CN102149157B - System and method for cell reselection - Google Patents
System and method for cell reselection Download PDFInfo
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- CN102149157B CN102149157B CN201010114179.5A CN201010114179A CN102149157B CN 102149157 B CN102149157 B CN 102149157B CN 201010114179 A CN201010114179 A CN 201010114179A CN 102149157 B CN102149157 B CN 102149157B
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Abstract
The invention provides a system and method for cell reselection. In the method, user equipment (UE) measures adjacent cells; and if the cell which is measured to be provided with the strongest signal quality at a frequency point is a closed subscriber group (CSG) cell or a hybrid cell authorized by the UE, and if the cell with the strongest signal quality meets the condition that any one of Srxlev and Squal is more than 0, the UE reselects the cell with the strongest signal quality. The technical scheme in the invention is adopted to solve the technical problem that the authorized CSG cell or hybrid cell can not be reselected preferentially in the prior art.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of system and method for cell reselection.
Background technology
In mobile communcations system, switching and cell reselection are all extremely important parts, specifically, as subscriber equipment (User Equipment, UE) community is left when entering another one community, the signal of the original community (Serving cell) received by this equipment is more and more weak, and the cell signal entered received by it is more and more stronger.In order to keep the quality of equipment Received signal strength, this equipment must be transformed into the stronger base station (or community) of the signal that newly enters by original base station (or community).For the equipment of connected state, the conversion between this base station is called switching, and for the equipment of Idle state, the change of equipment persistent district is completed by cell reselection process, needs to detect Target cell, in satisfactory community, carry out cell reselection.
In modern wireless network system Construction, in-door covering has become the most important thing of networking, suitable in-door covering scheme can allow network farthest play its effect on the one hand, for operator creates larger value, also greatly can save the networking cost of operator on the other hand, really realize low input high repayment.Thus, the radio reception device that one is called Home eNodeB (Home NB) arises at the historic moment.Home eNodeB is deployed in the private site uses such as family, group, company or school as the dedicated resources of private user, various High-speed wireless access service can be provided to user and to provide on rate preferential, make up existing distributed cellular radio communication system simultaneously and cover not enough contradiction.
At present, Home eNodeB mainly contains three kinds of access modules: open, close with mixing.The Home eNodeB of open mode allows all user's accesses, and home base station cells is now exactly macrocell.The Home eNodeB of closed mode only allows the user's access through authorizing, as the user such as kinsfolk, member of community, these are called non-public authorized user group (Closed Subscriber Group through the user authorized, be called for short CSG, or claim closed user group), authorization message is stored in the usim card (UniversalSubscriber Identity Module, Subscriber Identity Module) of UE.The Home eNodeB of mixed mode allows all user's accesses, but enjoys preferential or preferential condition for the user belonging to this CSG user group.Be called macrocell relative to the community under macro base station (NodeB or eNodeB) covers, the community under the Home eNodeB covering of closed mode is called CSG cell, has CSG mark (ID, identity); Community under the Home eNodeB covering of mixed mode is called Hybrid (mixing) community, also has CSG mark.UE passes through the access module judging Home eNodeB belonging to CSG or Hybrid community and/or CSG list (CSG whitelist) information be stored in usim card, can judge whether certain CSG cell allows oneself to access.For a specific UE, the usual limited amount of the CSG cell allowing it to access, therefore UE can local information of preserving those CSG cell once accessed, be called fingerprint information (footprint information), by fingerprint information, UE can accurately and fast enter CSG or Hybrid community at cell reselection with when switching.
It is the reserved frequency resource of Home eNodeB that Home eNodeB can use operator specially, be called CSG dedicated frequency (dedicated carrier), also the frequency resource identical with macro base station can be used to be called hybrid frequency (mixed carrier), in same frequency, minizone is distinguished with physical layer identifications PCI (Physical LayerIdentity), when Home eNodeB and macro base station use same frequency, operator can be the Home eNodeB reserved PCI resource (PCI split) specially of closed mode, and CSG cell uses the PCI in PCI split.
There is the advantage on rate in CSG or Hybrid community due to authorized user (or Member Users), the load that normal cells is also called on macrocell also can alleviate greatly, so the UE authorized can reside on authorized CSG or Hybrid community as much as possible.UE initiates the search to CSG cell by the mode of artificial (manual searching) or automatic (autonomous searching).
The quality of UE Received signal strength leans on the measurement of UE to complete, in order to save the power consumption of equipment, the least possible go to reduce the community needing to measure, in modern wireless cellular system, when UE measures in the reuse adoption process of minizone, have a kind of strategy to be cell measurement strategy based on frequency priority.All frequencies, when subzone network is planned, are divided into several groups by operator, and every component joins a priority.The priority of the place frequency of oneself and the priority of place, neighbor cell frequency can be broadcasted in each community.For the gravity treatment of macrocell, UE observes common gravity treatment rule, and for the gravity treatment of CSG or Hybrid community, UE adopts special rule to implement cell reselection.
Gravity treatment rule for CSG or Hybrid community is:
If UE detects the suitable CSG cell on alien frequencies, when the sequence (rank) of this suitable CSG cell signal quality in the frequency of place is the highest, UE must the priority of gravity treatment (reselect) no matter current resident frequency to this CSG cell.For Hybrid community, only just this rule is adopted for authorized user, namely can regardless of the priority of current resident frequency.
For the suitable CSG cell on same frequency or Hybrid community, UE must observe common gravity treatment rule namely according to the ranking criteria of signal quality.
Described above according to signal quality ranking criteria: R is calculated for Serving cell
s=Q
meas, s+ Qhyst, calculates Rn=Q for neighbor cell
meas, n-Qoffset, wherein s represents Serving cell, and n represents neighbor cell, Q
meas, srepresent that UE records the performance number RSRP (Reference signal received power) of the reference signal of Serving cell, Q in reuse adoption process
meas, nbe that the performance number RSRP that UE records the reference signal of neighbor cell in reuse adoption process, Qhyst represent that Serving cell is sluggish, Qoffset is the deviant of neighbor cell, for homogeneous-frequency adjacent-domain, Serving cell Qoffset=Qoffset
s, n, for iso-frequency adjacent community Qoffset=Qoffset
s, n+ Qoffset
frequency, Qoffset
s, nthe skew of cell level, Qoffset
fequencyit is other skew of frequency level.All R values sort by UE, and namely what make number one is best cell, and UE gravity treatment is to best cell.Qhyst is broadcasted, Qoffset, Qoffset in the system message of Serving cell
frequency, obtain these parameters after UE read system message for cell reselection.
Suitable CSG cell described above refer to meet PLMN selection, do not access restriction (notbarred), signal quality meet community select standard and CSG be identified in the CSG list of UE.
To meeting the standard definition of community selection for must meet Srxlev > 0 and Squal > 0 simultaneously in existing protocol, wherein
Srxlev＝Q
rxlevmeas-(Q
rxlevmin+Q
rxlevminoffset)-Pcompensation，
S qual＝Q
qualmeas-(Q
qualmin+Q
qualminoffset)，
In LTE (Long Term Evolution) system, the Q in above formula
rxlevmeasfor UE records the performance number RSRP (Reference signal received power) of the reference signal of community, Q
qualmeasfor UE records the mass value RSRQ (Reference Signal Received Quality) of the reference signal of community; Q
rxlevminand Q
qualminbe respectively corresponding minimum value, these two parameters are broadcasted in the system message of Serving cell; Q
rxlevminoffsetand Q
qualminoffsetbe respectively corresponding side-play amount, and be only applied to the community in the PLMN of the UE assessment high priority resided in VPLMN; Pcompensation considers that (Maximum RF output power, uses P for the maximum transmission power of UE reality
powerClassrepresenting) (Maximum TX power level, uses P for the maximum transmission power that allows with community
eMAX_Hrepresent) factor of difference, Pcompensation=max (P
eMAX_H-P
powerClass, 0).
In UMTS FDD (universal mobile communications Frequency Division Duplexing (FDD)) system, calculate the Q in the formula of Srxlev and Squal
rxlevmeasfor UE records the RSCP (ReceivedSignal Code Power) of the Primary Common Pilot Channel of community, Q
qualmeasfor UE records the Ec/No (Thereceived energy per chip divided by the power density in the band) of the Primary Common Pilot Channel of community; Q
rxlevminand Q
qualminbe respectively corresponding minimum value, these two parameters are broadcasted in the system message of persistent district; Q
rxlevminoffsetand Q
qualminoffsetbe respectively corresponding side-play amount, and be only applied to the community in the PLMN of the UE assessment high priority resided in VPLMN, the definition of Pcompensation is consistent with the definition in LTE (Long Term Evolution).
Because CSG or Hybrid community is widely deployed in macrocell, for two different CSG or Hybrid communities in macrocell, as shown in Figure 1, the diverse location in macrocell 3 is deployed in CSG cell 1 frequently and community 2, community 1 is positioned at the central authorities of macrocell, community 2 is positioned at the edge (all adjacent macro cells all adopt this deployment way) of macrocell, the UE being arranged in community 3 assesses the parameter that community 1 and community 2 all adopt current service cell (community 3) to broadcast, because same frequency all adopts identical Q
rxlevminand Q
qualmintherefore UE adopts identical evaluate parameter when assessing community 1 and community 2, but due to be positioned at edge community 2 suffered by the interference of community 3 to be significantly less than interference suffered by community 1, UE can determine the Squal > 0 of community 2 at the edge of community 3, but probably can not record the Squal > 0 (institute is disturbed too large) of community 1 when UE entreats in cell 3, therefore UE can not re-selecting cell 1, even if UE is the authorized user of community 1.Adopt existing cell reselection criterion to make the UE authorized can not some CSG or Hybrid community of being disturbed of gravity treatment, this and UE need CSG or the Hybrid community of preferential resident mandate to be contradiction.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of system and method for cell reselection, solves in prior art the technical problem that preferentially cannot reselect to and authorize CSG or Hybrid community.
In order to solve the problem, the invention provides a kind of method of cell reselection, comprise: neighbor cell measured by subscriber equipment, the community that on a frequency, signal quality is the strongest if record is closed user group (CSG) community or mixing (Hybrid) community of described subscriber equipment mandate, and the strongest any one meeting in Srxlev and Squal of community of described signal quality is greater than 0, then described subscriber equipment gravity treatment is to the strongest community of this signal quality.
Further, if described frequency is the resident frequency of subscriber equipment, then described subscriber equipment gravity treatment also should meet before the strongest community of described signal quality: subscriber equipment exceedes Preset Time at current persistent district residence time, and the Rn value of the community that each described signal quality calculated is the strongest is all greater than the R of current persistent district within a certain period of time
svalue;
If described frequency is not the resident frequency of subscriber equipment, then described subscriber equipment gravity treatment also should meet before the strongest community of described signal quality: subscriber equipment exceedes Preset Time at current persistent district residence time.
Further, the CSG cell of described subscriber equipment mandate refers to that described CSG cell is in the white list of described subscriber equipment;
The Hybrid community of described subscriber equipment mandate refers to that described Hybrid community is in the white list of described subscriber equipment.
Further, described method is applicable to Long Term Evolution (LTE) system and universal mobile communications Frequency Division Duplexing (FDD) (UMTS FDD) system.
The present invention also provides a kind of method of cell reselection, comprising: for the CSG cell of subscriber equipment mandate and Hybrid community arrange special Q
qualminand/or Q
qualminoffset;
Neighbor cell measured by subscriber equipment, and when recording community that on a frequency, signal quality is the strongest and being CSG cell or the Hybrid community of described subscriber equipment mandate, the Q that community that described signal quality is the strongest is corresponding determined by subscriber equipment
qualminand/or Q
qualminoffsetif the community that described signal quality is the strongest meets Srxlev > 0 and Squal > 0, then described subscriber equipment gravity treatment is to the strongest community of this signal quality.
Further, the Q of CSG and Hybrid community is exclusively used in described in
qualminbe less than the Q of user equipment to reside in cell broadcast
qualminand/or described in be exclusively used in the Q of CSG and Hybrid community
qualminoffsetbe less than the Q of user equipment to reside in cell broadcast
qualminoffset.
Further, the path loss of described subscriber equipment institute persistent district is divided into L interval, the corresponding Q in each interval
qualminand/or Q
qualminoffset; Described L>=1;
The Q that community that described signal quality is the strongest is corresponding determined by subscriber equipment
qualminand/or Q
qualminoffsetmethod be, the Q of subscriber equipment signal quality Qiang community according to the place interval selection of institute's persistent district path loss
qualminand/or Q
qualminoffset.
Further, described special Q
qualminand/or Q
qualminoffsetarranged by predefined mode, or be issued to described subscriber equipment by system message.
Further, the Q of the interval correspondence that described path loss is larger
qualminand/or Q
qualminoffsetvalue larger;
The Q of the interval correspondence that path loss is maximum
qualminbe less than or equal to the Q of described persistent district broadcast
qualmin, and/or the Q of the maximum interval correspondence of path loss
qualminoffsetbe less than or equal to the Q of described persistent district broadcast
qualminoffset.
Further, if described frequency is the resident frequency of subscriber equipment, then described subscriber equipment gravity treatment also should meet before the strongest community of described signal quality: subscriber equipment exceedes Preset Time at current persistent district residence time, and the Rn value of the community that each described signal quality calculated is the strongest is all greater than the R of current persistent district within a certain period of time
svalue;
If described frequency is not the resident frequency of subscriber equipment, then described subscriber equipment gravity treatment also should meet before the strongest community of described signal quality: subscriber equipment exceedes Preset Time at current persistent district residence time.
Further, the CSG cell of described subscriber equipment mandate refers to that described CSG cell is in the white list of described subscriber equipment;
The Hybrid community of described subscriber equipment mandate refers to that described Hybrid community is in the white list of described subscriber equipment.
Further, described method is applicable to Long Term Evolution (LTE) system and universal mobile communications Frequency Division Duplexing (FDD) (UMTS FDD) system.
The present invention also provides a kind of system of cell reselection, comprises subscriber equipment; Described subscriber equipment, for measuring neighbor cell, also for recording closed user group (CSG) community or mixing (Hybrid) community that community that on a frequency, signal quality is the strongest is described subscriber equipment mandate, and described signal quality the strongest any one meeting in Srxlev and Squal of community is when being greater than 0, gravity treatment is to the strongest community of this signal quality.
Further, if described frequency is the resident frequency of subscriber equipment, described subscriber equipment also judges whether following condition for gravity treatment before the strongest community of described signal quality: whether subscriber equipment exceedes Preset Time at current persistent district residence time, and whether the Rn value of the community that each described signal quality calculated is the strongest is all greater than the R of current persistent district within a certain period of time
svalue, if meet, gravity treatment is to the strongest community of described signal quality;
If described frequency is not the resident frequency of subscriber equipment, described subscriber equipment also judges whether following condition for gravity treatment before the strongest community of described signal quality: whether subscriber equipment exceedes Preset Time at current persistent district residence time, if meet, gravity treatment is to the strongest community of described signal quality.
The present invention also provides a kind of system of cell reselection, comprises and arranges module and subscriber equipment;
Described module is set, for arranging special Q for the CSG cell of subscriber equipment mandate and Hybrid community
qualminand/or Q
qualminoffset;
Described subscriber equipment, for measuring neighbor cell, also for determining the Q that community that described signal quality is the strongest is corresponding when recording community that on a frequency, signal quality is the strongest and being CSG cell or the Hybrid community of described subscriber equipment mandate
qualminand/or Q
qualminoffset, and when the community that described signal quality is the strongest meets Srxlev > 0 and Squal > 0 gravity treatment to the strongest community of this signal quality.
Further, described system also comprises base station, and the described module that arranges is positioned at base station, will arrange the special Q of module installation during the sending system message of base station
qualminand/or Q
qualminoffsetbe sent to subscriber equipment; Or,
The described module that arranges is positioned at subscriber equipment, arranges module and adopts predefine mode to arrange described special Q
qualminand/or Q
qualminoffset.
Further, the Q of CSG and Hybrid community is exclusively used in described in
qualminbe less than the Q of user equipment to reside in cell broadcast
qualminand/or this is exclusively used in the Q of CSG and Hybrid community
qualminoffsetbe less than the Q of user equipment to reside in cell broadcast
qualminoffset.
Further, described CSG cell that module is subscriber equipment mandate is set and Hybrid community arranges special Q
qualminand/or Q
qualminoffsetrefer to, module is set and the path loss of described subscriber equipment institute persistent district is divided into L interval, the corresponding Q in each interval
qualminand/or Q
qualminoffset; Described L>=1;
The Q that community that described signal quality is the strongest is corresponding determined by described subscriber equipment
qualminand/or Q
qualminoffsetrefer to, the Q of subscriber equipment community that signal quality is the strongest according to the place interval selection of institute's persistent district path loss
qualminand/or Q
qualminoffset.
Further, described system also comprises base station, and the described module that arranges is positioned at base station, will arrange the Q of module installation during the sending system message of base station
qualminand/or Q
qualminoffsetbe sent to subscriber equipment; Or,
The described module that arranges is positioned at subscriber equipment, arranges module and adopts predefine mode to arrange described Q
qualminand/or Q
qualminoffset.
In sum, adopt technical scheme of the present invention, solving in prior art cannot preferentially to the problem of CSG or Hybrid cell reselection, and avoiding can not gravity treatment CSG or the Hybrid community of authorizing to some.Technical solutions according to the invention are applicable to LTE system and UMTS FDD system.
Accompanying drawing explanation
Fig. 1 is the schematic layout pattern of CSG cell in the present invention;
Fig. 2 is the flow chart of the inventive method embodiment one;
Fig. 3 is the flow chart of the inventive method embodiment two;
Fig. 4 is the flow chart of the inventive method embodiment three.
Embodiment
system embodiment
Embodiment one
The present embodiment provides a kind of system of cell reselection, comprises subscriber equipment;
Subscriber equipment, for measuring neighbor cell, also for recording closed user group (CSG) community or mixing (Hybrid) community that community that on a frequency, signal quality is the strongest is subscriber equipment mandate, and signal quality the strongest any one meeting in Srxlev and Squal of community is when being greater than 0, gravity treatment is to the strongest community of this signal quality.
Embodiment two
The present embodiment provides a kind of system of cell reselection, comprises and arranges module, subscriber equipment and base station;
Module is set, for arranging special Q for the CSG cell of subscriber equipment mandate and Hybrid community
qualminand/or Q
qualminlffset;
Subscriber equipment, for measuring neighbor cell, also for determining the Q that community that this signal quality is the strongest is corresponding when recording community that on a frequency, signal quality is the strongest and being CSG cell or the Hybrid community of subscriber equipment mandate
qualminand/or Q
qualminoffset, and when the community that this signal quality is the strongest meets Srxlev > 0 and Squal > 0 gravity treatment to the strongest community of this signal quality.
The above-mentioned module that arranges can be that the CSG cell of subscriber equipment mandate and Hybrid community arrange special Q by following two kinds of modes
qualminand/or Q
qualminoffset:
A CSG cell that () is subscriber equipment mandate and Hybrid community arrange the Q determined
qualminand/or Q
qualminoffset, be exclusively used in the Q of CSG and Hybrid community
qualminbe less than the Q of user equipment to reside in cell broadcast
qualminand/or this is exclusively used in the Q of CSG and Hybrid community
qualminoffsetbe less than the Q of user equipment to reside in cell broadcast
qualminoffset.
Module is set and is positioned at base station, during the sending system message of base station, will the special Q of module installation be set
qualminand/or Q
qualminoffsetbe sent to subscriber equipment; Or, module is set and is positioned at subscriber equipment, module is set and adopts predefine mode that described special Q is set
qualminand/or Q
qualminoffset.
The GSG community of mandate and the Q of Hybrid community is exclusively used in when what arrange
qualminand/or Q
qualminoffsetthan the Q of subscriber equipment institute persistent district broadcast
qualminand/or Q
qualminoffsettime large, subscriber equipment when calculating the CSG cell and the Squal of Hybrid community of authorizing from the Q of the CSG cell and Hybrid community that are exclusively used in mandate
qualminand/or Q
qualminoffsetand the Q of persistent district broadcast
qualminand/or Q
qualminoffsetin get smaller value and calculate.
B () arranges module and the path loss of subscriber equipment institute persistent district is divided into L interval, the corresponding Q in each interval
qualminand/or Q
qualminoffset; L>=1.
The Q that the community that subscriber equipment determination signal quality is the strongest is corresponding
qualminand/or Q
qualminoffsetrefer to, subscriber equipment is according to the Q of the strongest community of place this signal quality of interval selection of institute's persistent district path loss
qualminand/or Q
qualminoffset.
Each interval corresponding Q
qualminand/or Q
qualminoffsetarranged by predefined mode, or be issued to described subscriber equipment by system message.
The Q of the interval correspondence that path loss is larger
qualminand/or Q
qualminoffsetvalue larger; The Q of the interval correspondence that path loss is maximum
qualminbe less than or equal to the Q of described persistent district broadcast
qualmin, and/or the Q of the maximum interval correspondence of path loss
qualminoffsetbe less than or equal to the Q of described persistent district broadcast
qualminoffset.
When in each interval being the Q that CSG cell and Hybrid community are arranged
qualminand/or Q
qualminoffsetthan the Q of subscriber equipment institute persistent district broadcast
qualminand/or Q
qualminoffsettime large, subscriber equipment when calculating the CSG cell and the Squal of Hybrid community of authorizing from the Q for CSG cell and the setting of Hybrid community
qualminand/or Q
qualminoffsetthe Q broadcasted with persistent district
qualminand/or Q
qualminoffsetin get smaller value and calculate.
Module is set and is positioned at base station, during the sending system message of base station, will the Q of module installation be set
qualminand/or Q
qualminoffsetbe sent to subscriber equipment; Or,
Module is set and is positioned at subscriber equipment, module is set and adopts predefine mode that described Q is set
qualminand/or Q
qualminoffset.
Above in each embodiment,
If the frequency that subscriber equipment is measured is the resident frequency of subscriber equipment, subscriber equipment also judges whether following condition for gravity treatment before the strongest community of signal quality: whether subscriber equipment exceedes Preset Time at current persistent district residence time, and whether the Rn value of the community that each signal quality calculated is the strongest is all greater than the R of current persistent district within a certain period of time
svalue, if meet, gravity treatment is to the strongest community of signal quality; Certain hour is configured for institute persistent district and is issued by system message.
If the frequency that subscriber equipment is measured is not the resident frequency of subscriber equipment, subscriber equipment also judges whether following condition for gravity treatment before the strongest community of signal quality: whether subscriber equipment exceedes Preset Time at current persistent district residence time, if meet, gravity treatment is to the strongest community of signal quality.
embodiment of the method
Embodiment one
The present embodiment provides a kind of method of cell reselection, as shown in Figure 2, comprises the following steps:
Step 201:UE measures adjacent community, record on certain frequency and have n community (if this frequency is the frequency at place, UE current institute persistent district, then n community comprises persistent district), and wherein have i for CSG cell or Hybrid community, n > i > 0; Having one or more in this i CSG cell or Hybrid community is communities in UE whitelist.
The signal quality of step 202:UE to the community of the n on this frequency sorts, and namely calculates the R value of each community, for persistent district (or being called Serving cell), and R
s=Q
meas, s+ Qhyst, for neighbor cell, Rn=Q
meas, n-Qoffset; If ranking results is that the Rn value of a CSG (or Hybrid) community is maximum, and this CSG (or Hybrid) community is the community (namely this UE is the authorized user of this CSG or Hybrid community) in UE whitelist.
Step 203:UE judges that maximum any one whether meeting in Srxlev and Squal of CSG (or Hybrid) community of this Rn value is greater than 0, be perform step 204, otherwise UE resides in former Serving cell.
Step 204:UE gravity treatment is to maximum CSG (or Hybrid) community of this Rn value.
Above-mentioned steps 202 and 203 can reversed order, namely first judge whether to exist in this frequency the community that any one meeting in Srxlev and Squal is greater than 0, sorted by signal quality in each community meeting this condition again if exist, the community maximum if sorted is CSG or the Hybrid community (i.e. CSG or the Hybrid community of UE mandate) in UE whitelist, and UE needs gravity treatment to arrive this CSG or Hybrid community.
Embodiment two
The present embodiment provides a kind of method of cell reselection, for the CSG cell of subscriber equipment mandate and Hybrid community arrange special Q
qualminand/or Q
qualminoffset; Neighbor cell measured by subscriber equipment, and when recording community that on a frequency, signal quality is the strongest and being CSG cell or the Hybrid community of subscriber equipment mandate, the Q that community that this signal quality is the strongest is corresponding determined by subscriber equipment
qualminand/or Q
qualminoffsetif the community that this signal quality is the strongest meets Srxlev > 0 and Squal > 0, then subscriber equipment gravity treatment is to the strongest community of this signal quality.
For the CSG cell of subscriber equipment mandate and Hybrid community arrange special Q
qualminand/or Q
qualminoffsetcan be, but not limited to adopt following two kinds of modes:
Mode (a):
The Q being exclusively used in CSG and Hybrid community is set
qualminand/or Q
qualminoffset; The Q being exclusively used in CSG cell arranged
qualminwith the Q being exclusively used in Hybrid community
qualmincan be identical, also can be different, the Q being exclusively used in CSG cell of setting
qualminoffsetwith the Q being exclusively used in Hybrid community
qualminoffsetcan be identical, also can be different.
Preferably, this is exclusively used in the Q of CSG and Hybrid community
qualminthe Q of UE persistent district broadcast can be less than
qualminand/or this is exclusively used in the Q of CSG and Hybrid community
qualminoffsetthe Q of UE persistent district broadcast can be less than
qualminoffset.
The method of UE re-selecting cell as shown in Figure 3, comprises the following steps:
Step 301:UE measures adjacent community, record on certain frequency and have n community (if this frequency is the frequency at place, UE current institute persistent district, then n community comprises persistent district), and wherein have i for CSG cell or Hybrid community, n > i > 0; Having one or more in this i CSG cell or Hybrid community is communities in UE whitelist, i.e. the UE CSG cell of authorizing or Hybrid community.
Step 302:UE judges whether this n community exists and meets Srxlev > 0 and the community of Squal > 0, if existence meets Srxlev > 0 and the community of Squal > 0 (sets its number as m, n >=m), then perform step 303, otherwise UE does not consider that the community of this frequency is arrived in gravity treatment.
In this step, need to adopt the Q being exclusively used in CSG and Hybrid community when Squal being calculated for CSG or the Hybrid community in UE whitelist
qualminand/or Q
qualminoffset.
Step 303:UE, to this frequency meeting Srxlev > 0 and the signal quality of m the community of Squal > 0 sorts, namely calculates the R value of each community, for persistent district, and R
s=Q
meas, s+ Qhyst, for neighbor cell, Rn=Q
meas, n-Qoffset; If ranking results is that the Rn value of a CSG (or Hybrid) community is maximum, and this CSG (or Hybrid) community is the community in UE whitelist.
Step 304:UE gravity treatment is to maximum CSG (or Hybrid) community of this Rn value.
302 and 303 can reversed order in above-mentioned steps, namely first signal quality sequence is pressed to this frequency Shang Ge community, then judge whether the maximum community (community that namely signal quality is the strongest) of R value meets Srxlev and Squal and be all greater than 0, if the maximum community of this R value meets Srxlev and Squal and is all greater than 0, and be CSG or the Hybrid community (or CSG or the Hybrid community of authorizing) in UE whitelist, UE needs gravity treatment to arrive this CSG or Hybrid community.
In the present embodiment, be exclusively used in the Q of CSG and Hybrid community
qualminand/or Q
qualminoffsetcan be arranged by predefined mode, as arranged in the protocol, UE uses this value preset, and can also be issued to UE, carry as during the sending system message of persistent district, UE place the Q being exclusively used in CSG and Hybrid community by system message
qualminand/or Q
qualminoffset, or this UE is authorized CSG or Hybrid community sending system message time carry the Q being exclusively used in CSG and Hybrid community
qualminand/or Q
qualminoffset.
In mode (a), as the CSG cell being exclusively used in mandate of setting and the Q of Hybrid community
qualminand/or Q
qualminoffsetthan the Q of subscriber equipment institute persistent district broadcast
qualminand/or Q
qualminoffsettime large, subscriber equipment when calculating the CSG cell and the Squal of Hybrid community of authorizing from the Q of the CSG cell and Hybrid community that are exclusively used in mandate
qualminand/or Q
qualminoffsetand the Q of persistent district broadcast
qualminand/or Q
qualminoffsetin get smaller value and calculate.
Mode (b):
Be that CSG and Hybrid community arranges Q according to the path loss of persistent district
qualminand/or Q
qualminoffset, particularly, path loss is divided into L interval, the corresponding Q in each interval
qualminand/or Q
qualminoffset; In each interval, be the Q that CSG cell is arranged
qualminwith the Q arranged for Hybrid community
qualmincan be identical, also can be different, be the Q that CSG cell is arranged
qualminoffsetwith the Q arranged for Hybrid community
qualminoffsetcan be identical, also can be different.
Preferably, the Q of the interval correspondence that path loss is larger
qualminand/or Q
qualminoffsetvalue larger; The Q of the interval correspondence that path loss is maximum
qualminbe less than or equal to the Q of persistent district broadcast
qualminand/or the Q of the maximum interval correspondence of path loss
qualminoffsetbe less than or equal to the Q of persistent district broadcast
qualminoffset.
The method of UE re-selecting cell as shown in Figure 4, comprises the following steps:
Step 401:UE measures adjacent community, record on certain frequency and have n community (if this frequency is the frequency at place, UE current institute persistent district, then n community comprises persistent district), and wherein have i for CSG cell or Hybrid community, n > i > 0; Having one or more in this i CSG cell or Hybrid community is communities in UE whitelist, i.e. the UE CSG cell of authorizing or Hybrid community.
Step 402:UE judges whether this n community exists and meets Srxlev > 0 and the community of Squal > 0, if existence meets Srxlev > 0 and the community of Squal > 0 (sets its number as m, n >=m), then perform step 403, otherwise UE does not consider that the community of this frequency is arrived in gravity treatment.
In this step, CSG or the Hybrid community in UE whitelist is needed to adopt corresponding Q according to the path loss of persistent district
qualminand/or Q
qualminoffset.
Step 403:UE, to this frequency meeting Srxlev > 0 and the signal quality of m the community of Squal > 0 sorts, namely calculates the R value of each community, for persistent district, and R
s=Q
meas, s+ Qhyst, for neighbor cell, Rn=Q
meas, n-Qoffset; If ranking results is that the Rn value of a CSG (or Hybrid) community is maximum, and this CSG (or Hybrid) community is the community in UE whitelist.
Step 404:UE gravity treatment is to maximum CSG (or Hybrid) community of this Rn value.
402 and 403 can reversed order in above-mentioned steps, namely first signal quality sequence is pressed to this frequency Shang Ge community, then judge whether the maximum community (community that namely signal quality is the strongest) of R value meets Srxlev and Squal and be all greater than 0, if the maximum community of this R value meets Srxlev and Squal and is all greater than 0, and be CSG or the Hybrid community (or CSG or the Hybrid community of authorizing) in UE whitelist, UE needs gravity treatment to arrive this CSG or Hybrid community.
In mode (b), when in each interval being the Q that CSG cell and Hybrid community are arranged
qualminand/or Q
qualminoffsetthan the Q of subscriber equipment institute persistent district broadcast
qualminand/or Q
qualminoffsettime large, subscriber equipment when calculating the CSG cell and the Squal of Hybrid community of authorizing from the Q for CSG cell and the setting of Hybrid community
qualminand/or Q
qualminoffsetthe Q broadcasted with persistent district
qualminand/or Q
qualminoffsetin get smaller value and calculate.
Above in each embodiment, if the frequency that UE measures is the resident frequency of UE, then UE gravity treatment also should meet before the strongest community of signal quality: UE exceedes Preset Time (as 1s) at current persistent district residence time, and the Rn value of the community that each this signal quality calculated is the strongest is all greater than the R of current persistent district within a certain period of time
svalue.If the frequency that UE measures is not the resident frequency of UE, then UE gravity treatment also should meet before the strongest community of signal quality: UE exceedes Preset Time (as 1s) at current persistent district residence time.Certain hour is configured for institute persistent district and is issued by system message herein.
Technical solutions according to the invention are applicable to LTE system and UMTS FDD system.
Below by way of several application example, the present invention is described in further detail;
Application example one
UE resides in Cell_1, and the center frequency point of this community is f1, and this UE has CSG whitelist.Because UE is in movement, UE needs to measure adjacent community, UE records has Cell_2 with neighbor cell frequently, Cell_3 and Cell_4, according to the physical-layer cell identifier (physical cellidentity) of community, UE knows that Cell_2 is home base station cells and the CSG cell (broadcasting the PCI split for CSG cell in the system message of Cell_1) of closed mode, UE obtains its CSG ID by the system message reading Cell_2, finds that this CSG ID is in UE whitelist.UE detects CSG cell by automatic search, can not comprise adjacent CSG cell information in the system message of persistent district Cell_1.
Macrocell Cell_3 and Cell_4 meets Srxlev > 0 and Squal > 0, Cell_2 only meets Srxlev > 0, do not meet Squal > 0.Wherein
Srxlev＝Q
rxlevmeas-(Q
rxlevmin+Q
rxlevminoffset)-Pcompensation，
Squal＝Q
qualmeas-(Q
qualmin+Q
qualminoffset)，
In formula, Q
rxlevmeasthe performance number RSRP of the reference signal of community is recorded, Q for UE
qualmeasfor UE records the mass value RSRQ of the reference signal of community; Q
rxlevminand Q
qualminbe respectively corresponding minimum value, these two parameters are broadcasted in the system message of persistent district Cell_1.
According to the ranking criteria of co-frequency cell, UE knows that Cell_2 is community the strongest in frequency f 1, namely UE is according to the R of Cell_1
s=Q
meas, sthe Rn=Q of+Qhyst and each community
meas, n-Qoffset sequence show that Cell_2 is that (and the Rn of Cell_2 is greater than the R of Cell_1 to the maximum community of Rn value
s), wherein Q
meas, srepresent that UE records the performance number RSRP of the reference signal of persistent district Cell_1, Q in reuse adoption process
meas, nbe that the performance number RSRP that UE records the reference signal of neighbor cell in reuse adoption process, Qhyst represent that persistent district is sluggish, Qoffset is the deviant of neighbor cell.Now UE needs gravity treatment in Cell_2.
It should be noted that, before in UE gravity treatment to Cell_2, demand fulfillment resides in Cell_1 and exceedes Preset Time (as 1 second), and the Rn value of Cell_2 that (Treselection) repeatedly calculates within a certain period of time is greater than the R of Cell_1 always
svalue.
In the present embodiment, one of them meeting Srxlev and Squal because of CSG Cell_2 is greater than 0, and the Rn of the Cell_2 community that to be place frequency maximum, therefore UE gravity treatment is to Cell_2.
In the present embodiment, what UE measured is with community frequently, if the community of the alien frequencies that UE measures, as long as the CSG cell in UE whitelist is the community that this frequency is the strongest, and meeting Srxlev > 0 or Squal > 0, UE needs gravity treatment to arrive the priority of this CSG cell and no matter current resident frequency.If the CSG cell that UE records multiple mandates of alien frequencies (multiple frequency) is the community that place frequency is the strongest simultaneously, and meeting Srxlev > 0 or Squal > 0, UE needs gravity treatment to arrive one of them CSG cell.
In the present embodiment, Cell_2 is CSG cell, if Cell_2 is Hybrid community, as long as the CSG ID of this community is in the whitelist of UE, described method is applicable equally.
In the present embodiment, adjacent community all belongs to the PLMN of the PLMN of selection or the PLMN of registration or equivalence simultaneously, and neighbor cell is not barred, and adjacent community is (forbiddentracking areas for roaming) not in confined areas.The application scenarios of other embodiments is identical therewith, repeats no more.
Application example two
UE resides in Cell_1, and the center frequency point of this community is f1, and this UE has CSG whitelist.Because UE is in movement, UE needs to measure adjacent community, UE records has Cell_2 with neighbor cell frequently, Cell_3, Cell_4 and Cell_5, according to the physical-layer cell identifier (physical cellidentity) of community, UE knows that Cell_2 is home base station cells and the CSG cell (broadcasting the PCI split for CSG cell in the system message of Cell_1) of closed mode, UE obtains its CSG ID by the system message reading Cell_2, finds that this CSG ID is in UE whitelist.
In order to realize the present invention, in new system message, add the Q being exclusively used in CSG and Hybrid community
qualmin, this is exclusively used in the Q of CSG and Hybrid community
qualminthe Q that macrocell is corresponding can be less than
qualmin, according to the Q of this CSG or Hybrid community
qualminthe Cell_2 calculated meets Srxlev > 0 and Squal > 0, and macrocell Cell_3, Cell 4 and Cell_5 also meets Srxlev > 0 and Squal > 0.According to the ranking criteria of co-frequency cell, UE knows that Cell_2 is community the strongest in frequency f 1 further, namely UE is according to the R of Cell_1
s=Q
meas, sthe Rn=Q of+Qhyst and each community
meas, n-Qoffset sequence show that the Rn of Cell_2 is the maximum community of place frequency R value, and therefore UE needs gravity treatment in Cell_2.
It should be noted that, if Cell_2 is Hybrid community, as long as the CSG ID of this community is in the whitelist of UE, described method is applicable equally.
In existing agreement, the parameter of all cell reselections all derives from the resident persistent district of UE, for the target CS G or the Hybrid community that need gravity treatment, can adopt other method, the parameter that UE can broadcast in CSG or the Hybrid community of use authority, as Q
qualmin, this also can reach object of the present invention, makes the Squal > 0 of target CS G or Hybrid community.
Application example three
UE resides in Cell_1, and the center frequency point of this community is f1, and this UE has CSG whitelist.Because UE is in movement, UE needs to measure adjacent community, there is Cell_2 the neighbor cell that UE records on alien frequencies f2, Cell_3, Cell_4 and Cell_5, according to the physical-layer cell identifier (physicaleellidentity) of community, UE knows that Cell_2 is home base station cells and the CSG cell (UE can obtain PCI split according to community resident in the past) of closed mode, UE obtains its CSG ID by the system message reading Cell_2, finds that this CSG ID is in UE whitelist.
In order to realize the present invention, in new system message, add the Q being exclusively used in CSG and Hybrid community
qualmin(for frequency f 2), if Cell_2 meets Srxlev > 0 and Squal > 0.Macrocell Cell_3, Cell_4 and Cell_5 also meet Srxlev > 0 and Squal > 0.
According to the ranking criteria of co-frequency cell, UE knows that Cell_2 is community the strongest in frequency f 2, namely UE is according to the Rn=Q of each community
meas, n-Qoffset sequence show that Cell_2 is the strongest community, and now UE needs gravity treatment in Cell_2.
It should be noted that, in the present embodiment, be exclusively used in the Q of CSG and Hybrid community
qualminbroadcasted by system message, be exclusively used in the Q of CSG and Hybrid community
qualminalso can be configured by predefined mode, namely agreement specifies that UE adopts specific Q for CSG or the Hybrid community in the whitelist of UE
qualmin, UE adopts this particular value when calculating Squal.
In the present embodiment, UE have employed when calculating Squal the Q being exclusively used in CSG and Hybrid community
qualmin, also can expand Q
qualminoffset, make it have to be exclusively used in the Q of CSG and Hybrid community
qualminoffset(for authorized user), network or can adopt the mode of acquiescence to configure by this value of system information broadcast.
Application example four
UE resides in Cell_1, and the center frequency point of this community is f1, and this UE has CSG whitelist.Because UE is in movement, UE needs to measure adjacent community, UE records has Cell_2 with neighbor cell frequently, Cell_3, Cell_4 and Cell_5, according to the physical-layer cell identifier (physical cellidentity) of community, UE knows that Cell_2 is home base station cells and the CSG cell of closed mode, UE obtains its CSG ID by the system message reading Cell_2, finds that this CSG ID is in UE whitelist.
In the system message of persistent district, broadcast the transmitting power of persistent district, UE measures the RSRP value of persistent district can calculate path loss (Path Loss), and the transmitting power that path loss equals persistent district deducts the RSRP value of UE measurement.In the present embodiment, UE calculates the circuit loss value of Cell_1.
When circuit loss value is lower than (and/or equaling) a certain thresholding, the Squal that UE calculates Cell_2 adopts Q
qualmin1; During other situations, the Squal that UE calculates Cell_2 adopts Q
qualmin2.Described thresholding can be broadcasted by system message or adopt default behavior to configure; Q
qualmin1and Q
qualmin2also can be broadcasted by system message or adopt default behavior to configure.Especially, Q
qualmin1or Q
qualmin2(one of them) can get the Q calculated in Squal corresponding to macrocell
qualmin.
Now UE records the circuit loss value of Cell_1 lower than described thresholding, and the Squal that UE calculates Cell_2 adopts Q
qualminl, Cell_2 meets Srxlev > 0 and Squal > 0.Macrocell Cell_3, Cell_4 and Cell_5 also meet Srxlev > 0 and Squal > 0.
According to the ranking criteria of co-frequency cell, UE knows that Cell_ 2 is communities the strongest in frequency f 2, namely UE is according to the Rn=Q of each community
meas, n-Qoffset sequence show that Cell_2 is the strongest community, and now UE needs gravity treatment in Cell_2.
It should be noted that, for the Hybrid community of authorizing, described in the present embodiment, method is applicable equally.
In the present embodiment, UE selects different Q according to the circuit loss value of persistent district
qualmin, only have employed a thresholding for circuit loss value, also can adopt multiple thresholding, under the different value prerequisites of circuit loss value (intervals different), UE adopts different Q for CSG or the Hybrid community of authorizing
qualminand/or Q
qualminoffset.
For a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (19)
1. a method for cell reselection, comprising:
Neighbor cell measured by subscriber equipment, the community that on a frequency, signal quality is the strongest if record is closed user group CSG cell or the mixing Hybrid community of described subscriber equipment mandate, and the strongest community of described signal quality meets Squal is greater than 0, then described subscriber equipment gravity treatment is to the strongest community of this signal quality.
2. the method for claim 1, is characterized in that:
If described frequency is the resident frequency of subscriber equipment, then described subscriber equipment gravity treatment also should meet before the strongest community of described signal quality: subscriber equipment exceedes Preset Time at current persistent district residence time, and the Rn value of the community that each described signal quality calculated is the strongest is all greater than the R of current persistent district within a certain period of time
svalue;
If described frequency is not the resident frequency of subscriber equipment, then described subscriber equipment gravity treatment also should meet before the strongest community of described signal quality: subscriber equipment exceedes Preset Time at current persistent district residence time.
3. the method for claim 1, is characterized in that:
The CSG cell of described subscriber equipment mandate refers to that described CSG cell is in the white list of described subscriber equipment;
The Hybrid community of described subscriber equipment mandate refers to that described Hybrid community is in the white list of described subscriber equipment.
4. the method for claim 1, is characterized in that:
Described method is applicable to Long Term Evolution LTE system and universal mobile communications Frequency Division Duplexing (FDD) UMTSFDD system.
5. a method for cell reselection, comprising:
For the CSG cell of subscriber equipment mandate and Hybrid community arrange special Q
qualminand/or Q
qualminoffset;
Neighbor cell measured by subscriber equipment, and when recording community that on a frequency, signal quality is the strongest and being CSG cell or the Hybrid community of described subscriber equipment mandate, the Q that community that described signal quality is the strongest is corresponding determined by subscriber equipment
qualminand/or Q
qualminoffsetif the community that described signal quality is the strongest meets Srxlev > 0 and Squal > 0, then described subscriber equipment gravity treatment is to the strongest community of this signal quality.
6. method as claimed in claim 5, is characterized in that:
The described Q being exclusively used in CSG and Hybrid community
qualminbe less than the Q of user equipment to reside in cell broadcast
qualminand/or described in be exclusively used in the Q of CSG and Hybrid community
qualminoffsetbe less than the Q of user equipment to reside in cell broadcast
qualminoffset.
7. method as claimed in claim 5, is characterized in that, also comprise:
The path loss of described subscriber equipment institute persistent district is divided into L interval, the corresponding Q in each interval
qualminand/or Q
qualminoffset; Described L>=1;
The Q that community that described signal quality is the strongest is corresponding determined by subscriber equipment
qualminand/or Q
qualminoffsetmethod be, the Q of subscriber equipment signal quality Qiang community according to the place interval selection of institute's persistent district path loss
qualminand/or Q
qualminoffset.
8. the method as described in claim 5 or 7, is characterized in that:
Described special Q
qualminand/or Q
qualminoffsetarranged by predefined mode, or be issued to described subscriber equipment by system message.
9. method as claimed in claim 7, is characterized in that:
The Q of the interval correspondence that described path loss is larger
qualminand/or Q
qualminoffsetvalue larger;
The Q of the interval correspondence that path loss is maximum
qualminbe less than or equal to the Q of described persistent district broadcast
qualmin, and/or the Q of the maximum interval correspondence of path loss
qualminoffsetbe less than or equal to the Q of described persistent district broadcast
qualminoffset.
10. method as claimed in claim 5, is characterized in that:
If described frequency is the resident frequency of subscriber equipment, then described subscriber equipment gravity treatment also should meet before the strongest community of described signal quality: subscriber equipment exceedes Preset Time at current persistent district residence time, and the Rn value of the community that each described signal quality calculated is the strongest is all greater than the R of current persistent district within a certain period of time
svalue;
If described frequency is not the resident frequency of subscriber equipment, then described subscriber equipment gravity treatment also should meet before the strongest community of described signal quality: subscriber equipment exceedes Preset Time at current persistent district residence time.
11. methods as claimed in claim 5, is characterized in that:
The CSG cell of described subscriber equipment mandate refers to that described CSG cell is in the white list of described subscriber equipment;
The Hybrid community of described subscriber equipment mandate refers to that described Hybrid community is in the white list of described subscriber equipment.
12. methods as claimed in claim 5, is characterized in that:
Described method is applicable to Long Term Evolution LTE system and universal mobile communications Frequency Division Duplexing (FDD) UMTSFDD system.
The system of 13. 1 kinds of cell reselections, comprises subscriber equipment; It is characterized in that:
Described subscriber equipment, for measuring neighbor cell, also be the closed user group CSG cell of described subscriber equipment mandate for recording the community that on a frequency, signal quality is the strongest or mix Hybrid community, and the strongest community of described signal quality meets Squal when being greater than 0, gravity treatment is to the strongest community of this signal quality.
14. systems as claimed in claim 13, is characterized in that:
If described frequency is the resident frequency of subscriber equipment, described subscriber equipment also judges whether following condition for gravity treatment before the strongest community of described signal quality: whether subscriber equipment exceedes Preset Time at current persistent district residence time, and whether the Rn value of the community that each described signal quality calculated is the strongest is all greater than the R of current persistent district within a certain period of time
svalue, if meet, gravity treatment is to the strongest community of described signal quality;
If described frequency is not the resident frequency of subscriber equipment, described subscriber equipment also judges whether following condition for gravity treatment before the strongest community of described signal quality: whether subscriber equipment exceedes Preset Time at current persistent district residence time, if meet, gravity treatment is to the strongest community of described signal quality.
The system of 15. 1 kinds of cell reselections, comprises and arranges module and subscriber equipment; It is characterized in that:
Described module is set, for arranging special Q for the CSG cell of subscriber equipment mandate and Hybrid community
qualminand/or Q
qualminoffset;
Described subscriber equipment, for measuring neighbor cell, also for determining the Q that community that described signal quality is the strongest is corresponding when recording community that on a frequency, signal quality is the strongest and being CSG cell or the Hybrid community of described subscriber equipment mandate
qualminand/or Q
qualminoffset, and when the community that described signal quality is the strongest meets Srxlev > 0 and Squal > 0 gravity treatment to the strongest community of this signal quality.
16. systems as claimed in claim 15, is characterized in that:
Described system also comprises base station, and the described module that arranges is positioned at base station, will arrange the special Q of module installation during the sending system message of base station
qualminand/or Q
qualminoffsetbe sent to subscriber equipment; Or,
The described module that arranges is positioned at subscriber equipment, arranges module and adopts predefine mode to arrange described special Q
qualminand/or Q
qualminoffset.
17. systems as claimed in claim 15, is characterized in that:
The described Q being exclusively used in CSG and Hybrid community
qualminbe less than the Q of user equipment to reside in cell broadcast
qualminand/or this is exclusively used in the Q of CSG and Hybrid community
qualminoffsetbe less than the Q of user equipment to reside in cell broadcast
qualminoffset.
18. systems as claimed in claim 15, is characterized in that:
Described CSG cell that module is subscriber equipment mandate is set and Hybrid community arranges special Q
qualminand/or Q
qualminoffsetrefer to, module is set and the path loss of described subscriber equipment institute persistent district is divided into L interval, the corresponding Q in each interval
qualminand/or Q
qualminoffset; Described L>=1;
The Q that community that described signal quality is the strongest is corresponding determined by described subscriber equipment
qualminand/or Q
qualminoffsetrefer to, the Q of subscriber equipment community that signal quality is the strongest according to the place interval selection of institute's persistent district path loss
qualminand/or Q
qualminoffset.
19. systems as claimed in claim 18, is characterized in that:
Described system also comprises base station, and the described module that arranges is positioned at base station, will arrange the Q of module installation during the sending system message of base station
qualminand/or Q
qualminoffsetbe sent to subscriber equipment; Or,
The described module that arranges is positioned at subscriber equipment, arranges module and adopts predefine mode to arrange described Q
qualminand/or Q
qualminoffset.
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| CN106162782A (en) * | 2015-03-30 | 2016-11-23 | 中国移动通信集团公司 | System of selection, device and the terminal of a kind of voice fallback Target cell |
| US10736010B2 (en) * | 2016-10-07 | 2020-08-04 | Qualcomm Incorporated | Reference beam for event trigger in mobility management |
| CN111669790A (en) * | 2019-03-08 | 2020-09-15 | 中国移动通信有限公司研究院 | Cell reselection or redirection method, device, network side equipment and terminal |
| CN111065072B (en) * | 2019-11-21 | 2022-04-08 | 新奇点智能科技集团有限公司 | Method and device for selecting and reselecting RSU (radio service Unit) by OBU (on-board unit), electronic equipment and storage medium |
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