CN1241422C - Method for connecting mobile station into network in mobile communication system - Google Patents

Abstract

The present invention relates to a method for mobile stations being accessed to networks in mobile communication systems. The method comprises the following steps: firstly, a corresponding number of accessing marks are arranged according to the number of mobile stations allowed being accessed to by a base station; the mobile stations obtain the accessing marks and upload the accessing marks and the users' information thereof to the base station and an access request is carried out; the base station determines whether the mobile stations can be accessed to a communication network according to the information uploaded by the mobile stations and the accessing marks are retracted by the base station after the accessing process of the mobile stations is completed. The uniqueness of the accessing marks in the process of accessing the mobile stations causes the present invention to be capable of effectively limiting the number of users simultaneously accessed to a communication network, which lowers the probability of mutual collision among users in the process of accessing and simultaneously, reduces the interference of the information of users accessed to a network to users' signals in uplinks. Therefore, the method for mobile stations being accessed to networks in mobile communication systems provided by the present invention greatly enhances the performance of mobile communication systems and ensures the communication quality of mobile communication systems.

Description

Method for mobile station to access network in mobile communication system

technical field

The invention relates to the technical field of mobile communication, in particular to a method for a mobile station to access a network in a mobile communication system.

Background technique

In a mobile communication system, a UE (user, ie a mobile station) communicates with a network through a base station. When the UE is turned on or roaming, its first task is to find the network and get in touch with the base station in the network, so as to obtain the service of the mobile communication network. Therefore, the behavior of the UE in idle mode is crucial for the UE.

At present, in the WCDMA (Wideband Code Division Multiple Access) mobile communication system, the UE finds the network and gets in touch with the base station in the network through the following process, as shown in Figure 1:

Step (1): deriving available uplink access time slots in the RACH (random access channel) subchannel group of the selected base station;

Step (2): Randomly select a Signature from available identification Signature (signal) identifiers for the specified ASC (Access Service Class), and:

Set prefix retransmission count "Preamble_Retrans_Max";

Set the prefix transmission power "Preamble_Initial_Power";

Step (3): Using the selected uplink access time slot, identifying the Signature identifier, and prefix transmission power parameters to transmit a prefix access signal;

Step (4): In the downlink access slot corresponding to the selected uplink access slot, whether there is an acquisition indication value related to the selected identification Signature identifier, if there is, perform step (5) , otherwise, go to step (6);

Step (5): Determine whether the mobile station can access the mobile communication network according to the detected acquisition indication value related to the selected identification Signature mark, and perform step (7);

Step (6): Within the range of times allowed for access, reselect an uplink access time slot as an available access time slot; select the Signature identifier; increase the prefix transmission power, transmit the prefix access signal again, and perform the steps (4);

Step (7): end and exit the random access process.

From the above UE access process, it can be seen that all UEs in the cell can initiate the access process at any time selected, and if the first access is unsuccessful, the power of the access preamble code will be continuously increased, so that For the FDD (Frequency Division Multiple Access) system, especially for the uplink channel of the TDD (Time Division Duplex) system (if multiple UEs share an uplink channel), it will cause a relatively high probability of collisions, and in this time slot The power used for the preamble access signal is relatively large. At this time, if multiple users transmit the Preamble access signal at the same time, serious interference will be generated to the data transmitted in the time slot. Therefore, it is necessary to use a control mechanism to limit the number of users that can initiate access within a time slot.

Contents of the invention

The purpose of the present invention is to provide a method for a mobile station to access the network in a mobile communication system, to control the number of users who simultaneously access the network, so that the system has a reasonable uplink transmission power, thereby ensuring the quality of service in the mobile communication network.

The purpose of the present invention is achieved like this: the method for mobile station access network in mobile communication system, comprises:

(1) Set a corresponding number of access identifiers according to the number of mobile stations allowed to be accessed by the base station;

(2) The base station sends the access identifier within the corresponding cell range;

(3) The mobile station obtains the access identifier, and uploads the access identifier and the user information of the mobile station to the base station to perform an access request;

(4) The base station determines whether the mobile station can access according to the information uploaded by the mobile station, if it can be accessed, then perform step (5), otherwise, perform step (3);

(5) Make the mobile station communicate within the cell.

Described step (3) comprises:

(21) The mobile station randomly selects an access identifier;

(22) Upload the user identification of the mobile station and the access identification to the base station.

The step (2) is: the base station broadcasts the access identifier within the corresponding cell range.

Described step (3) comprises:

(41) The mobile station determines an access identifier from the base station of the cell;

(42) Upload the user identity of the mobile station and the access identity to the base station.

Described step (4) comprises:

(51) The base station receives the access request information uploaded by the mobile station;

(52) According to the received access request information, judge whether the mobile station is the mobile station with the largest signal power among the mobile stations using the same access identifier to access, if it is the largest, then perform step (53), otherwise, perform step (54);

(53) allowing the mobile station to use the access identifier to access the network;

(54) Prohibit the mobile station from using the access identifier to access the network, and make the mobile station re-enter the access request process.

Described step (5) comprises:

(61) converting the access identifier for the mobile station to access the network application into an identification code for the mobile station to communicate in the cell;

(62) The mobile station uses the identification code to process communication services in the cell, and sends the access identifier back to the base station.

Described step (61) is: after the access identification of this mobile station, affix parameter m respectively as the identification code of mobile station, the value of m is 1, 2, ..., M, M=community can accommodate The number of users/the total number of access identifiers in the cell.

It can be seen from the above existing technical solutions that the present invention adopts a method for accessing a communication network by using an access identifier. After obtaining an access identifier, the UE uploads the access identifier information and UE identity information to the NodeB. (base station), after receiving the information uploaded by the UE, the NodeB selects a user with good signal quality to allow access. During the access process, each user fixedly uses an access ID, and during the user access process, the access ID will no longer be broadcast and sent within the cell range. The invention reduces the probability of mutual collision between users in the access process, and at the same time limits the number of access signals sent at the same time; reduces the number of uplink transmission channels, which can reduce the total power of uplink ; If the total upload power is reduced, the interference of user access network information on the user signal in the uplink can be reduced. The invention can also control the number of users accessing the communication network at the same time, so as to reduce the mutual interference between users in the uplink in the cell. Therefore, the method for the mobile station to access the network in the mobile communication system provided by the present invention greatly improves the performance of the mobile communication system and ensures the communication quality in the mobile communication system.

Description of drawings

Fig. 1 is the process that the mobile station accesses the mobile communication network in the existing WCDMA system;

Fig. 2 shows the process of the mobile station accessing the mobile communication network in the present invention.

Detailed ways

The specific implementation of the method for the mobile station accessing the network in the mobile communication system of the present invention is described as follows in conjunction with the accompanying drawings, referring to Fig. 2:

Step 1: Set a corresponding number of access identifiers according to the number of mobile stations allowed to be accessed by the base station;

The number of mobile stations allowed to be accessed by the base station is determined by the number of uplink resources in the cell of the base station. Each uplink resource corresponds to a mobile station allowed to access, and each mobile station allowed to access corresponds to an access identifier of the cell of the base station;

The access identifier can be a serial number;

Step 2: The base station broadcasts the available access identifier within the cell range, so that the mobile station can obtain the access identifier and make an access request;

Step 3: When the mobile station needs to access the mobile communication network, it receives the usable access identifier broadcast by the base station within the cell range;

Step 4: The mobile station judges whether there is an access identifier that can be used in the received information, if it exists, perform step 5, otherwise, perform step 3;

Step 5: Randomly select an access identifier after receiving the access identifier broadcast by the base station from the mobile station;

Step 6: The mobile station uploads its own user identification and the access identification to the base station, and makes an access request;

Step 7: The base station receives the access request information uploaded by the mobile station;

Step 8: According to the received access request information, it is judged whether the mobile station is the mobile station with the highest signal power among the mobile stations using the same access identifier for access, if it is the largest, then perform step 9, otherwise, perform step 10;

Step 9: Allow the mobile station to use the access identifier to access the network, and perform step 11;

Step 10: Prohibit the mobile station from using the access identifier to access the network, and make the mobile station re-enter the access request process, and perform step 3;

Step 11: converting the access identifier of the mobile station to access the network application into an identification code for the mobile station to communicate in the cell;

That is, after the access identifier of the mobile station, add the parameter m as the identification code of the mobile station, and the value of m is 1, 2, ..., M, and M=the number of users that the cell can accommodate/ The total number of access identifiers in the cell;

Step 12: The mobile station uses the identity code to process communication services in the cell; the value of m is different for users who use the same access ID to access, for example, the first user who uses the access ID to access m value of 1, then the value of m of the second user who accesses with this access ID is 2, and so on, so the mobile station ID code formed by them is also unique within the cell range of the base station, and can be used identification during communication. At the same time, the mobile station sends the access identifier back to the base station, and the base station rebroadcasts the access identifier in the cell range to provide it to other mobile stations for access requests.

After the above process, the mobile station can access the mobile communication network and process communication services in the communication network. The invention effectively limits the total amount of accessing mobile stations in the cell of the base station and ensures the communication quality in the cell.

Step 2, step 3, step 4, and step 5 in the above process can also be: first, an access identifier is preset for the mobile station, and the mobile station can only use the access identifier to make an access request, and the base station will The current use of the access identifier in the cell determines whether the user is allowed to access the mobile communication network.

Claims (7)

1, the method for travelling carriage access network in a kind of mobile communication system comprises:

(1) allow the travelling carriage number of access that the access sign of respective numbers is set according to the base station;

(2) base station is identified at access in the corresponding cell range and sends;

(3) travelling carriage obtains and inserts sign, and will insert and identify and the user profile of travelling carriage is uploaded to the base station, inserts request;

(4) information uploaded according to travelling carriage of base station determines whether travelling carriage can insert, if can insert, and execution in step (5) then, otherwise, execution in step (3);

(5) make this travelling carriage in this sub-district, communicate.

2, the method for travelling carriage access network in the mobile communication system according to claim 1 is characterized in that described step (3) comprising:

(21) travelling carriage selects one to insert sign at random;

(22) user ID and this access sign with travelling carriage is uploaded to the base station.

3, the method for travelling carriage access network in the mobile communication system according to claim 1 is characterized in that described step (2) is: the base station is adopted the mode of broadcasting that access is identified in the corresponding cell range and is sent.

4, the method for travelling carriage access network in the mobile communication system according to claim 1 is characterized in that described step (3) comprising:

(41) travelling carriage is determined an access sign from this cell base station;

(42) user ID and this access sign with travelling carriage is uploaded to the base station.

5,, it is characterized in that described step (4) comprising according to the method for travelling carriage access network in claim 1, the 2 or 4 described mobile communication system:

(51) the request access information uploaded of base station receiving mobile;

(52) according to the request access information that receives, judge that whether this travelling carriage is the travelling carriage of using signal power maximum in the travelling carriage that same access sign inserts, if maximum, execution in step (53) then, otherwise, execution in step (54);

(53) allow this travelling carriage to use this access sign access network;

(54) forbid that this travelling carriage uses this access sign access network, and make this travelling carriage reenter the access request process.

6, the method for travelling carriage access network in the mobile communication system according to claim 1 is characterized in that described step (5) comprising:

(61) the access sign of this travelling carriage access network being used is converted into the identity code that travelling carriage is communicated by letter in the sub-district;

(62) travelling carriage is used this identity code and communicate Business Processing in the sub-district, and should insert sign and send the base station back to.

7, the method for travelling carriage access network in the mobile communication system according to claim 6, it is characterized in that described step (61) is: after the access sign of this travelling carriage, sew the identity code of parameter m respectively as travelling carriage, the value of m is 1,2, M inserts the sign total amount in open ended number of users/sub-district, M=sub-district.

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