CN1964404B

CN1964404B - A method for forwarded-to incoming call notification in NGN

Info

Publication number: CN1964404B
Application number: CN2006100627795A
Authority: CN
Inventors: 林勇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-09-22
Filing date: 2006-09-22
Publication date: 2010-06-02
Anticipated expiration: 2026-09-22
Also published as: CN1964404A

Abstract

The provided notice method for last transfer calling in NGN system comprises: for the transfer calling, once the called answers, the system can display prompt speech to notify this is the last transfer calling. This invention is convenient to know whether the coming calling is last transfer or common one to select proper process method and then increase satisfaction level for user.

Description

The method of forwarded-to incoming call notification among a kind of NGN

Technical field

The invention belongs to the communications field, relate in particular to the method for forwarded-to incoming call notification among a kind of NGN.

Background technology

In next generation network NGN system, for the calling that preceding transfers, (this business allows the user that the number of another appointment is transferred in his all incoming calls, and no matter what state the user is under, CFU such as unconditioned call connection.), calling forwarding on busy, (if registered should business for the user, then all are meeting the number that all is automatically brought to another appointment when busy, CFB to this user's incoming call.), no-answer call connection (if registered should business for the user, then when the phone of calling out this user within the predetermined time during no response, transfers the call to the number of another appointment, CFNR.) etc., telephone terminal can't know that this is the calling that transfers before, such as: A calls out B, forwards C before the B to, when A calls out B, the C ring, if the C off-hook just and A converse, user C and do not know B before the calling that transfers, if A directly calls C, to C user is the same experience, and calling number all is shown as A, can't distinguish in two kinds of situation.

Have in fixed network at present and use the mode of distinctive ringing to notify forward call, the calling that transfers before making exactly is a kind of the tinkle of bells, and the non-preceding calling of changeing is a kind of the tinkle of bells; In the network that moves, give the prompting of literal by mobile phone terminal.Yet the prompting technology among the mobile network can't be applied in the present fixed network, because the terminal of fixed network does not have the intelligent function of mobile phone terminal; And the distinctive ringing mode that fixed network uses at present is defective: the have any different function of ring of switch itself, and have with this function of forward call distinctive ringing and to conflict, the user still can't know the calling that transfers before this calling is; Under NGN, need gateway to support distinctive ringing in addition, cause not supporting that the gateway user of this ability can't use; The mode of distinctive ringing need be distinguished the tinkle of bells, does not have voice prompting mode direct.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method, makes calledly can be informed to this conversation for forward call.

For achieving the above object, the invention provides the method for forwarded-to incoming call notification among a kind of NGN, this method comprises:

Steps A: user A initiates basic call, and soft switch is inquired about called B and whether registered the forwarded calls business, if, and satisfy and trigger preceding commentaries on classics condition, then be routed to forwarding subscriber C;

Step B: if user C off-hook, soft switch application MRS media resource, this calling of notice C is a forward call.

Wherein, also comprise step C: if notice finishes all not on-hooks of calling and called, A and C are then connected in soft switch; Calling and called any one party on-hook before if notice finishes, soft switch then finishes this calling.

Wherein, to notify this calling by playing alert tones to forwarding subscriber be a forward call to MRS.

Wherein, among the step B, accept in the process of notice at called off-hook, soft switch does not send ANM to forward office.

Wherein, steps A: user A calling party B, soft switch detects the IAM message that PSTN sends, and judges whether the calling for preceding transferring, if then be routed to forwarding subscriber C;

Wherein, steps A is specially: user A calling party B, and whether the transferred number in the IAM message that soft switch detection PSTN sends is consistent with called number, if inconsistent, the calling that transfers before then being judged as is routed to forwarding subscriber C.

Wherein, steps A is specially: user A calling party B, the preceding commentaries on classics sign in the IAM message that soft switch detection PSTN sends judges whether it is the calling that transfers before, if then be routed to forwarding subscriber C.

Adopt the present invention can make the user when call establishment with regard to knowing calling or the ordinary call of changeing before this is, can select whether to answer to the calling of preceding commentaries on classics; If on-hook during playing alert tones, this time calling is not chargeed, and therefore can improve client's satisfaction.

Description of drawings

Fig. 1 is a calling schematic diagram of the present invention;

Fig. 2 is the flow chart of the inventive method.

Embodiment

The present invention is the method for forwarded-to incoming call notification among a kind of NGN, for making purpose of the present invention, technical scheme and advantage clearer, below with reference to accompanying drawing, the present invention is described in more detail.

As shown in Figure 1, user B is the subscriber of forward call, when user A when user B initiates basic call and satisfies the forward call condition, this Call Forwarding is to user C; User D is the subscriber of forward call, when user A when user D initiates basic call and satisfies the forward call condition, this Call Forwarding is to user C.For user C, this twice forward call belongs to two kinds of situations respectively: a kind of is the calling that transfers by before the public switch telephone network PSTN, and a kind of is the calling that transfers before this intra-office.Introduce specific implementation of the present invention in both cases below respectively:

(1) calling by transferring before the PSTN

As shown in Figure 1, user A calling party B, this Call Forwarding is to user C, PSTN routes the call to soft switch, PSTN adopts ISDN User Part to send to the initial address message (IAM) of soft switch, and (initialaddress message IAM) comprises calling number A, called number C in the message, transferred number B, soft switch detects this transferred number and called number, finds inconsistently, then judges the calling that transfers before this calling is, the called C that continues, the C ring; Perhaps, soft switch detects the calling of preceding commentaries on classics sign to transfer before judging whether to be one in this IAM message, if, the called C that then continues, C ring; If the C off-hook, soft switch application media resource MRS, the calling that transfers before notifying called C to call out to be; Listen in the process of playback notice at called off-hook, soft switch does not send response message, and (answer message ANM) gives forward office, guarantees like this that in the process of playback caller can not start charging also in ring; All not on-hooks of calling and called if notice finishes, calling and called A and C then continue; If live called either party user's on-hook then finish this time calling, remove speech channel.

(2) calling that before this intra-office, transfers

As shown in Figure 1, user B ' is the local subscriber who directly links to each other by media gateway and soft switch with user C.User A calling party B ', this Call Forwarding is to user C, because user B is the Call Forwarding services of registering in soft switch, by turning over journey before the soft switch control, so a calling that transfers before this calling is is known in soft switch certainly, then the called C that continues, the C ring; If the C off-hook, soft switch application media resource MRS, the calling that transfers before notifying called C to call out to be; Listen in the process of playback notice at called off-hook, soft switch does not send ANM to forward office, guarantees like this in the process of playback, and caller can not start charging also in ring; All not on-hooks of calling and called if notice finishes, calling and called A and C then continue; If speech channel is removed in either party on-hook of calling and called then finish this time calling.

Preferably, utilize the mode of the playing alert tones of very directly understanding to notify called this to call out and be forward call.Playback prompting process employing standard H.248 agreement is carried out.

As shown in Figure 2, the concrete enforcement handling process of realization the inventive method is as follows:

101: the caller off-hook, the terminal A0 of caller correspondence reports this incident by NTFY_REQ message to soft switch, and soft switch acknowledges receipt of user's off-hook event, responds and answers message NTFY_REPLY;

102: soft switch is put dialing tone by the calling subscriber of MOD_REQ order indication calling terminal A0 correspondence; Terminal A0 responds MOD_REPLY message;

103: the caller dialing, terminal A0 reports soft switch by NTFY_REQ message with the number of collecting, and soft switch sends the NTFY_REQ order and acknowledges receipt of this message;

104: soft switch sends ADD_REQ message, requires terminal A0 is added among the newly-established context Context, and terminal A0 responds ADD_REPLY message;

105: the flexible exchange analysis called number, find the terminal of called correspondence, send ring to this terminal correspondence called; When triggering the forwarded calls condition, this Call Forwarding is to C, and the terminal C0 of C correspondence is found in soft switch, sends ADD_REQ message to C0, requires terminal C0 is added among the newly-established Context, and terminal C0 responds ADD_REPLY message;

106: soft switch is put ring back tone by the called subscriber of MOD_REQ order indication terminal called C0 correspondence; And put ring-back tone by the calling subscriber of MOD_REQ order indication calling terminal A0 correspondence; Terminal is replied MOD_REPLY message;

107: called off-hook, terminal called are sent out NTFY_REQ and are reported this incident to soft switch; NTFY_REPLY is responded in soft switch; Soft switch issues MOD_REQ and orders to terminal called C0, and terminal is replied MOD_REPLY message;

108: soft switch sends ADD_REQ message to Media Resource Server, and MRS is to called playback in application, and MRS responds ADD_REPLY message; Soft switch issues the MOD_REQ order and revises the MRS attribute, and MRS replys MOD_REPLY message, and to called C playing alert tones;

109: the timer time that soft switch is set arrives, the context Context between soft switch deletion terminal called C0 and MRS; Perhaps finish when MRS plays voice suggestion, send NTFY-_REQ to soft switch and report this incident, NTFY_REPLY is replied in soft switch, and sends the context Context between SUB_REQ order deletion terminal C0 and MRS, and MRS replys SUB_REPLY;

110: soft switch sends the MOD_REQ order and revises calling terminal A0 attribute, and A0 replys MOD_REPLY message, connects calling and called, begins conversation.

Caller or Called Onhook in above any step, soft switch promptly order gateway to discharge the calling and called connection, with calling/called port emptying Context.If caller or Called Onhook during playback then finish this calling, expression is not answered, because caller do not receive answer signal, so the calling that caller is answered called refusal accounting fee not.

This invention is suitable for equally the situation of changeing before the multiple domain that calling and called adhere to different soft switch separately, on the flow process just in step 105 many one seek called under the process of soft switch, other steps are identical.

Claims

1. the method for forwarded-to incoming call notification among the NGN is characterized in that, comprising:

Steps A: user A calling party B, soft switch judges whether this calling is forwarded calls, if then be routed to forwarding subscriber C;

Step B: if user C off-hook, soft switch application media resource MRS, this calling of notice C is a forward call.

2. the method for forwarded-to incoming call notification among the NGN according to claim 1 is characterized in that:

Also comprise step C: if notice finishes all not on-hooks of calling and called, A and C are then connected in soft switch; Calling and called any one party on-hook before if notice finishes, soft switch then finishes this calling.

3. the method for forwarded-to incoming call notification among the NGN according to claim 1 is characterized in that:

It is a forward call that MRS notifies this calling by playing alert tones to forwarding subscriber.

4. the method for forwarded-to incoming call notification among the NGN according to claim 1 is characterized in that:

Among the step B, accept in the process of notice at called off-hook, soft switch does not send ANM to forward office.

5. as claim 1-4 method of forwarded-to incoming call notification among the NGN as described in each, it is characterized in that:

Steps A is specially: user A calling party B, and whether the transferred number in the IAM message that soft switch detection PSTN sends is consistent with called number, if inconsistent, the calling that transfers before then being judged as is routed to forwarding subscriber C.

6. as claim 1-4 method of forwarded-to incoming call notification among the NGN as described in each, it is characterized in that:

Steps A is specially: user A calling party B, the preceding commentaries on classics sign in the IAM message that soft switch detection PSTN sends judges whether it is the calling that transfers before, if then be routed to forwarding subscriber C.

7. as claim 1-4 method of forwarded-to incoming call notification among the NGN as described in each, it is characterized in that:

User A calling party B, soft switch is inquired about called B and whether has been registered the forwarded calls business, if, and satisfy and trigger preceding commentaries on classics condition, then be routed to forwarding subscriber C.