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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
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PCT/CN2007/070528
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English (en)
French (fr)
Inventor
Quanzhong Gao
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication of WO2008025290A1 publication Critical patent/WO2008025290A1/zh
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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0866Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0866Non-scheduled access, e.g. ALOHA using a dedicated channel for access
    • H04W74/0875Non-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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Description

移动通信系统、 设备及其随机接入方法
本申请要求于 2006 年 8 月 24 日提交中国专利局、 申请号为 200610125951.7、 发明名称为"移动通信系统及其随机接入方法"的中国专利申 请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及移动通信领域, 特别涉及移动通信系统中的随机接入技术。 背景技术
随着移动通信技术的日益进步, 移动用户数量急剧增长, 给无线通信系统 带来了新的压力, 特别是对无线通信系统中的接入控制技术提出了更高的要 求。 接入控制技术是无线通信系统中实现对用户设备 ( User Equipment, 简称 "UE" )接入无线信道的一种控制方法。
下面对无线通信系统中的接入控制技术作一下简要说明。在无线通信系统 中, UE在每个相邻小区中移动时, 当进入某一个小区完成位置登记注册后, UE就驻留在该小区中, 并进入空闲状态, 该小区也就称为 UE的当前小区。 在空闲状态下, 如果 UE执行小区位置更新过程, 或者需要对小区来的寻呼进 行应答, 或者需要和其它用户建立呼叫, 包括业务请求、 发送短消息请求等, 则 UE会向当前小区基站发送接入请求。 需要说明的是, 随机接入过程由该 UE发起。 UE在随机接入信道上向小区基站发送接入请求, 进行接入试探。 当网络侧接收到 UE的接入请求后, 便在一个公共信道上给 UE回信道分配消 息, 然后 UE和基站在分配的特定信道上进行数据交互。还需要说明的是, UE 发起的随机接入过程是根据当前小区基站的接入资源 ,并按照特定的算法来完 成的。 UE在可用的接入资源中选择接入时隙, 这种选择是随机的, 然后基站 在收到 UE的接入试探后, 小区基站就发送一个接入指示消息给 UE, 表明当 前 UE是否接入成功。 如果随机接入不成功, 那么 UE则无法和当前小区进行 数据交互, 不能完成通话或者数据传输的功能。
在无线通信系统中, UE发起的随机接入有不同的原因, 主要分为两种: 响应寻呼和 UE完全始发的信息, 即如上所述的对小区来的寻呼进行应答, 和 与其它用户建立呼叫, 包括业务请求、 发送短消息请求等。 如果有两个或两个 以上的 UE同时发送接入信息, 空间接口的信号则会发生混淆, 将导致接收端 无法正确解调发送端信号, 这就成为随机接入的冲突。 由于随机接入的方式是 以探针的方式发起接入的过程,因此为了减小冲突可以对探针的内容用相互正 交的码组进行调制。 接入序列的生成方式有很多, 比如 Walsh序列、 Golay序 列等。 Walsh码是一组由 0、 1或 1、 -1组成的码序列, 长度为 2的 n次方。 一
; 旦 Walsh码的维度确定,所有的 Walsh码的组合即确定。比如 1024维的 Walsh 码共有 1024种不同的码序列, 每个序列的长度也为 1024位, 可称为 1024个 码空间, 每两个码序列之间都正交。
虽然不同 UE的随机接入用不同的接入序列调制,使得即使同时传送随机 接入消息也能被接收端正确接收, 但是, 如果不同的 UE同时釆用同样的接入
) 序列调制, 则也将造成相互干扰, 使接收端无法解出有用信息。 根据 UE发起 随机接入的不同原因,可将不同的 UE同时釆用同样的接入序列调制造成的冲 突分为响应寻呼的 UE之间的冲突、 响应寻呼 UE与始发 UE之间的冲突、 始 发 UE之间的冲突。 因此, 为了提高随机接入的性能则需尽量避免 UE在同一 发送时刻选用同样的接入序列。
; 目前, 在国际电气电子工程师协会 ( Institute of Electrical and Electronics
Engineers, 简称' ΊΕΕΕ" ) 802.20的随机接入中, 使用了 1024维的 Walsh码对 接入探针的内容进行调制。 1024个码空间的索引号为 0 - 1023 , 其中索引号为 0 - 17的预留给了激活集作切换、功率控制和时间校正用。 索引号为 18 - 1023 (共 1006个) 的留给 UE发接入探针时用。 发送的接入探针包括响应寻呼和
) UE发起始呼叫等原因值的探针。
其中, UE可使用的 Walsh码被分为 9个组, 如表 1 所示, 其中每一行 partitionNsize (分组大小) 的 1到 9序号列对应与这九个组包含的接入序列信 息,其中 SI、 S2和 S3的值的定义如表 2所示,其中的 fl00r( NACMPNumSequence/18 ) 是对常数 NACMPNumSeqw除以 18然后向下取整数。常数 NACMPNumSeqw由协议
; 定义, 一般是 1024。 每个组的数量由 Sl、 S2和 S3定义, 具体对应的接入序 列的索引则由另外的算法生成, 可以是顺序排列, 也可以是其他的排列算法。 现有技术中是顺序排列。 每个 UE在接入和被寻呼后发送寻呼响应时, 根据自 身的信道质量和请求等级从 9个组中选择一个组, 如表 3所示, 然后再从该组 中随机选择一个接入序列用于本次随机接入探针, 其中,请求等级一般对应于
Figure imgf000005_0001
分 列成接组入 请求等级
前向信道盾量
1 2 3
1 1 2 3
2 4 5 6
3 7 8 9 表 3
现有技术中提供了多种分组方法供选择以适应不同的场景,表 1中的每一 行都是一种分配方法, 在一个小区内一般从中选择一种(即一行)作为九个组 ; 的分配方式。
在实际应用中,发明人发现存在以下问题: 网络侧无法更合理地利用接入 资源, 不能根据业务优先级和用户优先级进行准入和优先级处理。
造成这种情况的主要原因在于, 在现有技术中, 所有要发起随机接入的 UE都根据自身的信道质量和请求等级来选择某一个接入序列, 因此难以避免
) UE在响应寻呼或发起呼叫时和其它 UE在发起呼叫时选择相同的接入序列而 发生冲突的情况; 也难以避免 UE在响应寻呼或发起呼叫时和其它 UE在响应 寻呼时选择相同的接入序列而发生冲突的情况,如图 1所示。 当发生冲突情况 时, 由于网络侧无法快速获知发起随机接入的 UE的业务等级或用户等级, 因 而无法根据业务优先级和用户优先级进行准入和优先级处理。
; 发明内容
本发明实施例一方面在于提供一种移动通信系统及其随机接入方法,使得 用户设备可以快速地将呼叫的服务质量(Quality of Service, 简称" QoS" )信息 传递到网络侧。
本发明实施例另一方面在于提供一种移动通信系统中的设备。
) 本发明实施例技术方案包括:
一种移动通信系统中随机接入方法, 包含以下步骤:
接收用户设备发送的随机接入探针,所述随机接入探针的接入序列根据服 务质量信息选择; 根据所述接入序列获取与所述接入序列对应的服务质量信息;
根据与所述接入序列对应的服务质量信息对所述用户设备进行随机接入 控制。
一种移动通信系统, 包含用户设备和基站,
; 所述用户设备, 用于发送随机接入探针, 所述随机接入探针的接入序列根 据服务质量信息选择;
所述基站, 用于接收所述随机接入探针,根据所述接入序列获取与所述接 入序列对应的服务质量信息;根据与所述接入序列对应的服务质量信息对所述 用户设备进行随机接入控制。
) 一种用户设备, 包含:
接入序列选择单元, 用于根据服务质量信息选择接入序列;
发送单元, 用于发送随机接入探针, 所述随机接入探针中包含已选择的所 述接入序列。
一种基站, 包含:
; 接收检测单元, 用于接收来自用户设备的随机接入探针,根据所述随机接 入探针中的接入序列获取与所述接入序列对应的服务质量信息;
接入控制单元,用于根据与所述接入序列对应的服务质量信息对所述用户 设备进行随机接入控制。
通过比较可以发现, 本发明实施例的技术方案与现有技术的主要区别在
) 于, 当 UE在响应寻呼和 /或主动发起呼叫时, 该 UE根据或部分根据 QoS信 息为随机接入探针选择接入序列,基站根据来自该 UE的随机接入探针中的接 入序列, 获得与该接入序列对应的 QoS信息。 使得 UE可以快速地将呼叫的 QoS 信息传递到网络侧, 以便网络侧釆用更加合理的接入控制机制和准入机 制。 附图说明
图 1是根据现有技术中同一时刻不同 UE之间的随机接入冲突示意图; 图 2是根据本发明第一实施方式的移动通信系统中随机接入方法流程图; 图 3是根据本发明第二实施方式的移动通信系统中随机接入方法流程图。 具体实施方式
为使本发明的目的、技术方案和优点更加清楚, 下面将结合附图对本发明 作进一步地详细描述。
本发明实施例可以预先对可用于随机接入探针的接入序列分组,建立接入 ; 序列组与 QoS信息的对应关系, 并在 UE侧和网络侧分别保存该对应关系。
UE在响应寻呼和 /或主动发起呼叫时, 根据或部分根据 QoS信息从相应的接 入序列组中随机选择一个接入序列用于随机接入探针,基站根据来自该 UE的 随机接入探针中的接入序列, 查找得到该接入序列所属的接入序列组, 将该接 入序列组所对应的 QoS信息作为该接入序列所对应的 QoS信息, 从而快速获 ) 知该呼叫的 QoS信息。
下面才艮据该原理,对本发明的第一实施方式移动通信系统中随机接入方法 进行详细阐述。
如图 2所示, 在步骤 210中, UE在响应寻呼和 /或主动发起呼叫时, 根据 QoS信息和前向信道质量为随机接入探针选择接入序列。其中,接入序列可以 ; 是正交码。
具体地说, 预先根据 QoS信息和前向信道质量对可用于随机接入探针的 接入序列进行分组, 每一组接入序列对应于一种 QoS信息和前向信道质量。 其中, QoS信息包括用户等级和 /或业务等级, 该用户等级和 /或业务等级可以 预先设置在 UE中。
) 如果是主动发起寻呼, UE是知道要发起的业务的, 则 QoS信息可以为用 户等级和业务等级。 当发起的业务为混合业务时, 可将混合业务中业务等级最 高的业务的等级作为该发起的业务的等级; 或者,对混合业务中各项业务按照 各自的权重进行综合加权, 以加权计算得到的等级作为该发起的业务的等级。 当发起的业务是紧急呼叫时, UE可以根据提前约定选择一组特殊的接入序列。
; 比如说, UE根据用户输入的报警号码可以判定该业务为紧急呼叫, 则根据提 前约定选择一组特殊的业务等级较高的接入序列。
如果是响应寻呼, 则 UE可能无法知道主叫方要发起什么业务, 所以可以 釆用的 QoS信息是该 UE的用户等级。 即: 如果响应寻呼的 UE无法从寻呼消 息中获得主叫方发起业务的 QoS信息 (比如: 无法获得主叫方的用户等级和 主叫方发起业务的业务等级), 可根据该 UE的用户等级选择接入序列。
表 4为 UE根据 QoS信息和前向信道质量为随机接入探针选择接入序列的 示例, 根据前向信道质量将接入序列分为三类, 每一类接入序列进一步根据
QoS 信息分成三组, 因此, 所有可用于随机接入探针的接入序列一共分为了 ; 3*3 = 9组接入序列。 接入序列的分组以及每组接入序列与 QoS信息和前向信 道质量的对应关系, 可由 UE和基站根据预置的算法分别实现; 或者, 由基站 实现后通知 UE; 或者, 由基站实现后将相关参数传递到 UE, 该 UE根据预置 的算法实现。 如果是由基站实现后通知 UE, 则该基站可通过系统消息广播方 式或配置协商的信令方式, 或者两者的组合方式通知 UE。 并且, 需在 UE和 ) 网络侧中分别保存每组接入序列与 QoS信息和前向信道质量的对应关系。 在 本实施方式中, 为了便于说明, 将接入序列分为了 3*3 = 9组接入序列, 但在 实际应用中, 接入序列可分为 N*M组接入序列。
Figure imgf000009_0001
表 4
; 当 UE在响应寻呼和 /或主动发起呼叫时, 该 UE根据 QoS信息和前向信 道质量从 9个接入序列组中选择一个接入序列组,然后再从该组中随机选择一 个接入序列用于本次随机接入探针。由于各个 UE的 QoS信息和前向信道质量 会呈现一定的均勾分布特征,因此,如果 UE在响应寻呼和 /或主动发起呼叫时, 根据 QoS信息和前向信道质量来选择用于随机接入探针的接入序列, 可有效 ) 避免发生随机接入冲突的情况。
接着, 进入步骤 220, UE向网络侧发送随机接入探针。
接着, 进入步骤 230 , 网络侧的基站检测来自该 UE的随机接入探针中的 接入序列。 接着, 进入步骤 240 , 网络侧的基站获得该呼叫的 QoS信息。
具体地说, 基站根据检测到的来自该 UE的随机接入探针中的接入序列, 通过所保存的每组接入序列与 QoS信息和前向信道质量的对应关系, 查找得 到该接入序列所属的接入序列组, 将该接入序列组所对应的 QoS信息和前向 ; 信道质量作为该接入序列所对应的 QoS信息和前向信道质量, 从而得到该呼 叫的 QoS信息和该 UE的前向信道质量。
接着, 进入步骤 250, 网络侧的基站根据 QoS信息和该 UE的前向信道质 量拒绝或接受该 UE的接入。
由于 UE通过发送的随机接入探针快速地将呼叫的 QoS信息传递给了网络 ) 侧, 且该 QoS信息中包括了用户等级和 /或业务等级, 使得网络侧能够釆用更 加合理的接入控制机制和准入机制, 从而更加合理地分配接入资源。
值得一提的是, 网络侧可以预先设置 QoS的功能开关, 并将该功能开关 的状态通过配置协商信令方式或系统消息广播的方式通知给 UE。 如果 UE获 知 QoS的功能开关处于开启状态, 则根据 QoS信息和前向信道质量为随机接 ; 入探针选择接入序列; 否则, 禁止根据 QoS信息和前向信道质量为随机接入 探针选择接入序列。
在本实施例中 ,基站可以通过 UE选择的接入序列所隐含的 QoS信息和前 向信道质量信息快速接受或拒绝业务, 使网络侧可以更加合理地分配接入资 源。
) 本发明的第二实施方式移动通信系统中随机接入方法与第一实施方式大 致相同, 其区别仅在于, 在第一实施方式中, UE根据 QoS信息和前向信道质 量为随机接入探针选择接入序列, 而在本实施方式中, UE根据 QoS信息、 前 向信道质量和请求等级为随机接入探针选择接入序列。其中,接入序列可以是 正交码。
; 具体如图 3所示, 在步骤 310中, UE在响应寻呼和 /或主动发起呼叫时, 根据 QoS信息、 前向信道质量、 和请求等级为随机接入探针选择接入序列。
具体地说, 预先根据 QoS信息、 前向信道质量、 和对应于数据緩存数量 的请求等级对可用于随机接入探针的接入序列进行分组,每一组接入序列对应 于一种 QoS信息、 前向信道质量和请求等级。 其中, QoS信息包括用户等级 和 /或业务等级, 该用户等级和 /或业务等级可以预先设置在 UE中。 如果是主 动发起寻呼, UE是知道要发起的业务的, 则 QoS信息可以为用户等级和业务 等级。 当发起的业务为混合业务时, 可将混合业务中业务等级最高的业务的等 级作为该发起的业务的等级; 或者,对混合业务中各项业务按照各自的权重进
; 行综合加权, 以加权计算得到的等级作为该发起的业务的等级。 当发起的业务 是紧急呼叫时, UE可以根据提前约定选择一组特殊的接入序列。 比如说, UE 根据用户输入的报警号码可以判定该业务为紧急呼叫,则根据提前约定选择一 组特殊的所对应的业务等级较高的接入序列。
如果是响应寻呼, 则 UE可能无法知道主叫方要发起什么业务, 所以可以
) 釆用的 QoS信息是该 UE用户等级。 即: 如果响应寻呼的 UE无法从寻呼消息 中获得主叫方发起业务的 QoS信息 (比如: 无法获得主叫方的用户等级和主 叫方发起业务的业务等级), 则可根据该 UE的用户等级选择接入序列。
表 5为 UE根据 QoS信息、前向信道质量和请求等级为随机接入探针选择 接入序列的示例,根据前向信道质量将接入序列分为三类,每一类接入序列进
; 一步根据请求等级分成三小类, 在每一小类中再根据 QoS信息分成三组, 因 此, 所有可用于随机接入探针的接入序列一共分为了 3*3*3 = 27组接入序列。 接入序列的分组和每组接入序列与 QoS信息、 前向信道质量和请求等级的对 应关系可由 UE 和基站根据预置的算法分别实现; 或者, 由基站实现后通知 UE; 或者, 由基站实现后将相关参数传递到 UE,该 UE根据预置的算法实现。
) 如果是由基站实现后通知 UE, 则该基站可通过系统消息广播方式或配置协商 的信令方式, 或者两者的组合方式通知 UE。 并且, 需在 UE和网络侧中分别 保存每组接入序列与 QoS信息、 前向信道质量和请求等级的对应关系。 其中, QoS信息包括用户等级和 /或业务等级。 本实施方式中, 为了便于说明, 将接 入序列分为了 3*3*3 = 27 组接入序列, 但在实际应用中, 接入序列可分为
; N*M*L组接入序列。 QoS信息
前向信道质量 ι- 等级 1 2 3
1 1 2 3
1 2 4 5 6
3 7 8 9
1 10 1 1 12
2 2 13 14 15
3 16 17 18
1 19 20 21
1 2 22 23 24
3 25 26 27 表 5
当 UE在响应寻呼和 /或主动发起呼叫时, 该 UE根据 QoS信息、 前向信 道质量和当前的数据緩存数量从 27个接入序列组中选择一个接入序列组, 然
; 后再从该组中随机选择一个接入序列用于本次随机接入探针。 由于各个 UE的 QoS信息、前向信道质量、和当前的数据緩存数量的分布会呈现出更加均匀的 特征, 因此, 如果 UE在响应寻呼和 /或主动发起呼叫时, 根据 QoS信息、 前 向信道质量和当前的数据緩存数量来选择用于随机接入探针的接入序列,能进 一步避免发生随机接入冲突的情况。
) 接着, 进入步骤 320, UE向网络侧发送随机接入探针。
接着, 进入步骤 330 , 网络侧的基站检测来自该 UE的随机接入探针中的 接入序列。
接着, 进入步骤 340, 网络侧的基站获得该呼叫的 QoS信息。 具体地说, 基站根据检测到的来自该 UE的随机接入探针中的接入序列,通过所保存的每 ; 组接入序列与 QoS信息、 前向信道质量和请求等级的对应关系, 查找得到该 接入序列所属的接入序列组, 将该接入序列组所对应的 QoS信息、 前向信道 质量和请求等级作为该接入序列所对应的 QoS信息、 前向信道质量和请求等 级,从而得到该呼叫的 QoS信息、该 UE的前向信道质量和该 UE当前的数据 緩存数量。
接着, 进入步骤 350, 网络侧的基站根据该 QoS信息、 该 UE的前向信道 质量和该 UE当前的数据緩存数量拒绝或接受该 UE的接入。
; 由于 UE通过发送的随机接入探针快速地将呼叫的 QoS信息传递给了网络 侧, 且该 QoS信息中包括了用户等级和 /或业务等级, 使得网络侧能够釆用更 加合理的接入控制机制和准入机制, 当 UE的随机接入发生冲突时, 能根据前 向信道质量、 当前的数据緩存数量以及业务优先级和用户优先级进行综合选 择, 从而更加合理地分配接入资源。
) 值得一提的是, 网络侧可以预先设置 QoS的功能开关, 并将该功能开关 的状态通过配置协商信令方式或系统消息广播的方式通知给 UE。 如果 UE获 知 QoS的功能开关处于开启状态, 则根据 QoS信息前、 向信道质量和请求等 级为随机接入探针选择接入序列, 否则, 禁止根据 QoS信息、 前向信道质量 和请求等级为随机接入探针选择接入序列。
; 在本实施例中,基站可以 UE选择的通过接入序列所隐含的 QoS信息、前 向信道质量信息和请求等级快速接受或拒绝业务,使网络侧可以更加合理地分 配接入资源。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤 是可以通过程序来指令相关的硬件来完成,所述的程序可以存储于一计算机可 ) 读取存储介质中, 该程序在执行时, 包括上述方法的步骤; 所述的存储介质, 如: ROM/RAM、 磁碟、 光盘等。
本发明第三实施方式的移动通信系统中, 包含 UE和基站。在 UE中包含: 用于根据或部分根据 QoS信息为随机接入探针选择接入序列的单元和用于发 送随机接入探针的单元;在基站中包含用于检测来自用户设备的随机接入探针 ; 中的接入序列的单元和用于获得与检测到的接入序列对应的 QoS信息的单元。
具体地说,在 UE和基站中,预先保存接入序列组与 QoS信息的对应关系。 当 UE在响应寻呼和 /或主动发起呼叫时, 根据或部分根据 QoS信息从相应的 接入序列组中随机选择一个接入序列用于随机接入探针。 如果响应寻呼的 UE 无法从寻呼消息中获得主叫方发起业务的 QoS信息 (比如: 无法获得主叫方 的用户等级和主叫方发起业务的业务等级), 则可根据该 UE的用户等级选择 接入序列。
基站可以通过 UE选择的接入序列所隐含的 QoS信息快速接受或拒绝业 务。
; 基站根据来自 UE的随机接入探针中的接入序列,查找得到该接入序列所 属的接入序列组, 将该接入序列组所对应的 QoS信息作为该接入序列所对应 的 QoS信息, 从而得到该呼叫的 QoS信息。 使得网络侧能够釆用更加合理的 接入控制机制和准入机制, 从而更加合理地分配接入资源。
也就是说, 所述用户设备用于发送随机接入探针, 所述随机接入探针的接 ) 入序列根据服务质量信息选择; 所述基站用于接收所述随机接入探针,根据所 述接入序列获取与所述接入序列对应的服务质量信息;根据与所述接入序列对 应的服务质量信息对所述用户设备进行随机接入控制。
本发明实施例还同时提供了一种用户设备, 包含:
接入序列选择单元, 用于根据服务质量信息选择接入序列;
; 发送单元, 用于发送随机接入探针, 所述随机接入探针中包含已选择的所 述接入序列。
该用户设备还可以包括: 判别单元, 用于接收指示所述服务质量信息功能 开启状态的通知, 确定所述 Λ良务质量信息功能开启后,再通知所述接入序列选 择单元根据服务质量信息为随机接入探针选择接入序列; 否则,通知所述接入
) 序列选择单元禁止根据服务质量信息为随机接入探针选择接入序列。
本发明实施例还同时提供了一种基站, 包含:
接收检测单元, 用于接收来自用户设备的随机接入探针,根据所述随机接 入探针中的接入序列获取与所述接入序列对应的服务质量信息;
接入控制单元,用于根据与所述接入序列对应的服务质量信息对所述用户 ; 设备进行随机接入控制。
该基站还包括: 发送单元, 用于给用户设备发送指示服务质量信息功能开 启状态的通知。
本发明实施例中 QoS信息包括用户等级和 /或业务等级, 保证了在 UE的 随机接入发生冲突时, 网络侧能根据用户优先级和业务优先级综合处理,使得 接入资源能被更合理地分配。
如果 UE根据 QoS信息和前向信道质量为随机接入探针选择接入序列,使 得网络侧能根据来自 UE的随机接入探针中的接入序列,获得与该接入序列对 应的 QoS信息和前向信道质量。 而且, 由于各个 UE的 QoS信息和前向信道 ; 质量会呈现一定的均勾分布特征, 因此,也能较好的避免发生随机接入冲突的 情况。
如果 UE根据 QoS信息、前向信道质量和对应于数据緩存数量的请求等级 为随机接入探针选择接入序列,使得网络侧能根据来自 UE的随机接入探针中 的接入序列, 获得与该接入序列对应的 QoS信息、 前向信道质量和当前的数 ) 据緩存数量。 而且, 由于各个 UE的 QoS信息、 前向信道质量、 和当前的数据 緩存数量的分布会呈现出更加均匀的特征, 因此, 能进一步避免发生随机接入 冲突的情况。
虽然通过参照本发明的某些优选实施方式,已经对本发明进行了图示和描 述,但本领域的普通技术人员应该明白, 可以在形式上和细节上对其作各种改 ; 变, 而不偏离本发明的精神和范围。

Claims

权 利 要 求
1. 一种移动通信系统中随机接入方法, 其特征在于, 包含以下步骤: 接收用户设备发送的随机接入探针,所述随机接入探针的接入序列根据服 务质量信息选择;
; 根据所述接入序列获取与所述接入序列对应的服务质量信息;
根据与所述接入序列对应的服务质量信息对所述用户设备进行随机接入 控制。
2. 根据权利要求 1所述的移动通信系统中随机接入方法, 其特征在于, 所述服务质量信息包括用户等级和 /或业务等级。
)
3. 根据权利要求 2所述的移动通信系统中随机接入方法, 其特征在于, 所述服务质量信息中包括业务等级时, 如果所述业务是混合业务,将所述混合 业务中业务等级最高的业务的等级作为所述业务的等级; 或者,对所述混合业 务中各项业务按照各自的权重进行综合加权,以加权计算得到的等级作为所述 业务的等级。
4. 根据权利要求 1所述的移动通信系统中随机接入方法, 其特征在于, 预先对可用于随机接入探针的接入序列分组,建立接入序列组与服务质量信息 的对应关系;
所述随机接入探针的接入序列根据服务质量信息进行选择为:根据服务质 量信息从相应的接入序列组中随机选择一个接入序列用于所述随机接入探针; ) 根据所述接入序列, 获取与所述接入序列对应的服务质量信息为: 根据来 自用户设备的随机接入探针中的接入序列,查找得到该接入序列所属的接入序 列组,将该接入序列组所对应的服务质量信息作为该接入序列所对应的服务质 量信息。
5. 根据权利要求 4所述的移动通信系统中随机接入方法, 其特征在于, ; 根据服务质量信息与前向信道质量信息对接入序列进行分组。
6. 根据权利要求 4所述的移动通信系统中随机接入方法, 其特征在于, 根据服务质量信息、 前向信道质量信息和请求等级对接入序列进行分组。
7. 根据权利要求 4所述的移动通信系统中随机接入方法, 其特征在于, 所述对接入序列的分组和接入序列组与服务质量信息的对应关系的建立由用 户设备和基站根据预置的算法分别实现;
或者, 由基站实现后将分组信息和对应关系通知用户设备;
或者, 由基站实现后将相关参数传递到用户设备, 该用户设备根据预置的 算法实现。
8. 根据权利要求 7所述的移动通信系统中随机接入方法, 其特征在于, 所述基站实现接入序列的分组并生成接入序列组与服务质量信息的对应关系 后, 通知用户设备的方式包括:
通过系统消息广播方式或配置协商信令方式通知用户设备,或通过两者的 组合方式将所述分组信息和所述对应关系通知用户设备。
)
9. 根据权利要求 7或 8所述的移动通信系统中随机接入方法, 其特征在 于,如果作为响应寻呼的所述用户设备无法获得主叫方发起业务的服务质量信 息, 则根据该用户设备的用户等级选择接入序列。
10. 根据权利要求 1至 8中任一项所述的移动通信系统中随机接入方法, 其特征在于, 所述接入序列为正交码。
11、 根据权利要求 4所述的移动通信系统中随机接入方法, 其特征在于, 还包含以下步骤:
网络侧设置服务质量信息的功能开关,并将该功能开关的状态通过配置协 商信令方式或系统消息广播的方式通知所述用户设备;
如果所述用户设备获知所述服务质量信息的功能开关处于开启状态,则根 ) 据服务质量信息为随机接入探针选择接入序列, 否则, 禁止根据服务质量信息 为随机接入探针选择接入序列。
12. 一种移动通信系统, 包含用户设备和基站, 其特征在于,
所述用户设备, 用于发送随机接入探针, 所述随机接入探针的接入序列根 据服务质量信息选择;
; 所述基站, 用于接收所述随机接入探针,根据所述接入序列获取与所述接 入序列对应的服务质量信息;根据与所述接入序列对应的服务质量信息对所述 用户设备进行随机接入控制。
13. 根据权利要求 12所述的移动通信系统, 其特征在于, 所述服务质量 信息包括用户等级和 /或业务等级。
14. 根据权利要求 13所述的移动通信系统, 其特征在于,
所述用户设备,还用于作为响应寻呼的用户设备时,如果无法获得主叫方 发起业务的服务质量信息, 则根据该用户设备的用户等级选择接入序列。
15. 一种用户设备, 其特征在于, 包含:
; 接入序列选择单元, 用于根据服务质量信息选择接入序列;
发送单元, 用于发送随机接入探针, 所述随机接入探针中包含已选择的所 述接入序列。
16. 根据权利要求 15所述的用户设备, 其特征在于, 该用户设备还包括: 判别单元, 用于接收指示所述服务质量信息功能开启状态的通知,确定所
) 述服务质量信息功能开启后,再通知所述接入序列选择单元根据服务质量信息 为随机接入探针选择接入序列; 否则, 通知所述接入序列选择单元禁止根据服 务质量信息为随机接入探针选择接入序列。
17. 一种基站, 其特征在于, 包含:
接收检测单元, 用于接收来自用户设备的随机接入探针,根据所述随机接 ; 入探针中的接入序列获取与所述接入序列对应的服务质量信息;
接入控制单元,用于根据与所述接入序列对应的服务质量信息对所述用户 设备进行随机接入控制。
18. 根据权利要求 17所述的基站, 其特征在于, 该基站还包括: 发送单 元, 用于给用户设备发送指示服务质量信息功能开启状态的通知。
PCT/CN2007/070528 2006-08-24 2007-08-21 Système de communication mobile, dispositif et procédé d'accès aléatoire Ceased WO2008025290A1 (fr)

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