WO2008025290A1 - Système de communication mobile, dispositif et procédé d'accès aléatoire - Google Patents

Système de communication mobile, dispositif et procédé d'accès aléatoire Download PDF

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Publication number
WO2008025290A1
WO2008025290A1 PCT/CN2007/070528 CN2007070528W WO2008025290A1 WO 2008025290 A1 WO2008025290 A1 WO 2008025290A1 CN 2007070528 W CN2007070528 W CN 2007070528W WO 2008025290 A1 WO2008025290 A1 WO 2008025290A1
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WIPO (PCT)
Prior art keywords
random access
service
quality
access sequence
access
Prior art date
Application number
PCT/CN2007/070528
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English (en)
Chinese (zh)
Inventor
Quanzhong Gao
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Huawei Technologies Co., Ltd.
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008025290A1 publication Critical patent/WO2008025290A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • H04W74/0875—Non-scheduled access, e.g. ALOHA using a dedicated channel for access with assigned priorities based access

Definitions

  • the present invention relates to the field of mobile communications, and in particular to a random access technology in a mobile communication system. Background technique
  • the access control technology is a control method for accessing a wireless channel in a user equipment (User Equipment, referred to as "UE") in a wireless communication system.
  • UE User Equipment
  • the UE when the UE moves in each neighboring cell, after entering a certain cell to complete the location registration, the UE camps in the cell and enters an idle state, and the cell is also referred to as the current UE. Community.
  • the idle state if the UE performs the cell location update process, or needs to respond to the paging of the cell, or needs to establish a call with other users, including a service request, a short message request, etc., the UE sends the message to the current cell base station. Access request.
  • the random access procedure is initiated by the UE. The UE sends an access request to the cell base station on the random access channel to perform access probe.
  • the network side After receiving the access request of the UE, the network side allocates a message to the UE on a common channel, and then the UE and the base station perform data interaction on the allocated specific channel. It should also be noted that the random access procedure initiated by the UE is performed according to the access resources of the current cell base station and according to a specific algorithm. The UE selects an access slot in the available access resources, and the selection is random. After receiving the access probe of the UE, the base station sends an access indication message to the UE, indicating whether the current UE is connected. Successful. If the random access is unsuccessful, the UE cannot perform data interaction with the current cell, and cannot complete the function of call or data transmission.
  • the response paging and the information that the UE completely originates that is, the response to the paging from the cell as described above, and Other users establish calls, including service requests, sending short message requests, and the like.
  • the signal of the spatial interface will be confused, which will lead to the receiving end.
  • the transmitter signal cannot be demodulated correctly, which becomes a random access collision.
  • the random access method is a process of initiating access by means of a probe, the contents of the probe can be modulated with mutually orthogonal code groups in order to reduce collisions.
  • access sequences such as Walsh sequences, Golay sequences, and so on.
  • a Walsh code is a set of code sequences consisting of 0, 1, or 1, -1, with a length of 2 to the power of n.
  • a 1024-dimensional Walsh code has 1024 different code sequences, and each sequence has a length of 1024 bits, which can be called 1024 code spaces, and each of the two code sequences is orthogonal.
  • the sequence modulation will also cause mutual interference, so that the receiving end can not solve useful information.
  • the conflicts caused by different UEs simultaneously using the same access sequence modulation may be divided into conflicts between UEs responding to paging, and between paging UEs and originating UEs.
  • the 1024-dimensional Walsh code is used to modulate the content of the access probe.
  • the index number of 1024 code spaces is 0 - 1023, where the index number is 0 - 17
  • the reservation is given to the active set for handover, power control and time correction.
  • the index number is 18 - 1023 (1006 total), which is reserved for the UE to send access probes.
  • the transmitted access probe includes response paging.
  • the UE sends a probe for the cause value such as the start call.
  • the Walsh code that can be used by the UE is divided into nine groups, as shown in Table 1, wherein each row 1 to 9 sequence number of the partitionNsize corresponds to the access sequence information included in the nine groups, where the SI
  • the values of S2 and S3 are defined as shown in Table 2, where fl00r(N A CMPNumSequence/18 ) is a constant of NACMPNumSeqw divided by 18 and then taken down to an integer. Constant NACMPNumSeqw by protocol
  • Each UE sends a paging response after accessing and being paged, selects one group from the nine groups according to its channel quality and request level, as shown in Table 3, and then randomly selects one from the group.
  • the incoming sequence is used for the random access probe, wherein the request level generally corresponds to
  • Each row in Table 1 is an allocation method, and one (ie one row) is generally selected from one cell as nine groups; Allocation.
  • the network side cannot utilize the access resources more reasonably, and cannot perform the admission and priority processing according to the service priority and the user priority.
  • An embodiment of the present invention provides a mobile communication system and a random access method thereof, so that the user equipment can quickly transmit the Quality of Service (QoS) information of the call to the network side.
  • QoS Quality of Service
  • Another aspect of an embodiment of the present invention is to provide an apparatus in a mobile communication system.
  • a random access method in a mobile communication system comprising the following steps:
  • a mobile communication system including a user equipment and a base station
  • the user equipment is configured to send a random access probe, and the access sequence of the random access probe is selected according to the quality of service information;
  • the base station is configured to receive the random access probe, obtain, according to the access sequence, quality of service information corresponding to the access sequence, and use the quality of service information corresponding to the access sequence to the user
  • the device performs random access control.
  • a user equipment comprising:
  • An access sequence selection unit configured to select an access sequence according to the quality of service information
  • a sending unit configured to send a random access probe, where the random access probe includes the selected access sequence.
  • a base station comprising:
  • a receiving detection unit configured to receive a random access probe from the user equipment, and obtain, according to the access sequence in the random access probe, quality of service information corresponding to the access sequence
  • an access control unit configured to perform random access control on the user equipment according to the quality of service information corresponding to the access sequence.
  • the UE When the UE responds to the paging and/or initiates the call, the UE selects an access sequence for the random access probe according to or based in part on the QoS information, and the base station according to the random access probe from the UE The sequence is obtained, and QoS information corresponding to the access sequence is obtained.
  • the UE can quickly transmit the QoS information of the call to the network side, so that the network side can use a more reasonable access control mechanism and an access mechanism.
  • FIG. 1 is a schematic diagram of random access conflicts between different UEs at the same time according to the prior art
  • FIG. 2 is a flowchart of a random access method in a mobile communication system according to a first embodiment of the present invention
  • FIG. 3 is a flowchart according to the present invention.
  • the embodiment of the present invention may pre-group the access sequence that can be used for the random access probe, establish the access, the correspondence between the sequence group and the QoS information, and save the corresponding relationship on the UE side and the network side respectively.
  • the UE When responding to the paging and/or actively initiating the call, the UE randomly selects one access sequence from the corresponding access sequence group according to the QoS information for the random access probe, and the base station according to the random access from the UE
  • the access sequence in the probe finds the access sequence group to which the access sequence belongs, and uses the QoS information corresponding to the access sequence group as the QoS information corresponding to the access sequence, so as to quickly obtain the call.
  • QoS information is the access sequence group to which the access sequence belongs, and uses the QoS information corresponding to the access sequence group as the QoS information corresponding to the access sequence, so as to quickly obtain the call.
  • the UE when responding to paging and/or actively initiating a call, the UE selects an access sequence for the random access probe according to the QoS information and the forward channel quality.
  • the access sequence can be; an orthogonal code.
  • access sequences available for random access probes are grouped in advance based on QoS information and forward channel quality, each set of access sequences corresponding to a type of QoS information and forward channel quality.
  • the QoS information includes a user level and/or a service level, and the user level and/or the service level may be preset in the UE.
  • the QoS information may be the user level and the service level.
  • the level of the service with the highest service level in the hybrid service may be used as the level of the initiated service; or, the services in the hybrid service are weighted according to their respective weights, and are weighted and calculated.
  • the rating is the level of the business that was initiated.
  • the UE may select a special set of access sequences according to the advance agreement.
  • the UE can determine that the service is an emergency call according to the alarm number input by the user, and then select a special access sequence with a higher service level according to the prior agreement.
  • the UE may not be able to know what service the calling party is to initiate, so the QoS information that can be used is the user level of the UE. That is: if the UE responding to the paging cannot obtain the QoS information of the calling party to initiate the service from the paging message (for example: the user level of the calling party cannot be obtained and The calling party initiates the service level of the service, and the access sequence can be selected according to the user level of the UE.
  • Table 4 shows an example in which the UE selects an access sequence for the random access probe according to the QoS information and the forward channel quality, and the access sequences are classified into three types according to the forward channel quality, and each type of access sequence is further based on
  • the grouping of the access sequence and the correspondence between the QoS information and the forward channel quality of each group of access sequences may be respectively implemented by the UE and the base station according to a preset algorithm; or, after being implemented by the base station, the UE is notified; or, after being implemented by the base station, The relevant parameters are passed to the UE, and the UE is implemented according to a preset algorithm. If the UE is notified by the base station, the base station may notify the UE by using a system message broadcast mode or a configured signaling mode, or a combination of the two.
  • the UE When the UE responds to the paging and/or initiates the call, the UE selects one access sequence group from the nine access sequence groups according to the QoS information and the forward channel quality, and then randomly selects one from the group. The incoming sequence is used for this random access probe. Since the QoS information and the forward channel quality of each UE may exhibit a certain uniform distribution feature, if the UE responds to the paging and/or initiates the call, it is selected according to the QoS information and the forward channel quality for random connection. The access sequence of the probe can be effectively used to avoid random access conflicts.
  • the UE sends a random access probe to the network side.
  • the base station on the network side detects an access sequence in the random access probe from the UE.
  • the base station on the network side obtains the QoS information of the call.
  • the base station searches for the access by using the stored access sequence of each group of access sequences and the QoS information and the forward channel quality according to the detected access sequence in the random access probe from the UE.
  • the access sequence group to which the sequence belongs, the QoS information and the forward channel quality corresponding to the access sequence group are used as the QoS information and the forward channel quality corresponding to the access sequence, thereby obtaining the QoS information of the call and the Forward channel quality of the UE.
  • the base station on the network side rejects or accepts access of the UE according to the QoS information and the forward channel quality of the UE.
  • the UE quickly transmits the QoS information of the call to the network side through the sent random access probe, and the QoS information includes the user level and/or the service level, so that the network side can use more reasonable access. Control mechanisms and access mechanisms to allocate access resources more reasonably.
  • the network side can pre-set the QoS function switch, and notify the UE of the status of the function switch by means of configuration negotiation signaling or system message broadcast. If the UE knows that the QoS function switch is in the on state, the QoS information and the forward channel quality are randomly connected; the probe selects the access sequence; otherwise, the random access probe selection according to the QoS information and the forward channel quality is prohibited. Access sequence.
  • the base station can quickly accept or reject the service by using the QoS information and the forward channel quality information implied by the access sequence selected by the UE, so that the network side can allocate the access resources more reasonably.
  • the second embodiment of the present invention is substantially the same as the first embodiment in the mobile communication system, except that in the first embodiment, the UE is a random access probe based on the QoS information and the forward channel quality.
  • the pin selects an access sequence, and in the present embodiment, the UE selects an access sequence for the random access probe based on the QoS information, the forward channel quality, and the request level.
  • the access sequence may be an orthogonal code.
  • step 310 the UE selects an access sequence for the random access probe according to the QoS information, the forward channel quality, and the request level when responding to the paging and/or actively initiating the call.
  • the access sequences available for the random access probes are grouped in advance according to the QoS information, the forward channel quality, and the request level corresponding to the number of data buffers, and each group of access sequences corresponds to one type of QoS information. , forward channel quality and request level.
  • QoS information includes user level And/or a service level
  • the user level and/or service level may be preset in the UE. If the UE initiates paging and the UE knows the service to be initiated, the QoS information may be a user level and a service level.
  • the initiated service is a hybrid service
  • the level of the service with the highest service level in the hybrid service may be used as the level of the initiated service; or, the services in the hybrid service are weighted according to their respective weights.
  • the level calculated by weighting is used as the level of the initiated business.
  • the UE may select a special set of access sequences according to the advance agreement. For example, the UE can determine that the service is an emergency call according to the alarm number input by the user, and then select a special group of access sequences with higher service levels according to the advance agreement.
  • the UE may not be able to know what service the calling party wants to initiate, so
  • the QoS information used is the UE user level. That is, if the UE responding to the paging cannot obtain the QoS information of the calling party to initiate the service from the paging message (for example, the user level of the calling party and the service level of the calling party originating service cannot be obtained), the UE may be The user level selects the access sequence.
  • Table 5 shows an example of the UE selecting an access sequence for the random access probe according to the QoS information, the forward channel quality, and the request level.
  • the access sequence is classified into three types according to the forward channel quality, and each type of access sequence is
  • the correspondence between the group of the access sequence and the QoS information, the forward channel quality, and the request level of each group of access sequences may be respectively implemented by the UE and the base station according to a preset algorithm; or, after being implemented by the base station, the UE is notified; or, by the base station After the implementation, the relevant parameters are delivered to the UE, and the UE is implemented according to a preset algorithm.
  • the base station may notify the UE by using a system message broadcast manner or a configured signaling manner, or a combination of the two.
  • the QoS information includes a user level and/or a service level.
  • the UE When the UE responds to the paging and/or initiates the call, the UE selects one access sequence group from the 27 access sequence groups according to the QoS information, the forward channel quality, and the current data buffer number.
  • an access sequence is randomly selected from the group for the random access probe. Since the distribution of QoS information, forward channel quality, and current data buffer number of each UE may exhibit more uniform characteristics, if the UE responds to paging and/or initiates a call, according to QoS information, forward direction The channel quality and the current number of data buffers are used to select an access sequence for the random access probe, which further avoids the occurrence of random access collisions.
  • the UE sends a random access probe to the network side.
  • the base station on the network side detects an access sequence in the random access probe from the UE.
  • the base station on the network side obtains the QoS information of the call. Specifically, the base station searches for the correspondence between the stored access sequence and the QoS information, the forward channel quality, and the request level according to the detected access sequence in the random access probe from the UE. Obtaining an access sequence group to which the access sequence belongs, and using the QoS information, the forward channel quality, and the request level corresponding to the access sequence group as the QoS information, the forward channel quality, and the request corresponding to the access sequence. Level, thereby obtaining QoS information of the call, forward channel quality of the UE, and current data buffer number of the UE.
  • the base station on the network side rejects or accepts access of the UE according to the QoS information, the forward channel quality of the UE, and the current data buffer number of the UE.
  • the UE can quickly transmit the QoS information of the call to the network side by using the random access probe sent, and the QoS information includes the user level and/or the service level, so that the network side can use more reasonable access.
  • the control mechanism and the admission mechanism can comprehensively select the access resources according to the forward channel quality, the current number of data buffers, and the service priority and the user priority when the random access of the UE conflicts.
  • the network side can pre-set the QoS function switch, and notify the UE of the status of the function switch by means of configuration negotiation signaling or system message broadcast. If the UE learns that the QoS function switch is in the on state, the access sequence is selected for the random access probe according to the QoS information front, the channel quality, and the request level. Otherwise, the QoS information, the forward channel quality, and the request level are prohibited from being randomly.
  • the access probe selects an access sequence.
  • the base station can quickly accept or reject the service by the QoS information, the forward channel quality information, and the request level that are selected by the UE through the access sequence, so that the network side can allocate the access resources more reasonably.
  • the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer (readable) storage medium.
  • the storage medium is, for example, a ROM/RAM, a magnetic disk, an optical disk, or the like.
  • a mobile communication system includes a UE and a base station. Included in the UE: a unit for selecting an access sequence for a random access probe according to or based in part on QoS information, and a unit for transmitting a random access probe; and including, in the base station, a random connection for detecting a user equipment a unit of an access sequence in the probe; and a unit for obtaining QoS information corresponding to the detected access sequence.
  • the correspondence between the access sequence group and the QoS information is stored in advance.
  • an access sequence is randomly selected from the corresponding access sequence group according to or based in part on the QoS information for the random access probe. If the UE responding to the paging cannot obtain the QoS information of the calling party from the paging message (for example: the calling party cannot be obtained)
  • the user level and the service level of the calling party to initiate the service may select an access sequence according to the user level of the UE.
  • the base station can quickly accept or reject the service through the QoS information implied by the access sequence selected by the UE.
  • the base station searches for the access sequence group to which the access sequence belongs according to the access sequence in the random access probe from the UE, and uses the QoS information corresponding to the access sequence group as the QoS corresponding to the access sequence. Information, thereby obtaining QoS information for the call.
  • the network side can use a more reasonable access control mechanism and an access mechanism to allocate access resources more reasonably.
  • the user equipment is configured to send a random access probe, and the sequence of the random access probe is selected according to the quality of service information;
  • the base station is configured to receive the random access probe, according to The access sequence acquires the QoS information corresponding to the access sequence, and performs random access control on the user equipment according to the QoS information corresponding to the access sequence.
  • the embodiment of the present invention further provides a user equipment, including:
  • An access sequence selection unit configured to select an access sequence according to the quality of service information
  • a sending unit configured to send a random access probe, where the random access probe includes the selected access sequence.
  • the user equipment may further include: a determining unit, configured to receive a notification indicating that the quality of service information function is turned on, determine that the quality information function is enabled, and then notify the access sequence selection unit according to the quality of service information. Selecting an access sequence for the random access probe; otherwise, notifying the access
  • the sequence selection unit prohibits selecting an access sequence for the random access probe based on the quality of service information.
  • the embodiment of the invention also provides a base station, including:
  • a receiving detection unit configured to receive a random access probe from the user equipment, and obtain, according to the access sequence in the random access probe, quality of service information corresponding to the access sequence
  • an access control unit configured to perform random access control on the user device according to the quality of service information corresponding to the access sequence.
  • the base station further includes: a sending unit, configured to send, to the user equipment, a notification indicating that the quality of service information function is turned on.
  • the QoS information includes the user level and/or the service level, which ensures that when the random access of the UE conflicts, the network side can comprehensively process according to the user priority and the service priority. Access resources can be allocated more reasonably.
  • the network side can obtain the QoS information corresponding to the access sequence according to the access sequence in the random access probe from the UE. And forward channel quality. Moreover, since the QoS information and the forward channel of each UE have a certain uniform distribution feature, the random access conflict can be avoided.
  • the UE selects an access sequence for the random access probe according to the QoS information, the forward channel quality, and the request level corresponding to the number of data buffers, so that the network side can obtain the access sequence according to the random access probe from the UE.
  • the distribution of QoS information, forward channel quality, and current data buffer number of each UE exhibits a more uniform feature, it is possible to further avoid the occurrence of random access collision.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un système de communication mobile et un procédé d'accès aléatoire correspondant permettant à un dispositif utilisateur de transmettre rapidement des informations de qualité de service (QoS) concernant un appel au côté réseau. Lorsqu'un UE répond à un appel et/ou exécute un appel, l'UE sélectionne la séquence d'accès à une sonde d'accès aléatoire en fonction, en partie, des informations de qualité de service. La station de base obtient les informations de qualité de service correspondant à la séquence d'accès sur la base de la séquence d'accès dans la sonde d'accès aléatoire depuis l'UE. L'UE peut sélectionner la séquence d'accès pour la sonde d'accès aléatoire d'après les informations de qualité de service et de la qualité de la voie d'aller, et il peut également sélectionner ladite séquence d'accès en fonction des informations de qualité de service, de la qualité de la voie d'aller et du niveau de demande associé à la quantité de mémoire tampon.
PCT/CN2007/070528 2006-08-24 2007-08-21 Système de communication mobile, dispositif et procédé d'accès aléatoire WO2008025290A1 (fr)

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CN102264070B (zh) * 2010-05-25 2013-11-13 ***通信集团设计院有限公司 一种提供业务数据及执行访问业务的方法及设备
CN102724711B (zh) * 2011-03-31 2015-07-15 中国联合网络通信集团有限公司 物联网终端的接入方法、装置及物联网终端
CN102711216A (zh) * 2012-05-08 2012-10-03 中国联合网络通信集团有限公司 传输资源的选择方法及用户设备、确定方法及接入网设备
CN107295693B (zh) * 2016-04-13 2020-02-21 ***通信有限公司研究院 一种随机接入方法、基站和终端
CN108153685A (zh) * 2016-12-06 2018-06-12 阿里巴巴集团控股有限公司 一种处理请求的方法、装置及设备、可读介质
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