CN1972498B

CN1972498B - A method for implementing multi access channel in HRPD communication system

Info

Publication number: CN1972498B
Application number: CN2005101018408A
Authority: CN
Inventors: 张万帅; 陈华; 刘燚灵; 刘英男; 李宗政
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2005-11-24
Filing date: 2005-11-24
Publication date: 2010-04-21
Anticipated expiration: 2025-11-24
Also published as: CN1972498A

Abstract

This invention discloses one method to realize multiple interface signal channel on HRPD communication system, which comprises the following steps: a, establishing signal channels in the system; b, the system is connected with parameters through area composed of area interface signal channel parameters and number; c, AT receives parameters information to compute one interface channel by Harsh formula to get signal long code mask and to connect long signal channel by HRFD agreement and to add one interface section; d, sending reverse signals in channel to compute one signal channel to send reverse signals by step c.

Description

A kind of method that in the HRPD communication system, realizes many access channels

Technical field:

The present invention relates to the mobile communication technology field, specifically, relate to a kind of method that in HRPD (High RatePacket Data, HRPD (high rate packet data)) communication system, realizes many access channels.

Background technology:

Access channel is to be used for AT (Access Terminal accesses terminal) to send the channel of backward signaling to AN (Access Network, access network), and the HRPD agreement stipulates that each sub-district has only an access channel.

Access channel is identified by Long Code Mask, and the access channel Long Code Mask structure of HRPD agreement regulation is as shown in table 1.

Bit	41	40	[39∶32]	[31∶0]
Bit	41	40	[39∶32]	[31∶0]	MI _ACMAC	1	1	AccessCycleNumber	Permuted(ColorCode\|SectorID[23∶0])

Table 1 access channel Long Code Mask

Long Code Mask (the MI of access channel _ACMAC, Long Code Mask of I of Access Channel, access channel I road Long Code Mask) constitute by AccessCycleNumber (access period number) and out of order ColorCode (colour coding), SectorID (cell identification number).

Table 2 is " AccessParameter (access parameter) " message structure of HRPD agreement regulation, this message specifies the parameter of access channel.

Field	Length (bit)
Field	Length (bit)	MessageID (message name)	8
AccessCycleDuration (access period length)	8	MessageID (message name)	8
AccessCycleDuration (access period length)	8	AccessSignature (access label)	16
OpenLoopAdjust (open loop adjustment)	8	AccessSignature (access label)	16
OpenLoopAdjust (open loop adjustment)	8	ProbeInitialAdjust (sound out initially and adjust)	5
ProbeNumStep (exploration step number)	4	ProbeInitialAdjust (sound out initially and adjust)	5
ProbeNumStep (exploration step number)	4	PowerStep (power step size)	4
PreambleLength (prefix length)	3	PowerStep (power step size)	4

Field	Length (bit)
Field	Length (bit)	CapsuleLengthMax (bag maximum length)	4
Apersistence (continuing number)	6(N _ACMPAPersistInferior)	CapsuleLengthMax (bag maximum length)	4
Apersistence (continuing number)	6(N _ACMPAPersistInferior)	Reserved (reservation)	Variable

Table 2 access parameter messages

In the HRPD communication system, all AT under the same sub-district all adopt access channel to transmit backward signaling.If the AT quantity under the sub-district is a lot, a large amount of backward signalings concentrate on the access channel and transmit, the probability height that bumps, thus cause signaling delay even failure.

Summary of the invention:

Technical problem to be solved by this invention is, collision probability height when a plurality of AT under the same sub-district use an access channel to send backward signaling, thus cause the problem of signaling transmission lag or failure.

For addressing the above problem, the present invention adopts the method for setting up many access channels under a sub-district, AT under the sub-district is distributed on many access channels sends backward signaling, specifically may further comprise the steps:

First step HRPD communication system is set up many access channels according to what of the quantity of AT under the sub-district or base station physical resource;

The second step HRPD communication system is broadcasted access parameter messages by the base station in the sub-district, comprised access channel parameter and the access channel quantity under the sub-district in access parameter messages;

After the 3rd step, AT received access parameter messages, calculate an access channel that should use according to hash algorithm, and obtain the Long Code Mask of access channel;

When the 4th step, AT sent backward signaling on access channel, use an access channel that calculates in the 3rd step to send backward signaling.

Hash function uses AT hardware identification number or AT number as parameter in the described hash algorithm of the 3rd step; The Long Code Mask of described access channel is compared to the access channel Long Code Mask of stipulating in the HRPD consensus standard, has increased an access channel field, and the length bit number of this field is identical with access channel amount field length bit number; The access channel numbering is corresponding one by one with the access channel field in this access channel Long Code Mask; Make that so different access channel Long Code Masks is inequality, different access channels can be made a distinction;

The present invention makes the AT under the same sub-district can be distributed to many access channels by above-mentioned operations step, and sends backward signaling by access channel, has reduced the collision probability of backward signaling.

Description of drawings

Fig. 1 is a HRPD communication system access parameter messages schematic diagram of the present invention.

Fig. 2 is a HRPD communication system access channel Long Code Mask schematic diagram of the present invention.

Fig. 3 sets up session diagram for AT in the HRPD communication system of the present invention uses access channel to send backward signaling.

Embodiment

Also the present invention is described in further detail in conjunction with the accompanying drawings below by embodiment.

Figure 1 shows that HRPD communication system access parameter messages schematic diagram of the present invention.Be compared to the access parameter messages of stipulating in the HRPD agreement, increased a field " AccessChannel Count (access channel quantity) ", how many length bit numbers of this field can deciding according to what or the base station physical resource of AT under the sub-district, need the access channel of foundation many, this field length bit number just should be big more.This fields specify the access channel quantity under the sub-district, if the numerical value of this field is N, expression has N bar access channel under the sub-district, and these access channels be numbered 0 ~ N-1.

Figure 2 shows that HRPD communication system access channel Long Code Mask schematic diagram of the present invention.Be compared to the access channel Long Code Mask of stipulating in the HRPD standard, increased a field " AccessChannelNumber (access channel number) ", the length bit number of this field is identical with field " AccessChannelCount (access channel quantity) " length bit number among Fig. 1." AccessChannelNumber (access channel number) " field in access channel numbering and this access channel Long Code Mask is corresponding one by one.Be numbered the access channel of N, " AccessChannelNumber (access channel number) " numerical value in its Long Code Mask is N.Like this, make that different access channel Long Code Masks is inequality, different access channels can be made a distinction.

Fig. 3 uses access channel to send backward signaling for AT in the HRPD communication system of the present invention and AN sets up session diagram.

301, AN sets up many access channels, and periodically sends access parameter messages in the sub-district according to the form among Fig. 1 according to what or the base station physical resource situation of AT under the sub-district, has comprised the number and the employed parameter of access channel of access channel in the message;

302, receive " access parameter " message that AN sends after the AT start, obtain access channel number and access channel parameter, use then self hardware identification number and the access channel number as the parameter of hash function, calculate an employed access channel, the employed Long Code Mask of this access channel generates by form shown in Figure 2, and on this access channel, send UATIRequest (Unicast AccessTerminal Identifier Request, clean culture access terminal identifier request) message to AN;

303, after AN receives the UATIRequest message of AT transmission, return ACAck (AccessAcknowledge, admission confirm) message to AT;

304, AN sends UATIAssignment (Unicast Access TerminalIdentifier Assignment to AT, the clean culture identifier assignment that accesses terminal) message, distribute UATI (Unicast Access Terminal Identifier, clean culture access terminal identifier) to AT;

305, after AT receives the UATIAssignment message that AN sends, on access channel, return UATIComplete (Unicast Access Terminal Identifier Complete, the clean culture identifier that accesses terminal is finished) message to AN;

306, after AN receives the UATIComplete message of AT transmission, return ACAck message to AT, the session between AT and AN is so far set up and is finished.

In sum, the method that realizes many access channels in the HRPD communication system by the present invention proposes can send backward signaling so that the AT under the same sub-district is distributed to different access channels, thereby reduce the collision probability of signaling.

Claims

1. method that realizes many access channels in the HRPD communication system is characterized in that may further comprise the steps:

1.1 HRPD (high rate packet data) HRPD communication system is set up many access channels;

1.2HRPD communication system is broadcasted access parameter messages by the base station in the sub-district, comprised access channel parameter and the access channel quantity under the sub-district in access parameter messages;

1.3 after access terminal AT is received access parameter messages, calculate an access channel that should use, and obtain the Long Code Mask of access channel according to hash algorithm;

The Long Code Mask of described access channel is compared to the access channel Long Code Mask of stipulating in the HRPD consensus standard, increased an access channel field, the field length bit number of the access channel quantity in the length bit number of this field and the access parameter messages is identical; The access channel numbering is corresponding one by one with the access channel field in this access channel Long Code Mask; Make that so different access channel Long Code Masks is inequality, different access channels can be made a distinction;

1.4AT when on access channel, sending backward signaling, use an access channel that calculates in 1.3 steps to send backward signaling.

2. method according to claim 1 is characterized in that, the described HRPD communication system of step 1.1 is according to many access channels of how much setting up of the quantity of AT under the sub-district or base station physical resource.

3. method according to claim 1 is characterized in that, hash function uses AT hardware identification number or AT number as parameter in the described hash algorithm of step 1.3.