RouteUpdate message according to formula (1):
PilotPNPhase=(PilotArrival+ (16384 * PilotPN)) mod 223 formula (1); Wherein, The multipath component that arrives the earliest with respect to the time reference of reference pilot that said PilotArrival representes that said terminal receives, said PilotPN representes the PN phase place of non-reference pilot district pilots.
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|---|---|---|---|
| CN200810169493A CN101409899B (en) | 2008-10-21 | 2008-10-21 | Switching method, system and terminal for aerial honeycomb wireless communication |
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| CN200810169493A CN101409899B (en) | 2008-10-21 | 2008-10-21 | Switching method, system and terminal for aerial honeycomb wireless communication |
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| Title |
|---|
| 3GPP2 C.S0024-B,cdma2000 High Rate Packet DataAirInterface Specification.2007,第7-39,7-58,7-86,7-136-7-138页. * |
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