小区参数简要描述.docx

1、小区参数简要描述附录二 小区参数简要描述Add Cell Parametersadd_cell 4 6 0 0 0 29441 1021 13. wait_indication_parameters = 12 由于无可用信道，网络发送立即指配拒绝消息，其中包含了移台下次发出请求，必须等待的时间(T3122) 。（0255s）4. queue_management_information = 3 信道指配队列中移动台的个数（150） queue_management_information= max_q_length_full_rate_channel+ max_q_length_sdcch4.

2、 max_q_length_full_rate_channel = 3 指配全速率信道队列中移动台的个数（150）4. max_q_length_half_rate_channel = 0 指配半速率信道队列中移动台的个数（150）4. max_q_length_sdcch = 0 请求SDCCH的队列长度。3. channel_reconfiguration_switch = 0 TCH/SDCCH信道动态重新配置0-禁止/1-允许。8. channel_allocation_scheme = 0 Best to worst ch. allocationthreshold = 7 # of

3、times that CRM should attempt to assign a SCCP no. before rejecting the request3. max_number_of_sdcchs = 24 小区SDCCH的最大数目。（= the min_number_of sdcchs）。取值0 to 48如ccch_conf 1, 必须是8的倍数(如： 0, 8, 16,.48).如ccch_conf = 1, 必须是四的倍数(如： 0, 4, 12,.,44).3. sdcch_need_low_water_mark = 16 当空闲的SDCCH数目大于此值时，启动将SDCCH动

4、态配置成TCH，条件是SDCCH的数目必须大于number_sdcchs_preferred 3. sdcch_need_high_water_mark = 2 当空闲的SDCCH数目小于此值时，启动将TCH动态配置成SDCCH.3. number_sdcchs_preferred = 8 小于或等于max_number_of_sdcchs.同时小于或等于sdcch_need_low_water_mark.如ccch_conf 1, 必须是8的倍数(如： 0, 8, 16,.48).如ccch_conf = 1, 必须是四的倍数(如： 0, 4, 12,.,44).3. tch_full_ne

5、ed_low_water_mark = 4 SDCCH/TCH动态配置,必须保证的最小TCH数目.3. cell_bar_access_switch = 0 小区禁止接入开关,决定是否允许空闲模式下的移动台接入本小区 . 0 非禁止接入 1-禁止接入3. cell_bar_access_class = 0 禁止接入的移动台类别 en_incom_ho = 1 0 禁止切换入本小区1 允许切换入本小区ms_txpwr_max_cch = 5 在接入小区和收到第一次功率控制命令前,移动台的发射功率取1. ms_txpwr_max_cch .2.移动台的最大发射功率.二者之中的小值.推荐值:5(33

6、dbm)3. report_resource_tch_f_high_water_mark = 5当可用TCH小于该值时,启动内部资源指示计时器,并向MSC发送消息.=report_resource_tch_f_high_water_mark3. report_resource_tch_h_high_water_mark = 5 N/A3. report_resource_tch_h_low_water_mark = 1 N/A7. dtx_required = 0 0 Permitted (MS may use DTX) 手机连续发射请求1 Required (MS must use DTX)

7、2 Disallowed (MS must not use DTX) attach_detach = 1 移动台关机后是否存储LAC 1Enable/0disable 。3. ncc_of_plmn_allowed = 80h 允许的网络色码3. max_retran = 3 移动台发出信道请求的最大重发次数. RACH是一个ALOHA信道,网络允许移动台在收到立即指配消息前,发送多个信道请求,以提高接通率，但同时增加了RACH和SDCCH信道的负荷。取值范围03。 0 最大重发次数11 最大重发次数22 最大重发次数43 最大重发次数710.radio_link_timeout = 4 GS

8、M规范定义，移动台中有计时器S(T100)，在移动台通话开始时被赋予一个初值，即无线链路超时（radio_link_timeout）。BCCH上广播。每当移动台无法正确解码一个SACCH消息（4个SACCH BLOCK）时，S减1。每当移动台正确解码一个SACCH消息时，S加2。但S不会超过radio_link_timeout定义的初值。当S计数为零时，移动台放弃无线资源的连接，进入空闲模式。发生一次掉话。 取值范围： 0 15(4-64SACCH)3. tx_integer = 12 发送分布时隙数。为克服ALOHA方式的缺点，tx_integer 越大，RACH上发生碰撞的概率越小。但是同

9、时接续时间变长。取值范围： 0 to 15(From 3 to 50 RACH slots are used to spread the transmission.)Waiting period for the ch. request repeated transmit, random value in (S,S+1,.S+T-1)10.reestablish_allowed = 0 是否允许呼叫重建 0=enable10.cell_reselect_hysteresis = 4 在不同位置登记区的小区重选滞后（014dB）。 值过大， 移动台未能及时小区重选，人为造成小区的覆盖过大，移动台的

10、通话干扰大，增 加掉话的可能。过小，则造成在不同位置登记区边界处频繁的位置更新，增加SDCCH的负荷。3. rxlev_access_min = 5 移动台接入小区的最小电平值。建议该值小于15。电平值范围110到47dBm（如：105 =110+ rxlev_access_min） =-110+5 =-105dBm3. emergency_class_switch = 0 0=enable for all class, 1=only class 11-15 紧急情况时MS优先级开关。112，110。3. immediate_assign_mode = 0 0=assign SD only,

11、1=assign TCH as SD, for emergency call。 立即分配模式。10.handover_power_level = 5 移动台切换至目标小区的初始发射功率。 范围0 to 19(43-5dbm)pwrc = 1 This parameter determines whether the Broadcast Control Channels (BCCH) measurement will be included in the averaged value of hopping frequencies.0=include the BCCH as part of ave

12、rage value of hopping frequency6. rr_T3109 = 12000 This timer is used during the channel release procedure in case of a radio link timeout.When the timer expires, the CRM will send an RF channel release message to the RSS.The rr_t3109 parameter value must be set to a higher value than the CRM radio_

13、link_timeout parameter (T100). The reason for this is that the network should hold onto a channel that has lost radio link long enough for the MS to release it. This will ensure that the network will not put two MSs on the same dedicated channel.It is recommended that the practical range of values o

14、f rr_t3109 parameter be limited to 1.5 times that of the radio_link_timeout parameter value, that is four 96-SACCH blocks. The rr_t3109 parameter value must be greater than the rr_t3111 parameter value. Valid range 0 to 1000000(ms)Default value14400Link_fail exceeded, terminating resources when T310

15、9 expired5. rr_T3111 = 2000 This timer sets the amount of time allowed to delay the deactivation of a channel after the disconnection of the main signalling link. The purpose is to allow some time for the possible repetition of the disconnection of the main signalling link.This timer starts whenever

16、 the BTS attempts to configure a hopping timeslot. This timer stops when the procedure completes.The rr_t3111 timer will cause the BSS to wait before the channel in question is allocated another connection. The rr_t3111 parameter value must be set to a value equal to the value of T3110 (a timer in t

17、he MS that is hard coded by the MS manufacturer). Valid range 0 to 1000000ms Default value1500Start when DISC receipt and release resources until timer expired1. rr_T3212 = 20 Location update period Valid range 0 to 255(6min/step)Default value10dealloc_inact = 10000 This parameter sets the timer tha

18、t governs the deallocation of a channel for which a fatal error indication has been received from the BSS. The channel will be held for the time selected, in case the connection recovers.ho_ack = 10000 This parameter sets the amount of time that the system waits for confirmation that the MS has acce

19、ssed the handover channel. The timer should be set to allow the MS enough time to get onto a handover channel before clearing the original channel. This is a Motorola defined timer 0 to 1000000(ms)rf_chan_rel_ack = 10000 This parameter sets the amount of time that the system waits for an RF channel

20、release (acknowledgement) message from the Radio Subsystem (RSS). This is a Motorola defined timer. 0 to 1000000(ms)10.intra_cell_handover_allowed = 1 0=not performed by BSS0-Intra-cell handovers will not be performed by the BSS. These calls will be included as target cells in a Handover Required me

21、ssage to the MSC.1-The BSS will perform Intra-cell handovers. The MSC will be notified with a Handover Performed message.(由MSC通报)2-Intra-cell handovers are disabled and the Handover Required message is not sent to the MSC.10.inter_cell_handover_allowed = 1 1=performed by BSS, 2=not permitted0-Outgoi

22、ng internal and external handovers will not be performed by the BSS. The Handover Required message, including internal and external candidates, is sent to the MSC.Inter cell handovers are controlled by the MSC. （由MSC控制）1-Outgoing internal and external handovers are enabled. The MSC will be notified

23、with a Handover Performed message upon completion of an internal handover.Inter cell handovers are controlled by the BSC.2-Outgoing internal inter cell handovers are disabled. The Handover Required message is not sent to the MSC if an internal inter cell handover is required.3-Outgoing internal and

24、external inter cell handovers are disabled and the Handover Required message is not sent to the MSC.10.number_of_preferred_cells = 6 This parameter sets the maximum number of target cells to be included in a Handover Required message.The preferred list of target cells is a mandatory BSS field. The n

25、umber of preferred cells is given in order of predicted best performance. Valid range 1 to 16 handover_required_reject_switch = 1 Send the ho reject message from MSC to BSS This parameter disables or enables the delivery of a handover required reject message from the MSC to the source BSS in the eve

26、nt that a target cannot be found for a requested handover.This parameter only applies to the BSC (location = 0). If the handover_required_reject_switch is enabled (set to 1), the BSS expects to receive a handover required reject message from the switch. Any internal calls that are candidates for the

27、 handover will not be included in the Handover Required message. On receipt of the Handover Required Reject message the BSS will perform an internal handover if there are valid candidates. If the handover_required_reject_switch is disabled (set to 0), the BSS will not expect to receive a Handover Re

28、quired Reject message from the switch and will include internal candidates in the Ho Required message10.rr_T3103 = 4100 This parameter sets the time that the BSS waits for an internal handover to complete.The purpose is to keep the old channels long enough for the MS to retain the ability to return

29、to the old channels when necessary, and to release the channels if the call is dropped.The rr_t3103 wait period must have a longer duration than the combined times it takes for a handover command to be sent, plus the maximum time it takes to attempt to establish a data link with a multiframe mode. V

30、alid range 0 to 1000000ms Default value 5000msTime used to set up a call in a new ch. during ho, otherwise ho failure receipt when timer expired4. rr_T3101 = 2000 This parameter sets the time that the BSS waits for the Mobile Station (MS) to establish on a Standalone Dedicated Control Channel (SDCCH

31、) after sending an immediate assignment message. Valid range 0 to 1000000ms Default value 5000(add_cell default)Signalling establishment timerdecision_alg_num = 0 This parameter specifies the current power control algorithm Valid range 0 to 310-power control algorithm number 11-power control algorithm number 2 (enables the use of p_con_ack timers)2 to 31-reserved for future usedecision_1_dl_rxlev_av_h = 0 This parameter specifies the bin number containing the measurement averaging algorithm data used to make the han