diff --git a/src/core/libraries/error_codes.h b/src/core/libraries/error_codes.h
index fe1e7e05..9ad64fdd 100644
--- a/src/core/libraries/error_codes.h
+++ b/src/core/libraries/error_codes.h
@@ -462,4 +462,5 @@ constexpr int ORBIS_ULT_ERROR_STATE = 0x80810006;
 constexpr int ORBIS_ULT_ERROR_NULL = 0x80810001;
 constexpr int ORBIS_ULT_ERROR_ALIGNMENT = 0x80810002;
 constexpr int ORBIS_ULT_ERROR_INVALID = 0x80810004;
-constexpr int ORBIS_ULT_ERROR_NOT_INITIALIZE = 0x8081000A;
\ No newline at end of file
+constexpr int ORBIS_ULT_ERROR_NOT_INITIALIZE = 0x8081000A;
+constexpr int ORBIS_ULT_ERROR_PERMISSION = 0x80810005;
\ No newline at end of file
diff --git a/src/core/libraries/ult/ult.cpp b/src/core/libraries/ult/ult.cpp
index 5df8631e..0219b7c0 100644
--- a/src/core/libraries/ult/ult.cpp
+++ b/src/core/libraries/ult/ult.cpp
@@ -57,11 +57,10 @@ int PS4_SYSV_ABI _sceUltWaitingQueueResourcePoolCreate(
 
     if (numThreads > 0 && numSyncObjects > 0 && workArea != nullptr) {
         pool->workArea = workArea;
-        void* w = (void*)((long)workArea + 0x20);
     }
 
     // IF NO ERROR
-    // FUN_0101e800((char *)pool,name)
+    strncpy((char*)pool, name, 0x1f);
     pool->field32_0x20 = 0x100;  // ??
     pool->field33_0x22 = '\x06'; // ??
     pool->numThreads = numThreads * 2;
@@ -91,6 +90,7 @@ int PS4_SYSV_ABI _sceUltQueueDataResourcePoolCreate(
     pool->numData = numData;
     pool->numQueueObjects = numQueueObjects;
     pool->waitingPool = waitingQueueResourcePool;
+    pool->workArea = workArea;
 
     // TODO: BG26hBGiNlw(pool,0x17,&pool->field347_0x170);
 
@@ -119,6 +119,7 @@ int PS4_SYSV_ABI _sceUltQueueCreate(OrbisUltQueue* queue, const char* name, uint
 
         queue->waitingWorkArea = waitingQueueResourcePool->workArea;
         queue->dataWorkArea = queueDataResourcePool->workArea;
+        queue->datasize = dataSize;
 
     } else {
         return ORBIS_ULT_ERROR_NULL;
@@ -142,6 +143,17 @@ int PS4_SYSV_ABI sceUltQueuePush(OrbisUltQueue* queue, void* data) {
 
     if (queue == nullptr || data == nullptr)
         return ORBIS_ULT_ERROR_NULL;
+    
+    // If there is no data in the queue when sceUltQueuePop() is executed, the thread is in the wait
+    // state until data is added to the queue.
+    void* addr = (char*)queue->waitingWorkArea + (queue->datasize) * (queue->uk5);
+
+    if (!addr) // Empty
+        return ORBIS_OK;
+
+    memcpy(addr, data, queue->datasize);
+
+    queue->uk5++;
 
     return ORBIS_OK;
 }
@@ -157,6 +169,19 @@ int PS4_SYSV_ABI sceUltQueuePop(OrbisUltQueue* queue, void* data) {
     if (queue == nullptr || data == nullptr)
         return ORBIS_ULT_ERROR_NULL;
 
+    if (queue->uk5 < 1) // Thread should wait
+        return ORBIS_OK;
+
+    // If there is no data in the queue when sceUltQueuePop() is executed, the thread is in the wait state until data is added to the queue.
+    void* addr = (char*)queue->waitingWorkArea + (queue->datasize) * (queue->uk5 - 1);
+
+    if (!addr) // Empty
+        return ORBIS_OK;
+
+    memcpy(data, addr, queue->datasize);
+
+    queue->uk5--;
+
     return ORBIS_OK;
 }
 
diff --git a/src/core/libraries/ult/ult.h b/src/core/libraries/ult/ult.h
index d8d5163a..94e289e4 100644
--- a/src/core/libraries/ult/ult.h
+++ b/src/core/libraries/ult/ult.h
@@ -14,7 +14,14 @@ namespace Libraries::Ult {
 typedef int32_t (*OrbisUltUlthreadEntry)(uint64_t arg);
 
 struct OrbisUltQueue {
-    char unknown[208];
+    char queue_name[31];
+    char uk[8];
+    u64 uk2;
+    u64 uk3;
+    u64 uk4;
+    void* ukP;
+    u32 uk5;
+    char uk6[131];
     void* waitingWorkArea;
     void* dataWorkArea;
     char unknown2[24];
@@ -44,7 +51,7 @@ struct OrbisUltUlthreadOptParam {
 };
 
 struct OrbisUltWaitingQueueResourcePool {
-    char unknown_padding1[31];
+    char queue_name[31];
     char unknown_char;
     u16 field32_0x20;
     char field33_0x22;
@@ -61,7 +68,7 @@ struct OrbisUltWaitingQueueResourcePoolOptParam {
 };
 
 struct OrbisUltQueueDataResourcePool {
-    char unknown_padding1[31];
+    char queue_name[31];
     short uk_200;
     char uk_a;
     char unknown_char;