CN102469582B - Method and device for paging called user equipment - Google Patents

Abstract

The present invention provides a method for paging a called user equipment, including the following steps: the radio network controller sets the paging indication factor of the called user equipment corresponding to the paging record to 1, and at the PO time of the DRX cycle, the paging indicator is set to The paging indication channel PICH sends the paging indication; the radio network controller puts the paging record into the corresponding paging sub-channel according to the protocol algorithm, if both paging channel transmission blocks PCH TB in the paging sub-channel If there is a paging record, the two PCH TBs are independently encoded with ASN.1 to generate two paging type 1 messages. The invention also provides a device for paging the called user equipment. The solution of the present invention can avoid paging failure caused by different manufacturers due to inconsistency in understanding, thereby improving the paging success rate.

Description

A method and device for paging called user equipment

technical field

The present invention relates to the field of wireless communication technology, in particular to paging technology, in particular to a method and device for paging called user equipment.

Background technique

In a TD-SCDMA system, user equipment (UE) has two basic operating modes: idle mode and connected mode. Idle mode has only one idle (Idle) state. After the UE is turned on, it stays in the idle mode and adopts the discontinuous reception mode. There are four states in UE connection mode: CELL-PCH, URA-PCH, CELL-FACH, CELL-DCH. Among them, the basic characteristics of the CELL_PCH state are: there is no dedicated physical channel connection between the UE and the UTRAN, and the UE cannot use any uplink physical channel. In this state, in order to save power consumption, the UE can use DRX to monitor the paging channel (PCH) indicated by the paging indication channel (PICH). After the UE completes the establishment of the radio resource control (RRC) connection, it will transfer from the idle mode to the connected mode, CELL-FACH or CELL-DCH. The UE returns from connected mode to idle mode when the RRC connection is released.

When the circuit-switched domain (CS)/packet-switched domain (PS) of the core network needs to establish a connection with a user equipment (UE) for data and signaling transmission, or the UMTS terrestrial radio access network (UTRAN) side needs to trigger UE-specific When an event occurs, a paging record will be sent to the UE. If the called party is in Idle state or CELL-PCH state, UTRAN will send a paging type 1 (PagingType 1) message to the user equipment, otherwise it will send a paging type 2 (Paging Type 2) message.

The schematic diagram of Paging Type 1 message sending is shown in Fig. 1, each paging block (Paging Block) is composed of a paging indication channel block (PICH Block) and a paging channel block (PCH Block). The number of frames contained in the paging indicator channel block is represented by N _PICH , the interval between the paging channel block and the paging indicator channel block is represented by _NGAP , and the number of paging sub-channels (Sub-Channel) contained in the paging channel block The number is represented by _NPCH , and each sub-channel occupies two frames, so the paging channel block contains 2×N _PCH frames.

If the paging indication factor corresponding to the UE is 1, the UE must receive the corresponding paging subchannel in the same paging block to determine whether the Paging Type 1 message contains its own UE identity. If yes, the paging is successful, and a paging response is performed. On the contrary, the UE can ignore the subsequent PCH blocks and continue to receive DRX.

Each paging sub-channel in the paging channel block is mapped to two consecutive PCH frames, consistent with the transmission time interval (TTI) of the PCH, and the parameters of the PCH transmission format (TF) are TF=0, TF=1 and TF = 2 three kinds. TF=2 means that a maximum of two PCH transport blocks (TB) can be sent in one TTI.

In the current 25.331, 25.221 and 25.304 protocols, it is not clearly stipulated whether only one Paging Type 1 message can be generated in a paging subchannel. When the TF=2 transmission format is adopted, whether the two PCH TBs are encoded independently to generate a Paging Type 1 message or combined and encoded to generate a Paging Type 1 message. Paging failures often occur on commercial networks, which affects user perception.

Contents of the invention

The invention provides a method and device for paging called user equipment, which can improve the paging success rate.

A method for paging a called user equipment proposed in an embodiment of the present invention includes the following steps:

The radio network controller sets the paging indication factor of the called user equipment corresponding to the paging record to 1, and sends the paging indication through the paging indication channel PICH at the PO time of the DRX cycle;

The radio network controller puts the paging record into the corresponding paging subchannel according to the protocol algorithm, and if both paging channel transmission blocks PCH TB in the paging subchannel have paging records, then the two The PCHTB independently performs ASN.1 encoding to generate two paging type 1 messages.

Preferably, the paging record is put into the corresponding paging sub-channel, if the number of paging records in the paging sub-channel does not exceed the capacity of a paging channel transmission block PCH TB, then the paging sub-channel The first PCH TB in the channel is ASN.1 encoded to generate a Paging Type 1 message.

Preferably, the paging record includes an International Mobile Subscriber Identity IMSI or a Temporary Mobile Subscriber Identity TMSI of the called user equipment.

Preferably, the method further comprises:

A. The user equipment monitors the PICH channel at the PO time of each DRX cycle. If the paging indication factor of the user equipment is detected to be 1, perform step B. If the paging indication factor of the user equipment is detected to be 0, continue to execute Step A;

B. If there are two PCH TBs in the paging sub-channel corresponding to the user equipment, ASN.1 decoding is performed on the two PCH TBs to obtain two paging type 1 messages; if there is only one PCH TB in the paging sub-channel, then This PCH TB performs ASN.1 decoding to obtain a paging type 1 message;

C. The user equipment checks whether the decoded paging type 1 message contains its own user identifier, and if so, the user equipment notifies its own non-access stratum to respond to the paging message.

An apparatus for paging a called user equipment proposed in an embodiment of the present invention, the apparatus is located in a radio network controller, and includes:

The paging indication module is used to set the paging indication factor of the called user equipment corresponding to the paging record to 1, and send the paging indication through the paging indication channel PICH at the PO time of the DRX cycle;

The encoding module is used to put the paging record into the corresponding paging subchannel according to the protocol algorithm. If both paging channel transmission blocks PCH TB have paging records in the paging subchannel, then the two Each PCHTB independently performs ASN.1 encoding to generate two paging type 1 messages.

Preferably, if the number of paging records in the paging subchannel does not exceed the capacity of a paging channel transmission block PCH TB, the encoding module is used to perform ASN on the first PCH TB in the paging subchannel. 1 code to generate a page type 1 message.

By modifying the 25.331 protocol, the present invention clearly stipulates that a paging sub-channel can generate at most two Paging Type 1 messages, and when the TF=2 transmission format is adopted, the paging records of the two PCH TBs in the paging sub-channel must be independently coded. Avoid paging failure caused by different manufacturers due to inconsistent understanding, thereby improving the paging success rate. The present invention adopts two PCH TB independent encoding and decoding methods. Since most of the paging in the existing commercial network is the TMSI type paging issued by the core network, the paging capacity can be significantly improved compared with combining the encoding and decoding of two TBs. , which can increase the paging capacity by up to 25%.

Description of drawings

Figure 1 is a schematic diagram of Paging Type 1 message sending;

Fig. 2 is the processing flowchart of the network side of paging the called device proposed by the embodiment of the present invention;

Fig. 3 is a flow chart of processing on the user side of the method for paging a called device proposed by the embodiment of the invention.

Detailed ways

In the prior art, due to the inconsistency of understanding and implementation between equipment manufacturers and some terminal manufacturers, the reasons why paging failures often occur in commercial networks are analyzed as follows:

Each Paging Type 1 message contains a header information, and the terminal parses the message according to the header information. Assuming that the network side adopts the combined encoding method, the Paging Type 1 message obtained after ASN.1 encoding of all paging records in a paging subchannel is divided into two PCH TBs, and the header information is stored in the first TB. If the terminal side adopts the independent decoding method, the first PCH TB is decoded, and the second PCH TB is decoded separately. Since the second PCH TB has no header information, it cannot be parsed normally, so the The paging record terminal cannot be obtained. If the paging record to the terminal is stored in the second PCH TB, the terminal will fail to paging because it cannot obtain the paging record in the TB.

The processing flow on the network side of the method for paging the called device proposed in the embodiment of the present invention is shown in Figure 2, including the following steps:

Step 201: When processing the paging record, the RNC sets the paging indication factor of the called user equipment corresponding to the paging record to 1, and sends a paging indication (PI) through the PICH channel at PO time of the DRX cycle.

The paging record can be generated by UTRAN itself, or issued by the core network. The paging record includes the International Mobile Subscriber Identity (IMSI, International Mobile Subscriber Identity) or temporary mobile subscriber identity (IMSI) of the called user equipment. TMSI, Temporary Mobile Subscriber Identity).

Step 202: The RNC puts the paging record into the corresponding paging subchannel according to the protocol algorithm. If the number of paging records in the paging sub-channel does not exceed the capacity of the first PCH TB, perform ASN.1 encoding on the first PCH TB in the paging sub-channel to generate a Paging Type1 message. If the two PCH TBs in the paging subchannel have paging records, the two PCH TBs are independently ASN.1 encoded to generate two Paging Type 1 messages.

The processing flow on the user side of the method for paging a called device proposed in the embodiment of the present invention is shown in Figure 3, including the following steps:

Step 301: All user equipments using discontinuous reception will monitor the PICH channel at the corresponding PO time of each DRX cycle, and if their own paging indication factor is 1, then perform step 302, if their own paging indication is heard If the factor is 0, proceed to step 301.

The user equipment uses the discontinuous reception mode in the state of IDLE, CELL_PCH or URA_PCH. The user equipment will only receive the paging message once in each DRX cycle, and the moment of receiving the paging message is called PO moment. In a typical configuration, the length of a DRX cycle is 1.28 seconds, and the PO times of different user equipments are not completely the same. The user equipment monitors the PICH channel at the PO time of each DRX cycle, and is in a "standby" state at other times.

Step 302: If there are two PCH TBs in the paging sub-channel corresponding to the user equipment, perform ASN.1 decoding on the two PCH TBs respectively to obtain two Paging Type 1 messages, if there is only one PCH TB in the paging sub-channel, then Perform ASN.1 decoding on this PCH TB to get a PagingType 1 message.

Step 303: The user equipment checks whether the decoded Paging Type 1 message contains its own user identification, and if so, executes step 304; otherwise, the user equipment continues to perform discontinuous reception, and returns to step 301.

Step 304: the user equipment notifies its own non-access stratum (NAS) to respond to the paging message.

The paging message can only be delivered after ASN.1 encoding. For IMSI-type paging (that is, the paging record contains the IMSI of the called user equipment), the length of each paging record after encoding is 72 bits; for TMSI-type paging For paging (that is, the paging record contains the TMSI of the called user equipment), the message length of each paging record is 40 bits after encoding; each Paging Type 1 message has a 7-bit header information, and the PCH TB size is 240 bits.

Assuming that there are 10 paging records of TMSI type in a paging subchannel, the capacity comparison of two different coding methods is shown in Table 1

Table 1

It can be seen from Table 1 that only 8 paging records of TMSI type can be put into one Paging Type 1 message in combined encoding mode, and two TBs of independent encoding mode can contain at most 10 paging records of TMSI type , increasing the number of paging records by 1/4, and significantly improving the paging capacity.

The embodiment of the present invention also proposes a device for paging the called user equipment, the device is located in the radio network controller, including:

The paging indication module is used to set the paging indication factor of the called user equipment corresponding to the paging record to 1, and send the paging indication through the paging indication channel PICH at the PO time of the DRX cycle;

The encoding module is used to put the paging record into the corresponding paging subchannel according to the protocol algorithm. If both paging channel transmission blocks PCH TB have paging records in the paging subchannel, then the two Each PCHTB independently performs ASN.1 encoding to generate two paging type 1 messages.

Preferably, if the number of paging records in the paging subchannel does not exceed the capacity of a paging channel transmission block PCH TB, the encoding module is used to perform ASN on the first PCH TB in the paging subchannel. 1 code to generate a page type 1 message.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (4)

1. a method for calling called subscriber equipment, is characterized in that, comprises the steps:

Radio network controller is set to 1 by the paging indicator of called subscriber equipment corresponding to paging acknowledgment, constantly by Page Indication Channel PICH, sends paging indicate at the PO of discontinuous reception DRX period; Described PO is the moment of paging receiving message constantly;

Radio network controller is put into described paging acknowledgment in corresponding paging subchannel, if two paging channel transmission block PCH TB have paging acknowledgment in this paging subchannel, two PCH TB are independently carried out to ASN.1 coding and generate two paging Class1 message; If the number of paging acknowledgment does not have to surpass the capacity of a paging channel transmission block PCH TB in paging subchannel, first PCH TB in this paging subchannel is carried out to ASN.1 coding and generate a paging Class1 message.

2. method according to claim 1, is characterized in that, described paging acknowledgment comprises international mobile subscriber identity IMSI or the temporary mobile subscriber identity TMSI of called subscriber equipment.

3. method according to claim 1, is characterized in that, the method further comprises:

A, subscriber equipment are monitored PICH channel constantly at the PO of each DRX cycle, if listen to the paging indicator of subscriber equipment, are 1, perform step B, if listen to the paging indicator of subscriber equipment, are 0, continue execution step A;

If have two PCH TB in paging subchannel corresponding to B subscriber equipment, two PCH TB are carried out respectively to ASN.1 decoding and obtain two paging Class1 message; If only have a PCH TB in paging subchannel, this PCH TB is carried out to ASN.1 decoding and obtain a paging Class1 message;

C, subscriber equipment inspection decoding obtain whether comprising the user ID of self in paging Class1 message, and if so, the Non-Access Stratum of notification of user equipment oneself carries out beep-page message response.

4. a device for calling called subscriber equipment, is characterized in that, described device is positioned at radio network controller, comprising:

Paging indicating module, for the paging indicator of called subscriber equipment corresponding to paging acknowledgment is set to 1, constantly sends paging by Page Indication Channel PICH at the PO of discontinuous reception DRX period and indicates; Described PO is the moment of paging receiving message constantly;

Coding module, for described paging acknowledgment being put into corresponding paging subchannel, if two paging channel transmission block PCH TB have paging acknowledgment in this paging subchannel, independently carries out two PCH TB ASN.1 coding and generates two paging Class1 message; If the number of paging acknowledgment does not have to surpass the capacity of a paging channel transmission block PCH TB in paging subchannel, first PCH TB in this paging subchannel is carried out to ASN.1 coding and generate a paging Class1 message.